Organic solar cells (OSCs) have gained considerable attention from the scientific community in recent decades due to their remarkable power conversion efficiency (PCE), flexibility, and cost-effectiveness in producing large-area batteries. Despite the ongoing research efforts that have led to a PCE exceeding 19% for single-junction OSCs and surpassing 20% for multi-junction OSCs, the commercialization of these devices is hampered by their poor stability, reliance on specific additives, and the use of toxic solvents. To address these shortcomings, this study focuses on investigating the 3 * 3 thermosets matrix to facilitate the selection of precursors for in-situ crosslinking thermosets. Furthermore, in this study, we fabricated the devices using green solvents to narrow the gap between PCE and stability under environmentally friendly conditions. We utilized PTQ10: BTP-BO4Cl as the model system and employed tetrahydrofuran (THF) as an eco-friendly solvent. The research focused on examining the thermoset's glass transition temperature (Tg), modulus and morphology properties. The resulting cross-linked thermoset network has high-density hydrogen bonding and network grids, which helps to stabilize the morphology of the active layer. The findings indicated that selecting a thermoset with high Tg, high modulus (4-8 MPa), and good uniformity as an in-situ crosslinking additive would be beneficial. These results can guide the selection of universal in-situ crosslinking thermosets and aid in improving the stability of various organic electronic devices.

Orientador: Cristiano Soleo de Funari / Resumo: Aproximadamente 3,7 x 109 toneladas de resíduos agrícolas são produzidos anualmente no mundo. Por ser uma das grandes potências agrícolas atualmente, grandes quantidades de resíduos agrícolas são geradas constantemente no Brasil. Uma das principais culturas produzidas no país é a soja. Além de seu uso na pecuária, utilizada na alimentação animal, assim como para alimentação humana, a soja desperta grande interesse do ponto de vista farmacológico, por ser uma das principais fontes de isoflavonas, uma forma de fitoestrogênio, sendo umas das espécies listadas na RENISUS. Este trabalho teve como objetivo investigar o perfil químico dos resíduos provenientes da cultura da soja (caules, folhas e vagens) por meio de uma abordagem analítica verde. Os extratos foram obtidos em triplicata por maceração dinâmica a 30 °C, com acetona e etanol, com e sem adição de ácido. O solvente acetonitrila foi utilizado como solvente de referência, pois é comumente empregado tanto para a extração como para a separação de isoflavonas presentes em grãos de soja. Os extratos foram analisados por cromatografia líquida de alta eficiência acoplada a um espectrofotômetro de untravioleta/visível (HPLC-PAD/UV) e a comparação da eficiência de extração entre os solventes testados foi feita com base em número total de picos, área total sob os picos e rendimento da extração. Os solventes verdes etanol e acetona mostraram-se mais eficientes do que o solvente de referência acetonitrila. Posteriormente, uma estratég... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Approximately 3.7 x 109 tonnes of agricultural waste is produced annually in the world. Because it is one of the great agricultural powers today, large amounts of agricultural residues are constantly generated in Brazil. One of the main crops produced in the country is soy. In addition to its use in livestock and human nutrition, the soybean awakes great interest from the pharmacological point of view, being one of the main sources of isoflavones, a form of phytoestrogen, being one of the species listed in RENISUS. The objective of this work was to investigate the chemical profile of residues from soybean (shoots, leaves and pods) using a green analytical approach. The extracts were obtained in triplicate by dynamic maceration at 30 ° C, with acetone and ethanol, with and without acid addition. The solvent acetonitrile was used as reference solvent, since it is commonly used both for the extraction and the separation of isoflavones present in soybean grains. The extracts were analyzed by high performance liquid chromatography coupled to an untraviolet/visible spectrophotometer (HPLC-PAD/UV) and the comparison of the extraction efficiency among the solvents tested was done based on total number of peaks, total area under peaks and extraction yield. The green solvents ethanol and acetone were more efficient than the reference solvent acetonitrile. Subsequently, a strategy for the identification of compounds in mixture, based on data obtained by high performance liquid chromatog... (Complete abstract click electronic access below) / Mestre

Submitted by ARIADNE MAGALHÃES CARNEIRO (ariadnemagcar@hotmail.com) on 2018-06-17T22:48:50Z No. of bitstreams: 1 Dissertação Ariadne Magalhães Carneiro Versão Corrigida 4.pdf: 2192618 bytes, checksum: 14dd0c6daab475134d8c57af4f4d517f (MD5) / Approved for entry into archive by Sulamita Selma C Colnago null (sulamita@btu.unesp.br) on 2018-06-18T20:32:00Z (GMT) No. of bitstreams: 1 carneiro_am_me_bot.pdf: 2192618 bytes, checksum: 14dd0c6daab475134d8c57af4f4d517f (MD5) / Made available in DSpace on 2018-06-18T20:32:00Z (GMT). No. of bitstreams: 1 carneiro_am_me_bot.pdf: 2192618 bytes, checksum: 14dd0c6daab475134d8c57af4f4d517f (MD5) Previous issue date: 2018-04-19 / Aproximadamente 3,7 x 109 toneladas de resíduos agrícolas são produzidos anualmente no mundo. Por ser uma das grandes potências agrícolas atualmente, grandes quantidades de resíduos agrícolas são geradas constantemente no Brasil. Uma das principais culturas produzidas no país é a soja. Além de seu uso na pecuária, utilizada na alimentação animal, assim como para alimentação humana, a soja desperta grande interesse do ponto de vista farmacológico, por ser uma das principais fontes de isoflavonas, uma forma de fitoestrogênio, sendo umas das espécies listadas na RENISUS. Este trabalho teve como objetivo investigar o perfil químico dos resíduos provenientes da cultura da soja (caules, folhas e vagens) por meio de uma abordagem analítica verde. Os extratos foram obtidos em triplicata por maceração dinâmica a 30 °C, com acetona e etanol, com e sem adição de ácido. O solvente acetonitrila foi utilizado como solvente de referência, pois é comumente empregado tanto para a extração como para a separação de isoflavonas presentes em grãos de soja. Os extratos foram analisados por cromatografia líquida de alta eficiência acoplada a um espectrofotômetro de untravioleta/visível (HPLC-PAD/UV) e a comparação da eficiência de extração entre os solventes testados foi feita com base em número total de picos, área total sob os picos e rendimento da extração. Os solventes verdes etanol e acetona mostraram-se mais eficientes do que o solvente de referência acetonitrila. Posteriormente, uma estratégia de identificação de compostos em mistura, baseada em dados obtidos por cromatografia líquida de alta eficiência acoplada a espectrometria de massas de alta resolução (HPLC-PDA/UV-ESI/TOF/MS) e em dados quimiotaxonômicos foi empregada. Foram identificadas as isoflavonas não glicosiladas daidzeína, genisteína e gliciteína, além da flavona apigenina, em resíduos de cultura de soja. Este trabalho sugere que isoflavonas e outros flavonóides poderiam ser obtidos de resíduos agrícolas da cultura de soja, amplamente disponíveis mundialmente, por meio de tecnologias verdes de extração e de análise. / Approximately 3.7 x 109 tonnes of agricultural waste is produced annually in the world. Because it is one of the great agricultural powers today, large amounts of agricultural residues are constantly generated in Brazil. One of the main crops produced in the country is soy. In addition to its use in livestock and human nutrition, the soybean awakes great interest from the pharmacological point of view, being one of the main sources of isoflavones, a form of phytoestrogen, being one of the species listed in RENISUS. The objective of this work was to investigate the chemical profile of residues from soybean (shoots, leaves and pods) using a green analytical approach. The extracts were obtained in triplicate by dynamic maceration at 30 ° C, with acetone and ethanol, with and without acid addition. The solvent acetonitrile was used as reference solvent, since it is commonly used both for the extraction and the separation of isoflavones present in soybean grains. The extracts were analyzed by high performance liquid chromatography coupled to an untraviolet/visible spectrophotometer (HPLC-PAD/UV) and the comparison of the extraction efficiency among the solvents tested was done based on total number of peaks, total area under peaks and extraction yield. The green solvents ethanol and acetone were more efficient than the reference solvent acetonitrile. Subsequently, a strategy for the identification of compounds in mixture, based on data obtained by high performance liquid chromatography coupled to high resolution mass spectrometry (HPLC-PDA/UV-ESI/TOF/MS) and chemotaxonomic data was used. The non-glycosylated isoflavones daidzein, genistein and glycitein, as well as flavone apigenin, were identified in soybean residue. This work suggests that isoflavones and other flavonoids could be obtained from soybean crop residues widely available worldwide through green extraction and analysis technologies.

The aim of this diploma thesis is a study and description of a mutual interaction of solvents belonging to the green solvents group, specifically glutaric acid esters and selected acrylic and alkyd coating systems. In the experimental part of this thesis there is a study of a resistance of the coating systems to solvents by the spotting method, which is subsequently then combined with an adhesion experiment of the coating film by the cross-cut test. Those experiments are made according to matching methods in valid version.

This thesis entitled “Organic Transformations in Water: Synthetic and Mechanistic Studies towards Green Methodologies” is in two parts. Part-I describes various synthetic studies aimed at developing improved methodologies; Part-II describes certain mechanistic studies directed towards an improved understanding of phase transfer catalysis and the hydrophobic effect. Water is uniquely advantageous as a solvent. It is environmentally benign, non-flammable, liquid over a wide temperature range and possesses a high heat capacity that makes it inherently safe. Water also catalyses chemical transformations between insoluble organic reactants. Water thus serves as a reaction medium, a product partitioner and a reaction catalyst.1 Part-I:- Reactions in Water under both Microwave and Ambient Conditions Part-I is further divided into three chapters. Chapter II deals with reactions of 2-nitroalcohols (2NAs), and is divided into three sections. Section A describes the synthesis of nitroalkanes via the microwave-assisted, water-mediated chemoselective reduction of 2NAs using tributyltin hydride (Bu Scheme 1 ). The 2NAs, synthesized from nitromethane and aldehydes (aliphatic, alicyclic, heterocyclic or m- & p-substituted aromatic aldehydes), were converted into corresponding nitroalkanes in excellent yields. The 2NAs derived either from substituted nitromethane [nitroethane, (nitromethyl)benzene, etc.] or bulky aldehydes (o-substituted aromatic aldehydes), however, failed to furnish nitroalkanes under these conditions. Also a major solvent effect was observed: the extent of conversion was greater in water than in water-polar 3SnH) as reducing agent. The chemoselective reduction of 2NAs to nitroalkanes was observed accidentally while trying to remove the nitro group of 2NAs in a Bu3SnH-AIBN-water system under microwave conditions. When equimolar quantities of 2NA and Bu3SnH were added to water, microwave irradiation led to nitroalkanes (protic solvent mixtures and the reaction did not occur either in aprotic polar or non-polar solvents. Scheme 1. Microwave assisted chemoselective reduction of 2NAs to nitroalkanes in Bu3SnH-water In Section B, the microwave assisted synthesis of nitroalkanes from nitroalkenes has been described. Equimolar quantities of nitroalkene and Bu Scheme 2 ). The nitroalkenes substituted even by bulky groups at C-1 & C-2 were converted into corresponding nitroalkanes. Hence the drawback of the method described in Section A was overcome by employing nitroalkenes as starting materials. 3SnH in water under microwave irradiation, led to excellent yields of corresponding nitroalkanes (Scheme 2). The nitroalkenes substituted even by bulky groups at C-1 & C-2 were converted into corresponding nitroalkanes. Hence the drawback of the method described in Section A was overcome by employing nitroalkenes as starting materials. Scheme 2. Microwave assisted reduction of nitroalkenes to nitroalkanes in Bu3SnH-water In Section C, the synthesis of nitroalkenes via dehydration of 2NAs in a K Scheme 3 ). Thus, the dehydration of 2NAs has been accomplished under relatively mild conditions. (It was observed that the 2NAs bearing bulky groups underwent the retro-Henry reaction rather than dehydration.) 2CO3-water system has been described. This conversion was accomplished at 0-5 °C in 5-30 minutes, the nitroalkenes being isolated in good yields (Scheme 3). Thus, the dehydration of 2NAs has been accomplished under relatively mild conditions. (It was observed that the 2NAs bearing bulky groups underwent the retro-Henry reaction rather than dehydration.) Scheme 3. Dehydration of 2-NAs in aqueous K2CO3 solution Chapter III describes the chemoselective reduction of ketoaldehydes. This was serendipitously discovered during attempted enantioselective reduction of prochiral ketones using amino acid-NaBH Scheme 4 ). The method provides a mild and efficient route for the chemoselective reduction of aldehydes under aqueous basic conditions. 4-Na2CO3 in water. When equimolar quantities of aldehyde and ketone were added to a solution NaBH4 in aqueous Na2CO3 at ambient temperature, the aldehydes were selectively reduced. Good yields of primary alcohols were generally observed with excellent chemoselectivities. Extension of this study to the selective reduction of ketoaldehydes under the above reaction conditions furnished ketoalcohols in > 70% yields with > 80% chemoselectivities (Scheme 4). The method provides a mild and efficient route for the chemoselective reduction of aldehydes under aqueous basic conditions. Scheme 4. Chemoselective reduction of ketoaldehydes with NaBH4-Na2CO3 in water Chapter IV deals with deprotection of various acetals, thioacetals and tetrahydropyranyl (THP) ethers in hexane under ambient conditions, by employing chloral hydrate as reagent. Chloral hydrate is a crystalline solid with pK2 When a a 9.66.stirred suspension of excess chloral hydrate in hexane was treated with the acetal, thioacetal or THP ether, the corresponding aldehyde, ketone and alcohol were obtained in good to excellent yields (stirred suspension of excess chloral hydrate in hexane was treated with the acetal, thioacetal or THP ether, the corresponding aldehyde, ketone and alcohol were obtained in good to excellent yields (stirred suspension of excess chloral hydrate in hexane was treated with the acetal, thioacetal or THP ether, the corresponding aldehyde, ketone and alcohol were obtained in good to excellent yields ( Scheme 5. Chloral hydrate catalyzed hydrolysis of acetals, thioacetals including THP ethers Part-II:- Mechanistic Studies on Phase Transfer Catalysis and The Hydrophobic Effect Part-II is in two chapters. Chapter V describes a study of the mechanism of the phase transfer catalyzed (PTC) nucleophilic reaction of cyanide ion with alkyl halides in decane ( Scheme 7 ). In the extraction mechanism proposed earlier,3 the PTC forms the mixed species, tributylhexadecylphosphonium cyanide (THPB), which is believed to be more soluble in decane than is the starting cyanide. A problem with this explanation is that the positive free energy of transfer of the cyanide ion from the aqueous to the organic phase, which is unlikely to be offset by solvation energy of the hexadecyl and butyl groups. Scheme 6. Cyanide displacement reaction of 1-chloro octane3 The present studies explore the possibility that the reaction occurs via the formation of aggregates resembling reverse micelles ( Figure 1 ). In these, the hydrocarbon residues point outwards, with the ionic species ensconced in a deeply embedded interior along with a certain number of water molecules. Thus, the ionic species are not only shielded from the organic medium, but also stabilized in a relatively polar micro-environment (largely via dipolar interactions and hydrogen bonding). It is assumed that this stabilization energy surpasses the positive free energy of transfer of cyanide ion from aqueous to the organic phase. Figure 1. Typical representation of cyanide displacement reaction in THPB-decane-water micellar pool In fact, NMR studies on the structural dynamics of THPB in solution offered evidence of aggregation. Also, a correlation between the structures of catalyst and reactant was observed in studies with various other PTC’s. Chapter VI deals with the mechanism of the Diels-Alder reaction (DAR) in water. The concept of the hydrophobic effect (HE)4 and preferential hydrogen bonding of water with the polarized transition state5 have been invoked to explain the apparent acceleration of Diels-Alder reactions in water. The present studies explore the possibility that the highly polar water microenvironment stabilizes the transition state. Semi-quantitative rate studies of DAR involving water soluble reactants indicate that the possible role of solvation and hydrogen bonding on the polarized transition state as the key factor in the rate enhancement of water mediated DAR. The DAR in the presence of a catalytic amount of water along with the organic solvent catalyzed the reaction more efficiently, as compared to the reaction in pure organic solvent. It was also observed that there was a prominent effect of traces of water on the rate in solvent-free conditions. .

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Ce travail de doctorat consiste à valoriser les coproduits issus des industries d’agrumes par des technologies innovantes. Le pressage des agrumes produit des millions de tonnes de déchets par an dans le monde. Ces déchets (peaux, pulpes et pépins) sont généralement dédiés à l’alimentation animale ou bien éliminés par compostage ou incinération. Cependant leur contenu en molécules bioactives conduit à plusieurs voies de valorisation. Vu que les peaux constituent à peu près la moitié de la masse des déchets d’agrumes, les études ont été faites sur la valorisation des peaux de différents types d’agrumes. Les méthodes conventionnelles généralement utilisées pour l’extraction des molécules d’intérêt (extraction solide-liquide, hydrodistillation) présentent plusieurs désavantages tels que l’utilisation des solvants coûteux et toxiques, les longues durées d’extraction et la consommation élevée en énergie. Pour cette raison plusieurs technologies innovantes non thermiques telles que les Champs Electriques Pulsés (CEP), les Décharges Électriques de Haute Tension (DEHT) et les ultrasons (US) et thermiques comme les microondes (MO) et les infrarouges (IR) ont été testées dans ce travail de thèse, pour la valorisation des coproduits d’agrumes. Les agrumes entiers (oranges, pomelos, citrons) sont traités par les CEP à une intensité de 3 kV/cm et l’extraction du jus d’agrumes et des polyphénols a été réalisée par pressage. L’étude de la perméabilisation cellulaire induite par les CEP a été réalisée par plusieurs méthodes et a montré que les degrés d’endommagement diffèrent selon le type d’agrumes traités. L’électroporation des cellules, induite par les CEP a permis d’augmenter les rendements en jus après pressage et d’améliorer le passage des polyphénols des peaux d’agrumes dans le jus. Ce qui explique la possibilité d’obtention d’un jus riche en polyphénols en traitant les agrumes par les CEP avant leur pressage. Parmi les solvants testés pour l’extraction des polyphénols à partir des peaux d’agrumes, l’eau est le moins efficace. L’ajout de 20% de glycérol dans l’eau a modifié la polarité du milieu et a amélioré l’extraction des polyphénols. L’utilisation d’un mélange enzymatique a favorisé la libération des polyphénols piégés dans les polysaccharides. Les solvants eutectiques profonds préparés, ont été aussi efficaces que les mélanges hydro éthanoliques. Pour améliorer d’avantages l’extraction dans les différents solvants verts ou dans le mélange enzymatique, les peaux d’agrumes ont été prétraitées par les DEHT dans l’eau. L’effet mécanique des DEHT, capable de fragmenter les peaux a permis d’améliorer l’extraction des polyphénols 6 dans les différents solvants. L’intensification de l’extraction des polyphénols a été aussi réalisée par les IR et les US. L’extraction des polyphénols par les IR a été optimisée en ayant recours à la méthodologie de surface de réponse. Le chauffage par les IR n’a pas altéré les polyphénols extraits qui ont gardé des activités antifongiques et anti-mycotoxinogènes importantes. Le prétraitement des peaux d’agrumes par les IR sans solvant a fragilisé les structures cellulaires, ce qui a permis d’augmenter la diffusion des polyphénols durant le traitement avec les US. / This work consists of the valorization of citrus by-products with innovative technologies. Citrus pressing produces millions of tons of waste per year worldwide. This waste (peels, pulps and seeds) is generally dedicated to animal feed or eliminated by composting or incineration. However its content in bioactive molecules leads to several ways of valorization. Since peels present about half of the citrus waste mass, studies have been focused on the valorization of citrus peels by the extraction of bioactive compounds. Conventional methods generally used for the extraction of bioactive compounds (solid-liquid extraction, hydrodistillation) have several disadvantages such as the use of expensive and toxic solvents, long extraction times and high energy consumption. For this reason, several innovative non-thermal technologies such as Pulsed Electric Fields (PEF), High Voltage Electrical Discharges (HVED) and Ultrasounds (US) and thermal treatments such as microwaves (MO) and infrared (IR) have been tested for the valorization of citrus by-products. Whole citrus fruits (oranges, pomelos, lemons) were PEF treated at an intensity of 3 kV/cm, then citrus juice and polyphenols were extracted by pressing. The study of the PEF-induced cell permeabilization was conducted by several methods and showed that the degree of damage varied according to the type of the treated fruit. The electroporation of the cells induced by the PEF, allowed an increase the juice yields after pressing and improved the liberation of the polyphenols from the citrus peels into the juice. This explains the possibility of obtaining a juice rich in polyphenols by treating the whole fruits with PEF before pressing. Among the solvents tested for the extraction of polyphenols from citrus peels, water is the least effective. The addition of 20% glycerol to water changed the polarity of the medium and improved the extraction of the polyphenols. The use of an enzyme mixture enhanced the release of the polyphenols related to the polysaccharides. Deep eutectic solvents have been as effective as hydroethanolic mixtures. To improve the yields and the kinetics of extractions in the different green solvents and in the enzyme mixture, citrus peels were pretreated with HVED in water. The mechanical effect of HVED, based on the fragmentation of the peels has improved the extraction of polyphenols in the various solvents. The intensification of polyphenols extraction was also conducted by IR and US. The extraction of polyphenols by IR was optimized using the surface response methodology. IR heating did not alter the extracted polyphenols which have significant antifungal and anti-mycotoxinogenic activities. The pretreatment of citrus peels with IR weakened the cell structures, increasing thus the diffusion of polyphenols during US treatment.

Vinyltrialkoxysilanes are grafted onto polyolefins via a radical mechanism; in a subsequent step, the pendant alkoxysilanes hydrolyze and condense upon exposure to water, resulting formation of crosslinks. Straight chain hydrocarbons were used as model compounds to investigate the regioselectivity of vinyltrimethoxysilane grafting. To stabilize the water-sensitive grafted products, the methoxy groups were substituted using phenyllithium. It was found that this reaction must be carried out for a minimum of three days to ensure full substitution. The grafted products were then separated on a weight basis using semi-preparative HPLC. Analysis of the di-grafted fraction using edited HSQC and HSQC-TOCSY NMR showed that radical propagation occurs via 1,4- and 1,5-intramolecular hydrogen shifts along the hydrocarbon backbone, resulting in multiple grafts per backbone. Post-combustion carbon capture targets CO₂ emissions from large point sources for capture and sequestration. A new class of potential carbon capture agents known as reversible ionic liquids (RevILs) has been synthesized and evaluated in terms of potential performance parameters (e.g. CO₂ capacity, viscosity, enthalpy of regeneration). These RevILs are silylated amines, which react with CO₂ to form a salt comprising an ammonium cation and a carbamate anion that is liquid at room temperature. Structural modifications of the basic silylamine skeleton result in drastic differences in the performance of the resulting RevIL. Systematic variation of the silylated amines allowed determination of a structure-property relationship, and continued iterations will allow development of an ideal candidate for scale-up. The properties and potential applications of gold nanoparticles (AuNP) are highly dependent on their size and shape. These properties are commonly controlled during liquid-phase synthesis through the use of capping agents, which must be removed following synthesis. Reverse micelles can also be used to control the morphology of AuNP during their synthesis. When RevILs are used in the formation of these reverse micelles, either as the disperse phase or as the surfactant, the built-in switch can be used to release the nanoparticles following their synthesis. This release on command could decrease the post-synthetic steps required to clean and purify AuNP prior to use. We have successfully synthesized AuNP using a number of different RevILs.

L(objectif de cette thèse a été de développer de nouveaux solvants d'absorption des composés organiques volatils (COV). Ces derniers sont des polluants atmosphériques primaires généralement utilisés comme solvants et émis directement par les industries. Ils induisent des effets nocifs pour la santé, et certains d'entre eux, sont classés comme cancérogènes. La réduction des émissions de ces polluants reste donc une préoccupation majeure. L'objectif de notre travail a été d'évaluer les solvants eutectiques profonds (DES) comme absorbants pour les COV. Les DES représentent une nouvelle génération de solvants. Ils sont formés par simple mélange de 2 ou plusieurs composés. Ils peuvent être produits à partir de composés économiques, naturels et biodégradables. La préparation de ces solvants est facile et permet une économie d'atome de 100%. Le travail a été divisé en trois parties.La première partie a été consacrée à la caractérisation des propriétés physico-chimiques des DES, telles que la densité et la viscosité. L'analyse des spectres infrarouge des DES et de leurs composés purs a montré une implication des liaisons hydrogène dans la formation des DES. La polarité a été étudiée à l'aide de la sonde Nile red. Enfin, la solubilité de gaz (CO₂, CH₄ and Ar) a été mesurée dans les DES en fonction de la température. La deuxième partie a porté sur l'évaluation de la capacité d'absorption des DES en utilisant la technique d'headspace statique couplée à la chromatographie en phase gazeuse. Ceci nous a permis de déterminer le coefficient de partage gaz/liquide pour les COV dans les DES à différentes températures. L'influence des mélanges de COV sur les capacités d'absorption des DES a été également déterminée. Ces derniers ont montré des capacités d'absorption élevées pour la variété de COV, sans saturation même à forte concentration. Un nouveau système DES-cyclodextrine a également été évalué. Les capacités d'absorption ont été améliorées grâce au rôle de molécule cage de la cyclodextrine. La deuxième partie a été tournée vers l'application industrielle. Nous avons évalué les capacités d'absorption des DES à l'aide d'un montage dynamique qui simule une colonne d'absorption industrielle. Cette installation permet de moduler le débit du COV, les teneurs en eau ainsi que la température de la colonne. Enfin, la régénération des DES a été effectuée par plusieurs cycles absorption/désorption sans perte de capacité d'absorption. En conclusion, l'ensemble des résultats obtenus a montré que les DES possédaient de nombreux atouts leur permettant d'être considérés comme des solvants prometteurs pour l'absorption des COV. / The aim of this thesis was to develop new solvents for the absorption of volatile organic compounds (VOC). VOC are primary air pollutants generally used as solvents and emitted directly from industries. They have adverse health effects and some of them are classified as carcinogenic. Consequently, the reduction of the emissions of these pollutants remains a major challenge to reduce air pollution. Hence, our objective was to evaluate deep eutectic solvants (DES) as absorbents for VOCs. DESs represent a new generation of solvents that is formed by simply mixing two or more compounds. They can be produced from cheap, natural and biodegradable compounds. The preparation of these solvents is easy and is 100% atom efficient. This work was divided into three parts.The first part focused on the physicochemical properties of DES, such as density and viscosity. Analysis of the infrared spectra of DES and their pure compounds showed that hydrogen bonds are essential for the formation of DES. Their polarity was studied using the Nile red probe. In addition, solubility of various gases (CO₂, CH₄ and Ar) was measured as a function of temperature. The second part dealt with the evaluation of the aborsption capacity of DESs using static headspace coupled with gas chromatography. The determination of gas/liquid partition coefficient was performed for various VOC and DES at different temperatures. In addition, the influence of VOC mixtures on DES absorption capacities was determined. DES showed high absorption capacities for a variety of VOCs, without saturation even at high concentration. A new DES-cyclodextrin system was developed and showed improved absorption capacities due to the complexation ability of the cyclodextrin. The last part was oriented towards the industrial application of DESs. The absorption capacities of DESs were evaluated using a dynamic set-up which simulated an industrial absorption column. This set-up allows the modulation of the VOC flow rate, water content and column temperature. Finally, the regeneration of the absorbent was carried out by several absorption/desorption cycles without loss of absorption capacity. In conclusion, the overall results showed that DES have characteristics that allow them to be considered as promising solvents for VOC absorption.