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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

ESTUDO TEÓRICO DA INTERAÇÃO DO OXIGÊNIO MOLECULAR COM OS COMPLEXOS DE DIBENZOTETRAAZA[14]ALUNENO DE FERRO (II) E MANGANÊS (II) / THEORETICAL STUDY OF THE INTERACTION OF MOLECULAR OXYGEN WITH THE COMPLEXES DIBENZOTETRAAZA [14] ALUNENO IRON (II) AND MANGANESE (II)

Costa, Hawbertt Rocha 31 January 2012 (has links)
Made available in DSpace on 2016-08-19T12:56:38Z (GMT). No. of bitstreams: 1 dissertacao Hawbertt.pdf: 1784434 bytes, checksum: a91c14bbd01d8e403347116b6955398d (MD5) Previous issue date: 2012-01-31 / FUNDAÇÃO DE AMPARO À PESQUISA E AO DESENVOLVIMENTO CIENTIFICO E TECNOLÓGICO DO MARANHÃO / This work presents computational studies of complexes of Fe (II) TAA and Mn (II) TAA using calculations based on density functional theory (DFT). Thus, Fe (II) TAA and Mn (II) TAA, with various multiplicities, were optimized and a comparative study with experimental data was conducted to investigate the distances and bond angles as well as other parameters such as the total energy and the frontier orbitals (HOMO-LUMO). In addition, we also carried out calculations of these complexes with molecular oxygen adsorbed in order to analyze the catalytic behavior for the oxygen reduction reaction. Thus, the lower binding energy and vibrational frequencies of the complex of Fe (II) TAA gave it a higher catalytic activity for this purpose. / Este trabalho apresenta estudos computacionais dos complexos de Fe(II)TAA e Mn(II)TAA usando cálculos com base na teoria funcional da densidade (DFT). Sendo assim, Fe(II)TAA e Mn(II)TAA, com várias multiplicidades, foram otimizadas e um estudo comparativo com dados experimentais foi realizado, a fim de investigar as distâncias e ângulos de ligação, bem como outros parâmetros, como, a energia total e os orbitais de fronteira (HOMO-LUMO). Além disso, também foram realizados cálculos destes complexos com oxigênio molecular adsorvido, a fim de se analisar o comportamento catalítico para a reação de redução de oxigênio. Desse modo, a menor energia de ligação e frequências vibracionais do complexo de Fe(II)TAA lhe conferiu uma maior atividade catalítica para este propósito.
2

MULTI-FUNCTIONAL CARBON-BASED NANOMATERIALS FOR ENERGY CONVERSION AND STORAGE

Dai, Quanbin 25 January 2022 (has links)
No description available.

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