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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.
61

Structural factors that govern the synthesis efficiency of organoplatinum poly(dendrimer)s. / CUHK electronic theses & dissertations collection

January 2010 (has links)
Chapter 1 gives a brief introduction about dendrimers, their synthesis, characterization methods and applications. Chapter 2 summarizes the current research progress on the various dendritic nanostructures, namely, dendronized polymers, dendrimer-linear polymer hybrids, poly(dendrimer)s and poly(dendrimer) networks. In Chapter 3, we reported the detailed synthesis of the two series of dendritic macromonomers (S-Gn and L-Gn, n = 1--3) with different branch lengths (C-O for S-Gn and C--C--C--O for L-Gn) and hence varying structural flexibilities. The structures of these dendritic compounds were characterized by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, gel permeation chromatography (GPC), mass spectrometry (MS) and elemental analysis. The polymerization reactions with trans -Pt-linker 65 was firstly conducted to obtain organoplatinum poly(dendrimer)s Pt-S/L-Gn 144-149. It was found that the structurally more rigid dendritic mamcromonomers (S-Gn series) have a higher degree of polymerization (DP) than the structurally more flexible one (L-Gn series) of the same generation. This was attributed to the formation of cyclic oligomers in the latter series. In Chapter 4, we investigated the polymerization behavior of the two series of dendritic macromonomers towards two other Pt-linkers of different geometry, namely, cis-Pt-linker 152 and long-trans-Pt-linker 156 to obtain poly(dendrimer)s cis-Pt-S/L-Gn 157-162 and long-trans-Pt-S/L-Gn 163-168 respectively. It was revealed that only oligomers and/or cyclic oligomers were formed in both S-Gn and L-Gn series in the former case. In contrast, poly(dendrimer)s long-trans-Pt-S/L-Gn 163-168 were obtained in high DP values and the formation of oligomers and/or cyclic oligomers was greatly suppressed. A model was proposed to account for the different polymerization outcomes based on the different steric and structural environment of the two reacting partners. A conclusion of this work and an outlook of the project were given in Chapter 5. / This thesis described the research work on the synthesis of poly(dendrimer)s using an outer-sphere--outer-sphere connection strategy. Two G1--G3 series of dendritic macromonomers having short branches ( 73-75) and long branches (76-78) containing two surfaces (functionalized acetylene surface groups) were prepared in high purity and copolymerized with three different type of platinum linkers 65, 152 and 156 to form organoplatinum poly(dendrimer)s. The structural effects of the dendritic macromonomers and platinum tinkers on the polymerization efficiency were investigated. / Cheung, Siu Yin. / "December 2009." / Adviser: Hak-Fun Chow. / Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 146-159). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese.
62

Effect of localized structural perturbations on dendrimer structure

Gabriel, Christopher, January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 323-332).
63

Synthesis and photophysics of 3, 4, 9, 10 perylene tetracarboxylic diimide dendrimers /

Cohen, Terry Suzanne, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 307-315). Available also in a digital version from Dissertation Abstracts.
64

Tryptamine terminated 1st generation polyamide dendrimer synthesis and drug release /

Komurcu, Ramazan. January 2007 (has links)
Thesis (M.S.)--University of Akron, Dept. of Chemical Engineering, 2007. / "December, 2007." Title from electronic thesis title page (viewed 02/25/2008) Advisor, Stephanie T. Lopina; Faculty readers, Bi-min Newby, Helen Qammar; Department Chair, Lu-Kwang Ju; Dean of the College, George K. Haritos; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
65

Characterisation of organic materials for photovoltaic devices /

Lewis, Andrew J. January 2006 (has links)
Thesis (Ph.D.) - University of St Andrews, October 2006.
66

Removal of copper(II) and lead(II) from soils by poly(amidoamine) dendrimers and reductive immobilization of chromium(VI) by stabilized zero-valent iron nanoparticles

Xu, Yinhui. Zhao, Dongye. January 2006 (has links) (PDF)
Dissertation (Ph.D.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.173-200).
67

Comparison of hyperbranched and dendritic polymers with fluorescent reporter molecules

Kline, Katrina K., Tucker, Sheryl A. January 2009 (has links)
The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on March 26, 2010). Thesis advisor: Dr. Sheryl Tucker. Vita. Includes bibliographical references.
68

Using PAMAM dendrimer frameworks to investigate multivalent binding in protein-carbohydrate interactions

Wolfenden, Mark Leroy. January 2009 (has links) (PDF)
Thesis (PhD)--Montana State University--Bozeman, 2009. / Typescript. Chairperson, Graduate Committee: Mary J. Cloninger. Includes bibliographical references (leaves 275-288).
69

Dendrimer light-emitting diodes /

Stevenson, Stuart G. January 2008 (has links)
Thesis (Ph.D.) - University of St Andrews, August 2008. / Restricted until 14th August 2013.
70

Polyhedral oligomeric silsesquioxanes in catalysis and photoluminescence applications /

Vautravers, Nicolas R. January 2009 (has links)
Thesis (Ph.D.) - University of St Andrews, January 2009.

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