Journal
POLYMER
Volume 50, Issue 6, Pages 1369-1377Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.01.053
Keywords
Diblock copolymer; Fullerene; Click chemistry
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Funding
- Universite Laval
- National Sciences and Engineering Research Council of Canada (NSERC)
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A series of dendronized diblock copolymers having rigid backbone and reactive surface were synthesized by ring-opening metathesis polymerization (ROMP) from dendronized norbornene derivatives using the second generation Grubb's catalyst. The bromine-terminated block of those rigid nanostructures has been converted to more reactive azide groups in one straightforward step. The resulting polymers were then functionalized by post-polymerization reaction with fullerene C-60 (electron acceptor) using thermal [3+2] cycloaddition reaction or with porphyrin (electron donor) using copper-catalyzed click chemistry, the ultimate goal being the preparation of efficient polymeric materials for photovoltaic applications. While fullerene addition was not complete (approximately 50%) because of cross-linking reactions and steric hindrance on the dendrimers surface, Zn-porphyrin introduction went to completion clearly demonstrating the usefulness of click chemistry for polymer functionalization. (C) 2009 Elsevier Ltd, All rights reserved.
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