New photosetting NLO-active polythiophenes with enhanced optical stability

A new molecular design strategy devoted to the obtainment of polythiophenes showing a second-order NLO response that is stable in time is reported and commented on. The adopted synthetic procedure, based on the functionalization of soluble and stable polymeric precursors, leads to a photocrosslinkab...

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Bibliographic Details
Published inEuropean polymer journal Vol. 45; no. 4; pp. 1118 - 1126
Main Authors Lanzi, Massimiliano, Paganin, Luisa
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.04.2009
Elsevier
Subjects
2nd-order non-linear optical activity
Applied sciences
Azobenzene
Exact sciences and technology
Organic polymers
Photo-curing
Physicochemistry of polymers
Polymers with particular properties
Polythiophene
Preparation, kinetics, thermodynamics, mechanism and catalysts
Soluble multifunctional polymers
Photo-curing
2nd-order non-linear optical activity
Polythiophene
Azobenzene
Soluble multifunctional polymers
Terpolymer
Second harmonic generation
Photochemical crosslinking
Non linear optics
Experimental study
Functional polymer
Crosslinked copolymer
Azo compound
Chemical modification
Side chain
Conjugated copolymer
Optical properties
Preparation
Aromatic copolymer
Light sensitive copolymer
Optical material
Thiophene derivative copolymer
Cinnamic derivative copolymer
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Summary:A new molecular design strategy devoted to the obtainment of polythiophenes showing a second-order NLO response that is stable in time is reported and commented on. The adopted synthetic procedure, based on the functionalization of soluble and stable polymeric precursors, leads to a photocrosslinkable polymer which, after curing, shows a decay of the order parameter ϕ notably slower than in previously synthesized NLO-active polymers containing the same kind of chromophore. The curing conditions have been carefully monitored and optimized, since they not only influence the chain mobility, but also strongly affect the electronic delocalization of the polyconjugated backbone. Detrimental effects can, however, be avoided by using suitable functional groups in the side chains, acting as internal plasticizers without being sensitizers for the photobleaching process.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2009.01.013