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TitleEffects of chromophore conjugation length and concentration on the photostability of indoline-based nonlinear optical chromophore/polymer films
Publication TypeJournal Article
Year of Publication2015
AuthorsKutuvantavida, Y., Williams G.V.M., Bhuiyan M.D.H., Raymond S.G., and Kay A.J.
JournalJournal of Physical Chemistry C
Pagination3273 - 3278
Date Published2015
ISSN19327447 (ISSN)
KeywordsAmorphous films, Amorphous polycarbonates, Chromophore concentrations, Chromophore conjugation, Chromophores, Conjugation length, energy transfer, Excited states, Gas generators, nonlinear optical chromophore, Nonlinear optics, Nonradiative decays, Photo-stability, Singlet oxygen generation
AbstractPhotostability measurements were made on host-guest thin films containing nonlinear optical chromophores with an indoline donor and amorphous polycarbonate. We find that the indoline-based chromophores are nearly 10 times more photostable than an analogous compound previously studied and which has a dihydopyridine donor. There is an enhancement of the photostability with increasing chromophore concentration and conjugation length. This can be attributed to a reduction in the average separation between the chromophores and excited state singlet energy transfer to adjacent chromophores followed by eventual nonradiative decay. This leads to a reduction in the singlet oxygen generation rate as the chromophore concentration or conjugation length is increased. © 2015 American Chemical Society.

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