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LASER PHOTOLYSIS STUDY ON POLY( N ‐VINYLCARBAZOLE) ADSORBED ON CELLULOSE SUBSTRATE
Author(s) -
Mizuma Hirokazu,
Fukumura Hiroshi,
Masuhara Hiroshi
Publication year - 1993
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1993.tb04970.x
Subject(s) - photochemistry , chemistry , electron acceptor , substrate (aquarium) , polymer , absorption spectroscopy , adsorption , acceptor , absorption (acoustics) , ion , photodissociation , cellulose , ultrafast laser spectroscopy , kinetics , flash photolysis , materials science , laser , reaction rate constant , organic chemistry , oceanography , physics , quantum mechanics , condensed matter physics , optics , composite material , geology
Triplet state and photoinduced charge separation dynamics under adsorption was Confirmed for the first time for the polymer without or with coadsorbed electron acceptor, respectively. The absorption spectrum of the triplet polymer is similar to the T n ← T 1 band of N ‐ethylcarbazole, showing no appreciable interchromophoric interaction. Absorption spectra of the coadsorbed systems comprise the polymer cation and electron acceptor anion. The ion radicals on the cellulose substrate undergo mutual recombination, and simple uni‐ and bimolecular decay kinetics do not hold. This mechanism was compared with that for poly( N ‐vinylcarbazole) film.