Studies under continuous irradiation of photochromic spiro[ fluorenopyran-thioxanthenes]
authors Salvador, MA; Coelho, PJ; Burrows, HD; Oliveira, MM; Carvalho, LM
journal HELVETICA CHIMICA ACTA
keywords BEHAVIOR; SYSTEMS
abstract New indeno-fused spiro[benzopyran-thioxanthenes] were synthesized (see 3a-d in Scheme3) and their photochromic properties evaluated under continuous irradiation (Table 1). When submitted to irradiation for several minutes with a Xe lamp, the system behaved as one constituted by two open colored forms with different thermal bleaching rates and different susceptibilities to degradation. An increase in irradiation time led to significant degradation and to the apparent predominance of the open colored form with the faster bleaching rate.
publisher WILEY-V C H VERLAG GMBH
issn 0018-019X
year published 2004
volume 87
issue 6
beginning page 1400
ending page 1410
digital object identifier (doi) 10.1002/hlca.200490128
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000222544200009
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journal impact factor 1.081
5 year journal impact factor 1.046
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