Studies under Continuous Irradiation of Photochromic Spiro[fluorenopyran-thioxanthenes]
作者:Maria A. Salvador、Paulo J. Coelho、Hugh D. Burrows、M. Manuel Oliveira、Luis M. Carvalho
DOI:10.1002/hlca.200490128
日期:2004.6
New indeno-fused spiro[benzopyran-thioxanthenes] were synthesized (see 3a–d in Scheme 3) 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
新茚并稠合螺[苯并吡喃噻吨]合成(参见图3a - d在方案3)和连续照射下评估其光致变色特性(表1)。当用Xe灯照射几分钟时,该系统的行为就像是由两种开放的彩色形式组成,具有不同的热漂白速率和不同的降解敏感性。辐照时间的增加会导致显着降解,并导致显色占主导地位的开放彩色形式具有更快的漂白速度。