Synthesis and photochromic behaviour under flash photolysis and continuous irradiation of novel 2H-chromenes derived from hydroxydibenzothiophenes
作者:M.Manuel Oliveira、Corinne Moustrou、Luis M Carvalho、José A.C Silva、André Samat、Robert Guglielmetti、Roger Dubest、Jean Aubard、Ana M.F Oliveira-Campos
DOI:10.1016/s0040-4020(02)00023-6
日期:2002.2
The synthesis and photochromic properties, under flash photolysis and continuous irradiation, of new 2,2-diphenyl-2H-1-benzopyrans including a dibenzothiophene nucleus are described. Under flash photolysis, all compounds exhibit photochromic behaviour in solution at room temperature, but under continuous irradiation the same was not perceived. Compared to reference compounds, a general bathochromic
描述了在快速光解和连续照射下,包括二苯并噻吩核的新的2,2-二苯基-2 H -1-苯并吡喃的合成和光致变色性质。在快速光解下,所有化合物在室温下的溶液中均表现出光致变色行为,但在连续照射下未观察到相同的现象。与参考化合物相比,观察到一般的红移和开放形式的Vis光谱中存在两个吸收带,从而导致吸收范围内出现发色。杂芳基化对光谱动力学参数的影响是可变的,并且取决于稠合的苯并噻吩部分的位置和几何形状。2 H的C(6)中吸电子取代基的作用分析了在7,8位融合了苯并噻吩核的-1-苯并吡喃骨架。