Synthesis of novel photochromic fluorescing 2-indolylfulgimides
作者:Yongchao Liang、A.S. Dvornikov、P.M. Rentzepis
DOI:10.1016/s0040-4039(99)01702-5
日期:1999.11
A series of novel N-substituted, thermally stable photochromic fluorescing 2-indolylfulmides were synthesized with high yields (>80%) from the corresponding fulgides by Lewis acid and hexamethyldisilazane-promoted one-pot reaction.
The mechanisms of photochromic transformations of 2-indolylfulgides
作者:O. Yu. Fedorovsky、V. L. Ivanov、B. M. Uzhinov
DOI:10.1007/bf02494887
日期:2000.6
Photochromic properties of 2-indolylfulgides, namely, Z-3-[1-(1,3-dimethyl-1H-indol-2-yl)ethylidene]-4-isopropylidenetetrahydrofun-2,5-dione and E-3-isopropylidene-4-(1-methyl-1H-indol-2-ylmethylidene)tetrahydrofuran-2,5-dione, were studied. The quantum yields of their photochemical isomerizations in toluene and the rate constant of the dark ring-opening in ethanol were determined. The fluorescence spectra of the open and cyclic forms of 2-indolylfulgides were measured. It was assumed that the excited-state Z-isomer can be transformed into a cyclic isomer without intermediacy of an E-isomer in the ground state.