Synthesis and photochromic properties of new nonsymmetric dihetarylethenes — indole and thiophene derivatives

Photochromism of Diarylethene Molecules and Crystals: Memories, Switches, and Actuators

“…Many fluorescent diarylethene derivatives were prepared by introducing fluorescent units, such as indole, , furan, , oxazole, , pyrazole, pyrrole, , oligothiophene, , coumarin, − and naphthalene , as the aryl group. 2-Substituted indoles are well-known to exhibit strong fluorescence. , Diarylethene derivatives having a 2-substituted indole 117 and 140 were synthesized.…”

Synthesis, photo- and ionochromic properties of indolyl(thienyl)maleimides with phenanthroline receptor

“…1,10-Phenanthrolin-5-amine 30 (0.13 mmol, 25 mg) and NaOAc (0.13 mmol, 11 mg) in an argon atmosphere were added with stirring to a solution of 0.1 27,28,31 (1с) in AcOH (2 mL) and n-BuOH (2 mL). The reaction mixture was heated at reflux for 4 h. The solvent was removed using a rotary evaporator.…”

“…[23][24][25][26] Results and Discussion Furan-2,5-diones 1a-c were synthesized according to previously described procedures (Scheme 1). 27,28 Their interaction with 1,10-phenanthroline-5-amine afforded indolyl(thienyl)maleimides 2a-c.…”

“…Its formation is caused by the substantial overlap of the absorption bands related to the S0 → S1 transition of the initial form O and the S0 → S2 transition of the photoinduced isomer C. 14, 27 The cyclic isomers 2a-c C did not fluoresce in contrast to the isomers 2a-c O.…”