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Two novel asymmetrical diarylethenes with an imidazole-containing substituent have been synthesized. The two diarylethenes exhibited favorable photochromism and functioned as fluorescence switches upon alternating ultraviolet and visible light irradiation. These two compounds could also serve as highly selective ‘naked-eyes’ colorimetric sensors for Cu 2+ . Furthermore, the diarylethene with...
Three new isomeric unsymmetrical diarylethenes bearing both naphthalene and thiophene moieties were synthesized. Their photochromism, fluorescence and electrochemistry properties were investigated in detail. Each of the diarylethene derivatives showed notable photochromism and functioned as an effective fluorescent switch both in solution and in PMMA films. The cyclization quantum yield and the molar...
A group of novel 2-(2′-hydroxyphenyl)benzothiazole derivatives 1–5 were synthesized with electron-donating or -withdrawing substituent introduced in para position of N atom in benzothiazolyl ring. The excited state intramolecular proton transfer (ESIPT) in 1–5 along with non-substituted 2-(2′-hydroxyphenyl)benzothiazole 6 was studied by means of UV–vis absorption and steady-state fluorescence in solutions...
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