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A novel carbazole-substituted naphthopyran, 3,3-bis-(4-carbazolylphenyl)-[3H]-naphtho[2,1-b]pyran (CzNP) was designed and synthesized. The new compound exhibited normal photochromism in dichloromethane solution and the UV irradiation did not influence its fluorescence. On the contrary, the fluorescence of CzNP in N,N-dimethylformamide (DMF) was intensively enhanced to 29 times after 60min of the UV...
Photoisomerization: N‐phenylcarbazole‐conjugated dimethyl 2,3‐diethynylfumarate/maleate, E/Z‐4, shows highly efficient and reversible visible‐light E/Z photoisomerization (Φtotal=0.40) upon excitation with an intramolecular charge‐transfer band. This photochromism induces switching of electronic communication between the two N‐phenylcarbazole moieties in the one‐electron oxidized mixed‐valent state...
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