Preparation of Tetrazole-fused p-Conjugated Molecules and Their Fluorescence Behavior
| Title: | Preparation of Tetrazole-fused p-Conjugated Molecules and Their Fluorescence Behavior |
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| Authors: | Hata, Takeshi, Hayashi, Yoshiki, Hasegawa, Yuki, Iwai, Masaaki, Ishii, Ayumi, Hasegawa, Miki, Shigeta, Masayuki, Urabe, Hirokazu |
| Source: | Chemistry Letters; July 2019, Vol. 48 Issue: 7 p662-665, 4p |
| Abstract: | New tetrazole-fused p-conjugated molecules were prepared from dibromobenzonitriles by repeated regioselective Sonogashira-Hagihara cross-coupling with acetylenes and intramolecular nucleophilic cyclizations. The conjugated tetracyclic compounds exhibited fluorescence with lifetimes of nanosecond order. From TD-DFT calculations, excited state wavefunctions of compounds indicated that the HOMO-1 ? LUMO and HOMO ? LUMO+1 mainly became the first excited state (S0? S1) to contribute significantly to light emission.New tetrazole-fused p-conjugated molecules were prepared from dibromobenzonitriles by repeated regioselective Sonogashira-Hagihara cross-coupling with acetylenes and intramolecular nucleophilic cyclizations. The conjugated tetracyclic compounds exhibited fluorescence with lifetimes of nanosecond order. From TD-DFT calculations, excited state wavefunctions of compounds indicated that the HOMO-1 ? LUMO and HOMO ? LUMO+1 mainly became the first excited state (S0? S1) to contribute significantly to light emission. |
| Database: | Supplemental Index |
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