(Z)-1,2-Di(1-pyrenyl)disilene: Synthesis, Structure, and Intramolecular Charge-Transfer Emission
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- 作者：Megumi Kobayashi ; Naoki Hayakawa ; Tsukasa Matsuo ; Baolin Li ; Takeo Fukunaga ; Daisuke Hashizume ; Hiroyuki Fueno ; Kazuyoshi Tanaka ; Kohei Tamao
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：January 27, 2016
- 年：2016
- 卷：138
- 期：3
- 页码：758-761
- 全文大小：348K
- ISSN：1520-5126
文摘
(Z)-1,2-Di(1-pyrenyl)disilene containing bulky 1,1,3,3,5,5,7,7-octaethyl-s-hydrindacen-4-yl (Eind) groups has been obtained as purple crystals by the reductive coupling reaction of the corresponding dibromosilane with lithium naphthalenide. An X-ray crystallographic analysis revealed an Eind- and pyrenyl-meshed molecular gear around the disilene core adopting the Z configuration, in which the two pyrenyl groups intramolecularly interact through the π–π stacking with a distance of 3.635 ? between the centers of the two pyrene rings. The disilene π-system exhibits a π(Si–Si) → π*(pyrene) intramolecular charge-transfer (ICT) fluorescence at room temperature, whose wavelengths depend on the solvent polarity. The photophysical properties are theoretically supported by computational studies including excited-state calculations.