Twisted Tethered Tolanes: Unanticipated Long-Lived Phosphorescence at 77 K

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• 作者：Sebastian Menning ; Maximilian Kr盲mer ; Benjamin A. Coombs ; Frank Rominger ; Andrew Beeby ; Andreas Dreuw ; Uwe H. F. Bunz
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：135
• 期：6
• 页码：2160-2163
• 全文大小：285K
• 年卷期：v.135,no.6(February 13, 2013)
• ISSN：1520-5126

文摘

Influencing the communication within a conjugated system as diphenylacetylene is a challenging subject in molecular electronics. Some examples of twisted tolanes are known, where high twists have been achieved in the solid state by steric encumbrance. The insertion of a spacer system is an alternative way to tailor rotation. Only a few examples of such tethered tolanes exist, and they all suffer from small twist angles (<35掳). We report on tolanophanes containing a malonyl tether, where twist angles of almost 80掳 were reached. Long-lived phosphorescence (4 s at 77 K) was recorded, and quantum-chemical calculations were performed to confirm the experimental results.