发光
芘
分子内力
离子
光化学
激发态
材料科学
结晶学
化学
立体化学
有机化学
光电子学
原子物理学
物理
作者
Takumi Yanagihara,Kazuo Tanaka
标识
DOI:10.1002/adom.202300492
摘要
Abstract This study reports unique luminescent properties of pyrene‐substituted nido ‐carborate anion ( PY n CA ) with two counter cations, tetrabutylammonium (NBu 4 + ) and tetraphenylphosphonium (PPh 4 + ). It is revealed that PY n CA shows twisted intramolecular charge transfer (TICT) emission by the change of the dihedral angle between pyrene and the C cage C cage bond in the carborane unit in the excited state. Although the structure of n CA is almost same as that of ortho ‐carborane ( o C ), the photophysical processes of both pyrene‐substituted compounds are completely different. The study also succeeds in modulating the luminescence species by counter cations in both solution and solid states. To the best of the current knowledge, this is the first report that anion‐based luminescent materials can show the different luminescent species not only in solution but also in the mechanochromic behaviors depending on the type of counter cations. This fundamental research on n CA demonstrates anion‐based emitters as a new platform for stimuli‐responsive materials.
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