Effect of Phenolic Substituent Position in Boron Complexes of Imidazo[1,5‐a]pyridine
Effect of Phenolic Substituent Position in Boron Complexes of Imidazo[1,5‐a]pyridine
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咪唑并[1,5-a]吡啶硼配合物中酚取代基位置的影响
DOI：
10.1002/ajoc.202200040
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发表时间：
2022
影响因子：
2.7
通讯作者：
Imada Yasushi
中科院分区：
文献类型：
--
作者：
Yagishita Fumitoshi;Hoshi Keita;Mukai Shoma;Kinouchi Takashi;Katayama Tetsuro;Yoshida Yasushi;Minagawa Keiji;Furube Akihiro;Imada Yasushi
我们合成了两种3-(邻羟基苯基)咪唑并[1，5-a]吡啶的硼络合物，它们在溶液中都有蓝光发射。配合物及其1-(邻羟基苯基)取代异构体的瞬时吸收和理论研究表明，咪唑并[1，5-a]吡啶的硼配合物中酚基取代位置影响了光致发光中的激发态动力学。虽然在硼配合物的1-位引入酚基取代基能有效地实现强发射，但在3位取代基的引入会导致发光量子产率从单重态跃迁到三重态的系间跃迁而降低。
We have synthesized two boron complexes of 3‐(o‐hydroxyphenyl)imidazo[1,5‐a]pyridine exhibiting blue emission in solution. The transient absorption and theoretical studies of the complexes and their 1‐(o‐hydroxyphenyl) substituted isomers revealed that the phenolic substituent position in boron complex of imidazo[1,5‐a]pyridine affected the excites state dynamics involved in photoluminescence (PL). Although the introduction of phenolic substituent at 1‐position of the boron complex is effective to achieve the strong emission, the introduction of phenolic substituent at 3‐position results in the decreasing PL quantum yield due to intersystem crossing from the singlet excited state to the triplet excited state.