Aggregation-induced emission active thermally-activated delayed fluorescence materials possessing N-heterocycle and sulfonyl groups
Aggregation-induced emission active thermally-activated delayed fluorescence materials possessing N-heterocycle and sulfonyl groups
复制标题
具有N-杂环和磺酰基的聚集诱导发射活性热激活延迟荧光材料
DOI：
10.1039/d1tc05196b
复制
发表时间：
2022
影响因子：
6.4
通讯作者：
Ikeda Hiroshi
中科院分区：
文献类型：
--
作者：
Matsui Yasunori;Yokoyama Yudai;Ogaki Takuya;Ishiharaguchi Kenta;Niwa Akitsugu;Ohta Eisuke;Saigo Masaki;Miyata Kiyoshi;Onda Ken;Naito Hiroyoshi;Ikeda Hiroshi
合成了具有N-杂环和芳磺酰基的新型热激活延迟荧光(TADF)材料2JC2Sb和2Mi2Sb，并对其在溶液和固体中的光物理性质进行了表征。2JC2Sb和2Mi2Sb表现出典型的TADF特性和聚集诱导发射或结晶诱导发射行为。具体地说，由于抑制了热失活，它们在聚集体和固体中表现出光致发光波长的蓝移和光致发光量子产率(ΦPL)的增加。时间分辨红外光谱分析的结果表明，聚集体和固体促进了激发态几何变化的抑制，导致了Φ发光的增加。
Novel thermally-activated delayed fluorescence (TADF) materials 2Cz2SB and 2Mi2SB, possessing N-heterocycle and arylsulfonyl groups, were synthesized and their photophysical properties in solution and the solid state were characterized. 2Cz2SB and 2Mi2SB exhibit typical TADF characteristics and aggregation-induced emission or crystallization-induced emission behaviour. Specifically, they display a blueshift of photoluminescence wavelength and an increase in photoluminescence quantum yield (ΦPL) in the aggregate and solid states, owing to suppression of thermal deactivation. The results of time-resolved IR analysis suggest that aggregate and solid state promoted suppression of geometrical changes in the excited state causes the observed increases in ΦPL.