期刊
DALTON TRANSACTIONS
卷 49, 期 8, 页码 2431-2436出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt00094a
关键词
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资金
- Institute for Chemical Reaction Design and Discovery (ICReDD)
- Northern Advancement Center for Science & Technology of Hokkaido Japan
- [17K14467]
- [19H04556]
- [18H04497]
- [18H02041]
Herein the aggregation-induced emission (AIE) of a Tb(III) complex is reported for the first time. The Tb(III) complex is composed of three anionic ligands (acac: acetylacetonate) and one large hetero-pi-conjugated neutral ligand (dpq: dipyrido[3,2-f:2',3'-h]quinoxaline). The formation of a crystalline J-aggregate of the Tb(III) complex (CJ-Tb(III)) was characterized by X-ray crystal structure analysis and absorption spectra. A crystalline H-aggregate (CH-Tb(III)) was also prepared using the ligand steric effect (tmh: 2,2,6,6-tetramethyl-3,5-heptanedionate). The emission and AIE properties of CJ-Tb(III) were evaluated using emission spectra, lifetime, and quantum yields, whereas CH-Tb(III) did not emit photons. Density functional theory calculations predict that the AIE originates from the modulation of ligand-to-ligand charge transfer bands through J-aggregation.
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