期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 11, 页码 2857-2861出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201309458
关键词
bis(triarylamine); cations; radicals; substituent effects; triplet state
资金
- National Natural Science Foundation of China [91122019, 21171087, 21021062]
- Natural Science Foundation of Jiangsu Province [BK2011549]
Three bis(triarylamine) dications were isolated by using weakly coordinating anions. Their electronic structures in the ground state were investigated by various experiments in conjunction with theoretical calculations. The ground-state electronic structures of these species were tunable by substituent effects, with two of them as closed-shell singlets and one of them as an open-shell singlet in the solid state. The excited state of the latter is thermally accessible, indicated by EPR and SQUID measurements. The work provides a new and stable diradicaloid structure motif with an excited triplet sate.
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