期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 45, 页码 16264-16272出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b08592
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB834701, 2013CB834702]
- University Grants Committee of Hong Kong [AoE/P-03/08]
- Research Grants Council of Hong Kong [16301614, 16305015, C2014-15G, A-HKUST60.5116, NHKUST604/14]
- Innovation and Technology Commission [ITC-CNERC14SC01, TCPD/17-9]
- Guangdong Innovative Research Team Program of China [201101C0105067115]
- Science and Technology Plan of Shenzhen [JCYJ 20160229205601482]
- Shenzhen Peacock Plan
pi-Bonds connected with aromatic rings were generally believed as the standard structures for constructing highly efficient fluorophores. Materials without these typical structures, however, exhibited only low fluorescence quantum yields and emitted in the ultraviolet spectral region. In this work, three molecules, namely bis(2,4,5-trimethylphenyl)methane, 1,1,2,2-tetrakis(2,4,5-trimethylphenyl)ethane, and 1,1,2,2-tetraphenylethane, with nonconjugated structures and isolated phenyl rings were synthesized and their photophysical properties were systematically investigated. Interestingly, the emission spectra of these three molecules could be well extended to 600 nm with high solid-state quantum yields of up to 70%. Experimental and theoretical analyses proved that intramolecular through space conjugation between the isolated phenyl rings played an important role for this abnormal phenomenon.
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