期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 42, 页码 15142-15150出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b08333
关键词
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资金
- UGC
- URC Strategic Research Theme on New Materials of The University of Hong Kong
- French National Research Agency (ANR)/Research Grants Council (RGC) Joint Research Scheme [A-HKU704/12]
- Research Grants Council (RGC) General Research Fund (GRF) of the Hong Kong Special Administrative Region, P. R. China [HKU 17305614]
- University Grants Committee (UGC) Areas of Excellence Scheme [AoE/P-03/08]
- University of Hong Kong
A series of novel photochromic thieno[3,2-b]phosphole oxides has been shown to demonstrate photochromism without the need for the use of high-energy ultraviolet (UV) light irradiation while maintaining promising photochromic properties such as excellent thermal irreversibility, robust fatigue resistance, and high photoswitching efficiency. Promising visible light-induced photochromic properties have been realized by the new molecular design, in which various pi systems have been incorporated into the weakly aromatic phosphole backbone instead of the conventional modification of the peripheral diaryl units that usually leads to a drastic reduction of the photochromic quantum yields (phi o -> c,and phi o -> c < 0.01) or even a loss of the photochromic behavior. Excellent fatigue resistance has been observed for a representative compound with no apparent loss of photochromic reactivity over ten photochromic cycles by alternate irradiation with violet (ca. 410 nm) and green (ca. 500 nm) light with high photochromic quantum yields (phi o -> c = 0.87 and phi o -> c = 0.44), rendering it a new promising candidate as visible light photoswitches for various potential applications.
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