Synthesis,Photochromism and Crystal Structure of 1-(2-Cyano-l,5-dimethyl-4-pyrryl)-2- [2-methyl-5- (3-pyridyl)-3-thienyl]perfluorocyclopentene |
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作者姓名: | CUI Shi-Qiang LIU Gang FAN Cong-Bin PU Shou-Zhi |
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作者单位: | Jiangxi Key Laboratory of Organic Chemistry,Jiangxi Science & Technology Normal University, Nanchang 330013, China |
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基金项目: | Supported by the NNSFC (21262015, 21162011 ), Science Funds of the Education Office of Jimlgxi Province (G J J11690, GJJ 13577) |
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摘 要: | A new family of photochromic diarylethene compounds, 1-(2-cyano-l,5-dimethyl- 4-pyrryl)-2-2-methyl-5-(3-pyridyl)-3-thienyl]perfluorocyclopentene (lo) having an unsymmetrical pyrryl and thienyl substituted hexafluorocyclopentene unit, was synthesized and its structure was determined by X-ray analysis. The crystal belongs to triclinic system, space group PI with a = 8.897(7), b = 10.139(8), c = 12.361(9) A, α = 85.222(7), ρ = 75.439(7), γ = 78.736(8)°, Z = 2, V= 1057.8(14) A3, D,.= 1.468 mg/m3, p = 0.220 mm-1, F(000) = 476, the final R = 0.0608 and wR = 0.1754 for 3199 observed reflections (1 〉20(/)). Interestingly, compound 1 exhibits good photochromic properties with alternate irradiation of UV light and visible light (〉 510 nm) to form two photoisomers in hexane solution and crystal phase.
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关 键 词: | 晶体结构 光致变色 吡咯基 噻吩基 二甲基 吡啶基 环戊烯 全氟 |
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