Synthesis,Photochromism and Crystal Structure of 1-(2-Cyano-1,5-dimethyl-4-pyrryl)-2-[2-methyl-5-(3-

• 作 者: 崔士强 刘刚 范丛斌 蒲守智
• 机 构: Jiangxi Key Laboratory of Organic Chemistry,Jiangxi Science & Technology Normal University,
• 出 处: 结构化学
• 发表日期: 2013年11期
• 关键词: hexane irradiation cyano methyl-5 pyridyl triclinic belongs visible substituted

A new family of photochromic diarylethene compounds,1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-[2-methyl-5-(3-pyridyl)-3-thienyl]perfluorocyclopentene(1o)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 P1 with a=8.897(7),b=10.139(8),c=12.361(9),α=85.222(7),β=75.439(7),γ=78.736(8)o,Z=2,V=1057.8(14)3,Dc=1.468 mg/m3,μ=0.220 mm-1,F(000)=476,the final R=0.0608 and wR=0.1754 for 3199 observed reflections(I>2(I)).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.

A new family of photochromic diarylethene compounds, 1- (2-cyano-1,5-dimethyl-4-pyrryl) -2- [2- 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 P1 with a = 8.897 (7), b = 10.139 (8), c = 12.361 (9) α = 85.222 (7) β = 75.439 (7) γ = 78.736 (8) o Z = 2 V = 1057.8 (14) 3 Dc = 1.468 mg / m3 μ = 0.220 mm- 1, F (000) = 476, the final R = 0.0608 and wR = 0.1754 for 3199 observed reflections (I> 2 (I)). Interestingly, compound 1 exhibits good photochromic properties with an alternate irradiation of UV light and visible light (> 510 nm) to form two photoisomers in hexane solution and crystal phase.