一个新颖的光磁性二噻吩乙烯铜配合物的合成和光致变色性质(英文)

Synthesis and Photochromism of a Novel Photomagnetic Copper(Ⅱ) Complex with Dithienylethene Ligand

合成了一个新颖的金属铜和1,2-双(2′-甲基-5′-(4″-吡啶基)-3′-噻吩)全氟代环戊烯(BM-4-PTP)配合物,并用红外、核磁共振、元素分析进行了表征。研究了配合物在晶体相的光致变色性质和磁性性质。在光激发下,配合物[Cu(BM-4-PTP)2(CF3COO)2](THF)2(H2O)2(1)在晶体相显示出可逆的光异构反应。有趣的是,伴随着光致变色反应,配合物1的开环体(1o)和闭环体(1c)在晶体相还显示出磁性差异,1o和1c的磁化率可逆地发生变化,说明由于开环异构体和闭环异构体的π共轭结构不同,通过配体BM-4-PTP桥联的铜离子之间的相互作用可以被光引发。

One novel copper complex with 1,2-bis（2′-methyl-5′-（4″-pyridyl）-3′_thienyl） perfluorocyclopentene （BM- 4-PTP） was synthesized and characterized by IR, NMR and elemental analysis. The photochtomic and magnetic properties of the copper complex were examined in crystalline state. Upon photoirradiation, [Cu（BM-4-PTP）2 （CF3COO）2]（THF）2（H2O）2 （1） displayed reversible photoisomerization in crystalline phase. Interestingly, complex 1 also showed reversible photomagnetism between open-form （lo） and closed-form （1c） accompanying the photochromic reaction in crystalline phase. The magnetic susceptibilities of lo and 1c reversibly changed indicated the coppercopper interaction through the bridging BM-4-TTP is switched upon photoexcitation due to the different π- conjugated bond structures between the open and closed isomers.