Temperature Induced Interpenetration Suppression of a Couple of Azo-based Isomers with a Flexible Second Ligand  

作　　者：郭金双 徐刚 郭国聪 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou,Fujian 350002,China [2]Graduate School,Chinese Academy of Sciences,Beijing 100039,China

出　　处：《Chinese Journal of Chemistry》2012年第4期791-797,共7页中国化学（英文版）

摘　　要：Two new azo-based coordination compounds with a flexible second ligand, crystal 1 （composed with [Zn（adc）（eda）],-1） and crystal 2 （composed with {[Zn（adc）]0.9568（eda）}n-1＇ and {[Zn（adc）]0.0414},） have been synthe- sized as a couple of isomers with different reaction temperature. Adc2- and eda represent azobenzene-4,4＇-dicar- boxylic ion and 1,2-ethanediamine, respectively. Single crystal X-ray diffraction measurement indicates the inter- penetration of the above crystals could be suppressed by simply tuning the reaction temperature, that is, the 5-fold interpenetration which leads to no free volume left in lower temperature synthesized compound [Zn（adc）（eda）]n-1 could be reduced to a 4-fold interpenetration in higher temperature synthesized {[Zn（adc）]o.9568（eda）},-l＇ which re- sults in free volume accounting for 3.6% （3 1.6 A3 per unit cell volume） in crystal 2. The synthesis, crystal structure and fluorescence spectra of crystals 1 and 2 have been discussed, together with the data of elemental analysis and X-ray powder diffraction.Two new azo-based coordination compounds with a flexible second ligand, crystal 1 （composed with [Zn（adc）（eda）],-1） and crystal 2 （composed with {[Zn（adc）]0.9568（eda）}n-1＇ and {[Zn（adc）]0.0414},） have been synthe- sized as a couple of isomers with different reaction temperature. Adc2- and eda represent azobenzene-4,4＇-dicar- boxylic ion and 1,2-ethanediamine, respectively. Single crystal X-ray diffraction measurement indicates the inter- penetration of the above crystals could be suppressed by simply tuning the reaction temperature, that is, the 5-fold interpenetration which leads to no free volume left in lower temperature synthesized compound [Zn（adc）（eda）]n-1 could be reduced to a 4-fold interpenetration in higher temperature synthesized {[Zn（adc）]o.9568（eda）},-l＇ which re- sults in free volume accounting for 3.6% （3 1.6 A3 per unit cell volume） in crystal 2. The synthesis, crystal structure and fluorescence spectra of crystals 1 and 2 have been discussed, together with the data of elemental analysis and X-ray powder diffraction.

关 键 词：coordination polymer interpenetration suppression ISOMER temperature dependence 

分 类 号：O621.142[理学—有机化学] TQ028.8[理学—化学]