Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United States.
Inorg Chem. 2013 Feb 18;52(4):2182-7. doi: 10.1021/ic3026304. Epub 2013 Feb 5.
A semirigid di-1,2,4-triazole ligand leads to formation of the MOF [Cu(2)(L)(2)(SO(4))(Br)(2)]·xH(2)O (1). The framework structure of 1 flexes reversibly upon removal or addition of water to form semihydrated ([Cu(2)(L)(2)(SO(4))(Br)(2)]·4H(2)O) and dehydrated ([Cu(2)(L)(2)(SO(4))(Br)(2)]·0H(2)O) MOFs, 1' and 1″, respectively. Single-crystal X-ray analysis demonstrated that the 2-butene subunit of the ligand rotates between two positions for 1 and 1', causing a change in the solvent-accessible volume in the framework. This double hinge within the semirigid ligand is a built-in breathing mechanism and suggests a novel approach for general synthesis of breathing MOFs.
一种半刚性的 1,2,4-三唑配体导致 MOF [Cu(2)(L)(2)(SO(4))(Br)(2)]·xH(2)O（1）的形成。1 的框架结构在可逆地去除或添加水时会弯曲，形成半水合（[Cu(2)(L)(2)(SO(4))(Br)(2)]·4H(2)O）和脱水（[Cu(2)(L)(2)(SO(4))(Br)(2)]·0H(2)O）MOFs，分别为 1'和 1″。单晶 X 射线分析表明，配体的 2-丁烯亚基在 1 和 1'之间在两个位置之间旋转，导致框架中溶剂可及体积的变化。半刚性配体中的这种双铰链是一种内置的呼吸机制，为一般呼吸 MOF 的合成提供了一种新方法。
