Coordinated anion exchange induced structural transformation from a trinuclear cage to a 3D interpenetrated framework with the solvent-mediated mechanism

作者：Lu Huijuan; Mu Yajuan; Li Jinpeng^*; Wu Dongqing; Hou Hongwei; Fan Yaoting

来源：Inorganica Chimica Acta, 2012, 387: 450-454.

DOI：10.1016/j.ica.2012.01.022

• Anion exchange
• Cadmium complex
• Crystal structure
• Recrystallization process

Reaction of methylene-bis(1,1'-benzimidazole) (mbbz) with CdI2 produces a complex [Cd(mbbz)I-2](3) (1) containing the soft coordinated I anions, which shows a trinuclear cage-like structure. Immersing complex 1 into the aqueous solution of NaN3, we obtained the exchanged product [Cd(mbbz)(2)(N-3)(2)](n) (2). The single-crystal X-ray diffraction shows that complex 2 presents a 3D 2-fold interpenetrating 4-connected framework with 6(6)-dia topology. The results indicate that the soft coordinated I anions can be completely exchanged by borderline N-3 anions, simultaneously, accompanying the structural transformation from a trinuclear cage to a 3D framework. Furthermore, the AFM and EDS data reveal that the exchange is a recrystallization process with solvent-mediated mechanism.

• 出版日期2012-5-30
• 单位郑州大学