Anion-dependent assembly of diverse 1D-3D silver(I) coordination networks with a thioether ligand

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• 作者：Hangxing Xiong^a ; Li Li^a ; E Liu^a ; Chengxiong Yang^a ; Yuan Zhuo Zhang^b ; James C. Fettinger^c ; Guoqi Zhang^b ; ^{guzhang@jjay.cuny.edu}
• 关键词：Thioether ; Silver ; Anion effect ; Coordination network ; Crystal structure
• 刊名：Polyhedron
• 出版年：2017
• 出版时间：17 February 2017
• 年：2017
• 卷：123
• 期：Complete
• 页码：226-233
• 全文大小：1629 K
• 卷排序：123

文摘

A flexible thioether ligand, 1,3-bis(methylthiomethyl)benzene (L) has been employed to prepare supramolecular assemblies with silver salts of various anions such as NO3−, BF4−, PF6− and SbF6−. X-ray structural analysis reveals that even though the same metal ion (Ag+) and ligand (L) were used to react under the same conditions, anions have played a critical role in driving the variation of metal–ligand binding modes as well as network topologies of the resultant coordination polymers. The reaction of L with silver nitrate resulted in a 2-D coordination network 1, composed of metallomacrocycles bridged with NO3− ions. A 3-D framework 2 was observed when silver tetrafluoroborate was used. Although BF4− ions were not involved in coordinating with metal centers, the participation of water molecules led to a different metal–ligand binding mode and hence the formation of a network with higher dimension. The large, non-coordinating anion PF6− was found to be responsible for the assembly of a 2-D grid-like network 3, in which interesting 4+4 metallocycles occupied with PF6− ions were disclosed. However, the presence of a larger anion analog, SbF6− simplified the network structure to form a 1-D helical chain (4) through the coordination of solvent molecules (CH3CN) with silver(I) centers.