title: New mercury-contained cationic frameworks stabilized by (GaCl4)- unit via weak electrostatic forces in supramolecular compounds (Hg11P4)(GaCl4)4 and (Hg3AsS)(GaCl4).
abstract: Two new inorganic supramolecular compounds, (Hg11P4)(GaCl4)4 (1) and (Hg3AsS)(GaCl4) (2), have been prepared by the solid-state reactions. Their structures are characterized by mercury-containing cationic hosts and discrete (GaCl4)(-) guests, which is a derivative of a very strong Lewis acid. The three-dimensional cationic framework of 1, (Hg11P4)(4+), is marvellously extended by Hg2(2+) and Hg3(2+) groups as well as Hg(2+) ions to form two large tunnels with different sizes each embedded with two columns of (GaCl4)(-) anions. Compound 2 features a layered structure with (GaCl4)(-) tetrahedra being intercalated between two-dimensional (Hg3AsS)(+) layers and it is the first mercury pnictidechalcohalide. It is found that the weak electrostatic forces between hosts and guests play a key role in the stabilization of the whole structures of 1 and 2, which is strikingly different from almost all the reported metal pnictidehalide and chalcohalide supramolecular compounds. Optical dielectric constants calculations show that both 1 and 2 possess strong dielectric anisotropy.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China. gcguo@fjirsm.ac.cn.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Jiang
authors.forename: Xiao-Guo
authors.initials: XG
authors.lastname: Li
authors.forename: Yu-Hang
authors.initials: YH
authors.lastname: Fan
authors.forename: Bin-Wen
authors.initials: BW
authors.lastname: Liu
authors.forename: Hui-Yi
authors.initials: HY
authors.lastname: Zeng
authors.forename: Guo-Cong
authors.initials: GC
authors.lastname: Guo