title: C(3i)-symmetric octanuclear cadmium cages: double-anion-templated synthesis, formation mechanism, and properties.
abstract: A series of C(3i)-symmetric bicapped trigonal antiprismatic Cd(8) cages [2X@Cd(8)L(6)(H(2)O)(6)]⋅n Y⋅solvents (X = Cl(-), Y = NO(3)(-), n = 2: MOCC-4; X = Br(-), Y = NO(3)(-), n = 2: MOCC-5; X = NO(3)(-), Y = NO(3)(-), n = 2: MOCC-6; X = NO(3)(-), Y = BF(4)(-), n = 2: MOCC-7; X = NO(3)(-), Y = ClO(4)(-), n = 2: MOCC-8; X = CO(3)(2-), n = 0: MOCC-9), doubly anion templated by different anions, were solvothermally synthesized by means of a flexible ligand. Interestingly, the CO(3)(2-) template for MOCC-9 was generated in situ by two-step decomposition of DMF solvent. For other MOCCs, spherical or trigonal monovalent anions could also play the role of template in their formation. The template abilities of these anions in the formation of the cages were experimentally studied and are discussed for the first time. Anion exchange of MOCC-8 was carried out and showed anion-size selectivity. All of the cage-like compounds emit strong luminescence at room temperature.
authors.affiliation: Key Lab for Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Sun
authors.forename: Di
authors.initials: D
authors.lastname: Sun
authors.forename: Shuai
authors.initials: S
authors.lastname: Yuan
authors.forename: Dongxu
authors.initials: D
authors.lastname: Tian
authors.forename: Liangliang
authors.initials: L
authors.lastname: Zhang
authors.forename: Xingpo
authors.initials: X
authors.lastname: Wang
authors.forename: Daofeng
authors.initials: D
authors.lastname: Sun
mesh_terms: D000838:Anions / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D049449:Luminescence; D046911:Macromolecular Substances / Q000138:chemical synthesis* / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D013696:Temperature
chemical_list: D000838:Anions; D008024:Ligands; D046911:Macromolecular Substances; D009942:Organometallic Compounds; D002104:Cadmium