940942-28-9Relevant articles and documents
Metal-organic frameworks built from achiral cyclohex-1-ene-1,2- dicarboxylate: Syntheses, structures and photoluminescence properties
Gong, Yun,Wu, Tao,Lin, Jianhua,Wang, Baoshan
, p. 5649 - 5656 (2013/03/13)
Using achiral ligand cyclohex-1-ene-1,2-dicarboxylic acid (H2L), in the presence or absence of N-donor coligands, five metal(ii) complexes formulated as Zn(L)(4,4′-bpy)·H2O (1), Cu(L)(4,4′-bpy)0.5 (2), Cd2(L)2(phen) 2(H2O)2·3H2O (3), Zn 5(L)4(μ3-OH)2(H 2O)2 (4) and Cd(L)(H2O) (5) have been synthesized and structurally characterized by single-crystal X-ray diffractions. Complex 1 shows a homochiral network based on novel twisted hexanuclear cyclic units, which are fused by sharing metal ions into a 3D framework. Complex 2 exhibits a 2D framework constructed by 1D chain linked by 4,4′-bpy. 4,4′-bpy exhibits twisted and planar conformations in complexes 1 and 2. In complex 3, alternating 1D left-handed and right-handed helical chains are observed. Complexes 4 and 5 display different 2D frameworks based on a Zn 5 unit and Cd-O-Cd infinite linkage, respectively. Complex 1 shows a strong CD signal, and complexes 4-5 are achiral. The twisted 4,4-bpy plays an important role in the formation of the chiral complex 1. The five complexes show different absorption and photoluminescence properties as well as different thermal stabilities.
