弱相互作用在超分子自组装中的应用.doc

Synthesis, Crystal Structure and Property of Two Supramolecules Assembled from Weak Interactions WEI Hao(韦昊) WU Gang(吴刚) * LIU Zhen-Feng(刘振锋) (Department of Chemistry and Life Science, Chu Zhou University, Chu Zhou 239012) ABSTRACT Two complexes, [Cu2(Htdb)4(H2O)2] (1), [Cd(bipy)2(Hmcmbc)2] (2), (H2tdb = 2,2-thiodibenzoic acid; H2mcmbc = m-(carboxyl-methyloxy)-benzenecarboxylic acid; bipy = 4,4?-Bipyridine ) have been prepared, and were characterized by elemental analysis, FT-IR and single-crystal X-ray diffraction. Structures indicate that complex 1 is a single molecule, and 2 is a one-dimensional chain. Their two-dimensional and three-dimensional frameworks are constructed through hydrogen bonding, π···π or C-H···π stacking et al weak interactions. The cyclic voltametric behavior of complex 1 and luminescence property of complex 2 were investigated. 1 belongs to the triclinic system, space group P-1 with a = 7.8607(6), b = 11.7619(9), c = 15.3481(12) ?, α = 109.3670(10), β = 92.4420(10), γ = 92.0450(10)° , V = 1335.65(18) ?3, Mr = 1256.26, Dc = 1.5619(2) g/cm3, F(000) = 642, μ = 1.029 mm–1, Z = 1, the final R = 0.0289 and wR = 0.0763 for 5199 observed reflections with I 2σ(I). Complex 2 crystallizes in triclinic, space group P-1 with a = 9.6378(10), b = 9.7508(10), c = 19.055(2) ?, α = 88.7020(10), β = 80.5260(10), γ = 69.2000(10)o, V =1649.9(3) ?3, Mr = 815.07, Dc = 1.641 g/cm3, μ = 0.732 mm?1, F(000) = 828, Z = 2, the final R = 0.0511 and wR = 0.1149 for 4729 observed reflections (I 2σ(I)). Keywords: hydrogen bond, C-H···π interaction, cyclic voltammetry 1. INTRODUCTION Metal-organic coordination compounds have drawn great research interest in recent years because of their potential applications in molecular adsorption and separation processes[1 - 3], ion exchange [4], catalysis[5, 6] and sensor technology [7, 8]. The assembly reaction between a suitable transition metal and a ligand with rich coordination chemistry, donor or acceptor of hydrogen bon