Syntheses, structures, and fluorescence properties of cadmium(II) and zinc(II) complexes based on 1,1′-binaphthalenyl-2,2′-diamine-N,N,N′,N′-tetraacetic acid
摘要:
Solvothermal reaction of Cd(II)/Zn(II) salts with 1,1'-binaphthaleny1-2,2'-diamine-N,N,N',N'-tetraacetic acid (H4L) ligand results in the formation of five interesting complexes [Cd-2(L)(phen)(2)(H2O)]center dot 2H(2)O (1), [Cd-4(L)(2)(phen)(2)(H2O)7]center dot CH3OH center dot 10H(2)O (2), ([Cd-5(L)(2)(H2O)(3)(OH)(2)]center dot H2O)n (3), [Zn-2(L)(phen)(2)(H2O)]center dot 2H(2)O (4) and {[Zn-2(L)(H2O)(4)]center dot 2.25H(2)O}(n) (5), where phen = 1,10-phenanthroline. The structure of 1 is dinuclear, and that of 2 is tetranuclear. The structural difference of 1 and 2 indicates a temperature-dependence of the formation of two complexes. 3 Is a 20 polymer with a (6,3) network constructed by a novel asymmetrical pentanuclear Cd clusters with bridging hydroxyl and carboxylate groups as secondary building units, which have never been employed before in the construction of 2D networks. 4 Is a dinuclear compound with a structure similar to that of 1. Complex 5 exhibits a zigzag chain structure bridged by L4- ligand. A variety of coordination modes of the H4L, ligand were found, some of them are unprecedented for these type of compounds. The fluorescence properties of the compounds were studied, and strong fluorescent emissions were observed. (C) 2012 Elsevier Ltd. All rights reserved.
Syntheses, structures, and fluorescence properties of cadmium(II) and zinc(II) complexes based on 1,1′-binaphthalenyl-2,2′-diamine-N,N,N′,N′-tetraacetic acid
Solvothermal reaction of Cd(II)/Zn(II) salts with 1,1'-binaphthaleny1-2,2'-diamine-N,N,N',N'-tetraacetic acid (H4L) ligand results in the formation of five interesting complexes [Cd-2(L)(phen)(2)(H2O)]center dot 2H(2)O (1), [Cd-4(L)(2)(phen)(2)(H2O)7]center dot CH3OH center dot 10H(2)O (2), ([Cd-5(L)(2)(H2O)(3)(OH)(2)]center dot H2O)n (3), [Zn-2(L)(phen)(2)(H2O)]center dot 2H(2)O (4) and [Zn-2(L)(H2O)(4)]center dot 2.25H(2)O}(n) (5), where phen = 1,10-phenanthroline. The structure of 1 is dinuclear, and that of 2 is tetranuclear. The structural difference of 1 and 2 indicates a temperature-dependence of the formation of two complexes. 3 Is a 20 polymer with a (6,3) network constructed by a novel asymmetrical pentanuclear Cd clusters with bridging hydroxyl and carboxylate groups as secondary building units, which have never been employed before in the construction of 2D networks. 4 Is a dinuclear compound with a structure similar to that of 1. Complex 5 exhibits a zigzag chain structure bridged by L4- ligand. A variety of coordination modes of the H4L, ligand were found, some of them are unprecedented for these type of compounds. The fluorescence properties of the compounds were studied, and strong fluorescent emissions were observed. (C) 2012 Elsevier Ltd. All rights reserved.
Structural diversity and magnetic properties of a series of transition metal complexes based on 1,1′-binaphthalenyl-2,2′-diamine-N,N,N′,N′-tetraacetic acid
Abstract Five complexes, [Mn2(L)(H2O)5]·3H2O (1), [Fe(L)](Et3N+H) (2), [Co2(L)(H2O)4]·2.25H2O}n (3), [Ni2(L)(H2O)4]·2H2O}n (4) and [CuNa2(L)(H2O)5]·H2O}n (5), have been synthesized by self-assembly of a N-containing polycarboxylic acidligand H4L and corresponding metal salts, H4L = 1,1′-binaphthalenyl-2,2′-diamine-N,N,N′,N′-tetraaceticacid. Interestingly, complexes 1–5 display a structural variation