作者:Fei-Yan Yi、Tian-Hua Zhou、Jiang-Gao Mao
DOI:10.1016/j.molstruc.2010.11.059
日期:2011.2
Hydrothermal reactions of lead(II) salts with p-sulfophenylarsonic acid (p-HO3S-C6H4-A(5)O(3)H(2), H3L) afforded two novel lead(II) p-sulfonate-arsonates, namely, Pb-3(L)(2)(H2O)center dot H2O (1) and Pb-3(L)(2)center dot 6.5H(2)O (2). Their structures feature two different types of three-dimensional structures. In compound 1, the interconnection of Pb(II) ions by bridging arsonate and sulfonate groups results into a 20 layer parallel to the bc plane. These layers are further cross-linked by phenyl groups into a pillared-layered architecture with small voids occupied by the lattice water. Compound 2 features a 3D open framework based on 1D lead sulfonate-arsonate chains of Pb3O4 clusters along c-axis that are further cross-linked by phenyl groups, forming large tunnels along c-axis which are occupied by a number of lattice water molecules. Introduction of 2,2'-bipyridine (bipy) or 1,10-phenanthroline (phen) as the auxiliary chelating ligand into the above system led to two new mixed-ligand lead(II) sulfonate-arsonates, namely, Pb(HL)(bipy)center dot 2H(2)O (3) and Pb(HL)(phen)center dot 2H(2)O (4). Compounds 3 and 4 display a similar one-dimensional chain in which neighboring Pb2O2 units are bridged by a pair of HL2- anions. There also exists a 1D water chain in compound 3. All four compounds display strong fluorescent emission bands in the green or red light region. (C) 2010 Elsevier B.V. All rights reserved.