Synthesis and Characterization of a Manganese(II) Coordination Compound with Two-dimensional Layer Structure: {[Mn2(IP)2(1,4-bdc)2]•H2O}n

A new complex {[Mn-2(IP)(2)(1,4-bdc)(2)]center dot H2O}(n)(1) (IP = 1H-imidazo [4,5-f] [1,10]-phenanthroline, 1,4-H(2)bdc = 1,4-benzendicarboxylic acid), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in monoclinic, space group C-c with a = 20.326(2), b = 24.249(2), c = 7.621(1) angstrom, beta = 108.546(6), V = 3561.2(7) angstrom(3), Z = 4, D-c = 1.672 g/cm(3), mu = 0.785 mm(-1), F(000) = 1824, S = 1.067, the final R = 0.0299 and wR = 0.0752. Compound 1 possesses a 2D structural motif, in which two crystallographically independent 1,4-bdc dianions adopt the alternative mode of mixed bis(bidentate) and mono dentate-bidentate coordination modes to bridge neighboring Mn(II) centers. And the 2D layers are linked up by hydrogen bonding and pi center dot center dot center dot pi stacking interactions to form a 3D network. The title compound has good thermal stability and exhibits photoluminescent emission maximum at 518 nm.