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A new mononuclear Co(II) complex, [Co(hmz)2(H2O)4]·2H2O, has been synthesized by the reaction of Co(CH3COO)2·4H2O with 1-(4-hydroxyphenyl)-5-mercaptotetrazole (Hhmz). It crystallizes in the monoclinic system, space group P21/n with a = 13.502(5), b = 6.718(3), c = 13.972(6) , β = 117.532(4)o, V = 1123.9(8) 3, Z = 2, M r = 553.45, F(000) = 570, Dc = 1.635 g/cm3, μ = 1.008 mm–1, the final R = 0.0272 and wR = 0.0684 for 2194 observed reflections (I > 2σ(I)). The Co(II) is six-coordinated by two nitrogen atoms from two hmz–1 ligands and four water molecules, forming an octahedral geometry. The intermolecular hydrogen bonding and offset-panel π-π stacking interactions between the adjacent molecules extend the compound into a three- dimensional supramolecular framework. The title compound emits strong blue fluorescent light (λem(max) = 427 nm) at room temperature and is red-shifted compared with free ligand Hhmz (λem(max) = 342 nm).
A new mononuclear Co (II) complex, [Co (hmz) 2 (H2O) 4] 2H2O, has been synthesized by the reaction of Co (CH3COO) 2.4H2O with 1- (4- hydroxyphenyl) -5-mercaptotetrazole Hhmz. It crystallizes in the monoclinic system, space group P21 / n with a = 13.502 (5), b = 6.718 (3), c = 13.972 (6) The final R = 0.0272 and the wR = 0.0684 for 2194 observed reflections (I), Z = 2, M r = 553.45, F (000) = 570, Dc = 1.635 g / cm3, μ = 1.008 mm- > 2σ (I)). The Co (II) is six-coordinated by two nitrogen atoms from two hmz-1 ligands and four water molecules, forming an octahedral geometry. The intermolecular hydrogen bonding and offset-panel π-π stacking interactions between the title molecules extend the compound into a three-dimensional supramolecular framework. The title compound emits strong blue fluorescent light (λem (max) = 427 nm) at room temperature and is red- shifted compared with free ligand Hhmz (λem 342 nm).