A silver(Ⅰ) complex has been obtained from reaction of silver salt and 4-Hpytz(4-Hpytz=3,5-di(4-pyridyl)-1,2,4-triazole) by hydrothermal method.Single crystal structure reveals that it consists of a 2D coordination polymer [Ag(4-pytz)]∞(1)(4-pytz=3,5-di(4-pyridyl)-1,2,4-triazolate),which was crystallized in monoclinic crystal system and space group of P21/c,with a=0.753 64(1) nm,b=1.135 55(2) nm,c=1.291 7(2) nm,β=104.015(4)°,V=1.072 5(3) nm3,Z=4.Each Ag(Ⅰ) ion has a trigonal coordination geometry which three N atoms from two bridging pytz ligands.4-pytz shows-1 valence which lost its proton located at a triazole ring in final product.The title complex exhibits high thermal stability and decomposed at 472 ℃.Furthermore,complex 1 shows obvious luminescence with λem at 547 nm,which is ascribed to MLCT.
The reaction of Ni(CH3COO)2’6H2O, 4-hydroxycinnamic acid (Hhca) and 4,4’-bipyri- dine (bipy) ligand in water-solution afforded a mononuclear complex [Ni(H2O)4(4,4’-bipy)2](hca)2 which was characterized by IR, elemental analysis, TGA and single-crystal X-ray diffraction. X-ray crystallography analysis reveals that the complex is of triclinic, space group P1 with a = 7.0238(14), b = 7.2934(11), c = 17.186(4) ’, α = 87.073(13), β = 84.354(10), γ = 81.961(12)°, V = 866.9(3) ’3, Z = 1, Dc = 1.474 g/cm3, F(000) = 402, μ = 62.7 mm-1, R = 0.0411, wR = 0.0862 and GOF = 1.048. In solid state, the cation [Ni(H2O)4(4,4’-bpy)2]2+ connects six nearby hca counter anions via O-H···O hydrogen bonds to form an extended 2D lattice framework and the O-H…N hydrogen bonds finally link the 2D layers into an infinite 3D network.
Three Schiff bases of 3-amino-5-mercapto-1,2,4-trizaole have been synthesized:5-benzylideneamino-4H-1,2,4-trizaole-3-thiol(Ia),5-(3-phenylallylideneamino)-4H-1,2,4-triazole-3-thiol(Ib),5-((5-mercapto-4H-1,2,4-triazol-3-ylimino)methyl)quinolin-8-ol(Ic).These compounds are characterized by UV-Vis,FT-IR,HPLC,1H-NMR and elementary analysis.The fluorescence spectra of compounds is investigated.We obtained different fluorescence spectra and compared the fluorescence of raw materials to products.Results show that the fluorescence is changed correspondingly when introduce the conjugated group.
In this paper,a novel monomer(5-(4-(4-vinylbenzyloxy)phenyl)-4,5-dihydro-1,3-diphenyl-1H-pyrazole)(StODO) with strong blue emission is synthesized,and its homopolymer(Homo-PStODO)is prepared by radical polymerization.The monomer and the homopolymer are characterized by 1H-NMR,Infrared Spectrum,HPLC,elemental analysis and GPC respectively.Then,we study the fluorescence emission spectra of StODO and its polymer,and investigate the influence on fluorescence emission spectra by solution concentration and solvent polarity.The results show that they all have high fluorescent quantum yield and strong fluorescent intensity.
