title: Poly[mu2-4,4'-bipyridine-di-mu2-bromido-cadmium(II)], with novel colour-tunable fluorescence.
abstract: The title inorganic-organic hybrid complex, [CdBr2(C(10)H(8)N(2))]n, features two-dimensional [CdBr2(4,4'-bipy)]n (4,4'-bipy is 4,4'-bipyridine) neutral networks, based on the octahedral Cd atom coordinated by four mu2-Br and two mu2-4,4'-bipy at trans positions, yielding a CdBr(4)N(2) octahedron. It crystallizes in the orthorhombic system (Cmmm). All the crystallographically independent atoms are on special positions, namely Cd on mmm, Br on mm, N on mm2, and C on sites of symmetry m or mm2. Optical absorption spectroscopy reveals the presence of an optical gap of 3.76 eV, indicating that the complex is a wide-gap semiconductor. Photoluminescence investigation reveals that the complex displays strong colour-tunable emissions, which might originate from a ligand-to-ligand charge-transfer (LLCT) transition. Thermogravimetric differential thermal analysis shows that the complex is thermally stable up to 493 K.
authors.affiliation: College of Chemistry and Chemical Engineering, JiangXi Province Key Laboratory of Coordination Chemistry, JingGangShan University, 343009 Ji'an, JiangXi, People's Republic of China. wtchen@jgsu.edu.cn
authors.forename: Wen Tong
authors.initials: WT
authors.lastname: Chen
authors.forename: Xiao Niu
authors.initials: XN
authors.lastname: Fang
authors.forename: Qiu Yan
authors.initials: QY
authors.lastname: Luo
authors.forename: Ya Ping
authors.initials: YP
authors.lastname: Xu
authors.forename: Yan Ping
authors.initials: YP
authors.lastname: Duan
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry*; D001965:Bromides / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D001965:Bromides; D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; C524193:poly(mu(2)-4,4'-bipyridine-di-mu(2)-bromidocadmium(II)); D002104:Cadmium; D015082:2,2'-Dipyridyl