title: Electrical conductivity and luminescence in coordination polymers based on copper(I)-halides and sulfur-pyrimidine ligands.
abstract: The solvothermal reactions between pyrimidinedisulfide (pym(2)S(2)) and CuI or CuBr(2) in CH(2)Cl(2):CH(3)CN lead to the formation of [Cu(11)I(7)(pymS)(4)](n) (pymSH = pyrimidine-2(1H)-thione) (1) and the dimer [Cu(II)(μ-Br)(Br)L](2) (L = 2-(pyrimidin-2-ylamino)-1,3-thiazole-4-carbaldehyde) (2). In the later reaction, there is an in situ S-S, S-C(sp(2)), and C(sp(2))-N multiple bond cleavage of the pyrimidinedisulfide resulting in the formation of 2-(pyrimidin-2-ylamino)-1,3-thiazole-4-carbaldehyde. Interestingly, similar reactions carried out just with a change in the solvent (H(2)O:CH(3)CN instead of CH(2)Cl(2):CH(3)CN) give rise to the formation of coordination polymers with rather different architectures. Thus, the reaction between pym(2)S(2) and CuI leads to the formation of [Cu(3)I(pymS)(2)](n) (3) and [CuI(pym(2)S(3))] (pym(2)S(3) = pyrimidiltrisulfide) (4), while [Cu(3)Br(pymS)(2)](n) (5) is isolated in the reaction with CuBr(2). Finally, the solvothermal reactions between CuI and pyrimidine-2-thione (pymSH) in CH(2)Cl(2):CH(3)CN at different ratios, 1:1 or 2:1, give the polymers [Cu(2)I(2)(pymSH)(2)](n) (6) and [Cu(2)I(2)(pymSH)](n) (7), respectively. The structure of the new compounds has been determined by X-ray diffraction. The studies of the physical properties of the novel coordination polymers reveal that compounds 3 and 5 present excellent electrical conductivity values at room temperature, while compounds 1, 3, and 5-7 show luminescent strong red emission at room temperature.
authors.affiliation: Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: Almudena
authors.initials: A
authors.lastname: Gallego
authors.forename: Oscar
authors.initials: O
authors.lastname: Castillo
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Gómez-García
authors.forename: Félix
authors.initials: F
authors.lastname: Zamora
authors.forename: Salome
authors.initials: S
authors.lastname: Delgado
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004553:Electric Conductivity; D008024:Ligands; D049449:Luminescence; D008958:Models, Molecular; D011108:Polymers / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D008024:Ligands; D011108:Polymers; D011743:Pyrimidines; D013440:Sulfides; D003300:Copper