title: Copper(I) thiocyanate-amine networks: synthesis, structure, and luminescence behavior.
abstract: A series of metal-organic networks of CuSCN were prepared by direct reactions with substituted pyridine and aliphatic amine ligands, L. Thiocyanate bridging is seen in all but 1 of 11 new X-ray structures. Structures are reported for (CuSCN)L sheets (L = 3-chloro- and 3-bromopyridine, N-methylmorpholine), ladders (L = 2-ethylpyridine, N-methylpiperidine), and chains (L = 2,4,6-collidine). X-ray structures of (CuSCN)L(2) are chains (L = 4-ethyl- and 4-t-butylpyridine, piperidine, and morpholine). A unique N-thiocyanato monomer structure, (CuSCN)(3-ethylpyridine)(3), is also reported. In most cases, amine ligands are thermally released at temperatures <100 °C. Strong yellow-to-green luminescence at ambient temperature is observed for the substituted pyridine complexes. High solid state quantum efficiencies are seen for many of the CuSCN-L complexes. Microsecond phosphorescence lifetimes seen for CuSCN-L are in direct contrast to the nanosecond-lifetime emission of CuSCN. MLCT associated with pyridine π* orbitals is proposed as the excitation mechanism.
authors: Department of Chemistry, College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
authors: Kayla M
authors: KM
authors: Miller
authors: Shannon M
authors: SM
authors: McCullough
authors: Elena A
authors: EA
authors: Lepekhina
authors: Isabelle J
authors: IJ
authors: Thibau
authors: Robert D
authors: RD
authors: Pike
authors: Xiaobo
authors: X
authors: Li
authors: James P
authors: JP
authors: Killarney
authors: Howard H
authors: HH
authors: Patterson
mesh_terms: D000588:Amines / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008163:Luminescent Measurements; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D013861:Thiocyanates / Q000737:chemistry*
chemical_list: D000588:Amines; D009942:Organometallic Compounds; D013861:Thiocyanates; D003300:Copper; C031760:thiocyanate