7783-99-5Relevant articles and documents
Suzuki, T.
, p. 726 - 732 (1910)
Jeffery, F. H.
, p. 16 - 20 (1919)
Two novel lineal d10 metal-organic frameworks with a ditopic flexible linker: Structures, blue luminescence and thermal stability
Brito, Iván,Vallejos, Javier,Cárdenas, Alejandro,López-Rodríguez, Matías,Bolte, Michael,Llanos, Jaime
, p. 897 - 901 (2011)
Two novel supramolecular Ag(I) complexes, {[AgL]NO3}n (1), and {[AgL]CF3SO3}n (2), (L) = ethane-1,2-diyl bis(pyridine-3-carboxylate) have been prepared by self-assembly of Ag(I) salts with ethane-1,2-diyl bis(pyridine-3-carboxylate) (L) in THF/H2O system. The IR, TGA and elemental analysis have been recorded and both complexes were structurally characterized by X-ray crystallography confirming that complexes (1) and (2) are one-dimensional coordination polymers with lineal and helical chain motifs respectively. Solid emission spectra at room temperature of (1) and (2) show interesting blue phosphorescence with maximum intensity at 414 and 411 nm respectively, which are assigned to (LLCT) transition.
Evidence for dissociative photosubstitution reactions of [Ru(trpy)(bpy)(NCCH3)]2+. Crystal and molecular structure of [Ru(trpy)(bpy)(py)](PF6)2·(CH3) 2CO
Hecker, Clark R.,Fanwick, Phillip E.,McMillin, David R.
, p. 659 - 666 (2008/10/08)
In acetonitrile and in the presence of appropriate nucleophiles, the complex [Ru(trpy)(bpy)(NCCH3)]2+ undergoes a ligand substitution reaction when irradiated into the metal-to-ligand absorption band system. (The symbol trpy denotes 2,2′:6′,2″-terpyridine, and bpy denotes 2,2′-bipyridine.) At 25°C quantum yields for displacement of the acetonitrile ligand are 0.0013 (1), 0.0013 (1), and 0.0026 (5) for 1.0 M solutions of pyridine, 4-phenylpyridine, and 2-methylpyridine, respectively. No photochemistry is observed for the osmium(II) analogue, and all findings can be understood in terms of a dissociative reaction mechanism involving a reactive 3d-d state. The 3d-d state is accessed from a 3CT state, which is emissive below ca. 180 K. From measurements of the temperature dependence of the emission lifetime, the barrier to population of the 3d-d state is approximately 1500 cm-1. Finally, the crystal structure of [Ru(trpy)(bpy)(py)](PF6)2·(CH3) 2CO has been determined with a diffractometer. The compound crystallizes with two independent formula units in a triclinic unit cell. The space group is P1, and there are four formulas per unit cell (Z = 4) with a = 13.150 (1) A?, b = 14.927 (1) A?, c = 19.771 (2) A?, α = 102.840 (9)°, β = 91.655 (8)°, and γ = 103.371 (8)°. The structure was solved by the full-matrix least-squares method, and after the final stage of refinement, R = 0.055. There is evidence of interligand steric strain within the coordination sphere, and the bpy ligand is coordinated asymmetrically with a difference in Ru-N bond lengths of about 0.04 A?. The internal strain probably explains why we have been unable to prepare the 2-methylpyridine analogue by standard methods.