Two copper(II) complexes with 4-benzoylpyridine ligand: Synthesis, crystal structure and luminescent properties

Structural comparison of copper(II) thiocyanate pyridine complexes

“…While a number of pyridine complexes of copper(II) thiocyanate have been reported [8]- [21], no systematic structural study and analysis has been carried out on the series. The complexes prepared and studied herein were easily synthesized as large green, blue, or black crystals by combining copper(II)…”

“…Several trans-[Cu(NCS) 2 (XPy) 2 ] structures already appear in the literature [8]- [21]. These complexes will be discussed below in context with those prepared herein.…”

Photochemical studies of cis -[Ru(bpy) 2 (4-bzpy)(CO)](PF 6 ) 2 and cis -[Ru(bpy) 2 (4-bzpy)(Cl)](PF 6 ): Blue light-induced nucleobase binding

“…For I (L = CO), these bands occur at 274nm ( = 2.01 x 10 4 M -1 cm -1 ), 303 nm (6.93 x 10 3 M -1 cm -1 ) and 415 nm (5.90 x 10 3 M -1 cm -1 ), while for II (L = Cl -) analogous bands occur at 315 nm ( = 2.20 x 10 4 M -1 cm -1 ), 345 nm (7.93 x 10 3 M -1 cm -1 ) and 440 nm (1.24 x 10 4 M -1 cm -1 ). The UV absorption spectrum of free 4-bzpy displays a strong peak at 264 nm and a shoulder at 223 nm[38].Although free 4-bzpy has a relatively low-lying n* excited state involving a ketone oxygen nonbonding orbital[33], these strong bands are π*π (4-bzpy) in origin. The higher energy strong bands observed in the spectrum for the cis-[Ru(bpy) 2 (4-bzpy)L] +/2+ complexes are likely to be largely ligand localized transitions of the type (π*π(bpy) , π*π (4-bzpy), π*n(4-bzpy) although these may overlap with π*(bpy)dπ(Ru) metal to ligand charge transfer (MLCT) transitions.…”

Crystal structure, synthesis and thermal properties of bis(acetonitrile-κN)bis(4-benzoylpyridine-κN)bis(isothiocyanato-κN)nickel(II)

“…There are already some compounds reported in the Cambridge Structural Database (Groom et al, 2016) that consist of transition-metal thiocyanates and 4-benzoylpyridine ligands. These are Zn(NCS) 2 (4-benzoylpyridine) 2 with tetrahedrally coordinated Zn II cations (Neumann et al, 2018) and Cu(NCS) 2 (4-benzoylpyridine) 2 in which the Cu II cations are square-planar coordinated (Bai et al, 2011). There are also a number of discrete complexes with an octahedral metal coordination and terminal thiocyanate anions (Drew et al, 1985;Soliman et al, 2014;, 2019aNeumann et al, 2018;Suckert et al, 2017).…”