The rational design and syntheses of a new series of Os(II) complexes with formula [Os(fppz)(2)(CO)(L)] (1: L=4-dimethylaminopyridine; 2: L = pyridine; 3: L = 4,4'-bipyridine; 4: L = pyridazine; 5: L = 4-cyanopyridine), bearing two (2-pyridyl)pyrazolate ligands (fppz) together with one carbonyl and one N-heterocyclic ligand at the axial positions are reported. Single-crystal X-ray diffraction s...

Two generations of nitrobenzhydrol-based photocages for Zn(2+) have been prepared and characterized. The first series includes the tridentate ZinCast-1 utilizes a bis-pyridin-2-ylmethyl-aniline ligand that forms a 5,5-chelate ring upon metal binding. The related photocages ZinCast-2 with a N-[2-(pyridine-2-yl)ethyl]-N-(pyridine-2-ylmethyl)aniline (5,6-chelate ring) and ZinCast-3 with a N,N-bis[...

Spherical assemblies of the type [PdnL2n]2n+ can be obtained from PdII salts and curved N-donor ligands, L. It is well established that bent angle, α, ligand a decisive factor in self-assembly process, with larger angles leading to complexes higher nuclearity, n. Herein, we report heteroleptic coordination cages [PdnLnL′n]2n+, for which similar correlation between angle nuclearity observed. Tet...

The molecular structure of the title compound, [ZnBr(2)(C(10)H(8)N(2)S(2))], contains a seven-membered chelate ring in which the zinc atom is coordinated by two bromide ions and by the two pyridyl N atoms of a single 2,2'-dipyridyldisulfide (dpds) ligand within a slightly distorted tetra-hedron. As is usual for this type of complex, the disulfide group does not participate in zinc coordination....

Efficient synthesis of heteroleptic tris-cyclometalated Ir(III) complexes mer-Ir(C(/\)N)(2)(trpy) (trpy = 2-(1H-[1,2,3]triazol-4-yl)pyridine) is achieved by using the Cu(I)-triazolide intermediates formed in "click" reactions as transmetalating reagents. Ligand preparation and cyclometalation of Ir(III) is accomplished in one pot. The robust nature of click chemistry provides opportunities to i...

Bis(benzotriazol-1-yl)phenylmethane CHPh(btz)2 and tris(benzotriazol-1-yl)methane CH(btz)3 were used as N-donor ligands to prepare luminescent heteroleptic copper(I) complexes. [Cu{CHPh(btz)2}(PPh3)2][BF4] [Cu{CHPh(btz)2}(DPEphos)][BF4] (DPEphos = bis[(2-diphenylphosphino)phenyl] ether) obtained from the corresponding borohydride complexes [Cu(BH4)(PPh3)2] [Cu(BH4)(DPEphos)] tetrafluoroboric ac...

A series of original heteroleptic dirhodium(II) complexes (4 a–j) formula [Rh2(OAc)3(L)], where L is a redox-active ferrocenecarboxylate ligand, has been prepared. These have characterised by NMR, mass spectrometry and cyclic voltammetry. All show quasi-reversible redox behaviour for the ferrocenyl unit. The latter can be selectively oxidised [N(4-C6H4Br)3]+BF4−. Four selected 4 a, b, f i, eval...

We report the synthesis, structure, and photophysical and electroluminescent (EL) properties of a series of heteroleptic bis(pyridylphenyl)iridium(III) complexes with various ancillary guanidinate ligands. The reaction of the bis(pyridylphenyl)iridium(III) chloride [(ppy)(2)Ir(μ-Cl)](2) with the lithium salt of various guanidine ligands Li{(N(i)Pr)(2)C(NR(1)R(2))} at 80 °C gave in 60-80% yield ...