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Relevant academic research and scientific papers

5-(2-thienyl)tetrazolates as ligands for RuII-polypyridyl complexes: Synthesis, electrochemistry and photophysical properties

In this contribution, we report the synthesis, the characterization and the study of the electrochemical and photophysical properties of some novel mononuclear RuII-polypyridyl complexes of the general formula [Ru(tpy)(bpy)L]+ (tpy = 2,2′:6′,2"-terpyridine, bpy = 2,2′-bipyridyl) in which L is represented by 5-(2-thienyl)tetrazolate- type ligands. In addition, the reactivity of these mononuclear species toward different electrophiles such as H+ and CH3+ has been investigated, and the effects of the resulting regioselective electrophilic attacks on the electronic and structural properties of the tetrazolate ligand have been studied by NMR (1H, 13C) spectroscopy and X-ray crystal structural determination. Also, the electronic properties of the complexes have been explored by means of absorption and emission spectroscopy, together with a detailed electrochemical investigation combined with density functional theory (DFT) calculations. The data obtained from the study of such "model" mononuclear species constituted the basis for the characterization of the corresponding bithienyl-bridged dinuclear RuII complex, which displayed similar physical-chemical properties and an analogous behaviour toward the addition of electrophilic agents. The synthesis, structural study and investigation of the redox and photophysical properties of new mono- and dinuclear [Ru(tpy)(bpy)]-type (tpy = 2,2′:6′,2"-terpyridine, bpy = 2,2′-bipyridyl) complexesthat contain (thienyl)tetrazolates, are reported. Regioselective electrophilic additions were performed on all derivatives to allow modification of their structural and electronic features.

Self-Assembly of Enantiopure Pd12Tetrahedral Homochiral Nanocages with Tetrazole Linkers and Chiral Recognition

Enantiopure acceptors (R,R)M and (S,S)M [where M = (N1,N1,N2,N2-tetramethylcyclohexane-1,2-diamine)Pd(NO3)2] have been used to design enantiopure Pd(II) tetrahedral cages. Self-assembly of [1,4-di(1H-tetrazol-5-yl)benzene] (H2L1) with chiral acceptors (R,

Self-Assembly of a Pd8Macrocycle and Pd12Homochiral Tetrahedral Cages Using Poly(tetrazolate) Linkers

A two-dimensional molecular square (MC) was obtained by the self-assembly of a bis(tetrazole) linker, 4,4′-bis(1H-tetrazol-5-yl)-1,1′-biphenyl (H2L1), with a square-planar metal acceptor M [M = (tmeda)Pd(NO3)2, where tmeda = N,N,N′,N′-tetramethylethane-1,

Discovery of 5-(2-chloro-4′-(1H-imidazol-1-yl)-[1,1′-biphenyl]-4-yl)-1H-tetrazole as potent and orally efficacious S-nitrosoglutathione reductase (GSNOR) inhibitors for the potential treatment of COPD

Endogenous nitrosothiols (SNOs) including S-nitrosoglutathione (GSNO) serve as reservoir for bioavailable nitric oxide (NO) and mediate NO-based signaling, inflammatory status and smooth muscle function in the lung. GSNOR inhibition increases pulmonary GS

Polynuclear nonfused bis(1,3,4-oxadiazole)-containing systems

Nonfused bis-1,3,4-oxadiazoles were synthesized by reaction of 5-substituted mono- and bis-tetrazoles with mono- and dicarboxylic acid chlorides. The results of kinetic studies showed that the transformation of tetrazoles into 1,3,4-oxadiazoles is accelerated by 1 to 2 orders of magnitude on addition of a catalytic amount of dimethylformamide, triethylamine, or pyridine. Pleiades Publishing, Inc., 2006.