A new homocysteine-selective sensor based on the iridium(III) complex Ir(pba)2(acac) (Hpba = 4-(2-pyridyl)benzaldehyde; acac = acetylacetone) was synthesized, and its' photophysical properties were studied. Upon the addition of homocysteine (Hcy) to a semi-aqueous solution of Ir(pba)2(acac), a color change from orange to yellow and a luminescent variation from deep red to green were evident to ...

Os complexos [Co(acac) 2 ], [Co(acac) 3 ], [Fe(acac) 3 ] e [Ni(acac) 2 ] (acac = acetilacetonato) dissolvidos em tetrafluoroborato de 1-butil-3-metilimidazônio (1), trifluorometanosulfonato de 1butil-3-metilimidazólio (2) ou hexafluorofosfato de 1-butil-3-metilimidazólio (3), catalisam a hidrogenação de 1,3-butadieno em butenos em sistema catalítico tipicamente bifásico. A conversão do 1,3-buta...

The catalyst formation in the system Ni(acac),, C&I,, (iBu)sAl was investigated by means of infrared spectroscopy. It was found that the Al(acac)s and (iBu)&l(acac) formed are both by-products of catalyst formation without a catalytic activity. Ni(acac)z loses its acac groups forming the unstable (iBu)sNi compound; without CsH, being present, this compound disproportionates to Ni metal and isob...

The dinuclear title complex, [Co2(C5H7O2)4(μ-OH)2] or [Co(acac)2(μ-OH)]2, where acac is acetyl-acetonate, is centrosymmetric with half of the mol-ecule per asymmetric unit. The mol-ecular structure is a dimer of octa-hedrally coordinated Co(III) atoms with four O atoms from two chelating acac ligands and two O atoms from bridging hydroxide ligands. The crystal packing features weak C-H⋯O inter-...

Central nervous system oxygen toxicity (CNS-OT) seizures occur with little or no warning, and no effective mitigation strategy has been identified. Ketogenic diets (KD) elevate blood ketones and have successfully treated drug-resistant epilepsy. We hypothesized that a ketone ester given orally as R,S-1,3-butanediol acetoacetate diester (BD-AcAc(2)) would delay CNS-OT seizures in rats breathing ...

The nuclease activity of VO(acac)2 (1, acac = acetylacetone) and its derivatives VO(hd)2 (2, hd = 3,5-heptanedione), VO(Cl-acac)2 (3, Cl-acac = 3-chloro-2,4-pentanedione), VO(Et-acac)2 (4, Et-acac = 3-ethyl-2,4-pentanedione) and VO(Me-acac)2 (5, Me-acac = 3-methyl-2,4-pentanedione), is studied by agarose gel electrophoresis, UV-visible spectroscopy, cyclic and square wave voltammetry and (51)V ...

Ligands based upon 4-carboxamide-2-phenylquinoline derivatives have been synthesised with solubilising octyl hydrocarbon chains and tethered aromatic chromophores to give naphthyl (), anthracenyl () and pyrenyl () ligand variants, together with a non-chromophoric analogue () for comparison. (1)H NMR spectroscopic studies of the ligands showed that two non-interchangeable isomers exist for and w...

Abstract Reaction of [Ru(acac) 2 (MeCN) ], acac − =acetylacetonate, with N ‐phenylcamphoriminoquinone (pciq) or the new ‐(2‐thiomethylphenyl)‐camphoriminoquinone (tciq) produces complexes (pciq)] and (tciq)] N,O N,S coordination E Z configuration at C=N bond, respectively. Oxidation state assignments in comparison classical iminoquinone ligands are based on structural data connection DFT calcul...

Two new monobasic tridentate O?N?N donor ligands, HL1 (I) and HL2 (II) have been obtained in two steps by reacting phenylhydrazine salicylaldehyde or 3,5-di-tert-butylsalicylaldehyde then the resulting compounds with 2-chloromethylbenzimidazole presence of triethylamine. The reaction [VIVO(acac)2] these ligands a 1:1 molar ratio dry methanol led to formation homogeneous oxidovanadium(IV) comple...