A.A. Melekhova, D.V. Krupenya, V.V. Gurzhiy, A.S. Melnikov, P.Yu. Serdobintsev, S.I. Selivanov, S.P. Tunik
“Synthesis, characterization, luminescence and non-linear optical properties of diimine platinum(II) complexes with arylacetylene ligands”
J. Organomet. Chem., 2014, accepted
DOI: 10.1016/j.jorganchem.2014.04.002
A series of platinum(II) complexes (diimine)Pt(C≣CR)2, where diimine is 2,2′-bipyridine (bpy) or 4,4′-bis(tert-butyl)-2,2′-bipyridine (dtbpy) and alkynyl ligand is biphenylacetylide or terphenylacetylide, were synthesized and their photophysical and non-linear optical properties were investigated. All compounds (1–3) were characterized using NMR spectroscopy, ESI mass-spectrometry and elemental analysis. X-Ray crystal structure of the complex containing 4,4′-bis(tert-butyl)-2,2′-bipyridine and terphenylacetylide ligands is reported. The electronic absorption and emission spectra of the complexes have been studied. Room temperature phosphorescence was observed for the complexes in solution with the luminescence quantum yield in the 7.5–11% range and excited state lifetimes in microsecond time domain. All complexes under study exhibit two-photon luminescence and their double quantum absorption cross-section was found to be in the 9–22 GM range.
RC MRMI received the thanks of organisers of the conference “Mendeleev 2014” for assistance in conducting the tour and master class.
Among the talks presented at the conference was a talk coauthored with the employee of the Center.
А.С. Конева, Е.А. Сафонова, М.А. Вовк, Н.А. Смирнова
“Влияние температуры и содержания воды на коэффициенты самодиффузии в микроэмульсиях «вода в декане», стабилизированных смесью неионных ПАВ (Span80+Tween80)”.
M.T. Dau, J.R. Shakirova, A.J. Karttunen, E.V. Grachova, S.P. Tunik, A.S. Melnikov, T.A. Pakkanen, I.O. Koshevoy
“Coinage Metal Complexes Supported by the Tri- and Tetraphosphine Ligands”
Inorg. Chem., 2014, ASAP
DOI: 10.1021/ic500402m
A series of tri- and tetranuclear phosphine complexes of d10 metal ions supported by the polydentate ligands, bis(diphenylphosphinomethyl)phenylphosphine (<i">PPP) and tris(diphenylphosphinomethyl)phosphine (<i">PPPP), were synthesized. All the compounds under study, [AuM2(<i">PPP)2]3+ (M = Au (<b">1), Cu (<b">2), Ag (<b">3)), [M4(<i">PPPP)2]4+ (M = Ag (<b">4), Au (<b">5)), [AuAg3(<i">PPPP)2]4+ (<b">6), and [Au2Cu2(<i">PPPP)2(NCMe)4]4+ (<b">7), were characterized crystallographically. The trinuclear clusters <b">1–<b">3 contain a linear metal core, while in the isostructural tetranuclear complexes <b">4–<b">6 the metal framework has a plane star-shaped arrangement. Cluster <b">7 adopts a structural motif that involves a digold unit bridged by two arms of the <i">PPPP phosphines and decorated two spatially separated CuI ions chelated by the remaining P donors. The NMR spectroscopic investigation in DMSO solution revealed the heterometallic clusters <b">2, <b">3, and <b">6 are stereochemically nonrigid and undergo reversible metal ions redistribution between several species, accompanied by their solvation–desolvation. The complexes <b">1–<b">3 and <b">5–<b">7 exhibit room temperature luminescence in the solid state (Φem = 6–64%) in the spectral region from 450 to 563 nm. The phosphorescence observed originates from the triplet excited states, determined by the metal cluster-centered dσ* → pσ transitions.
A.P. Molchanov, R.S. Savinkov, A.V. Stepakov, G.L. Starova, R.R. Kostikov, V.S. Barnakova, A.V. Ivanov
“A Highly Efficient and Stereoselective Cycloaddition of Nitrones to N-Vinylpyrroles”
Synthesis, 2014, 46, 0771-0780
DOI: 10.1055/s-0033-1340479
1,3-Dipolar cycloadditions of a number of C-aryl, C-carbamoyl-, and C,C-bis(methoxycarbonyl)nitrones and substituted N-vinylpyrroles proceed with high efficiency and regioselectivity with the formation of only one isomeric substituted 5-(1H-pyrrol-1-yl)isoxazolidine cycloadduct.
A.V. Stepakov, A.G. Larina, V.M. Boitsov, V.V. Gurzhiy, A.P. Molchanov, R.R. Kostikov
“Synthesis of indene derivatives via reactions of vinylidenecyclopropanes with the N-acyliminium cations generated from hydroxylactams”
Tetrahedron Lett., 2014, 55, 2022-2026
DOI: 10.1016/j.tetlet.2014.02.039
A novel route for the synthesis of 1H-indene derivatives via the reactions of vinylidenecyclopropanes (VCPs) with the N-acyliminium cations generated from hydroxylactams is described.
Today Deputy Minister of Education and Science of the Russian federation L.M. Ogorodova, director of the deparment for attestation of scientific and scientific-pedagogical personnel of the Russian Federation Ministry of Education and Science I.A. Shishkanova, Rector of the St. Petersburg State University N.M. Kropachev with vice-rectors I.A. Dementiev and S.P. Tunic visited our Center as part of their visit to the St. Petersburg State University.
For more details visit web-page of the St. Petersburg State University.
