Archive for April 30, 2014

Timetable during May 2014 holidays

30 April – shortened working day

1 – 4 May – holidays

8 May – shortened working day

9 – 11 May – holidays

User’s thesis defence

Ivanov AV avtoreferat

Scientific supervisor – Valery Nikolaev.

We wish the applicant to defend successfully.

Defence will take place 26.06.2014 at 15:00 at Sredniy pr. 41/43, Department of Chemistry (BCA).

New computers in our hallway

We have got two new computers in a hallway in front of the room 1066. Now users can submit even more applications simultaneously!

On the trail of Mendeleev

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)”.

Excursion 25.04.2014

Today a group of 1st year master students of the chemistry department visited our Center to get familiar with EPR.

Lecture 24.04.2014

S. M. Sukharzhevskiy has read a lecture “Applications of EPR spectroscopy for CMR users’ projects in 2013”.

Excursion 23.04.2014

Inorg. Chem., 2014

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 (PPP) and tris(diphenylphosphinomethyl)phosphine (PPPP), were synthesized. All the compounds under study, [AuM2(PPP)2]3+ (M = Au (1), Cu (2), Ag (3)), [M4(PPPP)2]4+ (M = Ag (4), Au (5)), [AuAg3(PPPP)2]4+ (6), and [Au2Cu2(PPPP)2(NCMe)4]4+ (7), were characterized crystallographically. The trinuclear clusters 1–3 contain a linear metal core, while in the isostructural tetranuclear complexes 4–6 the metal framework has a plane star-shaped arrangement. Cluster 7 adopts a structural motif that involves a digold unit bridged by two arms of the 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 2, 3, and 6 are stereochemically nonrigid and undergo reversible metal ions redistribution between several species, accompanied by their solvation–desolvation. The complexes 1–3 and 5–7 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.

Biology students

Last and this week three excursions have been made of the Center for biology students taking a course “Basics of modern analytical techniques”. Guests were shown NMR spectrometers and were told about the principles of operation and capabilities of the Center.

Two new articles of our users

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.