Hydrolysis of N-methyl-N-(2,3,4,5,6-pentahydroxyhexyl)-N′-(3-triethoxysilylpropyl)urea gave water-soluble polysiloxane nanoparticles. They can be used for the preparation of intensely luminescent stable aqueous suspensions of water-insoluble or poorly soluble compounds (Eu(BTFA)3 · 6H2O complex and tetracyano-tetraaryl-porphyrazines) for biomedical applications, in particular, for bioimaging.

Взаимодействие труднорастворимого тетрагидрата бис(1-гидроксиэтилиден)дифосфоната марганца(II) Mn(HL) · 4HO с 2-аминоэтанолом HNCHCHOH в водной среде при нагревании до 70-80 °С вызывает первоначальное образование растворимого бис(1-гидроксиэтилиден)дифосфоната-трис(2-гидроксиэтанаминий) марганца(II) Mn(HL) · 3HNCHCHOH · 4HO, который затем диспропорционирует до малорастворимого (1-гидроксиэтилиден)дифосфоната-2-гидроксиэтан-аминий марганца(II) MnHL · HNCHCHOH и не содержащего катионов металла координационного полимера 1-(гидроксиэтилиден)дифосфоновой кислоты с 2-аминоэтанолом. Труднорастворимый MnHL · HNCHCHOH легко переводится в растворимую форму при обработке 2-аминоэтанолом или 2-амино-2-(гидроксиметил)пропан-1,3-диолом HNC(CHOH)

Reaction of poorly soluble manganese(II) bis(1-hydroxyethylidene)diphosphonate tetrahydrate Mn(H3L)2 · 4H2O with 2-aminoethanol H2NCH2CH2OH in an aqueous solution on heating to 70–80°C causes the initial formation of soluble tris(2-hydroxyethanaminium) manganese(II) bis(1-hydroxyethylidene) diphosphonate Mn(H3L)2 · 3H2NCH2CH2OH · 4H2O, which next disproportionates into poorly soluble 2-hydroxyethanaminium manganese(II) (1-hydroxyethylidene)diphosphonate MnH2L · H2NCH2CH2OH and metal-cation-free coordination polymer of (1-hydroxyethylidene)diphosphonic acid with 2-aminoethanol. Poorly soluble MnH2L · H2NCH2CH2OH can be readily converted into the soluble form by treatment with 2-aminoethanol or 2-amino-2-(hydroxymethyl)propane-1,3-diol H2NC(CH2OH)3.

New 1′,1′-dimethyl-2′,5′-dihydro-1′H-pyrrolo[3′,4′:1,9](C60-I h)[5,6]fulleren-1-ium iodides containing different aryl groups in position 2 of the pyrrolidine ring have been synthesized. Their reactions with bis-(toluene)chromine afforded the corresponding 3′-aryl-3′H-cyclopropa[1,9](C60-I h)[5,6]fullerenes.

New composite material-multi-walled carbon nanotubes (MWCNTs) coated with thin iron films-have been prepared by MOCVD growth technique using iron pentacarbonyl as the iron source. Their structures and morphologies were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and thermal gravimetric analysis. The NEXAFS C1s-and Fe2p-spectra of the composite materials MWCNTs-pyrolytic Fe were studied by total electron yield mode with using synchrotron radiation Russian-Germany beamline at BESSY-II. The study has shown that top layers of the MWCNTs in composite do not have essential destruction, coating of MWCNT's-surface is Fe3O4 and this coating is continuous. The iron oxide adhesion is provided by chemical binding between the carbon atoms of the MWCNT's top layer and the oxygen atoms of the coating.

A reaction of bis(arene)chromium complexes with [60]fullerene derivatives leads to ionradical bis(arene)chromium [60]fullerides. Bis(1,2,4,5-tetramethylbenzene)chromium [70]fulleride was synthesized similarly. The compounds obtained were characterized by spectroscopic methods, their thermal decomposition was studied and thermal stability of their dimers was evaluated.

The redox reactions of organic polyadducts of fullerene R n C 60 (R = Bu t , n = 4, 8, 12; R = PhCH 2 , n = 12) with various oxidants (I 2 , AgBF 4 , tetracyanoethylene (TCNE), 3,6-di- tert -butyl- o -benzoquinone, 3,6-di- tert -butyl-4,5-difluoro- o -benzoquinone, C 60 ) and the reductant (potassium) are reported. The oxidation of R n C 60 proceeds under mild conditions, in contrast to the oxidation of pristine C 60 . The formation of radical oxidation products was confirmed by ESR spectroscopy. For Bu t 12 C 60 the reaction with excess of TCNE leads to further oxidation of the Bu t 12 C 60 +· radical cation. The reduction of R n C 60 with potassium does not occur at room temperature. Only on heating to 60 °C the corresponding radical anions were detected. To explain the experimental results the R n C 60 molecules were studied by DFT. The calculations reveal an essential decrease in the ionization energies and electron affinities on going from C 60 to R n C 60 .

Regularities of formation of nanoporous macroscopic cylinders consisted of radial-oriented multi-wall carbon nanotubes have been investigated. The cylinders were synthesized by MOCVD method (pyrolysis of ferrocene and toluene mixtures in the argon flow under atmospheric pressure at 850 C). Four regions of different cylinder structures were revealed. The obtained samples were characterized by various physico-chemical methods

For the first time, bis(anisole)chromium fulleride (PhO Me ) 2 Cr +· [C 60 ] −· and a crystalline complex of fullerene with ortho-butoxyanisole have been obtained. The temperature dependence of the parameters of the EPR spectrum of bis(anisole)chromium fulleride (PhO Me ) 2 Cr +· [C 60 ] −· has been studied. The molecular structure of the complex of fullerene with ortho-butoxyanisole has been established.

Изучена температурная зависимость теплоемкости кристаллического бис( 6-этилбензол)хром фуллерида [( 6-EtPh)2Cr].+[C60]. в адиабатическом вакуумном калориметре в интервале 6.7–344 К с погрешностью ±0.3. Методом электронного парамагнитного резонанса (ЭПР) исследована зависимость параметров сигнала ЭПР бис( 6-этилбензол)хром фуллерида от температуры в интервале 120–290 К. В области 204–246 К при нагревании выявлено обратимое эндотермическое превращение, обусловленное диссоциацией димера (C )2 и образованием фуллерида [( 6-ЕtPh)2Cr].+[C60].; оценены и проанализированы его стандартные термодинамические характеристики. По полученным экспериментальным данным рассчитаны стандартные термодинамические функции: теплоемкость, энтальпия, энтропия и функция Гиббса димера фуллерида в области от T 0 до 204 К и мономерного комплекса [( 6-ЕtPh)2Cr].+[C60]. в интервале 246–344 К. Сопоставлены стандартные термодинамические свойства исследуемого фуллерида, изученных ранее фуллеридов и фуллерита C60.

Reaction of 3-aminoacetophenone with excess of methyl trifluoroacetate proceeds in two stages and leads to the formation of 3-trifluoroacetamidobenzoyltrifluoroacetone 3-CF3C(O)NHC6H4C(O)CH2C(O)CF3 instead of the expected 3-aminobenzoyltrifluoroacetone 3-NH2C6H4C(O)CH2C(O)CF3. The cause is the readily proceeding reaction of CF3COOCH3 with amine group of the source 3-aminoacetophenone and the initial formation of 3-trifluoroacetamidoacetophenone. On the basis of the synthesized β-diketone the luminescent complexes were synthesized: europium(III) tris(3-trifluoroacetamidobenzoyltrifluoroacetonate) trihydrate and europium(III) tris(3-trifluoroacetamidobenzoyltrifluoroacetonate)(phenanthroline). The trifluoroacetylamide group is converted into the primary amine by treatment the solutions of the europium complexes with aqueous alkali. The molecular and crystal structures of 3-trifluoroacetamidoacetophenone were investigated.

A new chelating ligand, 4-formylphenyl 7-acetyl-8-oxononylcarbamate, was synthesized starting from 4-hydroxybenzaldehyde and 6-chlorohexyl isocyanate. The reaction of this ligand with europium triisopropoxide gave the corresponding europium(III) complex.

In the present research, the temperature dependence of heat capacity C-p,m(o) = f(T) of crystalline bis-(eta(6)-cumene)chromium fulleridel [(eta(6)-PhCH(CH3)(2))(2)Cr](.+)[C-60](.-) has been measured between T = (6 and 310) K in the precision adiabatic vacuum calorimeter and reported for the first time. Also, for the first time, the temperature dependence of EPR signal parameters of bis-(eta(6)-cumene)chromium fulleride over the range from T = (120 to 290) K was investigated by electron paramagnetic resonance. In the interval from T = (196 to 240) K the reversible endothermic transformation was detected and its thermodynamic characteristics were estimated. This transformation was caused by dissociation of dimer (C-60(-))(2) and formation of fulleride [(eta(6)-PhCH(CH3)(2))(2)Cr](.+)[C-60](.-) during heating. The experimental results have been used to calculate the standard (p(o) = 0.1 MPa) thermodynamic functions C-p,m(o)/R, Delta H-T2(T1)m(o)/RT, Delta S-T2(T1)m(o)/R, and Phi(o)(m)/R = Delta S-T2(T1)m(o)/R - Delta H-T2(T1)m(o)/RT (where R is the universal gas constant) for dimeric fulleride over the range from T (0 to 196) K and for monomeric complex [(eta(6)-PhCH(CH3)(2))(2)Cr](.+)[C-60](.-) between T = (240 and 310) K. (C) 2011 Elsevier Ltd. All rights reserved.