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1.
Blagodatskikh I. V. Shchegolikhina O. I. Pozdnyakova Yu. A. Molodtsova Yu. A. Zhdanov A. A. 《Russian Chemical Bulletin》1994,43(6):993-998
Size exclusion chromatography was employed to elucidate the structure of the organosiloxane moiety in trimethylsiloxy derivatives of organometallosiloxanes containing Na, K, Ni, Mn, Cu, and Fe. An efficient technique of trimethylsilylation of organometallosiloxanes was developed to minimize alterations in their structure. The TMS derivatives of organometallosiloxanes were found to exist mostly as a more or less polydisperse mixture of cyclic poly[phenyltrimethylsiloxy siloxane]s. The preferred size of the cycles depends primarily on the nature of the metal in organometallosiloxane.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1057–1062, June, 1994.This work was performed with the financial support of the Russian Foundation for Basic Research (Grant No. 93-03-18121). 相似文献
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M. V. Shchemelinina Yu. A. Molodtsova A. A. Anisimov A. S. Goloveshkin E. G. Kononova 《Green Chemistry Letters and Reviews》2016,9(1):69-75
The possibility to synthesize stereoregular tris-cis-tris-trans- dodeca[(phenyl)(hydroxy)]cyclododecasiloxane (tris-cis-tris-trans-[PhSi(O)OH]12) in an inorganic liquid medium – aqueous carbonic acid solution – was shown. The interaction of polyhedral phenylcoppersodiumsiloxane, {[(C6H5Si(O)O?]12(Cu2+)4(Na+)4}*(L)m (L?=?Bun OH, H2O), with carbonic acid can be considered as a new ‘green’ method to obtain functional organosiloxane macrocycles. In contrast to the known methods, no organic solvents were used during the reaction. The identification of the structure of the end compound was performed by means of NMR and Infrared spectroscopy as well as X-ray crystallography. 相似文献
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V.Yu. Aristov O.V. Molodtsova D.V. Vyalikh M. Knupfer P. De Padova G. Le Lay 《Journal of Electron Spectroscopy and Related Phenomena》2010
High-resolution core-level data from the prototypical In/Si(1 1 1) system have been acquired at 10 K. An asymmetric tail in the In 4d spectra reveals a metallic character of the low temperature Si(1 1 1)8 × 2 phase confined to the inner indium rows. The decoupling of the one-dimensional inner indium chains from any metallic environment at ∼10 K suggests a possible Luttinger liquid behavior. At room temperature essentially a broadening of the spectral features is noticed, which appears compatible with a fluctuation scenario. 相似文献
4.
O.V. Molodtsova V.M. Zhilin D.V. Vyalikh S. Nannarone M. Knupfer 《Applied Surface Science》2007,254(1):99-102
The chemistry and electronic structure evolution were studied upon the formation of the interfaces between copper phthalocyanine and Ag and Sn deposited on it in ultra high vacuum conditions. The measurements were performed by means of high-resolution photoemission spectroscopy of core-levels and the valence band, and using synchrotron-radiation facilities. The investigations demonstrate the formation of chemically inert and abrupt interfaces. 相似文献
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Physics of Atomic Nuclei - Low energy $$M1$$ excitations are studied within the Time Dependent Hartree–Fock–Bogoliubov (TDHFB) approach. The solution of TDHFB equations by the Wigner... 相似文献
7.
Aristov VY Molodtsova OV Maslyuk VV Vyalikh DV Zhilin VM Ossipyan YA Bredow T Mertig I Knupfer M 《The Journal of chemical physics》2008,128(3):034703
The electronic structure of the organic semiconductor copper-phthalocyanine (CuPc) has been determined by a combination of conventional and resonant photoemission, near-edge x-ray absorption, as well as by the first-principles calculations. The experimentally obtained electronic valence band structure of CuPc is in very good agreement with the calculated density of states results, allowing the derivation of detailed site specific information. 相似文献
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V. V. Maslyuk V. Y. Aristov O. V. Molodtsova D. V. Vyalikh V. M. Zhilin Y. A. Ossipyan T. Bredow I. Mertig M. Knupfer 《Applied Physics A: Materials Science & Processing》2009,94(3):485-489
The electronic structure and morphology of organic semiconducting cobalt-phtalocyanine (CoPc) films in situ prepared on the
Au(001)-5×20 superstructure have been studied by a combination of experimental and theoretical work. The CoPc molecular film
was characterized by photoemission spectroscopy (PES, valence band and core-level). The experimental results were simulated
and have been explained in the framework of density functional theory (DFT) calculations. The C 1s and N 1s core level spectra were analyzed by taking into account the fact that both types of atoms have different nonequivalent positions
in the molecule. And finally, the experimentally obtained electronic valence band structure of CoPc is in very good agreement
with ab initio density of state results, allowing a detailed site-specific insight into the system. 相似文献
10.
Elena V. Matukhina Olga I. Shchegolikhina Yulia A. Molodtsova Yulia A. Pozdniakova Konstantin A. Lyssenko Viktor G. Vasil'ev Mikhail I. Buzin Dimitris E. Katsoulis 《Liquid crystals》2004,31(3):401-420
Investigations of thermotropic phase transitions performed on organocyclosiloxanes [PhSi(O)OSiR]6, where R is Me3, Me2(CH2Cl) or Me2(CH≃CH2), have revealed that all these hexamers are mesomorphic compounds. The hexamers exhibit uncommon polymesomorphic behaviour forming two quite different mesomorphic structures. The molecular arrangement in the low temperature (LT) modification is characterized by two-dimensional (2D) long-range order with hexagonal packing. The X-ray diffraction pattern and peculiarities of molecular packing in the crystal lead us to suggest that the LT-mesophase is columnar, presumably of the Colhd type. The LT-mesophase is formed by dimeric moieties, which associate with each other in column-like substructures, the ring planes not orthogonal to the stack axis. The high temperature (HT) mesophase is a plastic crystal (3D-order), where molecules take up positions in a face-centred cubic lattice. This is a very uncommon example of thermal behaviour for plastic crystals that provides a unique opportunity to bridge the gap between plastic crystalline and liquid crystalline mesomorphic behaviour. The thermal and structural properties of the mesophases depend upon the type of side groups of the hexamers. The size of the ring also affects the phase behaviour and the mesomorphic structure. This conclusion is consistent with data obtained by us earlier for cyclotetrasiloxanes. 相似文献