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Information × Registration Number 0212U002020, 0109U001433 , R & D reports Title Role of hydrogen bonds in formations of magnetic and structural phase transitions in solids popup.stage_title Head Anders Olexandr Georgiyovich, Registration Date 12-01-2012 Organization Kharkov National University named after V.N. Karazin popup.description2 Objects of study monocrystals (CuSO4)(en) 2H2O, (CuSO4)(en).2D2O. Research мethods electron paramagnetic resonance, specific heat, Raman scattering. Purpose of work experimental research of the hydrogen bond influence on the formation of various low-temperature phases and on the mechanisms of exchange in monocrystals (CuSO4)(en) 2H2O, uSO4)(en).2D2O. The main results: The effect of deuterium substitution of hydrogen in the molecules of crystallization water of the organometallic compounds and (CuSO4)(en).2D2O on the value of exchange interaction between copper ions was investigated. The exchange parameter reduction of the deuterated sample was found, that confirms the participation of hydrogen bonds in exchange interaction in the studied systems. It was established that deuteration does not lead to a significant increase interchain exchange. It was found that the deuteration replaces hydrogen not only in the crystallization water molecule, but also replaces the hydrogen in the etylendiamin molecule. This hydrogen is replaced only on relations CH2, such substitution does not occur on relations NH2. It is established that deuteration leads to a "weighting" of ethylenediamine ring. This results in a "fixation" of gauche form of ethylenediamine. Order-disorder structural phase transition is not realized in the crystal (CuSO4)(en).2D2O, but it takes place in the crystal (CuSO4)(en) 2H2O . Product Description popup.authors Єфімова Н. Андерс О. Ванькевич О. Таранова І. popup.nrat_date 2020-04-02 Close