Reaction medium effects

The most important results

  • Adsorption of 7-DHC at silica surface reduces its efficiency due to the shift of previtamin D conformational equilibrium towards its primary cis-conformer.

    • adsorption
    Model of previtamin D adsorption at SiO2 surface.

    I.P.Terenetskaya, O.G.Perminova, A.M.Yeremenko "Photoisomerization of provitamin D in dispersive systems", J.Mol.Struct., 1990, Vol.219, pp.359-364.

    I.P.Terenetskaya, O.G.Perminova, A.M.Yeremenko "Effect of environment on the conformational equilibrium and photoconversions of previtamin D", J.Mol.Struct., 1992, Vol.267, pp.93-98.

    O.G.Dmitrenko, I.P.Terenetskaya, N.Yu.Lopukhovich, and V.M.Ogenko "On thermally induced conversions of vitamin D on the surface of dispersed SiO2", Russian Journal of Physical Chemistry, 1994, Vol.68, №12, pp.2252-2253.

    O.G.Dmitrenko, I.P.Terenetskaya "Theoretical basis for the possibility of the products conformational control of previtamin D photochemical conversions", Theoretical and Eksperimental Chemistry, 1991, Vol.29, №4, pp.326-332.

    I.P.Terenetskaya, O.G.Dmitrenko, A.M.Eremenko "Conformational control in previtamin D photochemistry by heterogeneous reaction media", Research on Chemical Intermediates, 1995, Vol.21, №6, pp.653-664.

    O.G.Dmitrenko, I.P.Terenetskaya, W.Reischl "Solvent effect on previtamin D conformational equilibrium and its photoreactions", J.Photochem. Photobiol. A: Chemistry, 1997, Vol.104, pp.113-117.

    O.G.Dmitrenko, G.M.Telbiz, I.P.Terenetskaya "Features of vitamin D3 interaction with an aerosil surface", Ukrainian Biochemical Journal, 1997, Vol.69, №1, pp.103-107. (in Russian)

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  • In LC matrix efficiency of previtamin D cis-trans isomerization is considerably increased as compared with ethanol solution.

    • I.A. Gvozdovsky, I.P. Terenetskaya "Comparative study of the kinetics of provitamin D photoisomerization in ethanol and in the liquid crystal", Functional Materials, 2000, Vol.7, №3, pp.508-512.

    I. Gvozdovskyy, T. Orlova, I. Terenetskaya "Features of Previtamin D cis-trans isomeriztaion in the nematic LC matrices: orientation and cholesteric order effects", Mol.Cryst.Liq.Cryst., 2005, Vol.434, pp.325-332.

    T.N. Orlova, I.P. Terenetskaya "Specific features of photo-isomerization of provitamin D3 in a nematic liquid ctystal", Opt.Spectr., 2006, Vol.100, pp.584-589.


  • For the first time using Langmuir 7-DHC films a contactless method of nematic LC photoorientation has been developed that is actual in manufacture of various liquid crystal devices.

photo HP photo HH
Photos of two-domain LC cells in the crossed polarizers. Electrically induced P=>H transition in the irradiated part of the LC cell with E7.

I.A.Gvozdovsky, I.P.Terenetskaya "The LC photoalignment by UV irradiation of the film based on PMMA network with provitamin D3", Surface, 2002, №2, с.80-83.

I. Gvozdovskyy, I. Terenetskaya "UV induced orientational effects in nematic LCs caused by the adsorbed provitamin D3 photoconversions", J.Sci.Appl.Photo., 2002, Vol.47, №2, pp.45-50.

I. Gvozdovskyy, T. Orlova, I. Terenetskaya "UV induced photoalignment and colour change in nematic liquid crystals with provitamin D dopant", Mol.Cryst.Liq.Cryst., 2005, Vol.430, pp.199-204.

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