Dissolved organic matter in water of Daugava river

Thin Films Fabricated from Benzanthrone Luminescent DyesG.K.Kirilov 1 , A.S.Bulanov 1 , M.Fleisher 2 , E.M.Kirilova 1 , I.Mihailova 1 , S.Gonta 21 Daugavpils University, Vienibas 13, LV-5401, Daugavpils, Latvia2 Institute of Microbiology and Biotechnology, University of Latvia, Kronvalda blvd. 4, RigaLV-1586, Latviae-mail: georgk@inbox.lvOrganic thin films are used in a number of scientific and technical applications one ofwhich is producing cheap and large scale electronic and optical devices [1,2]. Thin filmssamples of novel organic luminophores - 3-N-(N’-methylacetamidino)benzanthrone and3-N-(N`,N`-dimethylbenzamidino)benzanthrone deposited on glass substrate wereprepared by thermal evaporation obtaining thin films of 2.5 to 3 µm thickness.The structural and spectroscopic properties of obtained films were investigated byconfocal microscope with input of femtosecond laser radiation, X-ray diffractometer andscanning electron microscope. In addition, quantum chemical calculations wereperformed, indicating electron properties of studied dye molecule in ground and excitedstate. Heats of formation, dipole moments and other parameters were extracted directlyfrom the data files following the geometry optimizations. The calculations show a planarconfiguration for the aromatic core of these compounds and two possible orientations ofamidine substituents.E= -4468.70 (kcal/mol)E= -4455.22 (kcal/mol)1. J. R. Sheats, H. Antoniadis, M. Hueschen, W. Leonard, J. Miller, R. Moon, D. Roitman, A.Stocking, Organic Electroluminescent Devices, Science, 273 (1996) 884-888.2. B.M. Krasovitskii, B.M. Bolotin, Organic luminescent materials. VCH Publishers, 1988.- 17 -