Dissolved organic matter in water of Daugava river

Novel Heterocyclic Imino and Amino Derivatives of Benzanthrone:Synthesis and PropertiesI.D Ivanova 1 , N.V.Orlova 1 , A.I .Puchkin 2 , E.M.Kirilova 21 Faculty of Chemistry, University of Latvia, 48 Valdemara str., LV-1013, Riga (Latvia);2 Chemistry Department, Daugavpils University, 13 Vienibas str., LV-5401, Daugavpils(Latvia).e-mail: elena.kirilova@inbox.lvThe design of new fluorescent molecules is of continuing interest for many applications inresearch and industry. Especially donor–acceptor -conjugated organic materials haveattracted considerable interests owing to their potential wide applications for developmentof photoactive materials. Many derivatives of benzo[de]anthracene-7-one are known aseffective luminescent dyes with emission in the spectral region from green to red-purple,depending on the structure [1].Recently we reported the synthesis, molecular structures and spectral properties of a seriesof amino, amidino, and iminobenzanthrones, which appeared to be particularly interestingbecause they lead to perspective luminescent materials [1]. The aim of this work is tocreate a series of benzanthrone amines and azomethines by including new heterocyclicsubstituents in benzanthrone chromophoric system in order to find novel luminophoreswith large luminescence intensity and high stability.Target benzanthrone derivatives are synthesized by condensation reaction ofcorresponding aminobenzanthrone with appropriate heterocyclic aldehydes with followingreduction of obtained imines by NaBH 4 in DMF solution:R:NH 2ROHNRNaBH 4, DMFHNRNNNNOOO1 2a-g 3a-gSynthesized derivatives have bright from yellow to red fluorescence in organic solventsand solid state. The structure of obtained compounds was confirmed by NMR, IR andmass spectroscopy. In addition thermal properties and crystal structures of preparedcompounds have been investigated.1. B.M. Krasovitskii, B.M. Bolotin, Organic luminescent materials. - VCH Publishers, 19882. E. M Kirilova, I. Kalnina, G. K. Kirilov, S. V Belyakov, I. Meirovics. Spectroscopic Study ofBenzanthrone 3-N-Derivatives as New Hydrophobic Fluorescent Probes for Biomolecules//J.Fluoresc. – 2008 - Vol. 18 (3-4) – P.645-6483. V.M Trusova, E. Kirilova, I. Kalnina, G. Kirilov, O.A. Zhytniakivska, P.V. Fedorov, G.Gorbenko, Novel Benzanthrone Aminoderivatives for Membrane Studies.// J.Fluoresc.- 2012 -Vol. 22 (3) – P.953-959OSN- 11 -