Dissolved organic matter in water of Daugava river

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Fluorescence intensity, a. u.Spektrofluorometrisko pētījumu metožu pielietojums smago metālu jonunoteikšanai ūdens vidēA.Pučkins 1 , E.Kirilova 11 Daugavpils Universitāte, Daugavpils, Latvijae-mail: aleksandrs.puckins@du.lvVides piesārņošana ar smagajiem metāliem mūsdienās ir ļoti aktuāla problēma. Tāpēcpašlaik ir pievērsta liela uzmanība, lai izstrādātu jaunas jutīgas šo vielu noteikšanasmetodes.Ņemot vērā zināmo faktu, ka metālu joni var ietekmēt fluorescentā savienojuma,ar kuru saistās, fluorescences parametrus, tika veikts pētījums, kura laikā tika noskaidrotaspektrofluorometrisko metožu pielietojuma iespējamība smago metālu detektēšanai ūdensvidē.III600400200NiCoCu0400 500 600 700 800Wavelength, nmPētījumu laikā tika uzņemti vairāki krāsvielu fluorescences intensitātes spektri, pēckuriem spriežot tika secināts, ka dažādu smago metālu klātbūtne var izraisīt dažādusefektus: gan organisko fluoroforu fluorescences pavājināšanu, gan pastiprināšanu.Pētījuma gaitā tika noskaidrots, ka ar spektroflorometriskas metodes palīdzību var veiktgan kvalitatīvo, gan kvantitatīvo dažu smago metālu noteikšanu ūdens vidē.Spektrofluorometrisko pētījumu metožu grupai ir raksturīga vesela virkne priekšrocību,kas nepiemīt pārējām analīzes metodēm un lietderīgi atšķir to no citām metodēm: zemasizmantošanas izmaksas, eksperimentu vienkāršums, metodes straujums un jūtīgums.- 14 -
Amidines of Benzanthrone as Fluorescent Sensor for Metal IonsA.I.Puchkin 1 , I.D.Ivanova 2 , E.M.Kirilova 11 Chemistry Department, Daugavpils University, 13 Vienibas str., LV-5401, Daugavpils(Latvia);2 Faculty of Chemistry, University of Latvia, 48 Valdemara str., LV-1013, Riga (Latvia).e-mail: aleksandrs.puckins@du.lvPollution of the environment by toxic metals is a major problem in the last decays due totheir increasing utilization in industry and agriculture.. These pollutants are discharged ortransported into the atmosphere and aquatic and terrestrial environments and have thepotential to reach high concentrations. Large concentrations of some metal ions have beenshown to cause brain damage, and are potentially lethal. Due to potential health risksassociated with exposure to metals, legal constraints on the allowed abundance of metalsare becoming increasingly strict.As a result of the health threats posed by some metals, new methodologies that allow fortheir simple detection and quantitation are of interest. Today many fluorescent organicsensors were designed for recognition and detection of heavy and transition metal ions.These chemosensors are compounds that incorporate a binding site, a fluorophore, and ameans of communication between the two. The interaction of a metal ion with an organicligand may result in fluorescent enhancement or fluorescence quenching.Our recent efforts have been focused largely on synthesizing novel organic fluorophoressuch as N-containing benzanthrone derivatives [1,2]. The present work focuses on thespectral characterization of benzanthronylamidines and its complexes with transitionmetal ions. Obtained results testify that investigated dyes can be used as sensitivefluorescent chemosensors for transition metals: the one of them displays positive response(3-7-fold fluorescence increasing) to the presence of Ni 2+ or Co 2+ ions, but somesynthesized amidines show negative response (quenching) in fluorescence intensity to Crions. Further investigations can lead to development of new method for the detection ofsome cations.1. E.M Kirilova, S. V Belyakov, I. Kalnina. in: G. Vayssilov, R. Nikolova (Eds), Topics inChemistry & Materials Science, Sofia: Heron Press, 3, (2009) 19-28.2. V.M. Trusova, E. Kirilova, I. Kalnina, G. Kirilov, O.A. Zhytniakivska, P.V.Fedorov, G.Gorbenko. J.Fluoresc. 22 (2012) 953-959.- 15 -
Page 1: Daugavpils UniversitāteDabaszināt
Page 4 and 5: 14.00 - 14.1514.15 - 14.3014.30 - 1
Page 6 and 7: Melanokortīna . receptora gēna po
Page 8 and 9: Synthesis and Spectroscopic Study o
Page 10 and 11: Synthesis of New Solvatochromic Dye
Page 12 and 13: Structural Investigation of Novel O
Page 16 and 17: Jaunās, uz 3-aminobenzantrona bāz
Page 18 and 19: Luminescence and Structural Propert
Page 20 and 21: The Influence Of High Temperature O
Page 22 and 23: Mycobacterium tuberculosis antibiot
Page 24 and 25: Relative quantum yieldRelative quan
Page 26 and 27: Monitoring of Free Radical Processe
Page 28 and 29: Application of Fluorescent Technolo
Page 30 and 31: Efficiency of energy transfer,%Effi
Page 32 and 33: Fluorescence Study of Cytochrome c
Page 34 and 35: ABinding of the Novel 4-tricyanovin
Page 36 and 37: New ICT-dyes for Membrane StudiesO.
Page 38 and 39: Alterations of Blood Plasma Albumin
Page 40 and 41: Functional State of Beta Adrenoreac
Page 42 and 43: Oksidatīvā stresa marķieru izmai
Page 44 and 45: Glikogēna noteikšana raugos S. ce
Page 46 and 47: Fluorescentās krāsvielas P8 izman
Page 48 and 49: Benzantrona atvasinājumu fizikāli

Dissolved organic matter in water of Daugava river

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