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•1953 Born in Sofia, Bulgaria.
•1971-1976 Study in the Sofia University, Faculty of Chemistry – Master of Science in Chemistry.
•1976-1987 Research Associate at Institute of Organic Chemistry with Centre of Phytochemistry (IOCCP).
•1982-1987 PhD Thesis work in the Institute for Theoretical and Radiation Chemistry of the Vienna University and in IOCCP.
•1987 PhD at IOCCP, Bulgarian Academy of Sciences.
•1987-2000 Senior Research Associate at IOCCP.
•2001 Attainment of academic rank Associate Professor in Organic Chemistry at IOCCP .
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Expertise |
Application of UV-VIS absorption and luminescent spectroscopy in different media, as well as computational methods for:
• study of the relationship between the chemical and electronic structure of conjugated organic compounds;
• investigations of radiative and nonradiative deactivation processes of electronically excited states of organic luminophores;
• photophysical and photochemical characterization of organic compounds containing heteroatoms with possible application as fluorescent laser dyes, pH indicators and fluorescent markers for biopolymers.
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Current Research |
Photophysical investigations of heteroaromatic organic compounds with desired properties for application in nanotechnology and in information and communication technologies, namely as fluorescent markers for nanoparticles of different nature and size and OLEDs. |
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Visiting Fellowships |
•Institute of Theoretical and Radiation Chemistry, University of Vienna (Austria) –
group of Prof. Nikola Getoff, Prof. Gotfried Koehler - 1982, 1984, 1986, 1989, 1993.
•Institute of Organic Synthesis, Pardubice-Ribitvy (Chechoslovakia) – group of
Prof. Miclos Nepras – 1989.
•Karolinska Institutet, Stockholm (Sweden), group of Assoc. Prof. Andrey Karshikoff – 2000.
•University of Siegen (Germany), group of Prof. Karl-Heinz Drexhage - 2001. |
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Membership in Scientific Organizations
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• Member of the Union of Chemists in Bulgaria.
• Founding Member of the non-profit legal entity "Bulgarian Society for Organic and Metaloorganic Chemistry", founded in March 2004 with the purpose to disseminate scientific results and to support young scientists.
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Selected Publications |
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• T.Deligeorgiev, D.Zaneva, I.Petkov, I.Timtcheva, R.Sabnis
“Synthesis and properties of fluorescent
bis-quaternized perylene dyes”
Dyes and Pigments 24 (1994) 75-81
• G.Kohler, Sn.Bakalova, N.Getoff, P.Nikolov, I.Timtcheva “Radiationless deactivation of 5-amino-2-arylindan-
1,3-diones via intermolecular hydrogen bonds”
J.Photochem.Photobiol. A:Chemistry 81 (1994) 73-77
• I.Timtcheva, A.Pentchev, St.Metsov, Sn.Bakalova, V.Koleva, P.Nikolov
“Unsymmetrical azines of 4-acetyl-
3-methyl-1-phenyl-5-pyrazolone. Spectral characteristics and structure”
Dyes and Pigments 28 (1995) 131-138
• I.Petkov, T.Deligeorgiev, I.Timtcheva “Effect of the medium acidity on the photophysical characteristics
of some 2-aryl- and 2-hetaryl-benzothiazoles”
Dyes and Pigments 35 (1997) 171-181
• I.Timtcheva, P.Nikolov, N.Stojanov, St.Minchev
“Deactivation processes of the excited states of
3-hetarylmethylene-1(3H)-isobenzofuranones in solution: possibility of the formation of intermolecular hydrogen bonds”
J.Photochem.Photobiol. A:Chemistry 101 (1996) 145-150
• I.Timtcheva, V.Maximova, T.Deligeorgiev, N.Gadjev, R.Sabnis, I.Ivanov
“Fluorescence spectral characteristics of novel asymmetric monomethine cyanine dyes in nucleic acid solution”
FEBS Letters 405 1997( 141-144)
• I.Timtcheva, V.Maximova, T.Deligeorgiev, D.Zaneva, I.Ivanov, “New Asymmetric Monomethine Cyanine Dyes for Nucleic Acids Labeling”
J.Photochem.Photobiol. A:Chemistry 130 (2000) 7 – 11
• I.Timtcheva, V.Maximova, T.Deligeorgiev, N.Gadjev, K.H.Drexhage, I.Petkova
“Homodimeric Monomethine Cyanine Dyes as Fluorescent Probes of Biopolymers”
J.Photochem.Photobiol. B:Biology 58 (2000) 130-135
• T. Deligeorgiev, V. Maximova, I. Timtcheva, N. Gadjev, Karl-Heinz Drexhage
“Fluorescence Characteristics of Variously Charged Asymmetric Monomethine Cyanine Dyes in the Presence of Nucleic Acids”
J.Fluorescence, v.12 (2) (2002) 225-229
• L. Viteva, Tz. Gospodova, Y. Stefanovsky, K. Petrova,I. Timtcheva, M.-R. Mazieres, J.-G. Wolf, “Organometalics in the Cyanine Chemistry. Synthesis, Reactivity and Photophysical Properties of Some HeptamethineMerocyanine Dyes”
Eur.J.Org.Chem. (2004), 385-394
• S. Bakalova, A. Gil, Santos, I. Timtcheva, J. Kaneti, I.Filipova, G. Dobrikov, V. Dimitrov
“Electronic Absorption and Emission Spectra and Computational Studies of Some 2-Aryl, 2-Styryl, and
2-(4’-Aryl)Butadienyl Quinazolin-4-Ones”
J.Mol.Struct. (Theochem) 710 (2004), 3102-3114
• N. Markova, V. Enchev, I.Timtcheva
“Oxo-Hydroxy Tautomerism of 5-Fluorouracil in Water Solution: Solvent-Depended Mechanism”
J.Phys.Chem. A 109 (2005), 1981-1988
• T. Deligeorgiev, N.Gadjev, A.Vasilev, V.Maximova, I.Timtcheva, H. Katerinoupolos, G.Tsikalas
“Synthesis and Properties of Novel Asymmetric Monomethine Cyanine Dyes as Non-Covalent Labels for Nucleic Acids”
Dyes and Pigments 75 (2007), 466-473
• L. Viteva, Tz. Gospodova, J. Rashkova, I. Abrahams, I. Timtcheva, Sv. Simova, M. R. Mazieres, J. G. Wolf
“Synthesis and Photophysical Properties of Some Rigidized Hepta- and Nonamethine Mono- and
Bis-(merocyanines): Ring Opening of Quaternized 2-Methylbenzothiazole”
Eur.J.Org.Chem. (2007), 3102 – 3114
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