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  • Your search results: "Kolev, Tsonko"
Showing 1 - 20 results of 188 for search '"Kolev, Tsonko"', query time: 1.22s Narrow search
  • 1
    Cover Image Journal Article
    Spectroscopic and structural elucidation of amino acid derivatives and small peptides: experimental and theoretical tools
    by Kolev, Tsonko   Kolev, Tsonko   Spiteller, Michael   Spiteller, Michael   Koleva, Bojidarka   Koleva, Bojidarka Published in Amino acids (01.01.2010)
    “...This mini review deals with the modern aspects of the spectroscopy and structural elucidation of amino acid derivatives and small biologically active...”
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  • 2
    Cover Image Journal Article
    Structural and Spectroscopic Elucidation of Tetrapetide Glycyl-L-Prolyl-Glycyl-Glycine and Its Hydrogensquarate
    by Tsonko Kolev Published in Protein and peptide letters (01.07.2008)
    “...The IR-spectroscopic and structural elucidation of tetrapeptide glycyl-L-prolyl-glycyl-glycine and its hydrogensquarate was performed by employing...”
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  • 3
    Cover Image Journal Article
    Polarized spectroscopic elucidation of N-acetyl-l-cysteine, l-cysteine, l-cystine, l-ascorbic acid and a tool for their determination in solid mixtures
    by Koleva, Bojidarka   Koleva, Bojidarka   Spiteller, Michael   Spiteller, Michael   Kolev, Tsonko   Kolev, Tsonko Published in Amino acids (01.01.2010)
    “...Method of linear polarized vibrational (both IR- and Raman) spectroscopy of oriented colloids in nematic host is applied on N-acetyl-l-cysteine, l-cysteine,...”
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  • 4
    Cover Image Journal Article
    Tyrammonium 4-nitrophthalate dihydrate: structural and spectroscopic elucidation
    by Kolev, Tsonko   Kolev, Tsonko   Koleva, Bojidarka B   Koleva, Bojidarka B   Seidel, Rüdiger W   Seidel, Rüdiger W   Mayer-Figge, Heike   Mayer-Figge, Heike   Spiteller, Michael   Spiteller, Michael   Sheldrick, William S   Sheldrick, William S Published in Amino acids (01.01.2009)
    “...Tyrammonium 4-nitrophthalate has been synthesized and its structural and spectroscopic properties elucidated by single-crystal X-ray diffraction, solid-state...”
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  • 5
    Cover Image Journal Article
    Synthesis, spectroscopic analysis and structure deduction of gold(III), palladium(II) and platinum(II) complexes with the tripeptide glycyl-l-phenylalanyl-glycine
    by Koleva, Bojidarka B   Kolev, Tsonko   Lamshöft, Marc   Spiteller, Michael Published in Transition metal chemistry (Weinheim) (01.10.2008)
    “...The coordination behaviour of the tripeptide glycyl-l-phenylalanyl-glycine (H-Gly-Phe-Gly-OH) with Au(III), Pd(II), and Pt(II) in both solution and in the...”
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  • 6
    Cover Image Journal Article
    2-(Phenylethyl)ammonium hydrogensquarate hemihydrate: crystal structure, solid-state IR-spectroscopic and theoretical characterization
    by Ivanova, Bojidarka B   Seidel, Rüdiger W   Kolev, Tsonko   Sheldrick, William   Spiteller, Michael Published in Amino acids (01.06.2010)
    “...The title compound, 2-(phenylethyl)ammonium hydrogensquarate hemihydrate, was synthesized and structurally and spectroscopically characterized by a single...”
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  • 7
    Cover Image Journal Article
    L-Leucinamide hydrogensquarate: spectroscopic and structural elucidation
    by Kolev, Tsonko   Zareva, Sonya   Mayer-Figge, Heike   Spiteller, Michael   Sheldrick, William S   Koleva, Bojidarka B Published in Amino acids (01.10.2009)
    “...The hydrogensquarate [LeuNH(2)] (HSq) of L-leucinamide has been synthesized and its structure has been determined by single crystal X-ray diffraction. A three...”
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  • 8
    Cover Image Journal Article
    Stabilization of Neutral NH2-R-COOH Form of the Antihypertensive Peptides L-Valyl-L-Prolyl-L-Proline and L-Isoleucyl-L-Prolyl-L-Proline
    by Tsonko Kolev   Bojidarka Koleva   Ivanka Stoineva   Boryana Jakimova   Bojidar Tchorbanov Published in Protein and peptide letters (01.02.2009)
    “...Spectroscopic and structural elucidation of the peptides L-Valyl-L-Prolyl-L-Proline (1) and L-Isoleucyl-L-Prolyl- L-Proline (2) are reported on the basis of...”
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  • 9
    Cover Image Journal Article
    Solid‐state IR–LD spectroscopic and theoretical analysis of arginine‐containing peptides
    by Kolev, Tsonko Published in Biopolymers (01.09.2006)
    “...Structural prediction and IR‐characteristic bands assignment of arginine‐containing tri‐ and tetrapeptides glycyl‐glycyl‐arginine (GGArg) and...”
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  • 10
    Cover Image Journal Article
    Synthesis, spectroscopic and structural elucidation of sympathomimetic amine, tyraminium dihydrogenphosphate
    by Kolev, Tsonko M   Kolev, Tsonko M   Koleva, Bojidarka B   Koleva, Bojidarka B   Spiteller, Michael   Spiteller, Michael   Sheldrick, William S   Sheldrick, William S   Mayer-Figge, Heike   Mayer-Figge, Heike Published in Amino acids (01.02.2009)
    “...The synthesis, isolation, spectroscopic and structural elucidation of sympathomimetic amine, tyramine dihydrogenphosphate are of interest due to its biological...”
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  • 11
    Cover Image Journal Article
    l‐Argininamidium bis­(hydrogen­squarate)
    by Kolev, Tsonko   Spiteller, Michael   Sheldrick, William S   Mayer‐Figge, Heike Published in Acta crystallographica. Section C, Crystal structure communications (01.05.2006)
    “...Cations and anions of the title compound {systematic name: 1‐[4‐(amino­carbonyl)butyl]guanidinium bis­(hydrogen­squarate)}, C6H17N5O2+·2C4HO4−, are connected...”
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  • 12
    Cover Image Journal Article
    Synthesis, spectroscopic and structural elucidation of tyrosinamide hydrogensquarate monohydrate
    by Kolev, Tsonko M   Kolev, Tsonko M   Koleva, Bojidarka B   Koleva, Bojidarka B   Spiteller, Michael   Spiteller, Michael   Sheldrick, William S   Sheldrick, William S   Mayer-Figge, Heike   Mayer-Figge, Heike Published in Amino acids (01.02.2009)
    “...Synthesis, isolation, spectroscopic and structural elucidation of tyrosinamide hydrogensquarate monohydrate (I) is reported on the basis of quantum chemical...”
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  • 13
    Cover Image Journal Article
    Crystal structure and spectroscopic properties of 4-acetaminopyridine and its protonated form
    by Koleva, Bojidarka   Nikolova, Rositsa   Tchapkanov, Atanas   Kolev, Tsonko   Mayer-Figge, Heike   Spiteller, Michael   Sheldrick, William Published in Polish journal of chemical technology (01.01.2009)
    “...Crystal structure and spectroscopic properties of 4-acetaminopyridine and its protonated form 4-Acetaminopyridine dihydrate and its protonated form, stabilized...”
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  • 14
    Cover Image Journal Article
    2‐(3‐Benzoyl‐1‐pyridinio)‐3,4‐dioxocyclo­butenolate
    by Kolev, Tsonko   Yancheva, Denitsa   Shivachev, Boris   Petrova, Rosica   Spiteller, Michael Published in Acta crystallographica. Section C, Crystal structure communications (01.04.2005)
    “...The title compound, C16H9NO4, also known as the 3‐benzoyl­pyridinium betaine of squaric acid, exhibits a dipolar electronic ground‐state structure with a...”
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  • 15
    Cover Image Journal Article
    Influence of intermolecular hydrogen bonding on IR-spectroscopic properties of ( R)-(−)-1-phenylglycinium hydrogen squarate monohydrate in solid-state. IR-LD, Raman spectroscopy an...
    by Kolev, Tsonko Published in Journal of molecular structure (2007)
    “...Influence of the intermolecular interactions in solid phase on the overlapped IR-spectroscopic pattern of ( R)-(−)-1-phenylglycinium hydrogen squarate...”
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  • 16
    Cover Image eBook
    Linearly Polarized IR Spectroscopy: Theory and Applications for Structural Analysis
    by Kolev, Tsonko   Ivanova, Bojidarka
    2011
    “...A technique that is useful in the study of pharmaceutical products and biological molecules, polarization IR spectroscopy has undergone continuous development...”
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  • 17
    Cover Image Journal Article
    Comparing of the crystal structure and spectroscopic properties of some stilbazolium dyes with enlarged π-conjugated system I. Chromophores with p-dimethylamino group
    by Bakalska, Rumyana   Todorova, Mina   Sbirkova, Hristina   Shivachev, Boris   Kolev, Tsonko Published in Dyes and pigments (01.01.2017)
    “...A comparative study of the structures and spectroscopic properties of two styrylquinolinium dyes:...”
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  • 18
    Cover Image Journal Article
    N,N‐Diethyl‐N′‐[(E)‐4‐pyridylmethylene]benzene‐1,4‐diamine: a combined X‐ray and density functional theory study
    by Seidel, Rüdiger W   Sheldrick, William S   Kolev, Tsonko M   Koleva, Bojidarka B Published in Acta crystallographica. Section C, Crystal structure communications (01.08.2009)
    “...The crystal structure of the title compound, C16H19N3, comprises neutral molecules of a dipolar Schiff base chromophore. A density functional theory (DFT)...”
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  • 19
    Cover Image Journal Article
    Comparing of the crystal structure and spectroscopic properties of some stilbazolium dyes with enlarged [pi]-conjugated system I. Chromophores with p-dimethylamino group
    by Bakalska, Rumyana   Todorova, Mina   Sbirkova, Hristina   Shivachev, Boris   Kolev, Tsonko Published in Dyes and pigments (01.01.2017)
    “...A comparative study of the structures and spectroscopic properties of two styrylquinolinium dyes:...”
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  • 20
    Cover Image Journal Article
    Synthesis, crystal structure, and spectroscopic properties of new stilbazolium salt with enlarged π-conjugated system
    by Todorova, Mina   Bakalska, Rumyana   Kolev, Tsonko Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (01.05.2013)
    “...[Display omitted] ► New stilbazolium dye was synthesed. ► Single crystal X-ray analyses was performed and the structure was solved. ► The dye was investigated...”
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