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1by 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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2by 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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3by 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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4by 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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5by 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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6by 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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7by 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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8by 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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9by 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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10by 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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11by 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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12by 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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13by 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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14by 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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15by 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“...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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17by 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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18by 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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19by 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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20by 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...”