48 results on '"Kolev, Tsonko"'
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2. On the structures of free-base lepidine and some mineral acid salts
3. Comparing of the crystal structure and spectroscopic properties of some stilbazolium dyes with enlarged π-conjugated system I. Chromophores with p-dimethylamino group
4. New structural motif of hydrogensquarate anions in the presence of dl-Serinium cation. Spectral and structural elucidation
5. Synthesis, crystal structure, and spectroscopic properties of new stilbazolium salt with enlarged π-conjugated system
6. Crystal structures and spectroscopic properties of ester amide and diamide of squaric acid with prolinamide
7. Esters of 1-coumarinylbenzylphosphonic acid—IR-spectroscopic and theoretical elucidation
8. Structural elucidation, optical, magnetic and nonlinear optical properties of oxystyryl dyes
9. Hydrogenoxalate and squarate salts of ( E)-4-(hydroxyiminomethyl)-pyridine – Crystal structures, spectroscopic and theoretical elucidation
10. New structural motifs and properties of squaric acid anions in the presence of the l-lysinium counterion
11. Synthesis, spectroscopic and structural elucidation of 3-ethylamino-2-(4-nitro-benzoyl)-but-2-enoic acid phenylamide
12. Spectroscopic and structural elucidation of merocyanine dye 2,5-[1-metyl-4-[2-(4-hydroxyphenyl)ethenyl)]piridinium]-hexane tetraphenylborate: Aggregation processes
13. Monoclinic and triclinic polymorphs of 2-{5,5-dimethyl-3-[2-(2,4,6-trimethoxyphenyl)vinyl]cyclohex-2-enylidene}malononitrile—Solid-state linear-polarized IR-spectroscopy, DFT calculations and vibrational analysis
14. Spectroscopic and structural elucidation of 4-dimethylaminopyridine and its hydrogensquarate
15. The aggregation of the merocyanine dyes, depending of the type of the counterions
16. Determination of phenacetin and salophen analgetics in solid binary mixtures with caffeine by infrared linear dichroic and Raman spectroscopy
17. Nonlinear optical properties of pyridinium-betaines of squaric acid: Experimental and theoretical study
18. The crystal structure and optical properties of 1-methyl-4-[2-(4-hydroxyphenyl)ethenyl]pyridinium dihydrogenphosphate: New aspects on crystallographic disorder and its effect on polarized solid-state IR spectra
19. Bis(tyrammonium) sulfate dihydrate: Crystal structure, solid-state IR-spectroscopic and theoretical characterization
20. Synthesis, spectroscopic, structural and theoretical characterization of hydrogensquarate and mononuclear Au(III)-complex of dipeptide phenylalanyltyrosine
21. Spectroscopic and structural elucidation of 3,4-diaminopyridine and its hydrogentartarate salt: Crystal structure of 3,4-diaminopyridinium hydrogentartarate dihydrate
22. Benzamidinium d-glucuronate: Spectroscopic and structural elucidation
23. Synthesis, spectroscopic and theoretical study of isoquinoline alkaloid dehydrosalsolinol base and its triacetylated derivative
24. Spectroscopic and structural elucidation of alanyl-containing dipeptides and their hydrogensquarates
25. Synthesis, spectroscopic, thermal and structural elucidation of 5-amino-2-methoxypyridine ester amide of squaric acid ethyl ester: A new material with an infinite pseudo-layered structure and manifested NLO application
26. Spectroscopic and structural elucidation of l-tyrosine-containing dipeptides valyl-tyrosine and tyrosyl-alanine: Solid-state IR-LD spectroscopy, quantum chemical calculations and vibrational analysis
27. Linear-dichroic infrared spectral (IR-LD) analysis of codeine and its derivatives
28. Influence of intermolecular hydrogen bonding on IR-spectroscopic properties of ( R)-(−)-1-phenylglycinium hydrogen squarate monohydrate in solid-state. IR-LD, Raman spectroscopy and theoretical study
29. IR-LD spectral and theoretical analysis of l-tyrosinamide hydrochloride monohydrate
30. Solid-state linear polarized IR-spectroscopic and theoretical analysis of methioninamide ester amide of squaric acid diethyl ester
31. Spectral and structural study of two acceptor-substituted pyridinium-betaines of squaric acid: Promising chromophores for nonlinear optical applications
32. 6-O-acetylcodeine and its hydrogensquarate: Linear-dichroic infrared (IR-LD) spectroscopy
33. Epoxidation of alkenes in the presence of molybdenum–squarate complexes as novel catalysts
34. Experimental and computational studies of the structure and vibrational spectra of aminomethyl-dimethyl-phosphine oxide and its [formula omitted] labeled isomer
35. Preparation and use of novel molybdenum-containing organic complexes as catalysts in the epoxidation of cyclohexene: II. Synthesis and applicability of molybdenum complexes based on squaric acid, 1-phenyl-1-ethanamine and 1,3-diamino-2-propanol
36. Experimental and computational studies of the structure and vibrational spectra of 4-dimethylamino pyridinium-betaine of squaric acid
37. Experimental and computational studies of the structure and vibrational spectra of pyridinium-betaine of squaric acid
38. Experimental and computational studies of the structure and vibrational spectra of 2-[5,5-dimethyl-3-(2-phenyl-vinil)-cyclohex-2-enylidene]-malononitrile
39. Preparation and use of novel molybdenum-containing organic complexes as catalysts in the epoxidation of cyclohexene
40. Vibrational spectra and structure of benzil and its 18O- and d 10-labelled derivatives: a quantum chemical and experimental study
41. Vibrational spectra and structure of benzophenone and its 18O and d 10 labelled derivatives: an ab initio and experimental study
42. Vibrational spectra of 3-benzylidenephthalide and its 18O-labelled derivative
43. Determination of cephalosporins in solid binary mixtures by polarized IR- and Raman spectroscopy
44. Quantification of the push–pull character of the isophorone chromophore as a measure of molecular hyperpolarizability for NLO applications
45. Vibrational spectra of 2-phenyl-indane-1,3-dione, its isotopic labelled derivatives and the corresponding carbanions
46. Vibrational assignment of para-dimethylaminobenzil and its 18O-substituted derivative
47. Vibrational assignment of N-benzylphthalimide and 15N-benzylphthalimide
48. Vibrational assignment of in- and out-of-plane modes of some aromatic and arylaliphatic ketones
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