Kiril Gavazov

Assoc. Prof., Ph.D.

 

 

Address: Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 120 Buxton Brothers St, Plovdiv, BULGARIA 

E-mail: kgavazov@abv.bg

ORCID ID: https://orcid.org/0000-0002-1360-8977

 

Contents of this Web Page

1.  CV

2.  Scientific papers

3.  Best photos

 

Curriculum vitae

 

Date of birth: 16th October, 1968

 

Place of birth: Plovdiv, Bulgaria

 

Marital Status: Married. One child

Nationality: Bulgarian

EDUCATION

 

EMPLOYMENT

 

Membership:

American Chemical Society logo.svgRoyal Society of Chemistry

Avocations: hiking [click here to see my best photos], map-making

Foreign Languages: English, Russian

 

Scientific papers

 

1.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Study of the System Vanadium(V) - 4-(2-Pyridylazo)Resorcinol - 2,2',5,5'-Tetraphenyl-3,3'-(p-biphenyl)ditetrazolium Chloride - Water - Chloroform. Determination of Vanadium in Steels, Analytical Laboratory 7 (3) (1998) 127-133. [abstract]

2.      Z. Simeonova, K. Gavazov, A. Alexandrov, Ternary Complex of Vanadium(V) with 4-Nitrocatechol and Tetrazolium Salt and its Application to Extraction-spectrophotometric Determination of Vanadium(V) in Steels, Analytical Laboratory 7 (4) (1998) 184-188. [abstract]

3.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Study on the Complex Formation in the Vanadium(V) - Pyrogallol - Neotetrazolium Chloride System, Collection of papers presented at the jubilee scientific session 50th anniversary of the union of scientists in Bulgaria - Plovdiv, Union of Scientists in Bulgaria - Plovdiv, Vol. 3, Academic Publishing House of the Higher Institute of Agriculture - Plovdiv, pp.189-192 (in Bulgarian).

4.      Z. Simeonova, K. Gavazov, A. Alexandrov, Extraction Studies in the System Vanadium(V) - 4-(2-Pyridylazo)resorcinol (PAR) - 2-(4-Iodophenyl)-3-(4-nitrophenyl)-5-phenyl-tetrazolium chloride (INT) - Water - Chloroform, Russ. J. Inorg. Chem. 44(4) (1999) 621-625. [abstract]

5.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Study of Ternary Ion-Association Complexes of Vanadium(IV) with Pyrogallol and Tetrazolium Salts, Russ. J. Inorg. Chem. 45(1) (2000) 133-138. [abstract]

6.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction Spectrophotometric Determination of Vanadium in Natural Waters and Aluminium Allous Using Pyridyl Azo Resorcinol (PAR) and Iodo-Nitro-Tetrazolium Chloride (INT), Talanta 52(3) (2000) 539-544. [abstract]

7.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Study of the System Vanadium(V) - Pyrogallol - Iodo-Nitro-Tetrazolium Chloride - Water - n-Butanol, Russ. J. Inorg. Chem. 46(3) (2001) 427-431. [abstract]

8.      K. Gavazov, Z. Simeonova, A. Alexandrov, Ternary Complexes of Vanadium(V) with 4-Nitrocatechol and Neotetrazolium Chloride. Extraction-Spectrophotometric Study, University of Plovdiv 'Paissii Hilendarski' - Bulgaria, Scientific works. Chemistry 31(5) (2002) 5-11.
[full text]

9.      K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Determination of Vanadium in Steels Using 4-Nitrocatechol and Neotetrazolium Chloride, University of Plovdiv 'Paissii Hilendarski' - Bulgaria, Scientific works. Chemistry 31(5) (2002) 13-16 (in Bulgarian, abstract in English). [full text]

10.  K. Gavazov, Z. Simeonova, A. Alexandrov, Extraction-Spectrophotometric Study of the System Vanadium(V) - 4-(2-Pyridylazo)resorcinol (PAR) - Tetrazol violet (TV) - Water - 1,2-Dichloroethane, Journal of the University of Chemical Technology and Metallurgy 38(3) (2003) 909-916. [abstract]

11.  K. Gavazov, Z. Simeonova, Extraction-Spectrophotometric Study of the System Vanadium(V) - 4-(2-Thiazolylazo)resorcinol (TAR) - Triphenyltetrazolium chloride (TTC) - Water - Chloroform, University of Plovdiv 'Paissii Hilendarski' - Bulgaria, Scientific works. Chemistry 32(5) (2004) 15-20. [full text]

12.  Z. Simeonova, K. Gavazov, A. Alexandrov, Extraction-Spectrophotometric Study of the Complex Formation in the System Vanadium(IV) - 4-Nitrocatechol - Iodonitrotetrazolium Chloride - Water - Chloroform, University of Plovdiv 'Paissii Hilendarski' - Bulgaria, Scientific works. Chemistry 33(5) (2005) 5-9. [full text]

13.  A. Dimitrov, V. Lekova, K. Gavazov, B. Boyanov, Investigation of the Extraction Equilibrium of Ion-association Complexes of Molybdenum(VI) with Some Polyphenols and Thiazolyl Blue. Extraction-Spectrophotometric Determination of Molybdenum, Cent. Eur. J. Chem. 3(4), (2005) 747-755. [abstract] [full text]

14.  K. Gavazov, G. Patronov, Extraction-Spectrophotometric Determination of Vanadium in Catalysts with Azoderivatives of Resorcinol and Tetrazolium Salts, Scientific Researches of the Union of Scientists - Plovdiv, Series C. Technics and Technologies, Vol. 5, (S. Vassilev, Ed.), Balkan Conference of Young Scientists, 16-18 June 2005, Plovdiv, p. 290-295. [abstract] [full text]

15.  Z. Simeonova, K. Gavazov, A. Alexandrov, Extraction-Spectrophotometric Study on the System Vanadium(V) - 2,3-Dihydroxynaphthalene - Iodonitrotetrazolium Chloride - Water - Chloroform and Its Analytical Application, Cent. Eur. J. Chem. 4(2), (2006) 258-266. [abstract] [full text]

16.  K. Gavazov, V. Lekova, G. Patronov, M. Tǔrkyilmaz, Extractive-Spectrophotometric Determination of Vanadium(IV/V) in Catalysts using 4-(2-Pyridylazo)-resorcinol and Tetrazolium Violet, Chem. Anal. (Warsaw) 51, (2006), 221-227. [abstract] [full text]

17.  K. Gavazov, V. Lekova, A. Dimitrov, Extraction-Spectrophotometric Determination of Molybdenum, Tungsten and Vanadium in Products of Ferrous Metallurgy as Ternary Complexes with Polyphenols and Tetrazolium Salts, 13th International Metallurgy and Materials Congress, 9-12 November 2006, Istanbul, Turkey, Abstracts Book, p.180; CD E-book pp. 1305-1312. [abstract]

18.  V. Lekova, K. Gavazov, A. Dimitrov, A Ternary Complex of Tungsten(VI) with 4-Nitrocatechol and Thiazolyl Blue and Its Application for Extraction-spectrophotometric Determination of Tungsten, Chem. Papers 60(4), 2006, 283-287. [abstract]

19.  K. Gavazov, V. Lekova, G. Patronov, A Ternary Complex of Vanadium(V) with 4-(2-Pyridylazo)-resorcinol and Thiazolil Blue and its Application, Acta Chim. Slov., 53(4), 2006, 506-511. [full text]

20.  K. Gavazov, V. Lekova, A. Dimitrov, Extraction Studies on the System Vanadium(V) - 4-(2-Thiazolylazo)-resorcinol - Neotetrazolium Chloride - Water - Chloroform, J. Univ. Chem. Tech. Met. 41(2), (2006), 217-220. [full text]

21.  K. Gavazov, A. Dimitrov, V. Lekova, E. Karaasenova, Is There a Linear Relationship Between the Molecular Mass of Tetrazolium Cations and the Stability of their Ion-association Complexes?, University of Plovdiv Paissii Hilendarski - Bulgaria, Scientific works. Chemistry) 34(5) (2006) 19-27 (in Bulgarian). [full text]

22.  K. Gavazov, V. Lekova, A. Dimitrov, Complex Formation and Extraction in the Vanadium(IV) - 4-Nitrocatechol - Neotetrazolium Chloride - Water - Organic Solvent System, Union of Scientists in Bulgaria, National Scientific Conference with International Participation under the heading 20 Years Union of Scientists in Bulgaria - Branch Smolyan, October, 20th-21th, 2006, Scientific papers ISBN 978-954-8329-87-3, pp. 808-819. [full text]

23.  A. Dimitrov, V. Lekova, K. Gavazov, B. Boyanov, Ternary Complex of Molybdenum(VI) with 4-Nitrocatechol and Tetrazolium Blue Chloride and its Application to Extraction-Spectrophotometric Analysis of Ferrous Metallurgy Products, J. Anal. Chem. 62(2), 2007, 122-125. [abstract]

24.  K. Gavazov, V. Lekova, A. Dimitrov, G. Patronov, The Solvent Extraction and Spectrophotometric Determination of Vanadium(V) with 4-(2-Thiazolylazo)-resorcinol and Tetrazolium Salts, Cent. Eur. J.Chem. 5(1), (2007), 257-270. [full text]

25.  V. Lekova, K. Gavazov, A. Dimitrov, P. Racheva, Extraction-Spectrophotometric Study on the Vanadium(V) - 2,3-Dihydroxynaphtalene - Tetrazolium Violet - Water - Chloroform System, Scientific Researches of the Union of Scientists Plovdiv, Ser. C, Vol. 6, Plovdiv 2007, pp. 171-174. [full text]

26.  K.Gavazov, V. Lekova, A. Dimitrov, The Use of Tetrazolium Salts in Inorganic Analysis, Russian Chemical Reviews 76(2), (2007) 169-179. [abstract]

27.  K. Gavazov, M. Tǔrkyilmaz, Ö. Altun, Extractive-Spectrophotometric Investigations on Ternary Ion-Associated Complexes between the Vanadium(V) - 4-(2-Pyridylazo)-resorcinol Anionic Chelate and Some Methoxybis(tetrazolium) Cations. Bulg. Chem. Commun. 40(1) (2008) 65-69. [abstract]

28.  P. Racheva, K. Gavazov, V. Lekova, A. Dimitrov, Vanadium(IV,V) Speciation with a Catechol Derivative and a Tetrazolium Salt, Journal of the Iranian Chemical Research, 1(2), 2008, 113-121. [full text]

29.  P. Racheva, K. Gavazov, V. Lekova, A. Dimitrov, Extraction Study on the Colour Reaction for Vanadium(IV) with the 4-Nitrocatechol (NC) - Thiazolyl Blue Tetrazolium (MTT) - Water - Chloroform System, University of Plovdiv Paissii Hilendarski - Bulgaria, Scientific works. Chemistry 36(5), 2008, 39-44. [full text]

30.  K. Gavazov, V. Lekova, B. Boyanov, A. Dimitrov, DTA and TGA Study of Some Tetrazolium Salts and their Ion-association Complexes with the Molybdenum(VI) - 4-Nitrocatechol Anionic Chelate, Journal of Thermal Analysis and Calorimetry 96(1), 2009, 249-254. [abstract]

31.  P. Racheva, K. Gavazov, V. Lekova, A. Dimitrov, Extraction Equilibria and Spectrophotometric Determination of Vanadium(V) with 4-Nitrocatechol and the Ion-pair Reagent Thiazolyl Blue Tetrazolium, J. Anal. Chem. 65(1), 2010, 21-25. [abstract]

32.  Fatma Genҫ, Murat Türkyilmaz, K. Gavazov, Ternary Ion-Associated Complexes of Vanadium(IV) with 4-(2-Pyridylazo)-Resorcinol and Tetrazolium Salts. Liquid-Liquid Extraction and Spectrophotometric Investigations, Scientific Research of the Union of Scientists in Bulgaria - Plovdiv, Series B. Natural Sciences and Humanities, Vol. XII, pp. 85-90, ISSN 1311-9192, International Conference of Young Scientists, 18-19 June 2009, Plovdiv [full text]

33.  Fatma Genҫ, K. Gavazov, Murat Türkyilmaz, Ternary complexes of vanadium(IV) with 4-(2-pyridylazo)-resorcinol (PAR) and ditetrazolium chlorides (DTC), Cent. Eur. J.Chem. 8(2), (2010), 461-467. [abstract] [full text]

34.  P. Racheva, V. Lekova, T. Stefanova, A. Dimitrov, K. Gavazov, Complex Formation and Liquid-Liquid Extraction in the Niobium(V) - 4-Nitrocatechol - Thiazolyl Blue Tetrazolium System, University of Plovdiv Paissii Hilendarski - Bulgaria, Scientific works. Chemistry 37(5), 2010, 33-41. [full text]

35.  V. Lekova, P. Racheva, K. Stojnova, A. Dimitrov, K. Gavazov, Ternary complexes of niobium(V) with nitroderivatives of catechol and tetrazolium salts. Extraction-spectrophotometric investigations, Chemija 21(2-4), 2010, 106-111. [full text]

36.  K. Gavazov, P. Racheva, Ternary complexes of vanadium(IV) with 4-(2-thiazolylazo)resorcinol and tetrazolium chlorides, Asian Chem. Lett. 15(1-2), 2011, 77-84. [full text]

37.  G. Toncheva, K. Gavazov, V. Lekova, K. Stojnova, A. Dimitrov, Ternary Ion-association complexes between the indium(III) - 4-(2-pyridylazo)resorcinol anionic chelate and some tetrazolium cations, Cent. Eur. J. Chem. 9(6), 2011, 1143-1149. [abstract] [full text]

38.  K. B. Gavazov, Nitroderivatives of Catechol: from Synthesis to Application, Acta Chim. Slov. 59(1), 2012, 1-17 [full text]

39.  K. B. Gavazov, P. Racheva, V. Lekova, A. Dimitrov, M. Tǔrkyilmaz, F. Genҫ, Some Ternary Phenylmethoxybis(tetrazolium) Complexes of Vanadium(IV,V) and Their Constants of Association, Croatica Chem. Acta, 85(1), 2012, 53-58. [full text]

40.  K. Stojnova, K. B. Gavazov, Complex Formation in a Liquid-Liquid Extraction System Containing Gallium(III), 4-(2-Pyridylazo)resorcinol and Thiazolyl Blue Tetrazolium, Journal of Materials Science and Engineering, Sec. A, 2(5), 2012, 423-429. [full text]

41.  K. Stojnova, K. B. Gavazov, G. Toncheva, V. Lekova, A. Dimitrov, Extraction-Spectrophotometric Investigations on Two Ternary Ion-Association Complexes of Gallium, Cent. Eur. J. Chem., 10(4), 2012, 1262-1270 [abstract] [full text]

42.  T. S. Stefanova, G. K. Toncheva K. B. Gavazov, Complex Formation in a Liquid-Liquid Extraction System Containing Indium(III), 4-(2-Pyridylazo) Resorcinol and Neotetrazolium Chloride, Chemistry Journal, 2(4), 2012, 146-152. [full text]

43.  K. B. Gavazov, K. T. Stojnova, T. S. Stefanova, G. K. Toncheva, V. D. Lekova, A. N. Dimitrov, Liquid-Liquid Extraction and Spectrophotometric Characterization of Some New Ternary Ion-Association Complexes of Gallium(III) and Indium(III), Chemija, 23(4), 2012, 278-285. [full text]

44.  T. S. Stefanova, K. B. Gavazov, Phenylmethoxybis(tetrazolium) Ion-Association Complexes with an Anionic Indium(III) - 4-(2-Pyridylazo)resorcinol Chelate, Cent. Eur. J. Chem. 11(2), 2013, 280-289 [abstract] [full text]

45.  P.V. Racheva, K. B. Gavazov, V. D. Lekova, A. N. Dimitrov, Complex Formation in a Liquid-Liquid Extraction System Containing Cobalt(II), 4-(2-Pyridylazo)resorcinol, and Nitron, Journal of Materias, Volume 2013, Article ID 897343, 7 pages, http://dx.doi.org/10.1155/2013/897343. [full text]

46.  K. B. Gavazov, Extraction-Spectrophotometry of Ion-Association Complexes, Chemistry: Bulgarian Journal of Science Education, 22(2), 2013, 222-253. [abstract]

47.  V. V. Divarova, K. B. Gavazov, V. D. Lekova, A. N. Dimitrov, Spectrophotometric Investigations on Liquid-Liquid Extraction Systems Containing Cobalt, 4-(2-Pyridylazo)-resorcinol and tetrazolium salts, Chemija, 24(2), 2013, 81-87. [full text]

48.  K. T. Stojnova, K. B. Gavazov, V. D. Lekova, Ion-Association Complexes of Gallium(III) - 4-(2-Pyridylazo)-resorcinol Anionic Chelates and Dicationic Tetrazolium Reagents, Acta Chim. Slov. 60(2), 2013, 390-396. [full text]

49.  G. K.Toncheva, K. B. Gavazov, Flotation-Spectrophotometric Investigations on an Ion-Association System Containing Zirconium(IV), 2013, Chemistry Journal, 3(5), 2013, 122-127. [full text]

50.  K. B. Gavazov, G. K.Toncheva, Extraction-Spectrophotometric Studies on the Ion-Pairing Between Some 2,3,5-Substituted Monotetrazolium Cations and Anions Deriving from 4-(2-Thiazolylazo)resorcinol or 4-(2-Pyridylazo)resorcinol, Journal of Advances in Chemistry, 5(2), 2013, 641-651. [full text]

51.  T. S. Stefanova, K. B. Gavazov, G. K.Toncheva, Extraction-Spectrophotometric Characterization of a Ternary Complex of Iron(III) with 4-(2-pyridylazo)resorcinol (PAR) and 2,3,5-Triphelyl-2H-tetrazolium Chloride (TTC), Scientific research of the Union of Scientists in Bulgaria-Plovdiv, series C. Natural Sciences and Humanities, Vol. XVI, 2013, 183-189 [full text]

52.  V. V. Divarova, P. V. Racheva, V. D. Lekova, K. B. Gavazov, A. N. Dimitrov, Spectrophotometric Determination of Cobalt(II) in a Liquid-Liquid Extraction System Containing 4-(2-Thiazolylazo)resorcinol and 2,3,5-Triphenyl-2H-Tetrazolium Chloride, Journal of Chemical Technology and Metallurgy, 48(6), 2013, 623-630 [full text]

53.  K. B. Gavazov, T. S. Stefanova, G. K.Toncheva, Liquid-liquid extraction and spectrophotometric characterization of a new ternary ion-association complex of iron(III), Journal of Chemical Technology and Metallurgy, 48(6), 2013, 642-648 [full text]

54.  A. Z. Zalov, K.B. Gavazov, Extractive spectrophotometric determination of nickel with 2-hydroxy-5-iodothiophenol and diphenylguanidine. Chemistry Journal, 4(2), 2014, 20-25. [full text]

55.  K. B. Gavazov, T. S. Stefanova,.G. K. Toncheva, Extraction-spectrophotometric studies on the complex formation of iron(III) with 4-(2-thiazolylazo)resorcinol and tetrazolium salts, Journal of Advances in Chemistry, 10(3), 2014, 2491-2501. [full text]

56.  K. B. Gavazov., T. S. Stefanova, Liquid-liquid extraction-spectrophotometric investigations of three ternary complexes of vanadium. Croatica Chemica Acta, 87(3), 2014, 233-240 [full text]

57.  A. Z. Zalov, K. B. Gavazov, Liquid-liquid extraction-spectrophotometric determination of molybdenum using o-hydroxythiophenols. Journal of Advances in Chemistry, 10(8), 2014, 3003-3011 [full text]

58.  V. B. Delchev, K. B. Gavazov, I. G. Shterev, Ground- and excited-state stability of the conformers of 3,5-dinitrocatechol and its complexes with W(VI) and V(V): combined theoretical and experimental study. Journal of Molecular Modeling, 20, 2014, 2549 [abstract]

59.  A. Z. Zalov, K.B. Gavazov, Extraction-spectrophotometric study of ternary complexes of NbV and TaV. Chemistry Journal, 1(2), 2015, 15-19 [full text]

60.  G. K.Toncheva, T. S. Stefanova, K. B. Gavazov, Liquid-liquid extraction-chromogenic systems containing iron(III), 4-nitrocatechol and tetrazolium salts, Oriental Journal of Chemistry, 31(1), 2015, 327-332 [full text].

61.  T. S. Stefanova, K.K. Simitchiev, K. B. Gavazov, Liquid-liquid extraction and cloud point extraction for spectrophotometric determination of vanadium using 4-(2-pyridylazo)resorcinol, Chemical Papers, 69(4) 2015, 495-503 [abstract]

62.  K. B. Gavazov, G. K. Toncheva, Ion-association between some ditetrazolium cations and anions originated from 4-(2-thiazolylazo)resorcinol or 4-(2-pyridylazo)resorcinol, Russian Journal of General Chemistry, 85(1), 2015, 192-197 [abstract]

63.  K. B. Gavazov, G. K.Toncheva, T. S. Stefanova, Extraction-Chromogenic Systems Containing Iron(III), 4-(2-Thiazolylazo) Resorcinol and Ditetrazolium Salts, Oriental Journal of Chemistry, 31(2), 2015, 981-986 [full text]

64.  K. B. Gavazov, V. B. Delchev, G. K. Toncheva, Z. G. Georgieva, Extraction-Spectrophotometric and Theoretical (Hartree-Fock) Investigations on a Ternary Complex of Iron(II) with 4-Nitrocatechol and 2,3,5-Triphenyl-2H-tetrazolium, Russian Journal of General Chemistry, 85(8), 2015, 1945-1951 [abstract]

65.  K. B. Gavazov, V. B. Delchev, T. S. Stefanova, G. K. Toncheva, K. K. Simitchiev, Specific Features of Tetranitrotetrazolium Blue Chloride as an Extraction Reagent for Iron(III), Russian Journal of General Chemistry, 86(5), 2016, 1167-1176 [abstract]

66.  K. B. Gavazov, V. B. Delchev, K. T. Mileva, T. S. Stefanova, G. K. Toncheva, A 2:2:2 Complex of vanadium(V) with 4-(2-thiazolylazo)orcinol and 2,3,5-triphenyl-2H-tetrazolium chloride, Acta Chimica Slovenica, 63(2), 2016, 392-398 [abstract]

67.  K. B. Gavazov, G. K. Toncheva, V. B. Delchev, An extraction-chromogenic system for vanadium(IV,V) based on 2,3-dihydroxynaphtahlene, Open Chemistry, 14, 2016, 197-205 [full text]

68.  G. K. Toncheva, K. B. Gavazov, Z. G. Georgieva, L. K. Dospatliev, A. B. Peltekov, B. S. Boyanov, Application of 4-(2-pyridylazo)resorcinol for flotationspectrophotometric determination of iron, Bull. Chem. Soc. Ethiop. 30, 2016, 325-332 [full text]

69.  S. Zaruba, V. Bozóová, A. B. Vishnikin, Y. R. Bazeľ, J. Šandrejová, K. Gavazov, V. Andruch, Vortex-assisted liquid-liquid microextraction procedure for iodine speciation in water samples, Microchemical Journal 132, 2017, 59-68 [abstract]

70.  S. Zaruba, A. B. Vishnikin, J. Škrlíková, A. Diuzheva, I. Ozimaničová, K. Gavazov, V. Andruch, A two-in-one device for online monitoring of direct immersion single-drop microextraction: an optical probe as both microdrop holder and measuring cell, RSC Advances 7, 2017, 29421-29427 [full text]

71.  T. Stefanova-Bahchevanska, N. Milcheva, S. Zaruba, V. Andruch, V. Delchev, K. Simitchiev, K. Gavazov, A green cloud-point extraction-chromogenic system for vanadium determination, Journal of Molecular Liquids 248, 2017, 135-142 [abstract].