Articles Information
Chemistry Journal, Vol.1, No.2, Apr. 2015, Pub. Date: Mar. 31, 2015
Extraction-Spectrophotometric Study of Ternary Complexes of NbV and TaV
Pages: 15-19 Views: 4307 Downloads: 1037
Authors
[01]
Ali Z. Zalov, Department of Analytical Chemistry, Azerbaijan State Pedagogical University, Baku, Azerbaijan.
[02]
Kiril B. Gavazov, Department of General and Inorganic Chemistry, University of Plovdiv “Paissii Hilendarski”, Plovdiv, Bulgaria.
Abstract
29 liquid-liquid extraction-chromogenic systems containing MV (M=Nb or Ta), thiocatecholic compounds (TCs) and hydrophobic amines (HAs) were studied. The following TCs were used: 2,4-dihydroxythiophenol (DHTP), 2-hydroxythiophenol (HTP), 2-hydroxy-5-chlorothiophenol (HCTP), 2-hydroxy-5-bromothiophenol (HBTP), and 2-hydroxy-5-iodothiophenol (HBIP). The HAs were aniline (An), N-methylaniline (MAn), N,N-dimethylaniline (DAn), aminopyridine (APy), dipyridyl (DiPy), guanidine (Gu), diphenylguanidine (DPG), and triphenylguanidine (TPG). The best organic solvent was chloroform. Under the optimum conditions, the molar absorptivities (εmax) and the degrees of MV extraction (R%) in this solvent were in the ranges (1.6-3.9)×104 L mol-1cm-1 and (98.1-99.3)%, respectively. The molar ratio of the reacting species was 1:2:2 (MV:TC:HA). Relationships were studied between the acid-base properties of the sulfhydryl group of TCs (pKSH) and some characteristics of the ternary complexes (εmax and ΔpH50).
Keywords
Liquid-Liquid Extraction, Niobium, Tantalum, Complex Formation, Ion-Associate, Constants of Dissociation, Relationship, Spectrophotometric Investigation
References
[01]
(a) Pienaar, A.; Wagener, J.; Crouse, P. L. Int. J. Miner. Process. 2012, 114, 7. (b) Greenwood, N. N. Catal. Today 2003, 78 , 5. (c) Nagiev, K. D. J. Anal. Chem. 2004, 59, 930.
[02]
(a) Li, G.; Wei, Q.; Hu, Q.; Huang, Z.; Yang, G. Microchim. Acta 2007, 158, 95. (b) Dongling, L.; Xiaoyan, H.; Haizhou, W. Talanta 2004, 63, 233. (c) Vachirapatama, N.; Doble, P.; Haddad, P. R. Anal. Chim. Acta 2000, 409, 35. (d) Vachirapatama, N.; Macka, M.; Paull, B.; Münker, C.; Haddad, P. R. J. Chromatogr. A 1999, 850, 257. (e) Yang, X.; Pin, C. Anal. Chimica Acta 2002, 458, 375. (f) He, R.; Chen, J.; Huang, Z.; Yin, J.; Yang, G. Asian J. Chem. 2007, 19, 3851.
[03]
(a) Gibalo, I. M. Analiticheskaya khimiya elementov. Analiticheskaya khimiya niobiya i tantala (Analytical chemistry of elements. Analytical chemistry of niobium and tantalum). Nauka: Moscow, 1967 [In Russian]. (b) Chhakkar, A.; Kakkar, L. Fresenius' J. Anal. Chem. 1995, 351, 720. (c) Chhakkar, A.; Kakkar, L. Microchim. Acta 1995, 117, 137. (d) Amin, A. S. Microchem. J. 2000, 65, 261. (e) Patel, K.; Menon, S. K.; Agrawal, Y. K. Microchem. J. 1996, 53, 158. (f) Tamhina, B.; Gojmerac Ivšić, A.; Bartolinčić, A. Croat. Chem. Acta 2000, 73, 57. (g) Gojmerac Ivšić, A.; Galić, N.; Tomišić, V. J. Solution Chem. 2009, 38, 149. (h) Smolik, M.; Turkowska, M. Talanta 2013, 115, 184. (i) Sekomo, C. Rwanda Journal Series D. 2013, 25, 22. (j) Suvorova, D.S.; Khudonogova, E. V.; Revenko, A. G. Analitika i control 2014, 18, 23 [in Russian]. (k) Lekova, V.; Racheva, P.; Stojnova, K.; Dimitrov, A.; Gavazov, K. Chemija 2010, 21, 106. (l) Racheva, P.; Lekova, V.; Stefanova, T.; Dimitrov, A.; Gavazov, K. Nauch. Tr. Plovdiv Univ. Khim. 2010, 37, 33; (m) Zalov, A. Z.; Verdizade, N. A.; Dzhamalova, R. I. Azerb. J. Chem. 2011, (1), 97. (n) Marczenko, Z.; Balcerzak, M. Metod’y spektrofotometrii v UF i vidimoj oblastyakh v neorganicheskom analize (UV-Vis spectrophotometry in inorganic analysis) Binom. Laboratoriya znanij: Moscow, 2007 [in Russian].
[04]
(a) Zalov, A.; Verdizade, N. A.; Abaskulieva, U. B. Izv. Vuz. Khim. Kh. Tekh. 2012, 55(10), 23. (b) Zalov, A. Z.; Verdizade, N. A. J. Anal. Chem. 2013, 68, 212; (c) Kuliev, K.; Verdizade, N.; Abaskulieva, U. Izv. Vuz. Khim. Kh. Tekh. 2012, 55(9), 22; (d) Zalov, A. Z.; Gavazov, K. B. Chem. J. 2014, 4, 20. (e) Zalov, A. Z.; Gavazov, K. B. J. Adv. Chem. 2014, 10, 3003.
[05]
Korostelev, P. P., Prigotovlenie rastvorov dlya khimiko-analiticheskikh rabot (Preparation of solutions for chemical analytical labours). Khimiya: Moscow, 1964 [in Russian].
[06]
Kuliev, A. M.; Aliev, S. R.; Mamedov, F. N.; Movsumzade, M. Zh. Org. Khim. 1976, 12, 426.
[07]
Zhiming, Z.; Dongsten, M.; Cunxiao, Y., J. Rare Earths 1997, 15, 216.
[08]
Asmus, E. Fresenius' J. Anal. Chem. 1960, 178, 104.
[09]
Barbanel, Y. A., Zh. Neorg. Khim. 1964, 9, 437.
[10]
Nazarenko, V. A. Trud’y komissii po analiticheskoj khimii AN SSSR (Proceedings of the Commission on Analytical Chemistry). Nauka: Moscow, 1969; Vol. 17 [in Russian].
[11]
Al'bert, A.; Sergent, E. Konstant’y ionizatsii kislot i osnovanij (Ionization Constants of Acids and Bases). Khimia: Moscow-Leningrad, 1964 [in Russian].