Sulphonated metal phthalocyanine complexes as redox indicators in micro titrations with cerium(IV) sulphate

Gowda, H. S. and Achar, B. N. (1980) Sulphonated metal phthalocyanine complexes as redox indicators in micro titrations with cerium(IV) sulphate. Mikrochimica Acta, 74 (3-4). pp. 301-307. ISSN 0026-3672

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Abstract

Tetrasodium salts of copper(II) 4,4′,4″,4‴-tetrasulphophthalo-cyanine 2-hydrate, nickel (II)4,4′,4″,4‴-tetrasulphophthalocyanine, nickel(II) 3,3′,3″,3‴-tetrasurphophthaloycanine and cobalt(II) 4,4′,4″, 4‴-tetrasulphophthalocyanine 2-hydrate, and copper phthalocyanine trisulphonic acid are prepared in pure state. The molar absorptivity and formal redox potentials of the complexes are determined. The complexes are proposed as sensitive redox indicators in the micro determination of iron(II), arsenic(III), molybdenum(V), uranium(IV) and hydroquinone with 0.001-0.0005 N cerium(IV) sulphate in sulphuric, hydrochloric and acetic acid media. They give sharp colour change from light turquoise blue to pale purple colour at the equivalence point. They have advantages over a few existing redox indicators.

Item Type: Article
Additional Information: Publisher: Springer-Verlag
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: Dhruva Kumar
Date Deposited: 11 Jun 2021 11:07
Last Modified: 11 Jun 2021 11:07
URI: http://eprints.uni-mysore.ac.in/id/eprint/13863

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