Adsorption of copper(II) and cobalt(II) complexes on a silica gel surface chemically modified with 3-amino-1,2,4-triazole

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:35Z
dc.date.available2014-05-20T13:29:35Z
dc.date.created2014-05-20T13:29:35Z
dc.date.issued1998-12-20
dc.identifierColloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 144, n. 1-3, p. 219-227, 1998.
dc.identifier0927-7757
dc.identifierhttp://hdl.handle.net/11449/10012
dc.identifier10.1016/S0927-7757(98)00569-X
dc.identifierWOS:000077740400021
dc.description.abstractThe isotherms of adsorption of MX2 (M = Cu2+, Co2+; X = Cl-, Br-, ClO4) by silica gel chemically modified with 3-amino-1,2,4-triazole (SiATR) were studied in acetone and ethanol solutions, at 25 degrees C. The 3-amino-1,2,4-triazole molecule, covalently bound to the silica gel surface, adsorbs MX2 from solvent by forming a surface complex. At low loading, the electronic and electron spin resonance spectral parameters indicated that the Cu2+ complexes have distorted tetragonal symmetry. The CoX2 (X = Cl-, Br-) analogues exhibit a distorted-tetrahedral geometry, whilstthe (SiATR)mCo)ClO4)(2) complex has a tetragonally distorted octahedral geometry, with four equatorial nitrogen atoms around the cobalt. (C) 1998 Elsevier B.V. B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.relation2.829
dc.relation0,753
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subject3-amino-1,2,4-triazole
dc.subjectcopper and cobalt complexes with 3-amino-1,2,4-triazole
dc.subjectelectron spin resonance
dc.subjectmodified silica gel
dc.titleAdsorption of copper(II) and cobalt(II) complexes on a silica gel surface chemically modified with 3-amino-1,2,4-triazole
dc.typeArtículos de revistas


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