Adsorption of copper(II) and cobalt(II) complexes on a silica gel surface chemically modified with 3-amino-1,2,4-triazole
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
20/12/1998
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Resumo |
The 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. |
Formato |
219-227 |
Identificador |
http://dx.doi.org/10.1016/S0927-7757(98)00569-X Colloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 144, n. 1-3, p. 219-227, 1998. 0927-7757 http://hdl.handle.net/11449/10012 10.1016/S0927-7757(98)00569-X WOS:000077740400021 |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Direitos |
closedAccess |
Palavras-Chave | #3-amino-1,2,4-triazole #copper and cobalt complexes with 3-amino-1,2,4-triazole #electron spin resonance #modified silica gel |
Tipo |
info:eu-repo/semantics/article |