| dc.creator | Dias Filho, Newton L | |
| dc.creator | Rodrigues, Edson | |
| dc.creator | Gushikem, Yoshitaka | |
| dc.date | 1997-01-01 | |
| dc.date | 2014-07-17T17:17:57Z | |
| dc.date | 2015-11-26T13:54:54Z | |
| dc.date | 2014-07-17T17:17:57Z | |
| dc.date | 2015-11-26T13:54:54Z | |
| dc.date.accessioned | 2018-03-28T21:06:45Z | |
| dc.date.available | 2018-03-28T21:06:45Z | |
| dc.identifier | Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 8, n. 4, p. 415-419, 1997. | |
| dc.identifier | 0103-5053 | |
| dc.identifier | S0103-50531997000400015 | |
| dc.identifier | 10.1590/S0103-50531997000400015 | |
| dc.identifier | http://dx.doi.org/10.1590/S0103-50531997000400015 | |
| dc.identifier | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000400015 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/25078 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/25078 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1240420 | |
| dc.description | Covalently attached benzimidazole molecules on silica gel surface, ºSiL (where L = N-propylbenzimidazole), adsorbs Co(ClO4)2 from non-aqueous solvent by forming a surface complex according to the reaction: m ºSiL + Co(ClO4)2 ® (ºSiL)mCo(ClO4)2. The equilibrium constant and the adsorption capacity, determined by applying the Langmuir equation were b = 3.0 x 10³ L mol-1 and Ns= 0.098 x 10-3 mol g-1, respectively. The metal is bonded through the nitrogen atom and the perchlorate ion is not coordinated. The ESR study indicated that the complex has essentially an octahedral geometry with tetragonal distortion, with the electrons of the four nitrogen atoms interacting with the cobalt central metal ion in the equatorial plane. Only one complex species was detected on the surface. | |
| dc.description | Moléculas de benzimidazol covalentemente ligadas à superfície da silica gel, ºSiL (onde L = N-propilbenzimidazol), adsorvem Co(ClO4)2 de solvente não aquoso formando complexos na superfície segundo a reação: m ºSiL + Co(ClO4)2 ® (ºSiL)mCo(ClO4)2. As constantes de equilíbrio e capacidade de adsorção, foram determinadas aplicando-se a equação de Langmuir fornecendo respectivamente, b = 3.0 x 10³ L mol-1 e Ns = 0.098 x 10-3 mol g-1. O metal está ligado através do átomo de nitrogênio e o íon perclorato não está coordenado. O estudo de ESR mostrou que o complexo possui essencialmente uma geometria com distorção tetragonal, com os elétrons dos quatro nitrogênios interagindo com o ion metálico central cobalto no plano equatorial. Somente uma espécie complexa foi detectada na superfície. | |
| dc.description | 415 | |
| dc.description | 419 | |
| dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
| dc.language | en | |
| dc.publisher | Sociedade Brasileira de Química | |
| dc.relation | Journal of the Brazilian Chemical Society | |
| dc.rights | aberto | |
| dc.source | SciELO | |
| dc.subject | silica gel | |
| dc.subject | benzimidazole | |
| dc.subject | cobalt-benzimidazole surface complex | |
| dc.subject | cobalt electron spin resonance | |
| dc.subject | silica gel modified with benzimidazole | |
| dc.title | Structure of cobalt (II) perchlorate adsorbed on silica gel surface chemically modified with benzimidazole molecule | |
| dc.type | Artículos de revistas | |
