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https://hdl.handle.net/1822/39750
Título: | Ionic, paramagnetic and photophysical properties of a new biohybrid material incorporating copper perchlorate |
Autor(es): | Leones, Rita Daniela Barros Donoso, J. P. Magon, C. J. Silva, I. D. A. de Camargo, A. S. S. Pawlicka, A. Silva, Maria Manuela |
Palavras-chave: | Ormolytes Electron paramagnetic resonance Impedance spectroscopy Photoluminescence spectroscopy Conductivity |
Data: | 2015 |
Editora: | Elsevier |
Revista: | Electrochimica Acta |
Citação: | Leones, R., Donoso, J. P., Magon, C. J., Silva, I. D. A., De Camargo, A. S. S., Pawlicka, A., & Silva, M. M. (2015). Ionic, paramagnetic and photophysical properties of a new biohybrid material incorporating copper perchlorate. Electrochimica Acta, 173, 76-81. doi: 10.1016/j.electacta.2015.04.158 |
Resumo(s): | The sol-gel method was employed in the synthesis of di-urethane cross-linked poly(-caprolactone) (d-PCL(530)/siloxane biohybrid ormolytes incorporating copper perchlorate, (Cu(ClO4)2). The highest ionic conductivity of the d PCL(530)/siloxanenCu(ClO4)2 system is that with n = 10 (1.4 x 10-7 and 1.4 x 10-5 S cm-1, at 25 and 100 ºC, respectively). In an attempt to understand the ionic conductivity/ionic association relationship, we decide to inspect the chemical environment experienced by the Cu2+ ions in the d-PCL(530)/siloxane medium. The observed EPR spectra are typical of isolated monomeric Cu2+ ions in axially distorted sites. The molecular orbital coefficients obtained from the EPR spin Hamiltonian parameters and the optical absorption band suggests that bonding between the Cu2+ and its ligand in the ormolytes are moderately ionic. Investigation by photoluminescence spectroscopy did not evidence or allow selective excitation of transitions corresponding to complexed Cu2+ species. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/39750 |
DOI: | 10.1016/j.electacta.2015.04.158 |
ISSN: | 0013-4686 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Leones_et_al-2015-Electrochimica Acta 2.pdf Acesso restrito! | 962,28 kB | Adobe PDF | Ver/Abrir |