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Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems.
Mannu, Alberto; Di Pietro, Maria Enrica; Mele, Andrea.
Afiliación
  • Mannu A; Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
  • Di Pietro ME; Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
  • Mele A; Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.
Molecules ; 25(7)2020 Mar 25.
Article en En | MEDLINE | ID: mdl-32218347
ABSTRACT
UV-VIS spectroscopy analysis of six mixtures containing choline chloride or triphenylmethylphosphonium bromide as the hydrogen bond acceptor (HBA) and different hydrogen bond donors (HBDs, nickel sulphate, imidazole, d-glucose, ethylene glycol, and glycerol) allowed to determine the indirect and direct band-gap energies through the Tauc plot method. Band-gap energies were compared to those relative to known choline chloride-containing deep band-gap systems. The measurements reported here confirmed the tendency of alcohols or Lewis acids to increment band-gap energy when employed as HBDs. Indirect band-gap energy of 3.74 eV was obtained in the case of the triphenylmethylphosphonium bromide/ethylene glycol system, which represents the smallest transition energy ever reported to date for such kind of systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Onio / Compuestos de Tritilo / Colina Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Italia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compuestos Onio / Compuestos de Tritilo / Colina Idioma: En Revista: Molecules Asunto de la revista: BIOLOGIA Año: 2020 Tipo del documento: Article País de afiliación: Italia
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