Chemical and photochemical properties of chloroharmine derivatives in aqueous solutions

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Thermal and photochemical stability (ΦR), room temperature UV-vis absorption and fluorescence spectra, fluorescence quantum yields (ΦF) and lifetimes (τF), quantum yields of hydrogen peroxide (ΦH2O2) and singlet oxygen (ΦΔ) production, and triplet lifetimes (τT) have been obtained for the neutral an...

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Guardado en:
Detalles Bibliográficos
Autor principal: Erra Balsells, Rosa
Publicado: 2015
Materias:
harmine
hydrogen peroxide
oxygen
solution and solubility
water
analogs and derivatives
chemical structure
chemistry
fluorescence
photochemistry
spectrofluorometry
Fluorescence
Harmine
Hydrogen Peroxide
Molecular Structure
Oxygen
Photochemical Processes
Solutions
Spectrometry, Fluorescence
Water
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v18_n2_p886_RasseSuriani
http://hdl.handle.net/20.500.12110/paper_14639076_v18_n2_p886_RasseSuriani
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Thermal and photochemical stability (ΦR), room temperature UV-vis absorption and fluorescence spectra, fluorescence quantum yields (ΦF) and lifetimes (τF), quantum yields of hydrogen peroxide (ΦH2O2) and singlet oxygen (ΦΔ) production, and triplet lifetimes (τT) have been obtained for the neutral and protonated forms of 6-chloroharmine, 8-chloroharmine and 6,8-dichloroharmine, in aqueous media. When it was possible, the effect of pH and oxygen concentration was evaluated. The nature of electronic transitions of protonated and neutral species of the three investigated chloroharmines was established using Time-Dependent Density Functional Theory (TD-DFT) calculations. The impact of all the foregoing observations on the biological role of the studied compounds is discussed. © the Owner Societies 2016.

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