Subject(s)
Antiviral Agents/therapeutic use , Health Care Costs/statistics & numerical data , Hepatitis C, Chronic/diagnosis , Hepatitis C, Chronic/drug therapy , Imidazoles/therapeutic use , Mass Screening , Adolescent , Adult , Antiviral Agents/economics , Carbamates , Egypt/epidemiology , Female , Hepatitis C, Chronic/epidemiology , Hepatitis C, Chronic/prevention & control , Humans , Imidazoles/economics , Male , Mass Screening/economics , Mass Screening/methods , Middle Aged , Pyrrolidines , Seroepidemiologic Studies , Sofosbuvir/economics , Sofosbuvir/therapeutic use , Valine/analogs & derivatives , Young AdultABSTRACT
This article reports the optical properties such as absorption profile, molar absorptivity, fluorescence profile and photo-physical parameters such as dipole moment, oscillator strength, fluorescence quantum yields, fluorescence lifetimes, laser performance and finally photostability of 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene (BBOT),1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOB), 5-diphenyel-oxazole (PPO) laser dyes in different restricted hosts. (BBOT), (POPOB) and (PPO) are embedded in transparent silica-based nanoporous sol-gel glass and copolymer matrix of methyl methacrylate (MMA) and 2-hydroxyethyl methacrylate (HEMA). The absorption and fluorescence properties of these laser dyes in sol-gel glass matrices are compared with their respective properties in copolymer host. In case of sol-gel matrix, all dyes had higher quantum yields as well as lasing wavelength maxima. The laser performances as well as the photostability of these laser dyes in sol-gel glass displayed senior behavior compared with (MMA/ HEMA) copolymer samples upon using nitrogen laser (337.1 nm) as pumping energy.