title: Mechanistic study of fulvic acid assisted propranolol photodegradation in aqueous solution.
abstract: Laser flash (355 nm) and stationary (365 nm) photolysis were used to study the mechanisms of propranolol photolysis in the presence of fulvic acid in aqueous solutions. The FA-assisted photodegradation of propranolol was observed using UV-A irradiation (where propranolol is stable). Direct evidence indicated that the photodegradation resulted from the static quenching of the FA triplet state by propranolol via the electron transfer mechanism. The triplet state yield (ϕT≈0.6%) and the T-T absorption coefficient (ɛT(620 nm)≈5×10(4) M(-1) cm(-1)) were estimated for the first time by modeling the yields of the FA triplet state in the presence of propranolol. Thus, fulvic acid is a promising agent for accelerating propranolol photodegradation in aqueous solutions under UV-A light irradiation.
authors.affiliation: V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russian Federation.
authors.forename: Maria P
authors.initials: MP
authors.lastname: Makunina
authors.affiliation: V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russian Federation; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russian Federation. Electronic address: pozdnyak@kinetics.nsc.ru.
authors.forename: Ivan P
authors.initials: IP
authors.lastname: Pozdnyakov
authors.affiliation: School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.affiliation: V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russian Federation.
authors.forename: Vyacheslav P
authors.initials: VP
authors.lastname: Grivin
authors.affiliation: V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russian Federation; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russian Federation.
authors.forename: Nikolay M
authors.initials: NM
authors.lastname: Bazhin
authors.affiliation: V.V. Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russian Federation; Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russian Federation.
authors.forename: Victor F
authors.initials: VF
authors.lastname: Plyusnin
mesh_terms: D065966:Absorption, Physicochemical; D001578:Benzopyrans / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis; D007834:Lasers; D008956:Models, Chemical; D015394:Molecular Structure; D010782:Photolysis; D011433:Propranolol / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D001578:Benzopyrans; D006812:Humic Substances; D014874:Water Pollutants, Chemical; D011433:Propranolol; C005023:fulvic acid
keywords: Aqueous solution; Fulvic acid; Laser flash photolysis; Photodegradation; Propranolol; Triplet state