TY - JOUR
AU - Zhu, Chengzhu
AB - The superoxide anion radical (O2•−) is one of the most predominant reactive oxygen species (ROS), which is also involved in diverse chemical and biological processes. In this study, O2•− was generated by irradiating riboflavin in an O2-saturated solution using an ultraviolet lamp (λem = 365 nm) as the light source. The photochemical reduction of 1,4-benzoquinone (p-BQ) by O2•− was explored by 355-nm laser flash photolysis (LFP) and 365-nm UV light steady irradiation. The results showed that the photodecomposition efficiency of p-BQ was influenced by the riboflavin concentration, p-BQ initial concentration, and pH values. The superoxide anion radical originating from riboflavin photolysis served as a reductant to react with p-BQ, forming reduced BQ radicals (BQ•−) with a second-order rate constant of 1.1 × 109 L mol−1 s−1. The main product of the photochemical reaction between p-BQ and O2•− was hydroquinone (H2Q). The present work suggests that the reaction with O2•− is a potential transformation pathway of 1, 4-benzoquinone in atmospheric aqueous environments.
TI - Photochemical reactions between 1,4-benzoquinone and O2•−
JF - Environmental Science and Pollution Research
DO - 10.1007/s11356-020-09422-8
DA - 2020-09-01
UR - https://www.deepdyve.com/lp/springer-journals/photochemical-reactions-between-1-4-benzoquinone-and-o2-Hk1cA02szp
SP - 31289
EP - 31299
VL - 27
IS - 25
DP - DeepDyve
ER -