title: Determination of gaseous sulfur dioxide and its derivatives via fluorescence enhancement based on cyanine dye functionalized carbon nanodots.
abstract: The development of convenient methods for sulfur dioxide and its derivatives analysis is critically important because SO2 causes worldwide serious environmental problems and human diseases. In this work, we show an unprecedented example of an energy-transfer-based fluorescence nanoprobe for selective and quantitative detection of SO2, through molecular engineering of the fluorescent carbon nanodots by a cyanine dye which have a unique reactivity to bisulfite, achieving a detection limit of 1.8 μM with a linear relationship (R(2) = 0.9987). The specific detection was not interfered with other potential coexisted species. In addition, the probe is demonstrated for the determination of SO2 gas in aqueous solution as well as for visually monitoring of SO2 gas in air. This nanomaterial based probe is easily prepared, fast responding, and thus potentially attractive for extensive application for the determination of SO2 and other similar air pollutants.
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences , Hefei, Anhui 230031, People's Republic of China.
authors.forename: Mingtai
authors.initials: M
authors.lastname: Sun
authors.forename: Huan
authors.initials: H
authors.lastname: Yu
authors.forename: Kui
authors.initials: K
authors.lastname: Zhang
authors.forename: Yajiao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yehan
authors.initials: Y
authors.lastname: Yan
authors.forename: Dejian
authors.initials: D
authors.lastname: Huang
authors.forename: Suhua
authors.initials: S
authors.lastname: Wang