title: Two Sensitive Fluorescent BOPIM Probes with Tunable TICT Character for Low-Level Water Detection in Organic Solvents.
abstract: Two novel Boron-fluorine derivatives bearing dimethylamino moieties, BOPIM-1 and BOPIM-2, were proposed as sensitive fluorescent sensors for low-level water quantification in organic solvents. Two BOPIMs exhibit typical phenomenon for an emission from a twisted intra-molecular charge transfer (TICT) state, the emission red shift and intensity weakening with solvent polarity. Introduction of trace amount of water to solvent resulted in fluorescent quenching, accompanied by the red shift of the emission, which was attributed to the formation of TICT excitation of BOPIMs by hydrolysis. A quantification method to detect water content was developed, described by a linear equation lg(I/I(0)) vs. lg φ(w) in the range of φ(w) (volume fraction of water) 0.001~0.01, 0.01~0.1, respectively. The experiment results of determination of water in real 1, 4-dioxane (Diox) samples proved that this method can be used in practical application.
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Shen
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China.
authors.forename: Chunlin
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Yang
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China.
authors.forename: Sen
authors.initials: S
authors.lastname: Liu
authors.affiliation: College of Biology and Pharmaceutical Science, Three Gorges University, Yichang, 443002, People's Republic of China. changying.yang@ctgu.edu.cn.
authors.forename: Changying
authors.initials: C
authors.lastname: Yang
mesh_terms: D004146:Dioxanes / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D008744:Methylamines / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D014867:Water / Q000032:analysis*
chemical_list: C000611458:BOPIM-1 compound; C000611460:BOPIM-2 compound; D004146:Dioxanes; D005456:Fluorescent Dyes; D008744:Methylamines; D012997:Solvents; D014867:Water; C025223:1,4-dioxane
keywords: BOPIMs; Fluorescent sensor; Solvent; Twisted intra-molecular charge transfer (TICT); Water determination