title: Colorimetric and fluorescent chemosensors for the detection of 2,4,6-trinitrophenol and investigation of their co-crystal structures.
abstract: A full account of our studies of 2,4,6-trinitrophenol (TNP) sensing is provided. A series of chemosensors with a variety of aromatic chromophores for specific recognition of TNP has been designed and then realized through the fluorescence "on/off" mechanism. These chemosensors demonstrated highly selective, sensitive, and fluorescent quenching of TNP with remarkable visual changes through the intramolecular charge-transfer (ICT) process. Their host-guest interactions were investigated by (1)H NMR spectroscopic titrations and their corresponding co-crystal structures, which showed that the 1:1 host-guest complexes were formed by multiple hydrogen-bond interactions in solution or in the solid state. The origins of the significant affinity demonstrated during the fluorescence recognition process were further disclosed through DFT calculations of corresponding compounds.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
authors.forename: Ming
authors.initials: M
authors.lastname: Dong
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: Wang
authors.forename: Ai-Jiang
authors.initials: AJ
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Peng