title: Rhenium-Based Molecular Trap as an Evanescent Wave Infrared Chemical Sensing Medium for the Selective Determination of Amines in Air.
abstract: An evanescent wave infrared chemical sensor was developed to selectively detect volatile amines with heterocyclic or phenyl ring. To achieve this goal, a rhenium-based metallacycle with a "molecular-trap" structure was designed and synthesized as host molecules to selectively trap amines with heterocyclic or phenyl ring through Re-amine and π-π interactions. To explore the trapping properties of the material, a synthesized Re-based molecular trap was treated on an IR sensing element, and wide varieties of volatile organic compounds (VOCs) were examined to establish the selectivity for detection of amines. Based on the observed IR intensities, the Re-based molecular trap favors interaction with amines as evidenced by the variation of absorption bands of the Re molecular trap. With extra π-π interaction force, molecules, such as pyridine and benzylamine, could be detected. After optimization of the parameters for IR sensing, a rapid response in the detection of pyridine was observed, and the linear ranges were generally up to 10 mg/L with a detection limit around 5.7 μg/L. In the presence of other VOCs, the recoveries in detection of pyridine were all close to 100%.
authors.affiliation: Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung, 807, Taiwan.
authors.forename: Genin Gary
authors.initials: GG
authors.lastname: Huang
authors.affiliation: Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan.
authors.forename: Chung-Jay
authors.initials: CJ
authors.lastname: Lee
authors.affiliation: Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan.
authors.forename: Jyisy
authors.identifier: http://orcid.org/0000-0002-9806-8438
authors.initials: J
authors.lastname: Yang
authors.affiliation: Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
authors.forename: Che-Hao
authors.initials: CH
authors.lastname: Chang
authors.affiliation: Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
authors.forename: Malaichamy
authors.initials: M
authors.lastname: Sathiyendiran
authors.affiliation: Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
authors.forename: Zong-Zhan
authors.initials: ZZ
authors.lastname: Lu
authors.affiliation: Institute of Chemistry, Academia Sinica , Taipei 115, Taiwan.
authors.forename: Kuang-Lieh
authors.initials: KL
authors.lastname: Lu
keywords: chemical sensor; evanescent wave; infrared; rhenium; supramolecule