title: Optical sensing of parts per million levels of water in organic solvents using redox-active osmium chromophore-based monolayers.
abstract: Optical sensing of parts per million (ppm)-levels of H2O (10-300 ppm) in an organic solvent with robust, osmium chromophore-based monolayers is demonstrated. The H2O-induced reduction of the covalently bound osmium(III) complex is fully reversible and can be readily monitored by UV/vis absorption spectroscopy. The thermally robust sensor can be reactivated chemically within 3 min.
authors.affiliation: Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel.
authors.forename: Tarkeshwar
authors.initials: T
authors.lastname: Gupta
authors.forename: Milko E
authors.initials: ME
authors.lastname: van der Boom
mesh_terms: D005663:Furans / Q000737:chemistry*; D008567:Membranes, Artificial; D015394:Molecular Structure; D055095:Optics and Photonics; D009942:Organometallic Compounds / Q000737:chemistry*; D009992:Osmium / Q000737:chemistry*; D010084:Oxidation-Reduction; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000032:analysis* / Q000737:chemistry
chemical_list: D005663:Furans; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D012997:Solvents; D014867:Water; D009992:Osmium; C018674:tetrahydrofuran