title: Highly Selective Colorimetric and Luminescence Response of a Square-Planar Platinum(II) Terpyridyl Complex to Aqueous TcO4(-).
abstract: Molecular recognition of an aqueous pertechnetate (TcO4(-)) anion is fundamentally challenging partly due to the charge-diffuse nature of this anion, which hampers design of new technologies for its separation and detection. To address this gap, simple salts of transition metal complexes that undergo a distinct spectroscopic change upon exposure to aqueous anions were explored. The Pt(II) complex [Pt(tpy)Br]SbF6 (tpy = 2,2';6',2″-terpyridine) undergoes a dramatic color change and intense luminescence response upon TcO4(-) uptake due to concomitant enhancement of Pt···Pt interactions. The spectroscopic response was highly selective and quantitative for aqueous TcO4(-) among other competing anions. Complementary Raman spectroscopy and microscopy techniques, structural determination, and theoretical methods were employed to elucidate the mechanism of this response at the molecular level.
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Sayandev
authors.initials: S
authors.lastname: Chatterjee
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Amie E
authors.initials: AE
authors.lastname: Norton
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Matthew K
authors.initials: MK
authors.lastname: Edwards
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: James M
authors.initials: JM
authors.lastname: Peterson
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Taylor
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Samuel A
authors.initials: SA
authors.lastname: Bryan
authors.affiliation: Environmental & Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Amity
authors.initials: A
authors.lastname: Andersen
authors.affiliation: Environmental & Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Niranjan
authors.initials: N
authors.lastname: Govind
authors.affiliation: Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States.
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Albrecht-Schmitt
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: William B
authors.initials: WB
authors.lastname: Connick
authors.affiliation: Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99354, United States.
authors.forename: Tatiana G
authors.initials: TG
authors.lastname: Levitskaia
mesh_terms: D003124:Colorimetry; D049449:Luminescence; D008958:Models, Molecular; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D011789:Quantum Theory; D013670:Sodium Pertechnetate Tc 99m / Q000032:analysis*; D014867:Water / Q000737:chemistry
chemical_list: D009944:Organoplatinum Compounds; D011725:Pyridines; D014867:Water; D013670:Sodium Pertechnetate Tc 99m