In an effort to address the need for a rapid, selective and economical detection technique for aqueous pertechnetate (TcO4?) anion based on recognition at the molecular level, 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. Complimentary Raman spectroscopy and microscopy techniques, structural determination and theoretical methods were employed to achieve molecular-level understanding of the mechanism of the response to aqueous TcO4?.
Revised: December 9, 2015 |
Published: October 8, 2015
Citation
Chatterjee S., A.E. Norton, M.K. Edwards, J.M. Peterson, S.D. Taylor, S.A. Bryan, and A. Andersen, et al. 2015.Highly Selective Colorimetric and Luminescence Response of a Square-Planar Platinum(II) Terpyridyl Complex to Aqueous TcO4?.Inorganic Chemistry 54, no. 20:9914-9923.PNNL-SA-110957.doi:10.1021/acs.inorgchem.5b01664