@article{article_735011, title={An Effective ‘Off-On’ Artificial Probe Based on Rhodamine B Derivative for Sensitive and Selective Recognition of Cu2+ Ions}, journal={Erzincan University Journal of Science and Technology}, volume={13}, pages={811–827}, year={2020}, DOI={10.18185/erzifbed.735011}, author={Özdemir, Mecit and Yılmaz, Yusuf}, keywords={Colorimetric, fluorescent, xanthane, detection}, abstract={This paper describes the synthesis and optical application of a novel, xanthane-based colorimetric and fluorescent `on-off’ sensor RhCHN for the selective recognition and discrimination of Cu2+ ions. Its structural characterization was achieved by NMR (1H and 13C), FT-IR sand LC-MS/MS analyses. Of the meatal ions tested, only addition of Cu2+ ions to the probe in buffer solution, the maximum increases in both absorption and fluorescent emission spectra at 565 and 588 nm, respectively, were observed, followed by an immediate change in color from colorless to purple, visible to the naked eye. It was found that the RhCHN probe showed remarkable selectivity and sensitivity to copper ions only among the metal ions initially used. According to Job’s plot method, it was estimated that RhCHN is bound to the Cu2+ ion to form a complex within a 1:1 coordination stoichiometry (RhCHN:Cu2+). As stated in previous reports, a strong bond interaction between Cu2+ and RhCHN has most likely gone through the spirolactam ring opening process. With an acceptable detection limit for copper ions, the analytical applications implied that the chromogenic and fluorogenic double response probe RhCHN can be effectively used for direct visualization and detection of Cu2+ in aqueous medium.}, number={2}, publisher={Erzincan Binali Yildirim University}