title: Novel hexapodal triazole linked to a cyclophosphazene core rhodamine-based chemosensor for selective determination of Hg(2+) ions.
abstract: The hexapodal Rhodamine B derivative compound 3 containing a cyclotriphosphazene core was synthesized and characterized by spectroscopic techniques such as FT-IR, (1)H, (13)C and (31)P NMR, HR-MS, MALDI MS and microanalysis. Compound 3 is a naked eye selective sensor with colorimetric and fluorescent properties for Hg(2+) ions in the presence of other metal ions such as Na(+), K(+), Ca(2+), Ba(2+), Mg(2+), Ag(+), Mn(2+), Cu(2+), Ni(2+), Co(2+), Pb(2+), Cd(2+), Zn(2+), Fe(2+), Fe(3+), and Cr(3+). The optical sensor properties of compound 3 were investigated using UV-vis and fluorescence spectroscopy. The lowest detection limit of compound 3 was determined as 3.76 × 10(-9) M (0.75 ppb) for Hg(2+) ions. The stoichiometry of compound 3-Hg(2+) complex was found to be 1:3 (ligand/metal ion). The reusable test strip was improved by the immobilization of compound 3 into a hydrogel network. The reusability of the sensor and test strip was tested with S(2-) ion solutions.
authors.affiliation: Department of Chemistry, Inorganic Chemistry Laboratory, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, 17020, Turkey, havaozay@comu.edu.tr.
authors.forename: Hava
authors.initials: H
authors.lastname: Ozay
authors.forename: Reyhan
authors.initials: R
authors.lastname: Kagit
authors.forename: Mehmet
authors.initials: M
authors.lastname: Yildirim
authors.forename: Serkan
authors.initials: S
authors.lastname: Yesilot
authors.forename: Ozgur
authors.initials: O
authors.lastname: Ozay
mesh_terms: D015374:Biosensing Techniques; D005456:Fluorescent Dyes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000032:analysis*; D008958:Models, Molecular; D015394:Molecular Structure; D009943:Organophosphorus Compounds / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D017550:Spectroscopy, Fourier Transform Infrared; D014230:Triazoles / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D009943:Organophosphorus Compounds; D012235:Rhodamines; D014230:Triazoles; C074235:cyclophosphazene monomer; D008628:Mercury; C029773:rhodamine B