Akademik Veri Yönetim Sistemi
JOURNAL OF MOLECULAR STRUCTURE, cilt.1240, 2021 (SCI-Expanded)
A new Schiff base receptor L-2 was prepared and characterized by elemental analyses, IR, H-1/C-13 NMR, UV-vis, HRMS and PL data. It exhibited one emission band (lambda(em) = 711 nm) with red-point luminescence in the solid state, and one emission band (lambda(em) = 603-613 nm) with yellow luminescence in DMSO solution, which point out the existence of excited state intramolecular proton transfer (ESIPT) reaction between tautomeric forms in the excited state. The recognizing ability of receptor against metal ions (Cr3+, Al3+, Fe3+, Pb2+, Co2+, Cu2+, Mn2+, Cd2+, Zn2+ and Ni2+), alpha-D-amino acids (glycine, alanine, phenylalanine, valine, serine and threonine) and inorganic anions (F-, Cl-, Br-, CH3COO-, H2PO4-, SO32-, S2O32-, NO3-, HSO4-, CN- and OH-) was determined in DMSO-H2O solution by colorimetric and UV-vis experiments. L-2 selectively detected Cu2+ and Fe3+ ions through visual color change as well as UV-vis spectra. Addition of acidic and basic amino acid solution to L-2 caused the change of light orange color of receptor to bright light orange and pale lemon color, respectively. L-2 had a better selectivity for detecting of cationic form of glycine, while it showed good recognition towards anionic form of all the tested D-amino acids. Besides, L(2 )exhibited a highly selective naked-eye sensing of hydrogen sulfate, cyanide and hydroxide ion comparing to the other ions. (C) 2021 Elsevier B.V. All rights reserved.