Terpyridine-Functionalized Calixarenes: Synthesis,Characterization and Anion Sensing Applications |
| |
| Authors: | Nicola Y Edwards David M Schnable Ioana R Gearba-Dolocan Jenna L Strubhar |
| |
| Institution: | 1.Department of Chemistry and Biochemistry, Misericordia University, Dallas, PA 18612, USA; (D.M.S.); (J.L.S.);2.Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA; |
| |
| Abstract: | Lanthanide complexes have been developed and are reported herein. These complexes were derived from a terpyridine-functionalized calix4]arene ligand, chelated with Tb3+ and Eu3+. Synthesis of these complexes was achieved in two steps from a calix4]arene derivative: (1) amide coupling of a calix4]arene bearing carboxylic acid functionalities and (2) metallation with a lanthanide triflate salt. The ligand and its complexes were characterized by NMR (1H and 13C), fluorescence and UV-vis spectroscopy as well as MS. The photophysical properties of these complexes were studied; high molar absorptivity values, modest quantum yields and luminescence lifetimes on the ms timescale were obtained. Anion binding results in a change in the photophysical properties of the complexes. The anion sensing ability of the Tb(III) complex was evaluated via visual detection, UV-vis and fluorescence studies. The sensor was found to be responsive towards a variety of anions, and large binding constants were obtained for the coordination of anions to the sensor. |
| |
| Keywords: | calix[4]arene anion sensors lanthanides fluorescence studies UV– vis studies quantum yields lifetime measurements |
|
|
