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Synthesis of pyrenylcalix[4]arene-calix[4]pyrrole as fluorogenic sensor for anion |
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| รหัสดีโอไอ | |
| Title | Synthesis of pyrenylcalix[4]arene-calix[4]pyrrole as fluorogenic sensor for anion |
| Creator | Preecha Thiampanya |
| Contributor | Buncha Pulpoka |
| Publisher | Chulalongkorn University |
| Publication Year | 2549 |
| Keyword | Anions, Calixarenes |
| Abstract | A fluorogenic sensor for anion, pyrenylcalix[4]arene-calix[4]pyrrole (7), was successfully synthesized and characterized by spectroscopic techniques. It was revealed that the conformations of calix[4]arene and calix[4]pyrrole of 7 are in cone and 1,3-alternate manners, respectively. The glycolic spacers are in trans-position. Anion complexation studies of ligand 7 were carried with tetrabutylammonium salts by fluorescence spectroscopy. The spectra of all complexes exhibited an increase of monomer fluorescence emission at wavelengths of 376 and 396 nm when excited at 343 nm by a PET-based mechanism. According to fluorescence titrations, fluorogenic sensor 7 formed complexes with high affinity to fluoride following by acetate, chloride, bromide, benzoate, ions with logK of 3.45, 3.25, 1.74, 1.62 and 1.28 respectively. An addition of excesses fluoride ion to a solution of 7 resulted in a color change of solution of 7 and fluorescence quenching at visible region. |
| URL Website | cuir.car.chula.ac.th |
