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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
INOR.P-9 |
| Subject |
Turn-On Fluorescence Sensing of Fluoride Ion by Donor-Antimony(V) Lewis Acids |
| Authors |
AJAY KUMAR, SURENDRAN SUJITH1, HeeChai Lee, Min Hyung Lee*
Department of Chemistry, University of Ulsan, Korea
1University of Ulsan, Korea
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| Abstract |
Fluoride sensing has been an important topic during the last decade because of the detrimental effect of fluoride in physiological systems. In particular, detection of fluoride at low concentrations, such as the parts per million level, in aqueous media has been an important issue from a practical point of view. In recent years, organoantimony(V) Lewis acid compounds are attracting growing interest due to their high binding affinity towards fluoride anion in both organic and aqueous media as well as turn-on fluorescence response upon fluoride complexation. In this work, a series of donor-Sb(V) stibonium compounds has been prepared bearing donor as 10H-phenoxazine (3a), diphenylamine(3b), and carbazole (3c) to investigate the change in photophysical properties upon fluoride binding. These stiboniums are almost nonemissive, but their fluorostiboranes display donor-centered fluorescence due to the locally excited ππ* state. The carbazole donor containing compound (3a) exhibits the most intense turn-on fluorescence response toward fluoride binding with a high binding constant (K > 107 M-1) in MeCN. Details of synthesis, characterization, and photophysical properties of Sb(V) stibonium compounds will be discussed. |
| E-mail |
ajaychem14@gmail.com |
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120th General Meeting of the KCS