Fluorescent change of pyreneamide bearing calix[4]crown-5: INHIBIT logic gate in K+-induced H2PO4- complexation
- Authors
- Choi, Jung Kyu; No, Kwanghyun; Lee, Eil-Hee; Kwon, Seon-Gil; Kim, Kwang-Wook; Kim, Jong Seung
- Issue Date
- Jun-2007
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- calixarene; logic gate; fluorescence; metal ion complexation
- Citation
- SUPRAMOLECULAR CHEMISTRY, v.19, no.4-5, pp 283 - 286
- Pages
- 4
- Journal Title
- SUPRAMOLECULAR CHEMISTRY
- Volume
- 19
- Number
- 4-5
- Start Page
- 283
- End Page
- 286
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/14990
- DOI
- 10.1080/10610270701258386
- ISSN
- 1061-0278
1029-0478
- Abstract
- The fluorescence excimer emission of 1 is found to be enhanced upon the addition of K+ ion which is due to a conformational change of the ligand to have a more efficient pi-pi* interaction of two pyrenes. By contrast, no fluorescence change of 1 was observed in the anion binding test with F-, Cl-, Br-, I-, CH3CO2-, HSO4-, and H2PO4- as their tetrabutylammonium salts in MeCN. Interestingly, it was observed that the excimer emission of the two pyrenes decreases upon the addition of CH3CO2- or H2PO4- in the 1.K+ complex solution. This is presumably due to a conformational change of the ligand by K+ ion binding, which induces the better conformation of two facing pyrene amides to selectively adopt CH3CO2- or H2PO4- ion. This allosterical anion complexation could be applicable for NOR and INHIBIT (INH) logic gates.
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