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Design of Supramolecular Cyclodextrin Complex Sensors for Ion and Molecule Recognition in Water |
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| Authors: | Takashi Hayashita Akiyo Yamauchi Ai-Jun Tong Jong Chan Lee Bradley D Smith Norio Teramae |
| Institution: | (1) Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan;(2) Department of Chemistry, Tsinghua University, Beijing, PR 100084, China;(3) Department of Chemistry, Chung-Ang University, Seoul, 156-756, Korea;(4) Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA |
| Abstract: | The design and function of novel supramolecular fluoroionophore/cyclodextrin (CyD) complex sensors for ion and molecule recognition in water are reviewed. For the crown ether fluoroionophore/ -CyD complex, the dimerization of the fluoroionophore inside the -CyD is found to be selectively promoted by alkali metal ion binding, thereby resulting in metal-ion-selective pyrene dimer emission in water. This supramolecular function is successfully utilized in the design of a podand fluoroionophore/-CyD complex for sensing toxic lead ion in water. The boronic acid fluoroionophore/ -CyD complex binds sugars and produces increased fluorescence emission in water. The response mechanism appears to be due to the suppression of the photoinduced electron transfer (PET) from pyrene donor to trigonal phenylboronic acid acceptor. This is a novel emission function provided by the boronic acid fluoroionophore/-CyD complex sensors in water. |
| Keywords: | alkali metal ion cyclodextrin fluoroionophore lead ion sugar supramolecular sensor |
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