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Calixarene-based photoresponsive ion carrier for the control of Na+ flux across a lipid bilayer membrane by visible light
| Title: | Calixarene-based photoresponsive ion carrier for the control of Na+ flux across a lipid bilayer membrane by visible light |
| Authors: | Jin, Takashi Browse this author |
| Keywords: | Azobenzene | | Calixarene | | Carrier | | Ion flux | | Lipid bilayer membrane | | Photocontrol |
| Issue Date: | Feb-2007 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Materials Letters |
| Volume: | 61 |
| Issue: | 3 |
| Start Page: | 805 |
| End Page: | 808 |
| Publisher DOI: | 10.1016/j.matlet.2006.05.064 |
| Abstract: | A photoresponsive ion carrier based on calix[4]arene was synthesized for the control of Na+ flux across lipid bilayer membranes by visible light. Calix[4]arene was chosen as a basic skeleton of a photoresponsive ion carrier because its ether derivatives are known to act as Na+ ion carriers in lipid bilayer membranes. For the synthesis of a photoresponsive carrier, dimethylaminoazobenzene was introduced as a photochromic moiety to an ether derivative of p-tert-butylcalix[4]arene. The ion transport ability of the dimethylaminoazobenzene appended calix[4]arene was examined by using a voltage-clamp method. When the calix[4]arene derivative was incorporated into a planar lipid bilayer membrane which separated two chambers filled with 100 mM of NaCl solutions, membrane currents resulting from Na+ flux were observed under applying external voltages between two chambers. The concentration dependence of the calix[4]arene derivative on the membrane currents indicated the formation of a 1:1 complex with Na+ ions for the calix[4]arene-mediated ion transport across the lipid bilayer membrane. By using visible light (> 400 nm), Na+ flux across lipid bilayer membranes containing the dimethylaminoazobenzene appended calix[4]arene derivative could be controlled. |
| Relation: | http://www.sciencedirect.com/science/journal/0167577X |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/17193 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 神 隆
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