Journal
TETRAHEDRON LETTERS
Volume 51, Issue 47, Pages 6156-6160Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2010.09.067
Keywords
Calix[4]arene; Molecular recognition; Receptor; Host-guest systems; Gate and portals; Hydrophobic cavity
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Funding
- Ministry of Education, Science and Technology (MEST)
- Korea Industrial Technology Foundation (KOTEF)
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The pH of a solution shows a significant effect on the dynamics of the gate (formed by eight benzylic functions) and portal on the hydrophobic cavity of receptor. At pH 5.8 the gate closes and prohibits the entry of anionic guests. However, at pH 7.3 the gate opens and allows the entry of anionic guests into the hydrophobic cavity. It is the first time that anionic receptor efficiently recognizes anionic guests. (C) 2010 Elsevier Ltd. All rights reserved.
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