NDLI: Allosteric bindings of thiacalix[4]arene-based receptors with 1,3-alternate conformation having two different side arms

Content Provider	Springer Nature Link
Author	Pérez Casas, Carol Rahman, Shofiur Begum, Nazneen Xi, Zeng Yamato, Takehiko
Copyright Year	2007
Abstract	A novel ditopic receptor possessing two complexation sites such as crown ether and 2-pyridylmethyl groups bearing 1,3-alternate conformation based on thiacalix[4]arene was prepared. The binding behaviors with Li$^{+}$ and Ag$^{+}$ have been examined by $^{1}$H NMR titration experiment. The exclusive formation of mononuclear complexes of 1,3-alternate-5 with Li$^{+}$ and Ag$^{+}$ was observed even though the formation of the heterogeneous dinuclear complexes was expected. The decomplexation of Li$^{+}$ from the crown moiety of 1:1 complex 1,3-alternate-5⊃Li$^{+}$ to form the Ag$^{+}$⊂1,3-alternate-5 complex by addition of AgSO$_{3}$CF$_{3}$ clearly shows that pyridyl moiety works as an efficient switch-off of the recognition ability of the crown moiety. We have also developed the construction of hydrogen-bonding self-assembly heterodimeric systems based on bis(4-pyridyl) and dicarboxylic acid thiacalix[4]arene derivatives in 1,3-alternate conformation. Their supramolecular behaviors are studied by $^{1}$H NMR titration experiments with K$^{+}$ and Ag$^{+}$ ions. Although the values of the dimerization constants are relatively small, the stability of the dimers is strong enough to overcome only small conformational changes upon complex formation.
Starting Page	173
Ending Page	185
Page Count	13
File Format	PDF
ISSN	09230750
Journal	Journal of Inclusion Phenomena and Macrocyclic Chemistry
Volume Number	60
Issue Number	1-2
e-ISSN	15731111
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-09-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thiacalix[4]arenas Crownethers Conformation Metal complexation Allosteric effect Hydrogen bond Self-assembly Heterodimeric systems Crystallography Food Science Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Food Science

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