NDLI: Non-covalent strategy for activating separation and detection functionality by use of the multifunctional host molecule thiacalixarene

Content Provider	Springer Nature Link
Author	Iki, buhiko
Copyright Year	2009
Abstract	This review article proposes a non-covalent strategy for activating separation and detection functionality; this strategy acts not through extensive organic synthesis to a covalently constructed molecular receptor, but by combining a simple molecular platform with a chemical “field” or functional component. For such a platform, we employed thiacalixarenes—calixarenes in which the bridging methylene groups are replaced with sulfur—to demonstrate usefulness of the non-covalent strategy and the multifunctionality of thiacalixarene. Thiacalixarene exhibits inherent abilities to recognize metal ions by coordinating with the bridging sulfur and adjacent phenol oxygen, as well as to include organic guest molecules in the cavity. Moreover, the non-covalent coupling of thiacalixarene provides systems with functions higher than thiacalixarene by itself. The functions described in this paper are as follows: (1) a 200-fold pre-concentration of heavy metal ions such as Cu$^{II}$, Cd$^{II}$, and Pb$^{II}$; (2) a pre-column derivatization reagent for the highly selective and sensitive determination of Ni$^{II}$, Al$^{III}$, Fe$^{III}$, and Ti$^{IV}$ at sub-ppb levels with reversed-phase HPLC; (3) the self-assembled formation of a luminescence receptor with Tb$^{III}$ ions for the detection of 10$^{−10}$ M levels of 1-ethylquinolinium guest; and (4) a sensing system for 10$^{−9}$ M levels of Ag$^{I}$ ions by the formation of the Ag$^{I}$-Tb$^{III}$-thiacalixarene ternary supramolecular complex. These examples support the non-covalent strategy as a highly promising way to obtain functions beyond that of a molecular platform. In addition, these diverse functions indicate the multifunctionality of thiacalixarene as well as its suitability to the non-covalent strategy, since the inherent functional groups—such as the bridging sulfur, phenol oxygen, p-substituent, aromatic ring, and hydrophobic cavity—synergistically perform the functions.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	09230750
Journal	Journal of Inclusion Phenomena and Macrocyclic Chemistry
Volume Number	64
Issue Number	1-2
e-ISSN	15731111
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-03-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Non-Covalent strategy Self-assembly Supramolecular chemistry Thiacalixarene Crystallography Food Science Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Food Science

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