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Title: Rational Control of Self‐Recognition of Macroionic γ‐Cyclodextrin by Host‐Guest Interaction with Super‐Chaotropic Borate Cluster Ions
Abstract

We report a feasible method to control self‐recognition during the self‐assembly of a hydrophilic macroion, phosphate‐functionalized γ‐cyclodextrin (γ‐CD‐P), though host‐guest interactions. We confirmed that γ‐CD‐P can form a host‐guest complex with a super‐chaotropic anion, namely the B12F122−borate cluster, by using NMR spectroscopy and isothermal titration calorimetry. The loaded γ‐CD‐P, which has a higher charge density, can be distinguished from the uncomplexed γ‐CD‐P, leading to self‐sorting behavior during the self‐assembly process, confirmed by the formation of two types of individual supramolecular structures (Rhof ca. 57 nm and 18 nm, determined by light scattering) instead of hybrid structures in mixed dilute solution. This self‐recognition behavior is accounted for by the difference in intermolecular electrostatic interactions arising from the loading.

 
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Award ID(s):
1904397 1665284
NSF-PAR ID:
10238636
Author(s) / Creator(s):
 ;  ;  ;  ;  
Publisher / Repository:
Wiley Blackwell (John Wiley & Sons)
Date Published:
Journal Name:
ChemPlusChem
Volume:
85
Issue:
10
ISSN:
2192-6506
Page Range / eLocation ID:
p. 2316-2319
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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