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ID 46211
file
creator
Mae, Tomoya
Konishi, Toshifumi
subject
cyclodextrins
fullerenes
host-guest systems
pseudorotaxanes
NMR spectroscopy
NDC
Chemistry
abstract
Fullerenes (C60 and C70) and several functionalized C60 derivatives can be encapsulated in two γ-cyclodextrins (γ-CDxs). Although intermolecular complexation–decomplexation exchange of γ-CDx is known to be very slow, the exchange rates have yet to be quantitatively measured. Herein, we determined that the pseudo-firstorder association and dissociation rate constants for the γ-CDx2•C70 complex were 4.3 and 0.6 s−1 at 23℃, respectively. In contrast, the intermolecular exchange rates for the γ-CDx2•C60 and C60 derivative complexes were slower than the time scale of exchange spectroscopy NMR experiments and the exchange rate constants were in the order of 10−4 s−1. Furthermore, a γ-CDx2•C60 derivative complex was shown to have different intermolecular exchange rates for the two γ-CDxs depending on steric hindrance from the substituent on the C60 derivative.
description
This work was supported by JSPS KAKENHI Grant-in-Aid for Scientific Research (B) (Grant No. JP16H04133) and Grant-in-Aid for Challenging Exploratory Research (Grant No. JP16K13982).
journal title
Chemistry Select
volume
Volume 2
issue
Issue 34
start page
11322
end page
11327
date of issued
2017-12-01
publisher
Wiley-VCH
issn
2365-6549
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
This is the accepted version of the following article: A. Ikeda, T. Mae, K. Sugikawa, K. Komaguchi, T. Konishi, T. Hirao, and T. Haino, Slow Intermolecular Complexation–Decomplexation Exchanges of Cyclodextrins in Fullerene and Its Derivative Complexes, Chemistry Select, 2, 11322–11327, 2017, which has been published in final form at http://doi.org/10.1002/slct.201702319. This article may be used for non-commercial purposes in accordance with Wiley Self-Archiving Policy.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
department
Graduate School of Engineering
Graduate School of Science
note
Post-print version/PDF may be used in an institutional repository after an embargo period of 12 months.