PH-Controllable cyclic threading/dethreading of polypseudorotaxane obtained from cyclodextrins and poly(amino ester)

Guobin Sun; Decheng Wu; Ye Liu; Chaobin He; Tai Shung Chung; Suat Hong Goh

doi:10.1016/j.polymer.2005.02.090

PH-Controllable cyclic threading/dethreading of polypseudorotaxane obtained from cyclodextrins and poly(amino ester)

Guobin Sun, Decheng Wu, Ye Liu^*, Chaobin He, Tai Shung Chung, Suat Hong Goh

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Cyclic threading/dethreading of novel polypseudorotaxane obtained from β-cyclodextrins and poly(amino ester), poly(BDA-DEEDA), obtained from the Michael addition polymerization of 1,4-butanediol diacrylate (BDA) and N, N′-diethyl ethylenediamine (DEEDA), was realized by adjusting pH of the aqueous solutions between ca. 9.0 and 3.2 alternatively. ¹H NMR, XRD profiles, and ¹³C CP/MAS NMR verified the formation of polypseudorotaxane, and acid titration induced dethreaded structures were characterized using 2D ROESY NMR, ¹H NMR and XRD. The appearance/disappearance of precipitates, the kinetics, and the cyclic performance of pH controllable threading/dethreading processes were monitored by the changes in absorbance or transmittance of the solutions as reflected by UV experiments. Further pH-induced protonated and deprotonated states of poly(BDA-DEEDA) were demonstrated by ¹H NMR, which indicated the mechanism of the threading/dethreading processes.

Original language	English (US)
Pages (from-to)	3355-3362
Number of pages	8
Journal	Polymer
Volume	46
Issue number	10
DOIs	https://doi.org/10.1016/j.polymer.2005.02.090
State	Published - Apr 25 2005
Externally published	Yes

Keywords

Cyclodextrins
Polyrotaxanes
Self-assembly

ASJC Scopus subject areas

Materials Chemistry
Polymers and Plastics
Organic Chemistry

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10.1016/j.polymer.2005.02.090

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@article{656120a2bc5b4bcc9d54a725e4f731a1,

title = "PH-Controllable cyclic threading/dethreading of polypseudorotaxane obtained from cyclodextrins and poly(amino ester)",

abstract = "Cyclic threading/dethreading of novel polypseudorotaxane obtained from β-cyclodextrins and poly(amino ester), poly(BDA-DEEDA), obtained from the Michael addition polymerization of 1,4-butanediol diacrylate (BDA) and N, N′-diethyl ethylenediamine (DEEDA), was realized by adjusting pH of the aqueous solutions between ca. 9.0 and 3.2 alternatively. 1H NMR, XRD profiles, and 13C CP/MAS NMR verified the formation of polypseudorotaxane, and acid titration induced dethreaded structures were characterized using 2D ROESY NMR, 1H NMR and XRD. The appearance/disappearance of precipitates, the kinetics, and the cyclic performance of pH controllable threading/dethreading processes were monitored by the changes in absorbance or transmittance of the solutions as reflected by UV experiments. Further pH-induced protonated and deprotonated states of poly(BDA-DEEDA) were demonstrated by 1H NMR, which indicated the mechanism of the threading/dethreading processes.",

keywords = "Cyclodextrins, Polyrotaxanes, Self-assembly",

author = "Guobin Sun and Decheng Wu and Ye Liu and Chaobin He and Chung, {Tai Shung} and Goh, {Suat Hong}",

year = "2005",

month = apr,

day = "25",

doi = "10.1016/j.polymer.2005.02.090",

language = "English (US)",

volume = "46",

pages = "3355--3362",

journal = "Polymer",

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TY - JOUR

T1 - PH-Controllable cyclic threading/dethreading of polypseudorotaxane obtained from cyclodextrins and poly(amino ester)

AU - Sun, Guobin

AU - Wu, Decheng

AU - Liu, Ye

AU - He, Chaobin

AU - Chung, Tai Shung

AU - Goh, Suat Hong

PY - 2005/4/25

Y1 - 2005/4/25

N2 - Cyclic threading/dethreading of novel polypseudorotaxane obtained from β-cyclodextrins and poly(amino ester), poly(BDA-DEEDA), obtained from the Michael addition polymerization of 1,4-butanediol diacrylate (BDA) and N, N′-diethyl ethylenediamine (DEEDA), was realized by adjusting pH of the aqueous solutions between ca. 9.0 and 3.2 alternatively. 1H NMR, XRD profiles, and 13C CP/MAS NMR verified the formation of polypseudorotaxane, and acid titration induced dethreaded structures were characterized using 2D ROESY NMR, 1H NMR and XRD. The appearance/disappearance of precipitates, the kinetics, and the cyclic performance of pH controllable threading/dethreading processes were monitored by the changes in absorbance or transmittance of the solutions as reflected by UV experiments. Further pH-induced protonated and deprotonated states of poly(BDA-DEEDA) were demonstrated by 1H NMR, which indicated the mechanism of the threading/dethreading processes.

AB - Cyclic threading/dethreading of novel polypseudorotaxane obtained from β-cyclodextrins and poly(amino ester), poly(BDA-DEEDA), obtained from the Michael addition polymerization of 1,4-butanediol diacrylate (BDA) and N, N′-diethyl ethylenediamine (DEEDA), was realized by adjusting pH of the aqueous solutions between ca. 9.0 and 3.2 alternatively. 1H NMR, XRD profiles, and 13C CP/MAS NMR verified the formation of polypseudorotaxane, and acid titration induced dethreaded structures were characterized using 2D ROESY NMR, 1H NMR and XRD. The appearance/disappearance of precipitates, the kinetics, and the cyclic performance of pH controllable threading/dethreading processes were monitored by the changes in absorbance or transmittance of the solutions as reflected by UV experiments. Further pH-induced protonated and deprotonated states of poly(BDA-DEEDA) were demonstrated by 1H NMR, which indicated the mechanism of the threading/dethreading processes.

KW - Cyclodextrins

KW - Polyrotaxanes

KW - Self-assembly

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U2 - 10.1016/j.polymer.2005.02.090

DO - 10.1016/j.polymer.2005.02.090

M3 - Article

AN - SCOPUS:16244421422

SN - 0032-3861

VL - 46

SP - 3355

EP - 3362

JO - Polymer

JF - Polymer

IS - 10

ER -

PH-Controllable cyclic threading/dethreading of polypseudorotaxane obtained from cyclodextrins and poly(amino ester)

Abstract

Keywords

ASJC Scopus subject areas

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