Saccharide-Functionalized Poly(Zn-salphen)-alt-(m- and p-phenyleneethynylene)s as Dynamic Helical Metallopolymers

Chao Zhao; Shuangshuang Meng; Hei Nga Chan; Xueli Wang; Hung Wing Li; Michael C.W. Chan

doi:10.1002/anie.202115712

Saccharide-Functionalized Poly(Zn-salphen)-alt-(m- and p-phenyleneethynylene)s as Dynamic Helical Metallopolymers

Chao Zhao, Shuangshuang Meng, Hei Nga Chan, Xueli Wang, Hung Wing Li^*, Michael C.W. Chan^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

4 Citations (Scopus)

Abstract

The study of metallopolymers with controllable helical sense remains in its infancy. We report arabinose-functionalized (Zn-salphen)-based conjugated polymers that display mirror-image circular dichroism spectra for L- and D-sugar sidechains respectively, signifying ordered (helical) coiling of the polymer backbone with opposite screw-sense preferences. The observation of different spectroscopic behavior and Cotton effects for a variety of solvents (in a reversible manner) and temperatures, ascribed to changes in the extent of intrachain (Zn⋅⋅⋅O(salphen) and π-stacking) interactions between Zn-salphen moieties, thus indicate the flexible, responsive and dynamic nature of the folded helical conformation in these systems. An application study signifying that activity can be governed by the structure and helical sense of the polymer is described.

Original language	English
Article number	e202115712
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	61
Issue number	9
Early online date	30 Dec 2021
DOIs	https://doi.org/10.1002/anie.202115712
Publication status	Published - 21 Feb 2022

User-Defined Keywords

Helical Structures
Metallopolymers
Optical Activity
Schiff Bases
Zinc

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10.1002/anie.202115712

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title = "Saccharide-Functionalized Poly(Zn-salphen)-alt-(m- and p-phenyleneethynylene)s as Dynamic Helical Metallopolymers",

abstract = "The study of metallopolymers with controllable helical sense remains in its infancy. We report arabinose-functionalized (Zn-salphen)-based conjugated polymers that display mirror-image circular dichroism spectra for L- and D-sugar sidechains respectively, signifying ordered (helical) coiling of the polymer backbone with opposite screw-sense preferences. The observation of different spectroscopic behavior and Cotton effects for a variety of solvents (in a reversible manner) and temperatures, ascribed to changes in the extent of intrachain (Zn⋅⋅⋅O(salphen) and π-stacking) interactions between Zn-salphen moieties, thus indicate the flexible, responsive and dynamic nature of the folded helical conformation in these systems. An application study signifying that activity can be governed by the structure and helical sense of the polymer is described.",

keywords = "Helical Structures, Metallopolymers, Optical Activity, Schiff Bases, Zinc",

author = "Chao Zhao and Shuangshuang Meng and Chan, {Hei Nga} and Xueli Wang and Li, {Hung Wing} and Chan, {Michael C.W.}",

note = "The work described in this paper was supported by the Research Grants Council of the Hong Kong SAR, China, and College of Science, City University of Hong Kong. We wish to thank Prof. Tony K. M. Shing for insightful suggestions on arabinose chemistry. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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AU - Chan, Hei Nga

AU - Wang, Xueli

AU - Li, Hung Wing

AU - Chan, Michael C.W.

N1 - The work described in this paper was supported by the Research Grants Council of the Hong Kong SAR, China, and College of Science, City University of Hong Kong. We wish to thank Prof. Tony K. M. Shing for insightful suggestions on arabinose chemistry. Publisher Copyright: © 2021 Wiley-VCH GmbH

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N2 - The study of metallopolymers with controllable helical sense remains in its infancy. We report arabinose-functionalized (Zn-salphen)-based conjugated polymers that display mirror-image circular dichroism spectra for L- and D-sugar sidechains respectively, signifying ordered (helical) coiling of the polymer backbone with opposite screw-sense preferences. The observation of different spectroscopic behavior and Cotton effects for a variety of solvents (in a reversible manner) and temperatures, ascribed to changes in the extent of intrachain (Zn⋅⋅⋅O(salphen) and π-stacking) interactions between Zn-salphen moieties, thus indicate the flexible, responsive and dynamic nature of the folded helical conformation in these systems. An application study signifying that activity can be governed by the structure and helical sense of the polymer is described.

AB - The study of metallopolymers with controllable helical sense remains in its infancy. We report arabinose-functionalized (Zn-salphen)-based conjugated polymers that display mirror-image circular dichroism spectra for L- and D-sugar sidechains respectively, signifying ordered (helical) coiling of the polymer backbone with opposite screw-sense preferences. The observation of different spectroscopic behavior and Cotton effects for a variety of solvents (in a reversible manner) and temperatures, ascribed to changes in the extent of intrachain (Zn⋅⋅⋅O(salphen) and π-stacking) interactions between Zn-salphen moieties, thus indicate the flexible, responsive and dynamic nature of the folded helical conformation in these systems. An application study signifying that activity can be governed by the structure and helical sense of the polymer is described.

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JO - Angewandte Chemie - International Edition

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Saccharide-Functionalized Poly(Zn-salphen)-alt-(m- and p-phenyleneethynylene)s as Dynamic Helical Metallopolymers

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