Use of Quadruple Hydrogen Bonding as the Switching Phase in Thermo- and Light-Responsive Shape Memory Hydrogel

2021 ◽  
Author(s):  
Yufang Song ◽  
Yiming Chen ◽  
Ran Chen ◽  
Hongji Zhang ◽  
Dongjian Shi ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Quadruple Hydrogen Bonding

Thermo- and water-induced shape memory poly(vinyl alcohol) supramolecular networks crosslinked by self-complementary quadruple hydrogen bonding

2016 ◽  
Vol 7 (43) ◽  
pp. 6637-6644 ◽  
Author(s):  
Hongmei Chen ◽  
Ying Li ◽  
Gong Tao ◽  
Lin Wang ◽  
Shaobing Zhou
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Donor Acceptor ◽  
Quadruple Hydrogen Bonding ◽  
Supramolecular Networks ◽  
First Time

Poly(vinyl alcohol) (PVA) supramolecular networks cross-linked by ureido-pyrimidinone (UPy) dimers via strong quadruple hydrogen bonding in donor–donor–acceptor–acceptor (DDAA) arrays have been synthesized for the first time.

scholarly journals Correction: One-way and two-way shape memory effects of a high-strain cis-1,4-polybutadiene–polyethylene copolymer based dynamic network via self-complementary quadruple hydrogen bonding

2019 ◽  
Vol 10 (24) ◽  
pp. 3399-3399
Author(s):  
Qi Yang ◽  
Wenjie Zheng ◽  
Wenpeng Zhao ◽  
Chuang Peng ◽  
Juntao Ren ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
High Strain ◽  
Dynamic Network ◽  
Memory Effects ◽  
Shape Memory Effects ◽  
Quadruple Hydrogen Bonding

Correction for ‘One-way and two-way shape memory effects of a high-strain cis-1,4-polybutadiene–polyethylene copolymer based dynamic network via self-complementary quadruple hydrogen bonding’ by Qi Yang, et al., Polym. Chem., 2019, 10, 718–726.

One-way and two-way shape memory effects of a high-strain cis-1,4-polybutadiene–polyethylene copolymer based dynamic network via self-complementary quadruple hydrogen bonding

2019 ◽  
Vol 10 (6) ◽  
pp. 718-726 ◽  
Author(s):  
Qi Yang ◽  
Wenjie Zheng ◽  
Wenpeng Zhao ◽  
Chuang Peng ◽  
Juntao Ren ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
High Strain ◽  
Polymer Network ◽  
Dynamic Network ◽  
Memory Effects ◽  
Strain Capacity ◽  
Shape Memory Effects ◽  
Quadruple Hydrogen Bonding

A polymer network based on a cis-1,4-polybutadiene–polyethylene copolymer exhibits multi- and two-way shape memory effects as well as a high-strain capacity.

scholarly journals Quadruple Hydrogen Bond-Containing A-AB-A Triblock Copolymers: Probing the Influence of Hydrogen Bonding in the Central Block

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4705
Author(s):  
Boer Liu ◽  
Xi Chen ◽  
Glenn A. Spiering ◽  
Robert B. Moore ◽  
Timothy E. Long
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Microphase Separation ◽  
Triblock Copolymers ◽  
Random Copolymer ◽  
Thermomechanical Properties ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Central Block ◽  
Quadruple Hydrogen Bonding

This work reveals the influence of pendant hydrogen bonding strength and distribution on self-assembly and the resulting thermomechanical properties of A-AB-A triblock copolymers. Reversible addition-fragmentation chain transfer polymerization afforded a library of A-AB-A acrylic triblock copolymers, wherein the A unit contained cytosine acrylate (CyA) or post-functionalized ureido cytosine acrylate (UCyA) and the B unit consisted of n-butyl acrylate (nBA). Differential scanning calorimetry revealed two glass transition temperatures, suggesting microphase-separation in the A-AB-A triblock copolymers. Thermomechanical and morphological analysis revealed the effects of hydrogen bonding distribution and strength on the self-assembly and microphase-separated morphology. Dynamic mechanical analysis showed multiple tan delta (δ) transitions that correlated to chain relaxation and hydrogen bonding dissociation, further confirming the microphase-separated structure. In addition, UCyA triblock copolymers possessed an extended modulus plateau versus temperature compared to the CyA analogs due to the stronger association of quadruple hydrogen bonding. CyA triblock copolymers exhibited a cylindrical microphase-separated morphology according to small-angle X-ray scattering. In contrast, UCyA triblock copolymers lacked long-range ordering due to hydrogen bonding induced phase mixing. The incorporation of UCyA into the soft central block resulted in improved tensile strength, extensibility, and toughness compared to the AB random copolymer and A-B-A triblock copolymer comparisons. This study provides insight into the structure-property relationships of A-AB-A supramolecular triblock copolymers that result from tunable association strengths.

Engineering bio-inspired peptide–polyurea hybrids with thermo-responsive shape memory behaviour

2021 ◽  
Author(s):  
Daseul Jang ◽  
Chase B. Thompson ◽  
Sourav Chatterjee ◽  
LaShanda T. J. Korley
Keyword(s):  
Hydrogen Bonding ◽  
Secondary Structure ◽  
Shape Memory ◽  
Shape Memory Behaviour ◽  
Peptide Secondary Structure

This paper highlights the influence of peptide secondary structure on the shape memory behaviour of peptidic polyureas, driven by hydrogen bonding arrangement and microphase-separated morphology.

Light-emitting iridium(iii) and ruthenium(ii) polypyridyl complexes containing quadruple hydrogen-bonding moieties

2006 ◽  
pp. 1636-1644 ◽  
Author(s):  
Veronica Marin ◽  
Elisabeth Holder ◽  
Richard Hoogenboom ◽  
Emine Tekin ◽  
Ulrich S. Schubert
Keyword(s):  
Hydrogen Bonding ◽  
Polypyridyl Complexes ◽  
Light Emitting ◽  
Quadruple Hydrogen Bonding
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