Self-Assembly Behavior of A-B Diblock and C-D Random Copolymer Mixtures in the Solution State through Mediated Hydrogen Bonding

Langmuir ◽  
2008 ◽  
Vol 24 (15) ◽  
pp. 7727-7734 ◽  
Author(s):  
Chih-Hao Hsu ◽  
Shiao-Wei Kuo ◽  
Jem-Kun Chen ◽  
Fu-Hsiang Ko ◽  
Chun-Syong Liao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Random Copolymer ◽  
Solution State ◽  
Assembly Behavior

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.

Recording the Self-Assembly Behavior of Nanomaterials Directed by Hydrogen Bonding

2021 ◽  
Author(s):  
Ganghuo Pan ◽  
Jie Leng ◽  
Liye Deng ◽  
Liwen Xing ◽  
Rui Feng
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
The Self ◽  
Assembly Behavior

scholarly journals Self-Assembly of a Carboxyl-Functionalized BODIPY Dye via Hydrogen Bonding

Crystals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 436 ◽  
Author(s):  
Beatriz Matarranz ◽  
Angel Sampedro ◽  
Constantin G. Daniliuc ◽  
Gustavo Fernández
Keyword(s):  
Hydrogen Bonding ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Self Assembly ◽  
Acid Group ◽  
Carboxyl Groups ◽  
X Ray ◽  
Ftir Studies ◽  
Meso Position ◽  
Assembly Behavior

We report the synthesis, characterization, and self-assembly behavior of a 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) dye functionalized at the meso-position with a butyric acid group. Various spectroscopic investigations (UV-Vis, emission, and Fourier-transform infrared spectroscopy (FTIR) studies) supported by X-ray analysis revealed the formation of self-assembled structures in the solid state with translationally stacked BODIPY units driven by hydrogen bonding between the carboxyl groups.

Exocyclic self-assembly behavior of carboxylic acid and lariat ether macrocyclic hosts: regulation by pendent arm

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68864-68874
Author(s):  
Rong Guo ◽  
Wei Wang ◽  
Weiping Yang ◽  
Yuanyin Chen ◽  
Shuling Gong
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Self Assembly ◽  
Building Block ◽  
Hydrogen Bonding Interaction ◽  
Lariat Ether ◽  
Diazacrown Ethers ◽  
Bonding Interaction ◽  
Assembly Behavior

An exocyclic supramolecular building block through O–H⋯N hydrogen bonding interaction for the assembly of di-sidearm dibenzo-diazacrown ethers bearing a flexibility sidearm with PTA acid.

Controlled topologies and self-assembly behaviors of oligomeric supra-amphiphiles

2015 ◽  
Vol 51 (86) ◽  
pp. 15700-15703 ◽  
Author(s):  
Lijuan Shi ◽  
Nan Sun ◽  
Liqiang Zheng
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Fine Control ◽  
Assembly Behavior

Fine control of the topology and self-assembly behavior of oligomeric supra-amphiphiles was achieved by switching hydrogen bonding “on” and “off”.

Self-Assembly Behavior of Thermoresponsive Oligo(ethylene glycol) Methacrylates Random Copolymer

2012 ◽  
Vol 1 (5) ◽  
pp. 632-635 ◽  
Author(s):  
Baoliang Peng ◽  
Nathan Grishkewich ◽  
Zhaoling Yao ◽  
Xia Han ◽  
Honglai Liu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Self Assembly ◽  
Random Copolymer ◽  
Assembly Behavior

Cyclodextrin-tunable reversible self-assembly of a thermoresponsive Y-shaped polymer

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34557-34565
Author(s):  
Hao Yao ◽  
Wei Tian ◽  
Yuezhou Liu ◽  
Yang Bai ◽  
Dizheng Liu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Steric Hindrance ◽  
Self Assembly ◽  
Inclusion Complexation ◽  
Intermolecular Hydrogen Bonding ◽  
Assembly Behavior

The reversible self-assembly behavior of thermoresponsive γ-shaped polymer can be effectively tuned based on the inclusion complexation, intermolecular hydrogen bonding and steric hindrance of β-CD.

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