scholarly journals Supramolecular polymerisation in water; elucidating the role of hydrophobic and hydrogen-bond interactions

Soft Matter ◽  
2016 ◽  
Vol 12 (11) ◽  
pp. 2887-2893 ◽  
Author(s):  
Christianus M. A. Leenders ◽  
Matthew B. Baker ◽  
Imke A. B. Pijpers ◽  
René P. M. Lafleur ◽  
Lorenzo Albertazzi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
The Self ◽  
Hydrogen Bond Interactions

The self-assembly of a family of benzene-1,3,5-tricarboxamides (BTAs) in water is studied systematically to elucidate the role of hydrophobic and hydrogen-bond interactions.

Synthesis and self-assembly of photopolymerizable quarterthiophenes

2006 ◽  
Vol 937 ◽  
Author(s):  
Margarita Garcia ◽  
E.W. Meijer ◽  
Albertus Schenning
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
The Self ◽  
Side Chain ◽  
Side Chains ◽  
Aggregate Formation ◽  
Hydrogen Bond Interactions ◽  
Π Stacking ◽  
Self Assembled ◽  
Polymerizable Group

ABSTRACTA variety of α, α'-subtituted quaterthiophenes containing ester, amide and polymerizable side chains have been synthesized and fully characterized. The self-assembly properties of these oligothiophenes were studied as function of the side chain. Introduction of amide functionalities highly promotes the self-assembly via π-stacking and hydrogen bond interactions, while the lack of amides prevent aggregate formation. Initial experiments show that by introducing a sorbyl moiety as a polymerizable group it is possible to achieve covalent fixation of the oligothiophene units in the self-assembled state.

Directive Effect of Chain Length in Modulating Peptide Nano-assemblies

2020 ◽  
Vol 27 (9) ◽  
pp. 923-929
Author(s):  
Gaurav Pandey ◽  
Prem Prakash Das ◽  
Vibin Ramakrishnan
Keyword(s):  
Electron Microscopy ◽  
Amino Acids ◽  
Light Scattering ◽  
Chain Length ◽  
Self Assembly ◽  
The Self ◽  
Ionic Charge ◽  
Self Assembling ◽  
Biophysical Techniques

Background: RADA-4 (Ac-RADARADARADARADA-NH2) is the most extensively studied and marketed self-assembling peptide, forming hydrogel, used to create defined threedimensional microenvironments for cell culture applications. Objectives: In this work, we use various biophysical techniques to investigate the length dependency of RADA aggregation and assembly. Methods: We synthesized a series of RADA-N peptides, N ranging from 1 to 4, resulting in four peptides having 4, 8, 12, and 16 amino acids in their sequence. Through a combination of various biophysical methods including thioflavin T fluorescence assay, static right angle light scattering assay, Dynamic Light Scattering (DLS), electron microscopy, CD, and IR spectroscopy, we have examined the role of chain-length on the self-assembly of RADA peptide. Results: Our observations show that the aggregation of ionic, charge-complementary RADA motifcontaining peptides is length-dependent, with N less than 3 are not forming spontaneous selfassemblies. Conclusion: The six biophysical experiments discussed in this paper validate the significance of chain-length on the epitaxial growth of RADA peptide self-assembly.

scholarly journals Understanding the role of conjugation length on the self-assembly behaviour of oligophenyleneethynylenes

2021 ◽  
Author(s):  
Beatriz Matarranz ◽  
Goutam Ghosh ◽  
Ramesh Kandanelli ◽  
Angel Sampedro ◽  
Kalathil K. Kartha ◽  
...  
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Conjugation Length ◽  
The Relationship

We unravel the relationship between conjugation length and self-assembly behaviour of oligophenyleneethynylenes (OPEs).

Role of Multivalent Cations in the Self-Assembly of Phospholipid−DNA Complexes

2007 ◽  
Vol 111 (51) ◽  
pp. 14233-14238 ◽  
Author(s):  
Guillaume Tresset ◽  
Wun Chet Davy Cheong ◽  
Yeng Ming Lam
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Dna Complexes

scholarly journals Crystalline modification of a rare earth nucleating agent for isotactic polypropylene based on its self-assembly

2018 ◽  
Vol 5 (5) ◽  
pp. 180247 ◽  
Author(s):  
Yuanming Zhang ◽  
Tingting Sun ◽  
Wei Jiang ◽  
Guangting Han
Keyword(s):  
Hydrogen Bond ◽  
Rare Earth ◽  
Isotactic Polypropylene ◽  
Self Assembly ◽  
Dendritic Structure ◽  
Nucleating Agent ◽  
The Self ◽  
Structure Evolution ◽  
Crystalline Modification ◽  
Assembly Structure

In this paper, the crystalline modification of a rare earth nucleating agent (WBG) for isotactic polypropylene (PP) based on its supramolecular self-assembly was investigated by differential scanning calorimetry, wide-angle X-ray diffraction and polarized optical microscopy. In addition, the relationship between the self-assembly structure of the nucleating agent and the crystalline structure, as well as the possible reason for the self-assembly behaviour, was further studied. The structure evolution of WBG showed that the self-assembly structure changed from a needle-like structure to a dendritic structure with increase in the content of WBG. When the content of WBG exceeded a critical value (0.4 wt%), it self-assembled into a strip structure. This revealed that the structure evolution of WBG contributed to the K β and the crystallization morphology of PP with different content of WBG. In addition, further studies implied that the behaviour of self-assembly was a liquid–solid transformation of WBG, followed by a liquid–liquid phase separation of molten isotactic PP and WBG. The formation of the self-assembly structure was based on the free molecules by hydrogen bond dissociation while being heated, followed by aggregation into another structure by hydrogen bond association while being cooled. Furthermore, self-assembly behaviour depends largely on the interaction between WBG themselves.

Self-Assembly of Alkali Lignin in Tetrahydrofuran

2012 ◽  
Vol 550-553 ◽  
pp. 57-61
Author(s):  
Hao Li ◽  
Yong Hong Deng ◽  
Kai Huang
Keyword(s):  
Charge Transfer ◽  
Electrostatic Interaction ◽  
Self Assembly ◽  
The Self ◽  
Charge Transfer Complexes ◽  
Layer By Layer ◽  
Alkali Lignin ◽  
Higher Temperature ◽  
Effects Of Temperature

Alkali lignin (AL) was used as a polyanion to form layer-by-layer self-assembled film with PDAC as a polycation. The effects of temperature and concentration on the adsorption characteristics of AL were investigated. Iodine was added into AL solutions to study the role of π-π interaction in self-assembly of AL and PDAC. Results show that the self-assembly of AL/PDAC is mainly driven by π-π interaction and electrostatic interaction. A higher temperature or a larger concentration can enhance the aggregation of lignin. I2 can form lignin–iodine charge–transfer complexes with AL to reduce the degree of aggregation of AL, so the adsorbed amount of AL decreases significantly with increasing iodine contents.

On the Role of Chirality in Guiding the Self-Assembly of Peptides

2017 ◽  
Vol 129 (43) ◽  
pp. 13473-13477 ◽  
Author(s):  
Shibaji Basak ◽  
Ishwar Singh ◽  
Annaleizle Ferranco ◽  
Jebreil Syed ◽  
Heinz-Bernhard Kraatz
Keyword(s):  
Self Assembly ◽  
The Self

Nanospheres from the self-assembly of an elastin-inspired triblock peptide

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95007-95013 ◽  
Author(s):  
A. Scelsi ◽  
B. Bochicchio ◽  
A. Smith ◽  
A. Saiani ◽  
A. Pepe
Keyword(s):  
Self Assembly ◽  
Conformational Flexibility ◽  
The Self ◽  
Π Stacking

The self-assembly of an elastin-inspired triblock peptide into nanospheres highlights the important role of conformational flexibility and π–π stacking.

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