Hydrogen Bond Interactions Mediate Hierarchical Self-Assembly of POSS-Containing Block Copolymers Blended with Phenolic Resin

2014 ◽  
Vol 47 (24) ◽  
pp. 8709-8721 ◽  
Author(s):  
Chin-Wei Chiou ◽  
Yung-Chih Lin ◽  
Lei Wang ◽  
Rina Maeda ◽  
Teruaki Hayakawa ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Block Copolymers ◽  
Self Assembly ◽  
Phenolic Resin ◽  
Hydrogen Bond Interactions

scholarly journals Interactions of Aggregating Peptides Probed by IR-UV Action Spectroscopy

2018 ◽  
Author(s):  
Sjors Bakels ◽  
E.M. Meijer ◽  
Mart Greuell ◽  
Sebastiaan Porskamp ◽  
George Rouwhorst ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Self Assembly ◽  
Intermolecular Hydrogen Bond ◽  
Beta Sheet ◽  
Dispersion Interactions ◽  
Intramolecular Hydrogen Bonds ◽  
Action Spectroscopy ◽  
Hydrogen Bond Interactions ◽  
Intramolecular Hydrogen

Peptide aggregation, the self-assembly of peptides into structured beta-sheet fibril structures, is driven by a combination of intra- and intermolecular interactions. Here, the interplay between intramolecular and formed inter-sheet hydrogen bonds and the effect of dispersion interactions on the formation of neutral, isolated, peptide dimers is studied by infrared action spectroscopy. Therefore, four different homo- and hetereogeneous dimers formed from three different alanine-based model peptides have been studied under controlled and isolated conditions. The peptides differ from one another in the presence and location of a UV chromophore containing cap on either the C- or N-terminus. Conformations of the monomers of the peptides direct the final dimer structure: strongly hydrogen bonded or folded structures result in weakly bound dimers. Here the intramolecular hydrogen bonds are favored over new intermolecular hydrogen bond interactions. In contrast, linearly folded monomers are the ideal template to form parallel beta-sheet type structures. The weak intramolecular hydrogen bonds present in the linear monomers are replaced by the stronger inter-sheet hydrogen bond interactions. The influence of π-π disperion interactions on the structure of the dimer is minimal, the phenyl rings have the tendency to fold away from the peptide backbone to favour intermolecular hydrogen bond interactions. Quantum chemical calculations confirm our experimental observations.

Hydrogen Bond Induces Hierarchical Self-Assembly in Liquid-Crystalline Block Copolymers

2018 ◽  
Vol 39 (6) ◽  
pp. 1700783 ◽  
Author(s):  
Shuai Huang ◽  
Linlin Pang ◽  
Yuxuan Chen ◽  
Liming Zhou ◽  
Shaoming Fang ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Block Copolymers ◽  
Self Assembly ◽  
Liquid Crystalline

Novel supramolecular self-assembly of a transition-metal–organo network based on simultaneous coordinate- and hydrogen-bond interactions

1996 ◽  
pp. 899-900 ◽  
Author(s):  
Mubarik M. Chowdhry ◽  
D. Michael P. Mingos ◽  
Andrew J. P. White ◽  
David J. Williams
Keyword(s):  
Hydrogen Bond ◽  
Transition Metal ◽  
Self Assembly ◽  
Hydrogen Bond Interactions

Interactions of Aggregating Peptides Probed by IR-UV Action Spectroscopy

2018 ◽  
Author(s):  
Sjors Bakels ◽  
E.M. Meijer ◽  
Mart Greuell ◽  
Sebastiaan Porskamp ◽  
George Rouwhorst ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Self Assembly ◽  
Intermolecular Hydrogen Bond ◽  
Beta Sheet ◽  
Dispersion Interactions ◽  
Intramolecular Hydrogen Bonds ◽  
Action Spectroscopy ◽  
Hydrogen Bond Interactions ◽  
Intramolecular Hydrogen

Peptide aggregation, the self-assembly of peptides into structured beta-sheet fibril structures, is driven by a combination of intra- and intermolecular interactions. Here, the interplay between intramolecular and formed inter-sheet hydrogen bonds and the effect of dispersion interactions on the formation of neutral, isolated, peptide dimers is studied by infrared action spectroscopy. Therefore, four different homo- and hetereogeneous dimers formed from three different alanine-based model peptides have been studied under controlled and isolated conditions. The peptides differ from one another in the presence and location of a UV chromophore containing cap on either the C- or N-terminus. Conformations of the monomers of the peptides direct the final dimer structure: strongly hydrogen bonded or folded structures result in weakly bound dimers. Here the intramolecular hydrogen bonds are favored over new intermolecular hydrogen bond interactions. In contrast, linearly folded monomers are the ideal template to form parallel beta-sheet type structures. The weak intramolecular hydrogen bonds present in the linear monomers are replaced by the stronger inter-sheet hydrogen bond interactions. The influence of π-π disperion interactions on the structure of the dimer is minimal, the phenyl rings have the tendency to fold away from the peptide backbone to favour intermolecular hydrogen bond interactions. Quantum chemical calculations confirm our experimental observations.

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.

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