High-performance fibers based on copolyimides containing benzimidazole and ether moieties: Molecular packing, morphology, hydrogen-bonding interactions and properties

2015 ◽  
Vol 55 (11) ◽  
pp. 2615-2625 ◽  
Author(s):  
Mengying Zhang ◽  
Hongqing Niu ◽  
Jingjing Chang ◽  
Qiyan Ge ◽  
Li Cao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
High Performance ◽  
Molecular Packing ◽  
Hydrogen Bonding Interactions

scholarly journals Boosting Performance of Self-Polarized Fully Printed Piezoelectric Nanogenerators via Modulated Strength of Hydrogen Bonding Interactions

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1908
Author(s):  
Hai Li ◽  
Sooman Lim
Keyword(s):  
Hydrogen Bonding ◽  
Composite Film ◽  
High Performance ◽  
Composite Films ◽  
Β Phase ◽  
Hydrogen Bonding Interactions ◽  
Barium Titanate Nanoparticles ◽  
Surface Modified ◽  
Piezoelectric Devices ◽  
Piezoelectric Nanogenerators

Self-polarized piezoelectric devices have attracted significant interest owing to their fabrication processes with low energy consumption. Herein, novel poling-free piezoelectric nanogenerators (PENGs) based on self-polarized polyvinylidene difluoride (PVDF) induced by the incorporation of different surface-modified barium titanate nanoparticles (BTO NPs) were prepared via a fully printing process. To reveal the effect of intermolecular interactions between PVDF and NP surface groups, BTO NPs were modified with hydrophilic polydopamine (PDA) and hydrophobic 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) to yield PDA-BTO and PFD-BTO, respectively. This study demonstrates that the stronger hydrogen bonding interactions existed in PFD-BTO/PVDF composite film comparative to the PDA-BTO/PVDF composite film induced the higher β-phase formation (90%), which was evidenced by the XRD, FTIR and DSC results, as well as led to a better dispersion of NPs and improved mechanical properties of composite films. Consequently, PFD-BTO/PVDF-based PENGs without electric poling exhibited a significantly improved output voltage of 5.9 V and power density of 102 μW cm−3, which was 1.8 and 2.9 times higher than that of PDA-BTO/PVDF-based PENGs, respectively. This study provides a promising approach for advancing the search for high-performance, self-polarized PENGs in next-generation electric and electronic industries.

Hydrogen bond-modulated molecular packing and its applications in high-performance non-doped organic electroluminescence

2020 ◽  
Vol 7 (10) ◽  
pp. 2734-2740
Author(s):  
Yizhong Shi ◽  
Kai Wang ◽  
Youichi Tsuchiya ◽  
Wei Liu ◽  
Takeshi Komino ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
High Performance ◽  
Molecular Packing ◽  
Intermolecular Hydrogen Bonding ◽  
Supramolecular Framework ◽  
Organic Electroluminescence

Suitable intermolecular hydrogen bonding enables the formation of a fixed 3D supramolecular framework and suppresses the exciton nonradiative decays and quenching.

scholarly journals Investigation of the solvent-dependent photolysis of a nonnucleoside reverse-transcriptase inhibitor, antiviral agent efavirenz

2017 ◽  
Vol 25 (3) ◽  
pp. 94-104
Author(s):  
Maryam A Jordaan ◽  
Michael Shapi
Keyword(s):  
Hydrogen Bonding ◽  
High Performance ◽  
Antiviral Agent ◽  
Energy Shift ◽  
Transcriptase Inhibitor ◽  
Intramolecular Proton Transfer ◽  
Biologically Active ◽  
Hydrogen Bond Donor ◽  
Flight Mass Spectrometry ◽  
Hydrogen Bonding Interactions

This study sought to investigate the solvent-dependency on the photolysis of efavirenz to gain insight into the photoprocesses involved. The primary mechanisms were firstly the excited-state intramolecular proton transfer (i.e. phototautomerization), which generated the imidic acid phototautomer observed as [M-H]− quasimolecular ion at m/z 314.0070 in the high-performance liquid chromatography–electrospray ionization–time-of-flight mass spectrometry in the negative mode. Secondly, the photoinduced α-cleavage with the loss of a carbonyl group occurred (i.e. photodecarbonylation) to form the photoproduct at m/z 286.0395. The ultraviolet–visible spectra illustrated a large, hyperchromic, and slight bathochromic effect in both the π→π* and n→π* electronic transitions. The largest bathochromic effect was prevalent in the chloroform solvent, i.e. chloroform (π* = 0.58; β = 0.00; α = 0.44) > methanol (π* = 0.60; β = 0.66; α = 0.98) > acetonitrile (π* = 0.75; β = 0.40; α = 0.19). This is due to the significant interaction of the amino group with the excited carbonyl moiety which is attributed to intramolecular phototautomerization resulting in a larger energy shift of the electronic state. A plausible explanation is due to the hydrogen bond donor ability of the polar methanol and nonpolar chloroform solvents, which stabilized the polarized imidic acid phototautomer by means of hydrogen bonding interactions, as opposed to the aprotic acetonitrile which exhibits no hydrogen bonding interactions. The study would form the basis for further photolytic analyses and syntheses to generate a plethora of novel photoproducts with anti-HIV activity based on the biologically active benzoxazinone framework of efavirenz.

Hydrogen-Bonding Interactions and Molecular Packing in Polyimide Fibers Containing Benzimidazole Units

2014 ◽  
Vol 299 (10) ◽  
pp. 1170-1179 ◽  
Author(s):  
Jie Dong ◽  
Chaoqing Yin ◽  
Zixin Zhang ◽  
Xinyu Wang ◽  
Haibei Li ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Packing ◽  
Polyimide Fibers ◽  
Hydrogen Bonding Interactions

(R)-2,2′-Bis(methoxymethoxy)-1,1′-binaphthalenyl-3-carbaldehyde

2006 ◽  
Vol 62 (4) ◽  
pp. o1243-o1244
Author(s):  
Wei-Zhu Chen ◽  
Hua Fang ◽  
Qing-Le Zeng ◽  
Peng-Xiang Xu ◽  
Yu-Fen Zhao
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Molecular Packing ◽  
Compound C ◽  
Hydrogen Bonding Interactions

The title compound, C25H22O5, was obtained from (R)-2,2′-bis(methoxymethoxy)-1,1′-binaphthalenyl by ortho-lithiation and quenching with N,N-dimethylformaldehyde. The molecular packing in the crystal structure is stabilized by weak C—H...O hydrogen-bonding interactions.

Towards a tough reprocessable and self-healable acrylonitrile-butadiene rubber based on strong hydrogen bonding interactions

2021 ◽  
Author(s):  
Wenyan Wang ◽  
Weicheng Zhang ◽  
Zongxu Liu ◽  
Ying Xue ◽  
Xingfeng Lei ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
High Performance ◽  
Butadiene Rubber ◽  
Acrylonitrile Butadiene Rubber ◽  
Hydrogen Bonding Interactions

Tough reprocessable and self-healable acrylonitrile-butadiene rubber (NBR) is developed by grafting 2-ureido-4[1H]-pyrimidinone groups onto the backbone of amidoxime NBR, representing a big step in recyclable high-performance NBR.

Theoretical study of hydrogen bonding interactions in substituted nitroxide radicals

2021 ◽  
Author(s):  
Thufail M. Ismail ◽  
Neetha Mohan ◽  
P. K. Sajith
Keyword(s):  
Hydrogen Bonding ◽  
Interaction Energy ◽  
Electrostatic Potential ◽  
Molecular Electrostatic Potential ◽  
Theoretical Study ◽  
Nitroxide Radicals ◽  
Hydrogen Bonding Interactions ◽  
Bonded Complexes ◽  
Hydrogen Bonded

Interaction energy (Eint) of hydrogen bonded complexes of nitroxide radicals can be assessed in terms of the deepest minimum of molecular electrostatic potential (Vmin).

scholarly journals Circular linkage of intramolecular multi-hydrogen bonding frameworks through nucleophilic substitutions of β-dicarbonyls onto cyanuric chloride and subsequent tautomerisation

RSC Advances ◽  
2020 ◽  
Vol 10 (64) ◽  
pp. 39033-39036
Author(s):  
Ayano Awatani ◽  
Masaaki Suzuki
Keyword(s):  
Hydrogen Bonding ◽  
Cyanuric Chloride ◽  
Nucleophilic Substitutions ◽  
Hydrogen Bonding Interactions ◽  
Triazine Derivatives

Triply β-dicarbonyl-embedded 1,3,5-triazine derivatives result in formation of circular linkage of resonance-assisted hydrogen bonding interactions, which can be regarded as well-delocalized resonance hybrids.

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