scholarly journals Characterization of Individual Hydrogen Bonds in Crystalline Regenerated Cellulose Using Resolved Polarized FTIR Spectra

ACS Omega ◽  
2017 ◽  
Vol 2 (4) ◽  
pp. 1469-1476 ◽  
Author(s):  
Yukako Hishikawa ◽  
Eiji Togawa ◽  
Tetsuo Kondo
Keyword(s):  
Hydrogen Bonds ◽  
Ftir Spectra ◽  
Regenerated Cellulose ◽  
Polarized Ftir

scholarly journals Characterization of essential oils extracted from different aromatic plants by FTIR spectroscopy

2017 ◽  
Vol 74 (1) ◽  
pp. 37 ◽  
Author(s):  
Maria Ioana MORAR ◽  
Florinela FETEA ◽  
Ancuta Mihaela ROTAR ◽  
Melinda NAGY ◽  
Cristina Anamaria SEMENIUC
Keyword(s):  
Essential Oils ◽  
Ftir Spectroscopy ◽  
Ftir Spectra ◽  
Aromatic Plants

Four essential oils isolated from dried leaves of parsley, lovage, basil, and thyme were investigated by FTIR spectroscopy. FTIR spectra revealed characteristic key bands for the main compounds of tested essential oils.

4-(Piperidin-1-yl)pyridinium hexafluorophosphate at 150 K

2003 ◽  
Vol 59 (11) ◽  
pp. o622-o624 ◽  
Author(s):  
Bruce D. James ◽  
Siti Mutrofin ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Title Compound ◽  
Ion Pairs ◽  
Piperidine Ring ◽  
Torsion Angles ◽  
Compound C ◽  
Counter Ions

Structural characterization of the title compound, C10H15N2 +·PF6 −, shows it to be ionic, with the pyridine rather than the piperidine N atom being protonated and forming hydrogen bonds to the counter-ions, resulting in two independent ion pairs. A number of unusual features are noted, in particular the remarkably close inter-ring hydrogen contacts [1.97 (3)–2.00 (3) Å] and the considerable differences in the pair of cations, in respect of the torsion angles within the piperidine ring involving the bonds to either side of the N atom.

Rapid characterization of GC-FTIR spectra by a PCA-based expert system

1992 ◽  
Author(s):  
Erik J. Hasenoehrl ◽  
Jonathan H. Perkins ◽  
Peter R. Griffiths
Keyword(s):  
Expert System ◽  
Ftir Spectra ◽  
Rapid Characterization

scholarly journals Synthesis and Characterization of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Houda Marouani ◽  
Salem Slayyem Al-Deyab ◽  
Mohamed Rzaigui
Keyword(s):  
Hydrogen Bonds ◽  
Electrostatic Interactions ◽  
Three Dimensional ◽  
Spectroscopic Studies ◽  
Monoclinic System ◽  
Dimensional Network ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Ir Spectroscopic

Single crystals of [2-CH3CH2C6H4NH3]6P6O18⋅4H2O are synthesized in aqueous solution by the interaction of cyclohexaphosphoric acid and 2-ethylaniline. This compound crystallizes in the monoclinic system with P21/c space group the unit cell dimensions are: a=16.220(4) Å, b=10.220(5) Å, c=20.328(4) Å, β=113.24(3)∘, Z=2, and V=3096.5(18) Å3. The atomic arrangement can be described by layers formed by cyclohexaphosphate anions P6O186− and water molecules connected by hydrogen bonds O–H⋯O. These inorganic layers are developed around bc planes at x=1/2 and are interconnected by the H-bonds created by ammonium groups of organic cations. All the hydrogen bonds, the van der Waals contacts and electrostatic interactions between the different entities give rise to a three-dimensional network in the structure and add stability to this compound. The thermal behaviour and the IR spectroscopic studies of this new cyclohexaphosphate are discussed.

scholarly journals Self-assembly of nucleopeptides to interact with DNAs

2017 ◽  
Vol 7 (6) ◽  
pp. 20160116 ◽  
Author(s):  
Xuewen Du ◽  
Jie Zhou ◽  
Xinming Li ◽  
Bing Xu
Keyword(s):  
Hydrogen Bonds ◽  
Plasmid Dna ◽  
Self Assembly ◽  
Unique Property ◽  
The Self ◽  
Proteinase K ◽  
Rational Approach ◽  
Proteolytic Resistance ◽  
Soft Biomaterials

As a novel class of biomaterials, nucleopeptides, via the conjugation of nucleobases and peptides, usually self-assemble to form nanofibres driven mainly by hydrogen bonds. Containing nucleobase(s), nucleopeptides have a unique property—interacting with nucleic acids. Here we report the design and characterization of nucleopeptides that self-assemble in water and are able to interact with single-stranded DNAs (ssDNAs). Containing nucleobases on their side chains, these nucleopeptides bind with the ssDNAs, and the ssDNAs reciprocally affect the self-assembly of nucleopeptides. In addition, the interactions between nucleopeptides and ssDNAs also decrease their proteolytic resistance against proteinase K, which further demonstrates the binding with ssDNAs. The nucleopeptides also interact with plasmid DNA and deliver hairpin DNA into cells. This work illustrates a new and rational approach to create soft biomaterials by the integration of nucleobases and peptides to bind with DNA, which may lead to the development of nucleopeptides for controlling DNA in cells.

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