نتایج جستجو برای: intermolecular hydrogen bond

تعداد نتایج: 208823  

2011
K. Holmberg

The amino acid-based surfactants contain an amide bond, which may contribute to the selfassembly of the surfactants both at surfaces and in the bulk. In order to assess the importance of this type of intermolecular association, the behavior of sodium lauroyl glycinate and sodium lauroyl sarcosinate were compared. The former surfactant is capable of forming intermolecular hydrogen bonds while th...

دهستانی, مریم , زیدابادی نژاد, لیلا , موسوی فرد, بتول‌السادات , پوراسترابادی, صدیقه ,

Background: The aim of this study was to investigate interaction between vanillin and alpha-, beta- and gamma-cyclodextrin carriers for targeted drug delivery and compare the performance between them using theoretical methods. Methods: All theoretical calculations were performed on a Intel® Core™ i5 Processors computer at Kerman University using Gaussian 09 program package (Gaussian, Inc., Wal...

2010
Muhammad Nadeem Arshad Hafiz Mubashar-ur-Rehman Islam Ullah Khan Muhammad Shafiq Kong Mun Lo

In the title compound, C(11)H(14)N(2)O(5)S, the amide O atom acts as a hydrogen-bond acceptor from a carboxyl-ate O atom and a secondary amino N atom. In addition, one of the sulfonyl O atoms and the carbonyl O atom of the carboxyl group also form hydrogen bonds with the primary amido N atom. These intermolecular hydrogen-bonding inter-actions give rise to a layer structure, with the layers par...

Journal: :Acta crystallographica. Section C, Crystal structure communications 2005
Emerson T da Silva Rodrigo S Ribiero Edson L S Lima James L Wardell Janet M S Skakle John N Low Christopher Glidewell

In the structures of 5-(1-hydroxyethylidene)-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione, C8H10N2O4, (I), 1,3-dimethyl-5-[1-(propylamino)ethylidene]pyrimidine-2,4,6(1H,3H,5H)-trione, C11H17N3O3, (II), and 5-[1-(2,2-dimethoxyethylamino)ethylidene]-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione, C12H19N3O5, (III), there are no direction-specific intermolecular interactions. The molecules in 5-[1...

Journal: :The Journal of chemical physics 2015
J Andersen J Heimdal R Wugt Larsen

The far-infrared absorption spectra have been recorded for hydrogen-bonded complexes of water with ethanol embedded in cryogenic neon matrices at 2.8 K. The partial isotopic H/D-substitution of the ethanol subunit enabled by a dual inlet deposition procedure enables the observation and unambiguous assignment of the intermolecular high-frequency out-of-plane and the low-frequency in-plane donor ...

Journal: :Advanced photonics research 2022

A supramolecular approach for photonic materials based on hydrogen-bonded cholesteric liquid crystals is presented. The modular toolbox of low-molecular-weight hydrogen-bond donors and acceptors provides a simple route toward crystalline with tailor-made thermal properties. Initial studies reveal broad application potential the thin films chemo- thermosensing. chemosensing performance interrupt...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Takahito Ohshiro Yoshio Umezawa

Molecular tips in scanning tunneling microscopy can directly detect intermolecular electron tunneling between sample and tip molecules and reveal the tunneling facilitation through chemical interactions that provide overlap of respective electronic wave functions, that is, hydrogen-bond, metal-coordination-bond, and charge-transfer interactions. Nucleobase molecular tips were prepared by chemic...

Journal: :Physical chemistry chemical physics : PCCP 2017
Daniël J Bakker Arghya Dey Daniel P Tabor Qin Ong Jérôme Mahé Marie-Pierre Gaigeot Edwin L Sibert Anouk M Rijs

Saligenin (2-(hydroxymethyl)phenol) exhibits both strong and weak intramolecular electrostatic interactions. The bonds that result from these interactions compete with intermolecular hydrogen bonds once saligenin binds to one or more water molecules. Infrared (IR) ultraviolet (UV) ion-dip spectroscopy was used to study isolated saligenin-(H2O)n clusters (n = 1-3) in the far- and mid-IR regions ...

2008
B. Thimme Gowda Sabine Foro K. S. Babitha Hartmut Fuess

In the crystal structure of the title compound, C(14)H(15)NO(2)S, the N-H bond is trans to one of the S=O double bonds, similar to what is observed in N-(2-methyl-phen-yl)benzene-sulfonamide and other aryl sulfonamides. The two aromatic rings enclose a dihedral angle of 44.9 (1)°. The mol-ecules are connected by inter-molecular N-H⋯O hydrogen bonds into chains running along the a axis. An inter...

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