نتایج جستجو برای: intermolecular interactions

تعداد نتایج: 394616  

S Rahmanian Sh Hosseini Hashemi,

The impetus of this study is to investigate the chaotic behavior of a size-dependent nano-beam with double-sided electrostatic actuation, incorporating surface energy effect and intermolecular interactions. The geometrically nonlinear beam model is based on Euler-Bernoulli beam assumption. The influence of the small-scale and the surface energy effect are modeled by implementing the consistent ...

Journal: :The journal of physical chemistry. B 2017
Yong-Lei Wang Aatto Laaksonen Michael D Fayer

Intermolecular features like hydrogen bonding and π-type interactions play pivotal roles in stabilizing molecular structures in ionic liquids with planar rings and hydrogen-bond donors and acceptors. However, the delicate interplay among these interactions is complicated and depends on specific ion types. In this work, ab initio molecular dynamics simulations were performed to reveal competitiv...

Journal: :Symmetry 2023

Liquid crystals are aggregates of individual molecules due to moderate intermolecular interactions, which roughly divided into lyotropic liquid and thermotropic [...]

Journal: :Chemical communications 2013
Aniket Datar Kaushik Balakrishnan Ling Zang

A water soluble perylene diimide molecule has been fabricated into nanofibers via a pH triggered hydrogelation route. The one-dimensional self-assembly is dominated by the intermolecular π-π stacking interactions in concert with the hydrogen bonding between the carboxylic acid side chains. The anisotropic electronic and optical properties observed for the nanofibers are consistent with the one-...

Journal: :Physical chemistry chemical physics : PCCP 2009
Rui Guo Frederic Fournier Paul M Donaldson Elizabeth M Gardner Ian R Gould David R Klug

Electrical interactions between molecular vibrations can be non-linear and thereby produce intermolecular coupling even in the absence of a chemical bond. We use this fact to detect the formation of an intermolecular complex using electron-vibration-vibration two-dimensional infrared spectroscopy (EVV 2DIR) and also to determine the distance and angle between the two molecular species.

Journal: :Nucleic acids research 1994
A Mazumder A Engelman R Craigie M Fesen Y Pommier

We report the activities of HIV integrase protein on a novel DNA substrate, consisting of a pair of gapped duplex molecules. Integrase catalyzed an intermolecular disintegration reaction that requires positioning of a pair of the gapped duplexes in a configuration that resembles the intgration intermediate. However, the major reaction resulted from an intramolecular reaction involving a single ...

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...

2009
Eric Salomon Qing Zhang Stephen Barlow Seth R. Marder Antoine Kahn

Scanning tunneling microscopy is used to study the structure of monolayers of tris{2,5-bis(3,5-bistrifluoromethyl-phenyl)-thieno}[3,4-b,h,n]-1,4,5,8,9,12-hexaaza-triphenylene adsorbed on a clean Ag(110) single-crystal surface. The molecules adsorb flat on the surface, forming two-dimensional islands within which intermolecular interactions constrain the molecules to form rows of molecular pairs...

Journal: :ACS nano 2012
In Soo Park Kilho Eom Jongsang Son Woo-Jin Chang Kidong Park Taeyun Kwon Dae Sung Yoon Rashid Bashir Sang Woo Lee

The simultaneous investigation of a large number of events with different types of intermolecular interactions, from nonequilibrium high-force pulling assays to quasi-equilibrium unbinding events in the same environment, can be very important for fully understanding intermolecular bond-rupture mechanisms. Here, we describe a novel dielectrophoretic force spectroscopy technique that utilizes mic...

Journal: :Nanoscale 2014
Minbok Jung Dongbin Shin So-Dam Sohn Soon-Yong Kwon Noejung Park Hyung-Joon Shin

A detailed understanding of interactions between molecules and graphene is one of the key issues for tailoring the properties of graphene-based molecular devices, because the electronic and structural properties of molecular layers on surfaces are determined by intermolecular and molecule-substrate interactions. Here, we present the atomically resolved experimental measurements of the self-asse...

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