نتایج جستجو برای: c70 d42
تعداد نتایج: 894 فیلتر نتایج به سال:
A fundamental chemical question concerning the fullerenes involves their aromatic nature. For many reasons, it is impossible to experimentally obtain anything that is similar to a resonance energy for a fullerene. We must therefore rely on information obtained from magnetic properties. Since fullerenes are borderless polycyclic conjugated systems with internal cavities, it is possible to study ...
Orientational ordering transitions in C70 are studied by constructing a Landau free energy in terms of order parameters describing long-range orientational order. This theory predicts that the transition from the orientationally disordered state into a partially ordered state, where the long axes of the molecules are parallel to one another, is discontinuous with an elastic distortion. Order pa...
Article history: Received 12 June 2012 Available online 13 February 2013 JEL classification: C70 C72
A new series of exTTF hosts has been synthesized for supramolecular binding study of fullerenes C60 and C70. Binding constants for C60 in chlorobenzene, toluene, toluene-CH2Cl2 and CS2 have been calculated for different hosts and a direct structure-affinity relationship has been established. As predicted, receptors with two exTTF moieties (1, 3 and 4) have demonstrated higher binding abilities ...
The electron affinities of C70 derivatives with trifluoromethyl, methyl and cyano groups were studied experimentally and theoretically using low-temperature photoelectron spectroscopy (LT PES) and density functional theory (DFT). The electronic effects of these functional groups were determined and found to be highly dependent on the addition patterns. Substitution of CF3 for CN for the same ad...
Ordered mesoporous carbon as an efficient and reversible adsorbent for the adsorption of fullerenes.
An ordered mesoporous carbon, CMK-3, was synthesized using a mesoporous siliceous material, SBA-15, as the template. CMK-3 was characterized and used for the adsorption of fullerenes C60 and C70. It was found that the adsorption capacity of CMK-3 is 4 times higher than that of activated carbon. The adsorption equilibrium isotherms of C60 and C70 on CMK-3 were studied for both single and binary ...
The encapsulation of the tetracationic palladium metallosquare with four pyrene-bis-imidazolylidene ligands [1]4+ a series organic molecules was studied by Electrospray ionization Travelling Wave Ion-Mobility Mass Spectrometry (ESI TWIM-MS). method allowed to determine Collision Cross Sections (CCSs), which were used assess size changes experienced host upon guest molecules. When fullerenes as ...
Article history: Received 2 March 2015 Available online 10 July 2015 JEL classification: C70 D44 D60 D82
The reason for weight loss at high altitudes is largely unknown. To date, studies have been unable to differentiate between weight loss due to hypobaric hypoxia and that related to increased physical exercise. The aim of our study was to examine the effect of hypobaric hypoxia on body weight at high altitude in obese subjects. We investigated 20 male obese subjects (age 55.7 +/- 4.1 years, BMI ...
Definitions of sequential equilibrium and perfect equilibrium are given in games of imperfect recall. Subtleties regarding the definition are discussed. JEL Classification numbers: C70, D81.
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