Results 231 to 240 of about 3,944,107 (299)
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Blue shifts vs red shifts in σ-hole bonding
Journal of Molecular Modeling, 2008Sigma-hole bonding is a noncovalent interaction between a region of positive electrostatic potential on the outer surface of a Group V, VI, or VII covalently-bonded atom (a sigma-hole) and a region of negative potential on another molecule, e.g., a lone pair of a Lewis base.
Jane S, Murray +4 more
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Journal of Physical Organic Chemistry, 2004
AbstractBlue‐shifted dihydrogen bonds were predicted to be present in a number of non‐covalent complexes including F3C—H…H—Be—X, F3C—H…H—Mg—X, F3C—H…H4Si, F3Si—H…H—Li, F3Si—H…H—Be—X, F3Si—H…H—Mg—X, and F3Si—H…H4Si (X = H, F, Cl and CH3). Pauli and nuclei–nuclei repulsions between the protonic hydrogen and hydridic hydrogen are proposed as the cause of ...
Yong Feng +5 more
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AbstractBlue‐shifted dihydrogen bonds were predicted to be present in a number of non‐covalent complexes including F3C—H…H—Be—X, F3C—H…H—Mg—X, F3C—H…H4Si, F3Si—H…H—Li, F3Si—H…H—Be—X, F3Si—H…H—Mg—X, and F3Si—H…H4Si (X = H, F, Cl and CH3). Pauli and nuclei–nuclei repulsions between the protonic hydrogen and hydridic hydrogen are proposed as the cause of ...
Yong Feng +5 more
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Materials research bulletin, 2018
We report on the Raman blue shift of layered MoS2 films as well as an anomalous blue shift of the photoluminescence spectra of nanocrystallite MoS2 films grown by pulsed laser deposition.
G. Pradhan, A. Sharma
semanticscholar +1 more source
We report on the Raman blue shift of layered MoS2 films as well as an anomalous blue shift of the photoluminescence spectra of nanocrystallite MoS2 films grown by pulsed laser deposition.
G. Pradhan, A. Sharma
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Proceedings of the 37th ACM International Conference on the Design of Communication, 2019
Communication scholars employ metaphors to illustrate the ways that knowledge is produced in professional contexts. This poster argues that current metaphors casting professional texts in ecological and economical terms deserve reevaluation. To do this, it uses a content analysis of ethnographic notes from "ride-along" sessions and interviews with ...
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Communication scholars employ metaphors to illustrate the ways that knowledge is produced in professional contexts. This poster argues that current metaphors casting professional texts in ecological and economical terms deserve reevaluation. To do this, it uses a content analysis of ethnographic notes from "ride-along" sessions and interviews with ...
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On the Physical Origin of Blue-Shifted Hydrogen Bonds
Journal of the American Chemical Society, 2002For blue-shifted hydrogen-bonded systems, the hydrogen stretching frequency increases rather than decreases on complexation. In computations at various levels of theory, the blue-shift in the archetypical system, F(3)C-H.FH, is reproduced at the Hartree-Fock level, indicating that electron correlation is not the primary cause.
Xiaosong, Li +2 more
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Red and blue shifted hydridic bonds
Journal of Computational Chemistry, 2014By performing MP2/aug‐cc‐pVTZab initiocalculations for a large set of dimer systems possessing a RH hydridic bond involved in diverse types of intermolecular interactions (dihydrogen bonds, hydride halogen bonds, hydride hydrogen bonds, and charge‐assisted hydride hydrogen bonds), we show that this is rather an elongation than a shortening that a ...
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Inhibition of photobleaching and blue shift in quantum dots
Chemical Communications, 2009Photobleaching and spectral diffusion (blue shift) of quantum dots at the solid/liquid interface are suppressed by adding mercaptoethylamine.
Chen, H., Gai, H. W., Yeung, E. S.
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Neutral Blue-Shifting and Blue-Shifted Hydrogen Bonds
2006This is a critical review that, first, covers the most important results in the area of blue-shifting hydrogen bonds including their update list containing more than 80 blue-shifting hydrogen-bonded complexes and, second, attempts to classify them on the equal footing with the classical hydrogen bonds and to partly re-examine their origin by means of ...
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Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics, 2003
The Shibata shift was analyzed in flash irradiated wheat (Triticum aestivum, L., cult. MV17) leaf homogenates in the pressure range of 0.1 to 500 MPa, at temperatures of 20, 30 and 40 degrees C. The kinetics of the blue shift (called Shibata shift in case of intact leaves) was followed by repeated recording of fluorescence emission spectra after ...
László, Smeller +3 more
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The Shibata shift was analyzed in flash irradiated wheat (Triticum aestivum, L., cult. MV17) leaf homogenates in the pressure range of 0.1 to 500 MPa, at temperatures of 20, 30 and 40 degrees C. The kinetics of the blue shift (called Shibata shift in case of intact leaves) was followed by repeated recording of fluorescence emission spectra after ...
László, Smeller +3 more
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The Journal of Physical Chemistry A, 2002
In this paper we put forward the idea that the various improper, blue-shifting hydrogen bond systems discussed in the literature are all of essentially the same nature and occur because of three ne ...
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In this paper we put forward the idea that the various improper, blue-shifting hydrogen bond systems discussed in the literature are all of essentially the same nature and occur because of three ne ...
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