Ultrafast Infrared Studies of the Role of Spin States in Organometallic Reaction Dynamics

2014 ◽  
Vol 47 (5) ◽  
pp. 1634-1642 ◽  
Author(s):  
Justin P. Lomont ◽  
Son C. Nguyen ◽  
Charles B. Harris
Keyword(s):  
Reaction Dynamics ◽  
Spin States ◽  
Infrared Studies ◽  
Ultrafast Infrared

ChemInform Abstract: Ultrafast Infrared Studies of the Role of Spin States in Organometallic Reaction Dynamics

ChemInform ◽  
2014 ◽  
Vol 45 (26) ◽  
pp. no-no
Author(s):  
Justin P. Lomont ◽  
Son C. Nguyen ◽  
Charles B. Harris
Keyword(s):  
Reaction Dynamics ◽  
Spin States ◽  
Infrared Studies ◽  
Ultrafast Infrared

Ultrafast Infrared Studies of Bond Activation in Organometallic Complexes

1999 ◽  
Vol 32 (7) ◽  
pp. 551-560 ◽  
Author(s):  
Haw Yang ◽  
Kenneth T. Kotz ◽  
Matthew C. Asplund ◽  
Matthew J. Wilkens ◽  
Charles B. Harris
Keyword(s):  
Bond Activation ◽  
Organometallic Complexes ◽  
Infrared Studies ◽  
Ultrafast Infrared

Role of Initial Vibrational and Rotational Reactant Excitation for the Reaction Dynamics of H2(ν0,J0) with Si+(2P)

2004 ◽  
Vol 108 (10) ◽  
pp. 1818-1825 ◽  
Author(s):  
Nihed Chaâbane ◽  
Holger Vach ◽  
Pere Roca i Cabarrocas
Keyword(s):  
Reaction Dynamics

A COMPUTER MODEL OF THE FERROELECTRIC PROPERTIES OF MICROTUBULES

2004 ◽  
Vol 18 (02) ◽  
pp. 253-274 ◽  
Author(s):  
ROBERT D. J. CAMPBELL
Keyword(s):  
Ferroelectric Properties ◽  
Nearest Neighbors ◽  
Crystalline Lattice ◽  
Spin States ◽  
Ising Spin ◽  
Biochemical Studies ◽  
Dipole Ordering ◽  
The Mean ◽  
Long Cylinder

The tubulin dimers of microtubules are arranged in a crystalline lattice which is wrapped to form a long cylinder. Two different arrangements of monomers within the lattice have been postulated: the A-lattice and the B-lattice. Previous studies have assumed that both lattice types are hexagonal with each dimer surrounded by six nearest-neighbors. Based on recent biochemical studies I argue that both lattice types can also be formed with each dimer having four nearest-neighbors. This has important consequences for the overall behavior of the model. It is generally assumed that tubulin dimers possess a mobile electric dipole which can exist in one of two discrete Ising spin states: -1 (down) or +1 (up). The average of all these states within a microtubule is the mean polarization and is a measure of the dipole ordering within the lattice. Microtubule models with six nearest-neighbors behave like models of ferroelectric substances: at low temperatures the lattice is highly ordered with most (if not all) dipoles pointing in the same direction, but as the temperature increases, the degree of ordering decreases due to random thermal flipping of the dipoles. The mean polarization is particularly erratic at physiological temperatures. In contrast, when the microtubule lattice is modeled with four nearest-neighbors, the mean lattice polarization is quite stable and remains close to zero over a wide temperature range that includes 37°C (310K). This raises new questions about the biophysical role of microtubules.

scholarly journals The role of symmetry breaking in the structural trapping of light-induced excited spin states

2017 ◽  
Vol 53 (99) ◽  
pp. 13268-13271 ◽  
Author(s):  
Rafal Kulmaczewski ◽  
Elzbieta Trzop ◽  
Laurence J. Kershaw Cook ◽  
Eric Collet ◽  
Guillaume Chastanet ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Spin State ◽  
Spin States ◽  
Crystallographic Symmetry ◽  
Red Line

Six isostructural compounds show differing agreement with the correlation T(LIESST) = T0 − 0.3T1/2 (red line; LIESST = Light-Induced Excited Spin-State Trapping). This reflects crystallographic symmetry breaking under LIESST conditions, exhibited by one of the compounds but not by two others.

Reaction Dynamics of O(3P) + Propyne: I. Primary Products, Branching Ratios, and Role of Intersystem Crossing from Crossed Molecular Beam Experiments

2016 ◽  
Vol 120 (27) ◽  
pp. 4603-4618 ◽  
Author(s):  
Gianmarco Vanuzzo ◽  
Nadia Balucani ◽  
Francesca Leonori ◽  
Domenico Stranges ◽  
Vaclav Nevrly ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Reaction Dynamics ◽  
Branching Ratios ◽  
Intersystem Crossing ◽  
Primary Products ◽  
Crossed Molecular Beam
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