The Dynamics of Large-Amplitude Motion in Energized Molecules

The Dynamics of Large-Amplitude Motion in Energized Molecules PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6

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Book Description
Chemical reactions involve large-amplitude nuclear motion along the reaction coordinate that serves to distinguish reactants from products. Some reactions, such as roaming reactions and reactions proceeding through a loose transition state, involve more than one large-amplitude degree of freedom. Because of the limitation of exact quantum nuclear dynamics to small systems, one must, in general, define the active degrees of freedom and separate them in some way from the other degrees of freedom. In this project, we use large-amplitude motion in bound model systems to investigate the coupling of large-amplitude degrees of freedom to other nuclear degrees of freedom. This approach allows us to use the precision and power of high-resolution molecular spectroscopy to probe the specific coupling mechanisms involved, and to apply the associated theoretical tools. In addition to slit-jet spectra at the University of Akron, the current project period has involved collaboration with Michel Herman and Nathalie Vaeck of the Université Libre de Bruxelles, and with Brant Billinghurst at the Canadian Light Source (CLS).

The Dynamics of Large-Amplitude Motion in Energized Molecules

The Dynamics of Large-Amplitude Motion in Energized Molecules PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6

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Book Description
Chemical reactions involve large-amplitude nuclear motion along the reaction coordinate that serves to distinguish reactants from products. Some reactions, such as roaming reactions and reactions proceeding through a loose transition state, involve more than one large-amplitude degree of freedom. Because of the limitation of exact quantum nuclear dynamics to small systems, one must, in general, define the active degrees of freedom and separate them in some way from the other degrees of freedom. In this project, we use large-amplitude motion in bound model systems to investigate the coupling of large-amplitude degrees of freedom to other nuclear degrees of freedom. This approach allows us to use the precision and power of high-resolution molecular spectroscopy to probe the specific coupling mechanisms involved, and to apply the associated theoretical tools. In addition to slit-jet spectra at the University of Akron, the current project period has involved collaboration with Michel Herman and Nathalie Vaeck of the Université Libre de Bruxelles, and with Brant Billinghurst at the Canadian Light Source (CLS).

Large Amplitude Motion in Molecules I

Large Amplitude Motion in Molecules I PDF Author: Springer
Publisher:
ISBN: 9783662154113
Category :
Languages : en
Pages : 188

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Large Amplitude Motion in Molecules II

Large Amplitude Motion in Molecules II PDF Author: Springer
Publisher:
ISBN: 9783662154212
Category :
Languages : en
Pages : 192

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Large Amplitude Motion in Molecules

Large Amplitude Motion in Molecules PDF Author:
Publisher:
ISBN:
Category : Molecular structure
Languages : en
Pages : 240

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Large Amplitude Motion in Molecules

Large Amplitude Motion in Molecules PDF Author: Lawrence Steven Bernstein
Publisher:
ISBN:
Category :
Languages : en
Pages : 474

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Dynamics of Coupled Large Amplitude Motions from Small Non-rigid Molecules to Conjugated Polymers

Dynamics of Coupled Large Amplitude Motions from Small Non-rigid Molecules to Conjugated Polymers PDF Author: Ram S. Bhatta
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 177

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Book Description
Large amplitude motions (LAMs) such as torsional and inversion motions are present in a variety of molecular systems ranging from small non-rigid molecules to polymers and play a crucial role in nuclear dynamics. This dissertation presents theoretical studies of LAM dynamics present in small molecules and polymers based on the quantum and classical approaches. On the small molecular side, high-level quantum calculations are performed to calculate high quality torsion-inversion potential energy surfaces for CH3XH2 (X=C, N, O). The torsion-inversion coupling is found to be in the range 280 [less than or equal to] V1,3 [less than or equal to] 450 cm−1. Torsion-inversion Hamiltonian is constructed and torsioninversion energy levels as well as spectroscopic parameters are calculated for these molecular species. The frequency calculation at each stationary point of the surface is performed as well as the calculation of the two-dimensional torsion-inversion force constant surface. On the polymer side, nuclear dynamics are studied performing classical molecular dynamics (MD) simulations. The force field required for the MD simulations are derived from ab initio calculations. Both static and dynamical properties of poly(3-hexylthiophene) (P3HT), a promising solar cell material, are calculated. These properties include structural parameters, density, surface tension, glass transition temperature and melting temperature.

Large Amplitude Motion in Molecules I

Large Amplitude Motion in Molecules I PDF Author: Friedrich L. Boschke
Publisher: Springer
ISBN: 9783662154120
Category : Science
Languages : en
Pages : 182

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Large Amplitude Motion in Molecules II

Large Amplitude Motion in Molecules II PDF Author: Kendall N. Houk
Publisher: Springer
ISBN: 9783662154229
Category : Science
Languages : en
Pages : 186

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Large Amplitude Motion in Molecules

Large Amplitude Motion in Molecules PDF Author:
Publisher:
ISBN: 9780387093109
Category : Molecular structure
Languages : en
Pages :

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Chemical Dynamics of Large Amplitude Motion

Chemical Dynamics of Large Amplitude Motion PDF Author: [Anonymus AC08427750]
Publisher:
ISBN:
Category :
Languages : en
Pages : 272

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