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Infrared spectroscopy, UV photochemi...

Mutunga, Fredrick M.

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Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals./
Author:	Mutunga, Fredrick M.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	129 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.
Contained By:	Dissertation Abstracts International78-03B(E).
Subject:	Physical chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10154305
ISBN:	9781369094138

Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals.
Mutunga, Fredrick M.

Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 129 p.

Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.

Thesis (Ph.D.)--University of Wyoming, 2016.

The in situ UV photolysis of molecules trapped in parahydrogen (pH2) crystals can be means to photolytically generate isolated photofragments that are well suited to infrared spectroscopic studies. This is made possible by the diminished cage effect for the pH2 matrix. However, for large molecules that can dissociate via multiple pathways, little is known about how the pH2 matrix influences the branching among these open pathways. The 193 nm photodissociation studies of CH 3NH2 isolated in pH2 crystals at 1.8 K show a significant difference from that in the gas phase. These studies give insight into the partial caging of the pH2 quantum solid.

ISBN: 9781369094138Subjects--Topical Terms:

1981412
Physical chemistry.

Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals.
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100 1 $a Mutunga, Fredrick M. $3 3281094
245 1 0 $a Infrared spectroscopy, UV photochemistry, and H-atom tunneling reactions of molecules trapped in parahydrogen crystals.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 129 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-03(E), Section: B.
500 $a Adviser: David T. Anderson.
502 $a Thesis (Ph.D.)--University of Wyoming, 2016.
520 $a The in situ UV photolysis of molecules trapped in parahydrogen (pH2) crystals can be means to photolytically generate isolated photofragments that are well suited to infrared spectroscopic studies. This is made possible by the diminished cage effect for the pH2 matrix. However, for large molecules that can dissociate via multiple pathways, little is known about how the pH2 matrix influences the branching among these open pathways. The 193 nm photodissociation studies of CH 3NH2 isolated in pH2 crystals at 1.8 K show a significant difference from that in the gas phase. These studies give insight into the partial caging of the pH2 quantum solid.
520 $a Aside from the photodecomposition of the precursor molecules, the H atoms generated during the in situ photolysis are known to diffuse in the solid via H + H2 → H2 + H tunneling exchange reaction. The tunneling H atom may subsequently react with the precursor molecule with a diffusion limited reaction rate. For the H + N2O reaction, a very strange non-Arrhenius temperature dependence is reported in which the reaction speeds up at temperatures below 2.4 K. This may be a direct evidence of the influence the dopant solvation site has on the H atom tunneling reactions in the impure solid pH2 host.
590 $a School code: 0264.
650 4 $a Physical chemistry. $3 1981412
650 4 $a Molecular chemistry. $3 1071612
650 4 $a Low temperature physics. $3 3173917
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710 2 $a University of Wyoming. $b Chemistry. $3 1680463
773 0 $t Dissertation Abstracts International $g 78-03B(E).
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792 $a 2016
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10154305