Hydrogen-Atom Tunneling of 2,5-Dichloro-3,6-dihydroxy-1,4-benzoquinone in a Low-Temperature Argon Matrix Studied by FTIR Spectroscopy

2002 ◽  
Vol 106 (46) ◽  
pp. 11029-11033 ◽  
Author(s):  
Nobuyuki Akai ◽  
Satoshi Kudoh ◽  
Masao Takayanagi ◽  
Munetaka Nakata
Keyword(s):  
Hydrogen Atom ◽  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Argon Matrix

Structural Changes in the Schiff Base Region of Squid Rhodopsin upon Photoisomerization Studied by Low-Temperature FTIR Spectroscopy†

Biochemistry ◽  
2006 ◽  
Vol 45 (9) ◽  
pp. 2845-2851 ◽  
Author(s):  
Toru Ota ◽  
Yuji Furutani ◽  
Akihisa Terakita ◽  
Yoshinori Shichida ◽  
Hideki Kandori
Keyword(s):  
Schiff Base ◽  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Base Region

scholarly journals Atmospheric deuterium fractionation: HCHO and HCDO yields in the CH<sub>2</sub>DO+O<sub>2</sub> reaction

2007 ◽  
Vol 7 (4) ◽  
pp. 10019-10041 ◽  
Author(s):  
E. Nilsson ◽  
M. S. Johnson ◽  
F. Taketani ◽  
Y. Matsumi ◽  
M. D. Hurley ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Ftir Spectroscopy ◽  
Molecular Oxygen ◽  
Molecular Hydrogen ◽  
Branching Ratio ◽  
Hydrogen Atom Transfer ◽  
Photochemical Oxidation ◽  
Oxidation Of Methane ◽  
Methoxy Radical ◽  
Deuterium Enrichment

Abstract. The formation of formaldehyde via hydrogen atom transfer from the methoxy radical to molecular oxygen is a key step in the atmospheric photochemical oxidation of methane, and in the propagation of deuterium from methane to molecular hydrogen. We report the results of the first investigation of the branching ratio for HCHO and HCDO formation in the CH2DO+O2 reaction. Labeled methoxy radicals (CH2DO) were generated in a photochemical reactor by photolysis of CH2DONO. HCHO and HCDO concentrations were measured using FTIR spectroscopy. Significant deuterium enrichment was seen in the formaldehyde product, from which we derive a branching ratio of 88.2±1.1% for HCDO and 11.8±1.1% for HCHO. The implications of this fractionation on the propagation of deuterium in the atmosphere are discussed.

Cis–trans isomerization equilibrium in hydroquinone in low-temperature argon and xenon matrices studied by FTIR spectroscopy

2002 ◽  
Vol 356 (1-2) ◽  
pp. 133-139 ◽  
Author(s):  
Nobuyuki Akai ◽  
Satoshi Kudoh ◽  
Masao Takayanagi ◽  
Munetaka Nakata
Keyword(s):  
Low Temperature ◽  
Ftir Spectroscopy ◽  
Trans Isomerization

Theoretical and Experimental Studies of Enflurane. Infrared Spectra in Solution, in Low-Temperature Argon Matrix and Blue Shifts Resulting from Dimerization

2007 ◽  
Vol 111 (42) ◽  
pp. 12228-12238 ◽  
Author(s):  
Danuta Michalska ◽  
Dariusz C. Bieńko ◽  
Bogusława Czarnik-Matusewicz ◽  
Maria Wierzejewska ◽  
Camille Sandorfy ◽  
...  
Keyword(s):  
Low Temperature ◽  
Infrared Spectra ◽  
Experimental Studies ◽  
Argon Matrix

Hydrogen-atom tunneling through a very high barrier; spontaneous thiol → thione conversion in thiourea isolated in low-temperature Ar, Ne, H2and D2matrices

2018 ◽  
Vol 20 (20) ◽  
pp. 13994-14002 ◽  
Author(s):  
Hanna Rostkowska ◽  
Leszek Lapinski ◽  
Maciej J. Nowak
Keyword(s):  
Hydrogen Atom ◽  
Low Temperature ◽  
Chemical Bond ◽  
Very High

Hydrogen-atom tunneling in thiourea involves breaking of the S–H chemical bond and the formation of a new N–H bond.

Sign in / Sign up

Export Citation Format

Share Document