Journal of Physical Chemistry p. 868 - 876 (1984)
Update date:2022-08-16
Topics:
Buechele, James L.
Weitz, Eric
Lewis, Frederick D.
Efficient and clean isomerization has been observed in the system consisting of the conjugated 2,4- and 1,3-hexadienes following infrared multiphoton excitaton of these species.Variations of both laser fluence and pressure of the added inert gas are seen to significantly effect branching ratios and yields.Where a competition exists between a low activation energy, low preexponential factor pathway and one with a high activation energy, high preexponential factor, an increase in fluence is seen to favor the latter pathway.An estimate of the degree of excitation in the molecule is obtainable from product branching ratios and inert gas quenching behavior.Photoacoustic measurements of energy input coupled with observation of product ratios indicate that the production of multiple products in a single laser pulse is compatible with a sequential isomerization mechanism which takes place in an almost vibrationally adiabatic fashion.Thermal and CW laser studies of hexadiene isomerization have been performed.Thermal studies yield rate constants and ΔH and ΔS for the various isomers.Thermal studies coupled with multiphoton studies have helped establish the isomerization pathway connecting the cis,trans-2,4- and trans-1,3-hexadiene isomers and have confirmed the other isomerization pathway in the system.The pathways for CW cw laser-induced isomerization have been studied.
View MoreChangsha Nutritopper Bio Technology Co.,Ltd.
Contact:+86-731-87803543
Address:East 1st Street, Baima Road, Ningxiang County
Shandong Jincheng Zhonghua Bio-pharmaceutical Co.,Ltd
Contact:+86-533-5415882
Address:Zichuan Economic Development Zone,Zibo City,Shandong Province,China
Shanghai Yuking Water Soluble Material Tech Co., Ltd
Contact:86-21-68286299
Address:4F, 13B, No. 600, South Xinyuan Road 201306, Shanghai, China
Shanghai Dynamic Industrial Co.,Ltd.
website:http://www.shdynamic.com
Contact:86-021 3392 6680
Address:Room 805 Information Tower, No.1403 Minsheng Road, Pudong New Area, Shanghai 200135, P. R. China
Xi'an HO-SHINE Bio-Technology Co., Ltd
Contact:+86 (29) 8248-5435/18292020086
Address:No.6 Shiyuan Road Xian City Shaanxi Province, 710048 China
Doi:10.1021/om5009023
(2014)Doi:10.1021/es9504101
(1996)Doi:10.1016/j.tca.2006.01.007
(2006)Doi:10.1021/om3009525
(2013)Doi:10.1016/S0040-4039(02)02327-4
(2002)Doi:10.1021/acs.jmedchem.5b00988
(2015)