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Isomer-specific Ultraviolet Spectroscopy of M- And P-Divinylbenzene

Isomer-specific Ultraviolet Spectroscopy of M- And P-Divinylbenzene

Talitha M Selby, W Leo Meerts, Timothy S Zwier

J Phys Chem A. 2007 May 17;111(19):3697-709.

PMID: 17388367

Abstract:

The ultraviolet spectroscopy of m- and p-divinylbenzene isomers (mDVB and pDVB) was studied by a combination of methods, including resonance-enhanced two-photon ionization (R2PI), laser-induced fluorescence (LIF), UV-UV hole-burning spectroscopy (UVHB), and single vibronic level fluorescence spectroscopy (SVLF). In mDVB, there are three low-energy conformations, cis-cis, cis-trans, and trans-trans whose S1 <-- S0 origins occur at 31,408, 31,856, and 32,164 cm(-1), respectively, as confirmed by UVHB spectroscopy. There are two possible conformations in pDVB, cis and trans. UVHB studies confirm the S1 <-- S0 origin of trans-pDVB occurs at 32,553 cm(-1), and the corresponding cis-pDVB origin is tentatively assigned to a transition at 32 621 cm(-1). SVLF studies were used to determine several of the vinyl torsional levels of the isomers of mDVB and pDVB. A two-dimensional flexible model was used to fit these levels in mDVB to a potential form and determine the barriers to isomerization.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP105066	p-Divinylbenzene		105-06-6	Price

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