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Refractive-index matching avoids local field corrections and scattering bias in solid-state Na <inf>2</inf>SO <inf>4</inf> ultraviolet Raman cross-section measurements

Wang, L and Asher, SA (2012) Refractive-index matching avoids local field corrections and scattering bias in solid-state Na <inf>2</inf>SO <inf>4</inf> ultraviolet Raman cross-section measurements. Applied Spectroscopy, 66 (2). 157 - 162. ISSN 0003-7028

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Abstract

We report a refractive-index matching method to measure nonabsorbing solid ultraviolet (UV) Raman cross-sections that avoids the local field correction and interface scattering of incident light. We used refractiveindex- matched chloroform as an internal standard to determine the solidstate 995 cm -1Na 2SO 4 244 nm Raman cross-sections. The pure liquid chloroform 668 cm -1 244 nm Raman cross-section was determined by using acetonitrile as an internal standard and by calculating the local field corrections for the observed Raman intensities. Our measured 244 nm UV Raman cross-section of the solid-state 995 cm -1 SO 42- band of 1.97 ±0.07 6 10 -28 cm2/(molc.sr) is about half of its aqueous solution Raman crosssection, indicating interactions between the sulfate species in the solid that decrease the Raman polarizability. © 2012 Society for Applied Spectroscopy.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Wang, L
Asher, SAasher@pitt.eduASHER
Date: 1 February 2012
Date Type: Publication
Journal or Publication Title: Applied Spectroscopy
Volume: 66
Number: 2
Page Range: 157 - 162
DOI or Unique Handle: 10.1366/11-06468
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0003-7028
PubMed ID: 22553775
Date Deposited: 14 Feb 2013 21:57
Last Modified: 27 May 2019 13:55
URI: http://d-scholarship.pitt.edu/id/eprint/17314

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