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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Benzotriazole rhodamine B: effect of adsorption on surface-enhanced resonance Raman scattering

McCabe, A.F. and Graham, D. and McKeown, D. and Smith, W.E. (2005) Benzotriazole rhodamine B: effect of adsorption on surface-enhanced resonance Raman scattering. Journal of Raman Spectroscopy, 36 (1). pp. 45-49. ISSN 0377-0486

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Abstract

Polymer films developed for distance detection, containing dye-coated silver particles for ultra-sensitive analysis using surf ace-enhanced resonance Raman scattering (SERRS), identified the need for effective SERRS labels that interact strongly with the metal surfaces. Many dyes that are currently used for SERRS can be displaced from the surface owing to the relatively weak surface attachment, and therefore they do not adhere strongly enough to the surface for many practical applications, i.e. to withstand incorporation into environments such as paints, resins and polymers. Rhodamine dyes are very effective in SERRS under ideal laboratory conditions, as shown by the detection of single molecules. The synthesis of 19-[4-(benzotriazole-5-ylsulfamoyl)-2-methylphenyl]-6-diethylaminoxanthen-3-ylidene]diethylammonium (benzotriazole rhodamine B, BTRB), which was designed to give much stronger surface adhesion, was evaluated using SERRS in comparison with two commercially available rhodamine dyes, rhodamine 6G and rhodamine B. The increased strength of interaction with the roughened metal surface was shown to increase the versatility of BTRB in terms of the choice of aggregating agent and also the type of sample prepared. Therefore, the modification of rhodamine dyes to incorporate a benzotriazole group widens the range of practical applications for which they are suitable for detection using SERRS.