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Concentration-dependent SERS profile of olanzapine on silver and silver-gold metallic substrates

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Abstract

Using nanosized metal substrates, surface-enhanced Raman scattering (SERS) is a tool for improving the Raman signal of biomolecules. For detection, SERS has gained much popularity and an important role in determining chemical composition. In the present study, SERS spectra of 2-methyl-4-(4-methylpiperazin-1-yl)-10H-thieno[2,3-b][1,5]benzodiazepine (olanzapine) (MPTB) were investigated on silver and silver-gold metal substrates (SERSitive, Warsaw, Poland) at different concentrations. Also, different chemical and electronic properties are investigated using DFT calculations. The ring and other functional modes in SERS change in frequency values with variations in intensity for all concentrations. The molecule is oriented in a tilted manner with respect to Ag and Ag-Au.

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Acknowledgements

This research was funded by the Deanship of Scientific Research at Princess Nourah bint Abdulrahman University through the Fast-track Research Funding Program.

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JSA, MKG, and PA helped in experimental setup, conceptualization, methodology, data curation, writing, validation. YSM and YSM contributed to conceptualization, methodology, data curation, writing, software, validation.

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Correspondence to Y. Sheena Mary.

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Al-Otaibi, J.S., Albrycht, P., Mary, Y.S. et al. Concentration-dependent SERS profile of olanzapine on silver and silver-gold metallic substrates. Chem. Pap. 75, 6059–6072 (2021). https://doi.org/10.1007/s11696-021-01783-9

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  • DOI: https://doi.org/10.1007/s11696-021-01783-9

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