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Investigating Nanoscale Interactions of Host-Guest Complexes Formed Between CB[7] and Atenolol by Quantum Chemistry
Anca Onaciu1,2, Valentin Toma1, Rareș-Mario Borșa1,2,3,4,5
1Department of NanoBioPhysics, Institute of Medical Research and Life Sciences-MEDFUTURE, "Iuliu Haţieganu" University of Medicine and Pharmacy, Louis Pasteur 4-6, 400349 Cluj-Napoca, Romania.
Abstract:
In addition to the course of over 20 years of cucurbit-7-uril (CB[7]) in the pharmaceutical industry, the present study brings together the most recent observations from the perspective of ultrasensitive Raman spectroscopy and Density Functional Theory (DFT) related to the interaction of this molecule with atenolol (Ate) enantiomers during the formation of these host-guest complexes. Quantum chemistry calculations based on DFT were first used to understand the interaction geometry between CB[7] and Ate. These results were further confirmed by ultrasensitive vibrational spectroscopy. The spectral features associated with each enantiomer in the presence of CB[7] were analyzed by means of SERS, highlighting distinct interaction profiles. These experimental findings validated quantum chemical calculations, offering a comprehensive understanding of the host-guest interactions at the nanoscale level.
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