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Title: | Enantioselective Discrimination of Histidine by Means of an Achiral Cubane-Bridged Bis-Porphyrin |
Authors: | Grover, Nitika |
Keywords: | Chemistry Molecular structure Molecules Monomers Peptides and proteins Thin films |
Issue Date: | Nov-2021 |
Publisher: | ACS |
Abstract: | A Langmuir film of cubane-bridged bisporphyrin (H2por-cubane-H2por) at the air/water interface was developed and characterized. The floating film was successfully employed for the chiral discrimination between l- and d-histidine. The enantioselective behavior persisted after the deposition of the film on a solid support using the Langmuir–Schaefer method. Distinct absorption and reflection spectra were observed in the presence of l- or d-histidine, revealing that conformational switching was governed by the interaction between H2por-cubane-H2por and the histidine enantiomer. The mechanism of chiral selection was investigated using an ad hoc modified nulling ellipsometer, indicating the anti-conformation was dominant in the presence of l-histidine, whereas the presence of d-histidine promoted the formation of tweezer conformation. |
URI: | https://pubs.acs.org/doi/10.1021/acs.langmuir.1c02377 http://dspace.bits-pilani.ac.in:8080/jspui/xmlui/handle/123456789/15178 |
Appears in Collections: | Department of Chemistry |
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