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Open AccessArticle

Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface

by Hangil Lee 1 and Hyun Sung Kim 2,*
1
Department of Chemistry, Sookmyung Women’s University, Seoul 04310, Korea
2
Department of Chemistry, Pukyong National University, Busan 48513, Korea
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(4), 1284; https://doi.org/10.3390/app10041284
Received: 17 January 2020 / Revised: 10 February 2020 / Accepted: 11 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Applications of X-ray Photoelectron Spectroscopy (XPS))
The structures and stability levels of leucine (Leu) and tyrosine (Tyr) adsorbed on a Cu(110) surface, at initial levels of coverage (less than 0.25 monolayer), were investigated using reflection–absorption infrared spectroscopy and high-resolution photoemission spectroscopy (HRPES), as well as by performing density functional theory calculations. At an initial coverage, the O–H dissociation bonded structure was indicated from the spectral results to be the most favorable structure for Leu adsorbed on the Cu(110) surface, whereas the O–H dissociated-N dative bonded structure was most favorable for adsorbed Tyr. These models were further supported by the results of experiments, in which the systems were exposed to other molecules and HRPES was used to monitor whether the amine or carboxylic groups of the adsorbed amino acids became reactive. View Full-Text
Keywords: adsorption structure; amino acids; HRPES; RAIRS; DFT adsorption structure; amino acids; HRPES; RAIRS; DFT
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MDPI and ACS Style

Lee, H.; Kim, H.S. Confirmation of Initial Stable Adsorption Structures of Leucine and Tyrosine Adsorbed on a Cu(110) Surface. Appl. Sci. 2020, 10, 1284.

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