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Thermoresponse of Odd-Even Effect in n-Alkanethiolate Self-Assembled Monolayers on Gold Substrates

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Title
Thermoresponse of Odd-Even Effect in n-Alkanethiolate Self-Assembled Monolayers on Gold Substrates
Author(s)
Park, Sohyun; Eunchan Kim; Youngjin Choi; Jang, Jiung; Kyungwon Kwak; Minhaeng Cho; Yoon, Hyo Jae
Publication Date
2023-03
Journal
CHEMISTRY-A EUROPEAN JOURNAL, v.29, no.15
Publisher
WILEY-V C H VERLAG GMBH
Abstract
This study examines thermoresponse of odd-even effect in self-assembled monolayers (SAMs) of n-alkanethiolates (SCn, n=3-18) formed on template-stripped gold (Au-TS) using macro- and microscopic analytical techniques, contact angle goniometry (CAG) and vibrational sum frequency generation (VSFG) spectroscopy, respectively. Both CAG and VSFG analyses showed that the odd-even effect in liquid-like SAMs (n=3-9) disappeared upon heating at 50-70 degrees C, indicating that the heating led to increased structural disorder regardless of odd and even carbon numbers. In contrast, the opposite thermoresponse was observed for odd and even SCn molecules in wax- and solid-like SAMs (n=10-18). Namely, temperature-dependent orientational change of terminal CH3 relative to the surface normal was opposite for the odd and even molecules, thereby leading to mitigated odd-even effect. Our work offers important insights into thermoresponse of supramolecular structure in condensed organic matter.
URI
https://pr.ibs.re.kr/handle/8788114/13280
DOI
10.1002/chem.202203536
ISSN
0947-6539
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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