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

Sohyun Park, Eunchan Kim, Youngjin Choi, Jiung Jang, Kyungwon Kwak, Minhaeng Cho, Hyo Jae Yoon

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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 (AuTS) 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 °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.

Original languageEnglish
Article numbere202203536
JournalChemistry - A European Journal
Issue number15
Publication statusPublished - 2023 Mar 13

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF‐2019R1A6A1A11044070; NRF‐2019R1A2C2011003; NRF‐2021M3F3A2A03017999 for H.J.Y, and NRF‐2020R1A2C2010675; NRF‐2020R1A5A1019141 for K.K.) and IBS‐R023‐D1 (M.C.). S.P. acknowledges the support of the POSCO TJ Park Doctoral Fellowship.

Publisher Copyright:
© 2022 Wiley-VCH GmbH.


  • contact angle goniometry
  • heat
  • odd-even effects
  • self-assembled monolayers
  • sum-frequency-generation spectroscopy

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry


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