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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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Thermal characterization of self-assembled monolayers of dialkyl disulfides containing the urea moiety

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Title
Thermal characterization of self-assembled monolayers of dialkyl disulfides containing the urea moiety
Author
Shin, Hyeon SukKim, Jang HoonBin Kim, SeungJung, Young Mee
Issue Date
2007-10
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.23, no.21, pp.10567 - 10572
Abstract
Thermal behaviors of urea-containing dialkyl disulfides 4-(3-octadecylureido)phenyl disulfide (ODPD) and 3-(octadecylureido)ethane disulfide (ODED) and octadecyl disulfide (ODDS) self-assembled monolayers (SAMs) were investigated by infrared reflection−absorption spectroscopy (IRRAS). Among the SAMs, the alkyl chain of ODPD is thermally reversible in the temperature region between 30 and 138 °C, whereas alkyl chains of ODED and ODDS are irreversible. With regard to the thermal stability of alkyl chains, ODED is superior to ODPD and ODDS. It is considered that the good thermal reversibility of the ODPD SAM is due to the rigid phenyl ring and the good thermal stability of the ODED SAM is due to the flexible ethylene linker. Moreover, 2D correlation analysis provides an enhancement of spectral resolution in amide II and CH2 antisymmetric stretching bands and suggests from the comparison of sequences of spectral events of ODPD and ODED SAMs that the last reorientation of the phenyl ring in the ODPD SAM is responsible for the good thermal reversibility.
URI
https://scholarworks.unist.ac.kr/handle/201301/5872
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=35448983875
DOI
10.1021/la7015947
ISSN
0743-7463
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CHM_Journal Papers
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