Molecular Self-Assembly and Adsorption Structure of 2,2′-Dipyrimidyl Disulfides on Au(111) Surfaces
Abstract
:1. Introduction
2. Results and Discussion
2.1. Concentration Effect on the Formation of 2PymS SAMs on Au(111) from DPymDS
2.2. The Formation of 2PymS SAMs on Au(111) from DPymDS at Different pHs
2.3. Surface Structure of Well-Ordered 2PymS SAMs on Au(111)
2.4. S 2p XPS and N 1s Peaks for 2PymS SAMs on Au(111) at Different Solution pHs
3. Experimental
3.1. Synthesis of DPymDS
3.2. Preparation of 2PymS SAMs on Au(111)
3.3. STM and XPS Measurements
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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pH Condition | S 2p Species | Peak (eV) a | S 2p/Au 4f b | S1 + S2/Au 4f b |
---|---|---|---|---|
pH = 2 | S1 | 161.29 | 0.00029 | 0.00225 |
S2 | 162.12 | 0.00196 | ||
S3 | 163.58 | 0.00050 | ||
pH = 7 | S1 | 161.24 | 0.00044 | 0.00215 |
S2 | 162.07 | 0.00171 | ||
S3 | 163.38 | 0.00049 | ||
pH = 12 | S1 | 160.95 | 0.00057 | 0.00289 |
S2 | 162.04 | 0.00232 | ||
S3 | 163.66 | 0.00049 |
pH Condition | N 1s Species | Peak (eV) | N 1s/Au 4f a | (N1 + N2)/Au 4f a |
---|---|---|---|---|
pH = 2 | N1 | 398.74 | 0.00370 | 0.00437 |
N2 | 399.74 | 0.00067 | ||
N3 | 400.51 | 000051 | ||
N4 | 401.52 | 0.00024 | ||
pH = 7 | N1 | 398.84 | 0.00405 | 0.00468 |
N2 | 399.85 | 0.00063 | ||
N3 | 400.56 | 0.00091 | ||
N4 | 401.57 | 0.00044 | ||
pH = 12 | N1 | 398.83 | 0.00420 | 0.00567 |
N2 | 39975 | 0.00147 | ||
N3 | 400.55 | 0.00016 | ||
N4 | 401.38 | 0.00020 |
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Seo, D.; Seong, S.; Kim, H.; Oh, H.S.; Lee, J.H.; Kim, H.; Kim, Y.O.; Maeda, S.; Chikami, S.; Hayashi, T.; et al. Molecular Self-Assembly and Adsorption Structure of 2,2′-Dipyrimidyl Disulfides on Au(111) Surfaces. Molecules 2024, 29, 846. https://doi.org/10.3390/molecules29040846
Seo D, Seong S, Kim H, Oh HS, Lee JH, Kim H, Kim YO, Maeda S, Chikami S, Hayashi T, et al. Molecular Self-Assembly and Adsorption Structure of 2,2′-Dipyrimidyl Disulfides on Au(111) Surfaces. Molecules. 2024; 29(4):846. https://doi.org/10.3390/molecules29040846
Chicago/Turabian StyleSeo, Dongjin, Sicheon Seong, Haeri Kim, Hyun Su Oh, Jun Hyeong Lee, Hongki Kim, Yeon O Kim, Shoichi Maeda, Shunta Chikami, Tomohiro Hayashi, and et al. 2024. "Molecular Self-Assembly and Adsorption Structure of 2,2′-Dipyrimidyl Disulfides on Au(111) Surfaces" Molecules 29, no. 4: 846. https://doi.org/10.3390/molecules29040846