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Seo D, Seong S, Kim H, Oh HS, Lee JH, Kim H, Kim YO, Maeda S, Chikami S, Hayashi T, Noh J. Molecular Self-Assembly and Adsorption Structure of 2,2'-Dipyrimidyl Disulfides on Au(111) Surfaces. Molecules 2024; 29:846. [PMID: 38398598 PMCID: PMC10892263 DOI: 10.3390/molecules29040846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/08/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
The effects of solution concentration and pH on the formation and surface structure of 2-pyrimidinethiolate (2PymS) self-assembled monolayers (SAMs) on Au(111) via the adsorption of 2,2'-dipyrimidyl disulfide (DPymDS) were examined using scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). STM observations revealed that the formation and structural order of 2PymS SAMs were markedly influenced by the solution concentration and pH. 2PymS SAMs formed in a 0.01 mM ethanol solution were mainly composed of a more uniform and ordered phase compared with those formed in 0.001 mM or 1 mM solutions. SAMs formed in a 0.01 mM solution at pH 2 were composed of a fully disordered phase with many irregular and bright aggregates, whereas SAMs formed at pH 7 had small ordered domains and many bright islands. As the solution pH increased from pH 7 to pH 12, the surface morphology of 2PymS SAMs remarkably changed from small ordered domains to large ordered domains, which can be described as a (4√2 × 3)R51° packing structure. XPS measurements clearly showed that the adsorption of DPymDS on Au(111) resulted in the formation of 2PymS (thiolate) SAMs via the cleavage of the disulfide (S-S) bond in DPymDS, and most N atoms in the pyrimidine rings existed in the deprotonated form. The results herein will provide a new insight into the molecular self-assembly behaviors and adsorption structures of DPymDS molecules on Au(111) depending on solution concentration and pH.
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Affiliation(s)
- Dongjin Seo
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Sicheon Seong
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Haeri Kim
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Hyun Su Oh
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Jun Hyeong Lee
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Hongki Kim
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Yeon O Kim
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
| | - Shoichi Maeda
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan; (S.M.); (S.C.)
| | - Shunta Chikami
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan; (S.M.); (S.C.)
| | - Tomohiro Hayashi
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan; (S.M.); (S.C.)
| | - Jaegeun Noh
- Department of Chemistry, Hanyang University, Seoul 04763, Republic of Korea; (D.S.); (S.S.); (H.K.); (H.S.O.); (J.H.L.); (H.K.); (Y.O.K.)
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8503, Japan; (S.M.); (S.C.)
- Research Institute for Convergence of Basic Science, Hanyang University, Seoul 04763, Republic of Korea
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Fan Y, Cen R, Shan P, Redshaw C, Cong H, Xiao X, Ge Q. Supramolecular Assembly of Tetramethylcucurbit[6]uril and 2-Picolylamine. ACS OMEGA 2023; 8:9919-9924. [PMID: 36969427 PMCID: PMC10034995 DOI: 10.1021/acsomega.2c06989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
The supramolecular assembly of symmetrical tetramethylcucurbit[6]uril (TMeQ[6]) and 2-picolylamine (AMPy) has been investigated via various techniques, including ultraviolet-visible (UV-vis) and nuclear magnetic resonance spectroscopy, isothermal titration calorimetry (ITC), and X-ray crystallography. The results indicated that TMeQ[6] could encapsulate the AMPy guest molecule to form a stable inclusion complex. The rotational restriction of the guest in the cavity of TMeQ[6] resulted in a large negative value of entropy. The X-ray crystal structure of the 1:1 inclusion complex between TMeQ[6] and AMPy revealed that AMPy exists in the elliptical cavity of TMeQ[6].
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Affiliation(s)
- Ying Fan
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Ran Cen
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Peihui Shan
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Carl Redshaw
- Department
of Chemistry, University of Hull, Hull HU6 7RX, U.K.
| | - Hang Cong
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
- Enterprise
Technology Center of Guizhou Province, Guizhou
University, Guiyang 550025, China
| | - Xin Xiao
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Qingmei Ge
- Key
Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou
Province, Guizhou University, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
- Enterprise
Technology Center of Guizhou Province, Guizhou
University, Guiyang 550025, China
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Al-Otaibi JS, Mary YS, Mary YS, Krátký M, Vinsova J, Gamberini MC. DFT, TD-DFT and SERS analysis of a bioactive benzohydrazide’s adsorption in silver hydrosols at various concentrations. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Shen J, Liu G, Zhang W, Shi W, Zhou Y, Yu Z, Mei Q, Zhang L, Huang W. Design and Detection of Cyanide Raman Tag pH-Responsive SERS Probes. BIOSENSORS 2022; 13:21. [PMID: 36671856 PMCID: PMC9855686 DOI: 10.3390/bios13010021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
As one of the most important parameters of biochemical analysis and detection, the pH value plays a very important role in cell function, food preservation and production, soil and water sources, and other applications. This makes it increasingly important to explore pH detection methods in depth. In this paper, a pH-responsive SERS probe based on the cyano Raman Tag was designed to realize pH sensing detection through the influence of the pH value of analytes on the displacement of the cyano Raman peak in the SERS probe. This cyano Raman tag exhibited not only excellent sensitivity in the liner range of pH 3.0-9.0 with a limit of detection (LOD) of pH 0.33, but also the anti-interference performance and stability (the relative standard deviation (RSD) was calculated to be 6.68%, n = 5). These results indicated that this pH SERS probe with the Raman cyano tag can provide new research ideas for future biological detection, bioimaging, and environmental detection.
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Affiliation(s)
- Jingjing Shen
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Guan Liu
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Wen Zhang
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Wenwen Shi
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Yang Zhou
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Zejie Yu
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Qunbo Mei
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Lei Zhang
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Wei Huang
- Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Road, Nanjing 210023, China
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, China
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Sang H, Mao C, Wu Y, Wei Y. Study on the Effect of Gamma-Ray Irradiation on the Adsorption of 99Tc and Re by a Silica-Based Pyridine Resin. TOXICS 2022; 10:638. [PMID: 36355930 PMCID: PMC9696359 DOI: 10.3390/toxics10110638] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/17/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
A silica-based anion exchange resin was synthesized and used to remove 99Tc from real radioactive liquid waste. The adsorbent had a uniform particle size and exhibited good thermal stability up to 100 °C, which is promising for large-scale column experiments. In accordance with the chemical similarity with Tc, Re was used as a surrogate in this study. The N 1s high-resolution XPS spectra of the adsorbent before and after the adsorption of Re indicated that the ion exchange reaction was the controlling mechanism in the process. After γ-ray irradiation, the changing trend of the Kd was consistent, which showed that the competitive adsorption of NO3- led to a decrease in Kd. The adsorption capacity for the Re decreased slightly from 35.8 to 31.9 mg/g with the increase in the absorbed dose from 0 to 50 kGy. The separation and recovery of Re and the coexisting ions were achieved by chromatographic separation experiments, and the recovery percentage of Re was 86%. In real radioactive liquid waste, N3/SiO2 exhibited good selectivity toward 99Tc over the coexisting metals, namely, 90Sr, 137Cs, 241Am, and U, and the decontamination efficiency of 99Tc attained 65%.
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