1
|
Luo X, Ling R, Xing R, Liu Y, Wan J, Li M, Wang C. Improved NH 3 Uptake of a Macromolecule-Metal Complex Constructed with Dual Polymeric Ligands and M(II). ACS APPLIED MATERIALS & INTERFACES 2024; 16:6495-6503. [PMID: 38286763 DOI: 10.1021/acsami.3c16465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
MOFs are considered as efficient NH3 adsorbents for their high capacity but are accompanied by the collapse of MOFs. In this work, macromolecule-metal complexes (MMCs), which could provide metal sites like MOFs, were developed for reversible NH3 uptake with high capacity with the assistance of the polymeric ligands. Based on the tunable structure of MMCs, the role of the polymeric ligands and metallic center was investigated. Thereinto, MMCs-3 with dual polymeric ligands presented higher NH3 adsorption capacity and reversibility of adsorbents compared with MMCs containing a single polymeric ligand (MMCs-1 and MMCs-2). Combined with the NH3 adsorption test, characterization of FT-IR, UV-vis, EPR spectroscopy, NH3-TPD measurement, and the DFT calculations, it was found that the neutral polymeric ligands PVIm contributed to improve the stability of MMCs-3 under a NH3 atmosphere for the tough networks of PVIm-M(II), while the polymeric ligands with a carboxylate anion together with M(II) enhanced the NH3 capacity for the feasible coordination of a carboxylate anion with M(II). The mechanism of NH3 uptake by PVIm-Co-PVBA was proposed that the NH3 was fixed through the coordination with Co(II) along with the departure of PVBA and the following hydrogen bonding interaction with PVBA, while the coordination between PVIm and Co(II) was not destroyed. Thus, MMCs-3 with dual polymeric ligands presented a higher NH3 uptake capacity and stability. Optimally, PVIm-M-PVBA with the metal center of Co(II), Cu(II), and Ni(II) were obtained with a high capacity of 20.8-23.7 NH3 mmol/g at 25 °C and 1 bar and a high selectivity of NH3 over CO2 (54.9-99.9) and N2 (73.0-187.6) through the breakthrough measurement with a gas mixture of 0.2% NH3, 2% CO2, and 99.6% N2 at 25 °C.
Collapse
Affiliation(s)
- Xiaoyan Luo
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Renhui Ling
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Runjia Xing
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Yibang Liu
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Jiahui Wan
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Mingxing Li
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Congmin Wang
- Department of Chemistry, Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou 310027, P. R. China
| |
Collapse
|
3
|
Rodríguez-Fernández CD, Montes-Campos H, López-Lago E, de la Fuente R, Varela LM. Microstructure, dynamics and optical properties of metal-doped imidazolium-based ionic liquids. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
4
|
Spectrophotometric Investigation of Cobalt Chloride Complex Formation in Aqueous Calcium Nitrate–Ammonium Nitrate Melts at T = 328.15 K: Influence of Water Content. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00920-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
5
|
Clarke CJ, Maxwell-Hogg S, Smith EF, Hawker RR, Harper JB, Licence P. Resolving X-ray photoelectron spectra of ionic liquids with difference spectroscopy. Phys Chem Chem Phys 2018; 21:114-123. [PMID: 30519695 DOI: 10.1039/c8cp06701e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray photoelectron spectroscopy (XPS) is a powerful element-specific technique to determine the composition and chemical state of all elements in an involatile sample. However, for elements such as carbon, the wide variety of chemical states produce complex spectra that are difficult to interpret, consequently concealing important information due to the uncertainty in signal identity. Here we report a process whereby chemical modification of carbon structures with electron withdrawing groups can reveal this information, providing accurate, highly refined fitting models far more complex than previously possible. This method is demonstrated with functionalised ionic liquids bearing chlorine or trifluoromethane groups that shift electron density from targeted locations. By comparing the C 1s spectra of non-functional ionic liquids to their functional analogues, a series of difference spectra can be produced to identify exact binding energies of carbon photoemissions, which can be used to improve the C 1s peak fitting of both samples. Importantly, ionic liquids possess ideal chemical and physical properties, which enhance this methodology to enable significant progress in XPS peak fitting and data interpretation.
Collapse
Affiliation(s)
- Coby J Clarke
- School of Chemistry, The University of Nottingham, University Park, Nottingham, UK.
| | | | | | | | | | | |
Collapse
|
6
|
Ge X, Li J, Zhang C, Wang Z, Luo J. Superlubricity of 1-Ethyl-3-methylimidazolium trifluoromethanesulfonate Ionic Liquid Induced by Tribochemical Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5245-5252. [PMID: 29672065 DOI: 10.1021/acs.langmuir.8b00867] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The robust liquid superlubricity of a room-temperature ionic liquid induced by tribochemical reactions is explored in this study. Here, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM]TFS) could realize stable superlubricity (μ < 0.01) with water at the interfaces of Si3N4/SiO2. A superlow and steady friction coefficient of 0.002-0.004 could be achieved under neutral conditions (pH of 6.9 ± 0.1) after 600 s of running-in process. Various factors that could affect superlubricity were explored, including concentration of [EMIM]TFS, sliding speed, applied load, and volume of the lubricant. The results reveal that superlubricity can be achieved with [EMIM]TFS aqueous solution under a broad scope of conditions. The results of surface analysis show that a steady composite tribochemical layer comprising [EMIM]TFS, silica, ammonia-containing compounds, and sulfides was formed by tribochemical reactions between [EMIM]TFS and Si3N4 during the running-in period. The film thickness calculation reveals that the achieved superlubricity is in a mixed lubrication regime that comprises boundary lubrication and thin film lubrication. The superlubricity state is governed by a firm composite tribochemical layer, a molecular adsorption layer (electric double layer of [EMIM]TFS), and a fluid layer. The liquid superlubricity achieved by the ionic liquid is helpful for the development of new ionic liquids with superlubricity characteristics and is of great significance for scientific understanding as well as engineering applications.
Collapse
Affiliation(s)
- Xiangyu Ge
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Jinjin Li
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Chenhui Zhang
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Zhongnan Wang
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Jianbin Luo
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| |
Collapse
|
7
|
Sniekers J, Geysens P, Vander Hoogerstraete T, Van Meervelt L, Fransaer J, Binnemans K. Cobalt(ii) liquid metal salts for high current density electrodeposition of cobalt. Dalton Trans 2018; 47:4975-4986. [PMID: 29557463 DOI: 10.1039/c8dt00283e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cobalt-containing liquid metal salts were synthesized and characterized. Reversible thermochromism was observed and the electrodeposition of cobalt layers with different morphologies was investigated.
Collapse
Affiliation(s)
| | | | | | | | - Jan Fransaer
- KU Leuven
- Department of Metallurgy and Materials Engineering
- B-3001 Heverlee
- Belgium
| | | |
Collapse
|
8
|
Maier F, Niedermaier I, Steinrück HP. Perspective: Chemical reactions in ionic liquids monitored through the gas (vacuum)/liquid interface. J Chem Phys 2017; 146:170901. [DOI: 10.1063/1.4982355] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Maier
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
| | - I. Niedermaier
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
| | - H.-P. Steinrück
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
| |
Collapse
|