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Ren J, Wang B, Yin HQ, Zhang P, Wang XH, Quan Y, Yao S, Lu TB, Zhang ZM. Single Dispersion of Fe(H 2O) 2-Based Polyoxometalate on Polymeric Carbon Nitride for Biomimetic CH 4 Photooxidation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403101. [PMID: 38771974 DOI: 10.1002/adma.202403101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/24/2024] [Indexed: 05/23/2024]
Abstract
Direct methane conversion to value-added oxygenates under mild conditions with in-depth mechanism investigation has attracted wide interest. Inspired by methane monooxygenase, the K9Na2Fe(H2O)2{[γ-SiW9O34Fe(H2O)]}2·25H2O polyoxometalate (Fe-POM) with well-defined Fe(H2O)2 sites is synthesized to clarify the key role of Fe species and their microenvironment toward CH4 photooxidation. The Fe-POM can efficiently drive the conversion of CH4 to HCOOH with a yield of 1570.0 µmol gPOM -1 and 95.8% selectivity at ambient conditions, much superior to that of [Fe(H2O)SiW11O39]5- with Fe(H2O) active site, [Fe2SiW10O38(OH)]2 14- and [P8W48O184Fe16(OH)28(H2O)4]20- with multinuclear Fe-OH-Fe active sites. Single-dispersion of Fe-POM on polymeric carbon nitride (PCN) is facilely achieved to provide single-cluster functionalized PCN with well-defined Fe(H2O)2 site, the HCOOH yield can be improved to 5981.3 µmol gPOM -1. Systemic investigations demonstrate that the (WO)4-Fe(H2O)2 can supply Fe═O active center for C-H activation via forming (WO)4-Fea-Ot···CH4 intermediate, similar to that for CH4 oxidation in the monooxygenase. This work highlights a promising and facile strategy for single dispersion of ≈1-2 Å metal center with precise coordination microenvironment by uniformly anchoring nanoscale molecular clusters, which provides a well-defined model for in-depth mechanism research.
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Affiliation(s)
- Jing Ren
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Baifan Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Hua-Qing Yin
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Peng Zhang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Xin-Hui Wang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Yangjian Quan
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, 999077, China
| | - Shuang Yao
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Tong-Bu Lu
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
| | - Zhi-Ming Zhang
- Institute for New Energy Materials and Low Carbon Technologies, School of Materials Science & Engineering, Tianjin University of Technology, 391 West Binshui Road, Tianjin, 300384, China
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Yu S, Ying J, Tian A, Yang M, Wang X. Photo-, Thermo-, Electrochromic, Erasable Inkless Printing, Ions Detection, and UV Detector Properties of Viologen Compounds Based on Homomolybdate/Keggin POMs. Inorg Chem 2023; 62:21336-21342. [PMID: 38084727 DOI: 10.1021/acs.inorgchem.3c03413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Three POMs-based viologen compounds with different structures were successfully constructed under solvothermal and hydrothermal conditions, [Cu(1,4-cby)2(H2O)0.5(β-Mo8O26)0.5]·C3H7NO·3H2O (1), [H2(1,4-cby)2]·(β-Mo8O26) (2) (1,4-cby·Cl = 1-(4-carboxybenzyl)-4,4'-bipyridine chloride), [H2(1,4-cbyy)2]·(SiMo12O40) (3) (1,4-cbyy·Cl = 1-(4-cyanobenzyl)-4,4'-bipyridine chloride). Compound 1 is a structure with the number "eight-like" metal-organic chain with Cu as the nodes, and compounds 2 and 3 are fascinating structures connected by hydrogen bonding interactions. More importantly, compounds 1-3 exhibit a good response to both light and electricity and the thermal response of compound 1 was also studied. The reasons for the response of compounds 1-3 to external stimuli were analyzed through methods such as UV-Vis, EPR, and XPS. In addition, the transient photocurrent response results of compounds 1-3 are the same as those obtained from kinetic calculations. Meanwhile, the coated filter paper based on compound 3 has been successfully applied in erasable inkless printing and anti-counterfeiting, the test paper of 3 can also detect metal ions, and the films based on compounds 1-3 are a flexible and portable ultraviolet (UV) detector.
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Affiliation(s)
- Shuang Yu
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, P.R. China
| | - Jun Ying
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, P.R. China
| | - Aixiang Tian
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, P.R. China
| | - Mengle Yang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, P.R. China
| | - Xiuli Wang
- College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, P.R. China
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