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Verspeek D, Ahrens S, Wen X, Yang Y, Li YW, Junge K, Beller M. A manganese-based catalyst system for general oxidation of unactivated olefins, alkanes, and alcohols. Org Biomol Chem 2024; 22:2630-2642. [PMID: 38456330 DOI: 10.1039/d4ob00155a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Non-noble metal-based catalyst systems consisting of inexpensive manganese salts, picolinic acid and various heterocycles enable epoxidation of the challenging (terminal) unactivated olefins, selective C-H oxidation of unactivated alkanes, and O-H oxidation of secondary alcohols with aqueous hydrogen peroxide. In the presence of the in situ generated optimal manganese catalyst, epoxides are generated with up to 81% yield from alkenes and ketone products with up to 51% yield from unactivated alkanes. This convenient protocol allows the formation of the desired products under ambient conditions (room temperature, 1 bar) by employing only a slight excess of hydrogen peroxide with 2,3-butadione as a sub-stoichiometric additive.
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Affiliation(s)
- Dennis Verspeek
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Sebastian Ahrens
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Xiandong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Kathrin Junge
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Matthias Beller
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
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Liu R, Li JQ, Liu YY, He X. Structural diversity and luminescence of zinc coordination polymers constructed by flexible ligands. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Gao C, Wang D, Liu Y, Zhang G, Liu C, Said A, Niu H, Wang G, Tung CH, Wang Y. New picolinate-functionalized titanium-oxide clusters: syntheses, structures and photocatalytic H 2 evolution. Dalton Trans 2022; 51:15385-15392. [PMID: 36149342 DOI: 10.1039/d2dt01882a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two nanosized titanium-oxide clusters (TOCs), Ti12(μ2-O)14(μ3-O)4PA16 (1; PA = 2-picolinate) and Ti12(μ2-O)18PA18 (2) were synthesized by using 2-picolinic acid and Ti(OiPr)4 in one-pot reactions. Their structures were determined using single-crystal X-ray diffractometry. Although both have the same core composition of Ti12O18, 1 exhibited superior H2 evolution activity of up to 180 μmol h-1 g-1, which is nearly eight times faster than 2. Mechanism studies revealed that 1 could induce the assembly of 2.3 nm PtNPs into 10-30 nm supra-nanoparticle structures, which contributed to the increased H2 evolution rate.
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Affiliation(s)
- Chang Gao
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Dexin Wang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Yanshu Liu
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Guanyun Zhang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Caiyun Liu
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Amir Said
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Huihui Niu
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Guo Wang
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Yifeng Wang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China. .,State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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Guo YH, Yu YZ, Shen YH, Yang LG, Liu NN, Zhou ZY, Niu YS. "Three-in-One" Structural-Building-Mode-Based Ti 16-Type Titanium Oxo Cluster Entirely Protected by the Ligands Benzoate and Salicylhydroxamate. Inorg Chem 2022; 61:8685-8693. [PMID: 35639458 DOI: 10.1021/acs.inorgchem.2c00327] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Titanium oxo clusters (TOCs) with accurate molecular structures have potential applications in photocatalysis, such as photocatalytic degradation, hydrogen production, and water oxidation. The hydrolytic stability and light absorption ability of TOCs have important impacts on photocatalysis, where the selection of peripheral organic ligands plays a significant role. In this regard, salicylhydroxamic acid (abbreviated as H3L) attracts our attention, acting as a ligand for its multidentate and dye-functional features, which can increase the hydrolytic stability and broaden light absorption for TOCs. Herein, two TOCs were solvothermally synthesized and structurally characterized using H3L, formulated as [Ti8(μ2-O)2(μ3-O)2(OiPr)12(L)4]·2CH3CN (1) and [Ti16(μ2-O)10(μ3-O)4(PhCOO)14(L)6(HL)2]·4CH3CN·2iPrOH (2). Complex 2 was obtained by adding excessive benzoic acid over the reaction system of 1, resulting in enhanced hydrolytic stability via the replacement of all alkoxy ligands by multidentate ligands for protection. Interestingly, for the first time, the "three-in-one" structural building mode with {Ti6} + {Ti4} + {Ti6} by the common subunits in 2 was observed among all reported TOCs. Moreover, complex 2 can strongly absorb visible light reaching up to 700 nm and exhibit obvious activity for the photodegradation of methyl orange.
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Affiliation(s)
- Yu-Hua Guo
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - You-Zhu Yu
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Yan-Hong Shen
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Li-Guo Yang
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Na-Na Liu
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Zhong-Yuan Zhou
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
| | - Yong-Sheng Niu
- Henan Key Laboratory of Subcritical High-Efficiency Extraction, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, P. R. China
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