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An H, Luo H, Xu T, Chang S, Chen Y, Zhu Q, Huang Y, Tan H, Li YG. Visible-Light-Driven Oxidation of Amines to Imines in Air Catalyzed by Polyoxometalate-Tris(bipyridine)ruthenium Hybrid Compounds. Inorg Chem 2022; 61:10442-10453. [PMID: 35758283 DOI: 10.1021/acs.inorgchem.2c01243] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of visible-light photocatalysts for the selective oxidative coupling of amines to imines is an area of great interest. Herein, four hybrid compounds based on polyoxometalate anions and tris(bipyridine)ruthenium cations, Ru(bpy)3[M6O19] (M = Mo, W) 1-2, [Ru(bpy)3]2[Mo8O26] 3, [Ru(bpy)3]2[W10O32] 4, are prepared and characterized by X-ray diffraction (single-crystal and powder), elemental analysis, energy-dispersive X-ray spectroscopy (EDS) analysis, infrared (IR) spectroscopy, and solid diffuse reflective spectroscopy. Single-crystal structural analysis indicates that polyoxometalate anions and tris(bipyridine)ruthenium cations interact with each other through extensive hydrogen bonds in these compounds. These hybrid species with strong visible-light-harvesting abilities and suitable photocatalytic energy potentials show excellent photocatalytic activity and selectivity for the oxidation of amines to imines at room temperature in air as an oxidant. Among them, compound 1 with the [Mo6O19]2- anion has the highest catalytic activity, which can swiftly convert >99.0% of benzylamine into N-benzylidenebenzylamine with a selectivity of 98.0% in 25 min illumination by a 10 W 445 nm light-emitting diode (LED). Its turnover frequency reaches 392 h-1, which is not only better than the homogeneous catalyst [Ru(bpy)3]Cl2 but also much superior to those achieved over most of reported heterogeneous catalysts. Moreover, it shows a wide generality for various aromatic amines, accompanied by the advantages of good recyclability and stability. The photocatalytic oxidation mechanism of amines to the corresponding imines over polyoxometalate-based hybrid compounds was fully investigated.
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Affiliation(s)
- Haiyan An
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Huiyun Luo
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Tieqi Xu
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Shenzhen Chang
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Yanhong Chen
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Qingshan Zhu
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Yaohui Huang
- School of Chemical Engineering, Dalian University of Technology, Dalian 116023, P. R. China
| | - Huaqiao Tan
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Yang-Guang Li
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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Martínez-Peña F, Pizarro AM. Control of Reversible Activation Dynamics of [Ru{η 6 :κ 1 -C 6 H 5 (C 6 H 4 )NH 2 }(XY)] n+ and the Effect of Chelating-Ligand Variation. Chemistry 2017; 23:16231-16241. [PMID: 28734001 DOI: 10.1002/chem.201701681] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Indexed: 02/03/2023]
Abstract
The potential use of organoruthenium complexes as anticancer drugs is well known. Herein, a family of activatable tethered ruthenium(II) arene complexes of general formula [Ru{η6 :κ1 -C6 H5 (C6 H4 )NH2 }(XY)]n+ (closed tether ring) bearing different chelating XY ligands (XY=aliphatic diamine, phenylenediamine, oxalato, bis(phosphino)ethane) is reported. The activation of these complexes (closed- to open-tether conversion) occurs in methanol and DMSO at different rates and to different reaction extents at equilibrium. Most importantly, RuII -complex activation (cleavage of the Ru-Ntether bond) occurs in aqueous solution at high proton concentration (upon Ntether protonation). The activation dynamics can be modulated by rational variation of the XY chelating ligand. The electron-donating capability and steric hindrance of XY have a direct impact on the reactivity of the Ru-N bond, and XY=N,N'-dimethyl-, N,N'-diethyl-, and N,N,N',N'-tetramethylethylenediamine afford complexes that are more prone to activation. Such activation in acidic media is fully reversible, and proton concentration also governs the deactivation rate, that is, tether-ring closure slows down with decreasing pH. Interaction of a closed-tether complex and its open-tether counterpart with 5'-guanosine monophosphate revealed selectivity of the active (open) complex towards interaction with nucleobases. This work presents ruthenium tether complexes as exceptional pH-dependent switches with potential applications in cancer research.
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Affiliation(s)
| | - Ana M Pizarro
- IMDEA Nanociencia, Faraday 9, Ciudad Universitaria de Cantoblanco, Madrid, 28049, Spain.,Nanobiotecnología (IMDEA-Nanociencia), Unidad Asociada al Centro Nacional de Biotecnología (CSIC), Ciudad Universitaria de Cantoblanco, Madrid, 28049, Spain
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Walsh JJ, Bond AM, Forster RJ, Keyes TE. Hybrid polyoxometalate materials for photo(electro-) chemical applications. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.06.016] [Citation(s) in RCA: 218] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Heussner K, Peuntinger K, Rockstroh N, Rau S, Streb C. Cluster-controlled dimerisation in supramolecular ruthenium photosensitizer–polyoxometalate systems. Dalton Trans 2015; 44:330-7. [DOI: 10.1039/c4dt03017f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal oxide-triggered dimerisation reaction of Ru-photosensitizer complexes is reported which is triggered by hydroxide ions liberated during the re-arrangement of a molybdate cluster.
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Affiliation(s)
- Kirsten Heussner
- Inorganic Chemistry I
- School of Chemistry
- University of Ulm
- Albert-Einstein-Allee 11
- 89081 Ulm
| | - Katrin Peuntinger
- Department of Chemistry and Pharmacy
- Friedrich-Alexander-University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Nils Rockstroh
- Department of Chemistry and Pharmacy
- Friedrich-Alexander-University Erlangen-Nuremberg
- 91058 Erlangen
- Germany
| | - Sven Rau
- Inorganic Chemistry I
- School of Chemistry
- University of Ulm
- Albert-Einstein-Allee 11
- 89081 Ulm
| | - Carsten Streb
- Inorganic Chemistry I
- School of Chemistry
- University of Ulm
- Albert-Einstein-Allee 11
- 89081 Ulm
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Minato T, Suzuki K, Kamata K, Mizuno N. Synthesis of α-Dawson-Type Silicotungstate [α-Si2W18O62]8−and Protonation and Deprotonation Inside the Aperture through Intramolecular Hydrogen Bonds. Chemistry 2014; 20:5946-52. [DOI: 10.1002/chem.201400390] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Indexed: 11/07/2022]
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Azcarate I, Ahmed I, Farha R, Goldmann M, Wang X, Xu H, Hasenknopf B, Lacôte E, Ruhlmann L. Synthesis and characterization of conjugated Dawson-type polyoxometalate-porphyrin copolymers. Dalton Trans 2014; 42:12688-98. [PMID: 23715240 DOI: 10.1039/c3dt50850a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Hybrid polyoxometalate-porphyrin copolymeric films were obtained by the electro-oxidation of zinc octaethylporphyrin (ZnOEP) in the presence of a Dawson type polyoxophosphovanadotungstate bearing two pyridyl groups (POM(py)2). The synthesis of a series of POM(py)2 consisting of [P2W15V3O62](9-) functionalized with diol-amide or triol moieties, as well as the characterization of the copolymers are presented.
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Affiliation(s)
- Iban Azcarate
- UPMC Univ Paris 6, Institut Parisien de Chimie Moléculaire, CNRS UMR 7201, 4 Place Jussieu, 75005 Paris, France
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Porphyrin–polyoxometalate hybrids connected via a Tris-alkoxo linker for the generation of photocurrent. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.02.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Visible light sensitized photocurrent generation from electrostatically assembled thin films of [Ru(bpy)3]2+ and the polyoxometalate γ*-[W18O54(SO4)2]4−: Optimizing performance in a low electrolyte medium. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ahmed I, Farha R, Goldmann M, Ruhlmann L. A molecular photovoltaic system based on Dawson type polyoxometalate and porphyrin formed by layer-by-layer self assembly. Chem Commun (Camb) 2013. [DOI: 10.1039/c2cc37519b] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhu J, Walsh JJ, Bond AM, Keyes TE, Forster RJ. Ruthenium metallopolymer: Dawson polyoxomolybdate α-[Mo18O54(SO4)2]4- adduct films: sensitization for visible photoelectrocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13536-13541. [PMID: 22812386 DOI: 10.1021/la300886s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Thin films of the adduct formed from the electrostatic association of the metallopolymer, [Ru(bpy)(2)(PVP)(10)](2+), and the Dawson polyoxomolybdate α-[Mo(18)O(54)(SO(4))(2)](4-), POMo, have been formed on ITO electrodes using an alternate immersion approach. The Ru/POMo ratio is 4.5:1, which exceeds the 2:1 ratio expected on the basis of the charges of the Ru(2+) and POMo(4-) building blocks. This behavior arises because of the polymeric character of the cation. In the presence of a substrate that has an abstractable proton such as benzyl alcohol, these ruthenium-sensitized polyoxomolybdate films generate significant photocurrents under visible irradiation. Significantly, increasing the surface coverage of the adduct from 1.4 × 10(-10) to 8.1 × 10(-10) mol cm(-2) does not measurably increase the photocurrent observed. Scan-rate-dependent cyclic voltammetry reveals that the rate of homogeneous charge transport through the film is slow, which most likely results in only a fraction of the film thickness being active for photoelectrocatalysis. The photocurrent increases markedly when the driving force for the oxidation of POMo(5-), created by the photoelectrocatalytic oxidation of benzyl alcohol, is increased. This result is consistent with the dynamics of heterogeneous electron transfer being centrally important to the regeneration of the photoelectrocatalyst. A system in which the surface coverage and applied overpotential are optimized produces a photocurrent density of 190 ± 18 nA cm(-2) under 480 ± 5 nm irradiation.
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Affiliation(s)
- Jie Zhu
- School of Chemical Science, Dublin City University, Dublin, Ireland
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Walsh JJ, Zhu J, Zeng Q, Forster RJ, Keyes TE. Self assembled composites of luminescent Ru(ii) metallopolymers and the Dawson polyoxometalate α-[Mo18O54(SO4)2]4−. Dalton Trans 2012; 41:9928-37. [DOI: 10.1039/c2dt30503h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Synthesis, structures and properties of new hybrid solids containing ruthenium complexes and polyoxometalates. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Walsh JJ, Long DL, Cronin L, Bond AM, Forster RJ, Keyes TE. Electronic and photophysical properties of adducts of [Ru(bpy)3]2+ and Dawson-type sulfite polyoxomolybdates α/β-[Mo18O54(SO3)2]4−. Dalton Trans 2011; 40:2038-45. [DOI: 10.1039/c0dt01540g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pazderski L, Pawlak T, Sitkowski J, Kozerski L, Szłyk E. (1)H NMR assignment corrections and (1)H, (13)C, (15)N NMR coordination shifts structural correlations in Fe(II), Ru(II) and Os(II) cationic complexes with 2,2'-bipyridine and 1,10-phenanthroline. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48:450-457. [PMID: 20474023 DOI: 10.1002/mrc.2600] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
(1)H, (13)C and (15)N NMR studies of iron(II), ruthenium(II) and osmium(II) tris-chelated cationic complexes with 2,2'-bipyridine and 1,10-phenanthroline of the general formula [M(LL)(3)](2+) (M = Fe, Ru, Os; LL = bpy, phen) were performed. Inconsistent literature (1)H signal assignments were corrected. Significant shielding of nitrogen-adjacent protons [H(6) in bpy, H(2) in phen] and metal-bonded nitrogens was observed, being enhanced in the series Ru(II) --> Os(II) --> Fe(II) for (1)H, Fe(II) --> Ru(II) --> Os(II) for (15)N and bpy --> phen for both nuclei. The carbons are deshielded, the effect increasing in the order Ru(II) --> Os(II) --> Fe(II).
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Affiliation(s)
- Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland.
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Costa-Coquelard C, Sorgues S, Ruhlmann L. Photocatalysis with Polyoxometalates Associated to Porphyrins under Visible Light: An Application of Charge Transfer in Electrostatic Complexes. J Phys Chem A 2010; 114:6394-400. [DOI: 10.1021/jp101261n] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Claire Costa-Coquelard
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay cedex, France
| | - Sébastien Sorgues
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay cedex, France
| | - Laurent Ruhlmann
- Laboratoire de Chimie Physique, UMR 8000 CNRS, Université Paris-Sud 11, 91405 Orsay cedex, France
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