Synthesis, structure and magnetism of a novel CuII4TiIV5 heterometallic cluster

Sheng, Kai; Tian, Xuefei; Jagodič, Marko; Jagličić, Zvonko; Zhang, Na; Liu, Qingyun; Tung, Chen‐Ho; Sun, Di

doi:10.1016/j.cclet.2019.05.050

Cited by 23 publications

(10 citation statements)

References 46 publications

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“…From the perspective of electronic and orbital levels (Figure a), the introduction of Vo makes the excess electrons transfer to the Ti 3d orbital, which lowers the orbital energy level from the conduction band, forming an intermediate state. − The unpaired electrons in the intermediate state are easily excited due to the d–d transition, making the material display excellent activity. − However, as discussed before, the electron-rich surface drives the adsorption of molecules on the surface through electron transfer under dark conditions, , as evidenced by the O 2 – signal detected before the reaction (Figure a). Therefore, the electron transfer mechanism is deduced in Figure a.…”

Section: Resultsmentioning

confidence: 96%

Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites

Sheng

Ren

et al. 2022

ACS Catal.

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The complex structural evolution of catalysts under realistic reaction conditions causes great difficulty in identifying true active sites and further understanding the correlations between the dynamic behavior and the catalytic property. Herein, we developed a set of operando electron paramagnetic resonance (EPR) measurements to investigate the dynamic behavior of true active sites, particularly the atomic surface structures and interfacial processes under reaction conditions. By constructing reduced TiO2 as the catalyst model, supported by the developed operando EPR and multiple in situ characterization results, we confirm the generation of previously unrevealed active sites of photoexcited oxygen vacancies (Vo) and further dissect the formation, rebirth, and evolvement of dynamic Vo at the electronic level. Subsequently, the consistent theoretical and experimental results comprehensively justify the dynamic photoexcited Vo as the true active site directly determining the catalytic performance, subverting the classical perception of predesigned Vo as the active site. The relationship between dynamic active site evolution and catalytic performance during operation enables us to understand the interfacial mechanisms at work and design better catalysis systems.

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Section: Resultsmentioning

confidence: 96%

Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites

Sheng

Ren

et al. 2022

ACS Catal.

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“…Various structures with well-defined sizes and forms have been systematically planned and synthesized, resulting in architectures that not only exhibit intricate structural patterns but also offer a wide range of application possibilities. Coordination-driven self-assembly has been employed to create a variety of metal-containing supramolecules due to its reversible, directed character and a large number of potential metal–ligand pairings. − In order to realize functionality in catalysis, photonics, molecular sensing, and other fields, it is crucial to fabricate heteroleptic/heterometallic supramolecular systems. ,− The formation of discrete heteroleptic/heterometallic systems can result in the emergence of new functions not reported in the individual precursors …”

Section: Introductionmentioning

confidence: 99%

Heteroleptic/Heterometallic Sierpiński Triangle with Room Temperature Fluorescence Emission and Photocatalytic Amine Oxidation Activity

et al. 2023

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As a result of their optical and redox properties, bipyridyl (bpy) and terpyridyl (tpy) ruthenium complexes play vital roles in numerous domains. Herein, the design and synthesis of two bipyridyl and terpyridyl ruthenium(II) building units L1 and L2 are explained. A [Ru(bpy) 3 ] 2+ functionalized triangle S1 and a Sierpinśki triangle S2 were synthesized in almost quantitative yields by the self-assembly of L1 with Zn 2+ ions and by the heteroleptic self-assembly of L1 and L2 with Zn 2+ ions, respectively. The Sierpinśki triangle S2 contains the coordination metals [Ru(bpy) 3 ] 2+ , [Ru(tpy) 2 ] 2+ , and [Zn(tpy) 2 ] 2+ . According to research on the catalytic activity of amine oxidation on supramolecules S1 and S2, the benzylamine substrates were nearly entirely transformed to N-benzylidenebenzylamine derivatives after 1 h under a Xe lamp. Furthermore, the observed ruthenium-containing terpyridyl supramolecule S2 maintains high luminous performance at ambient temperature. This discovery opens up new possibilities for the rational molecular design of terpyridyl ruthenium fluorescent materials and catalytic functional materials.

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“…[1][2][3][4][5][6][7] However, fundamental conditions and minutia, such as, temperature, solvents, eminently the selection of ligands, are posers during the design and synthesis procedures. [8][9][10][11][12][13][14][15][16][17][18][19] To date, neoteric diverse ligands, for example, pyridine carboxylic acids, imidazole carboxylic acids, and vanillin Schiff bases, have been prepared and applied for the synthesis of d-f CPs. [20][21][22][23][24][25][26][27][28][29][30][31] The essential elements of the mentioned ligands are N-and O-donors, which arise from f-block metal ions that prefer O-to N-donors while d-block metal ions tend to coordinate both, respectively.…”

Section: Introductionmentioning

confidence: 99%

A one‐dimensionalCd‐Eucoordination polymer with open‐chain ether Schiff base ligand and 4,4′‐bipyridine: Synthesis, structure, luminescence property, and antioxidation activities

Dong

Jiang

et al. 2021

J Chinese Chemical Soc

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A new Cd-Eu coordination polymer (CP) with open-chain ether Schiff base ligand bis(3-methoxysalicylidene)-3-oxapentane-1,5-diamine (H 2 L) and 4,4 0 -bipyridine (bipy), with composition [CdEuL(bipy)(NO 3 ) 3 ] n , has been synthesized by interfacial diffusion method and further performed structural characterization. The structure analysis revealed that Cd-Eu CP is an infinite onedimensional zigzag coordination polymer formed by CdEuL secondary units through symmetrical coordination bridging bipy. Luminescence property of the Cd-Eu CP in solid state was also studied. It has been found that the emission spectra of the Cd-Eu CP exhibit corresponding Eu(III) ion characteristic emission peaks. Antioxidation activities of the ligand and the Cd-Eu CP were also studied, showing that the antioxidant activities of the Cd-Eu CP were better than that of H 2 L. All provide an irreplaceable reference for the study of the properties of one-dimensional chain d-f coordination polymers. K E Y W O R D S 4,4 0 -bipyridine, antioxidation activities, crystal structure, d-f coordination polymer, luminescence, open-chain ether Schiff base ligand

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Synthesis, structure and magnetism of a novel CuII4TiIV5 heterometallic cluster

Cited by 23 publications

References 46 publications

Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites

Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites

Heteroleptic/Heterometallic Sierpiński Triangle with Room Temperature Fluorescence Emission and Photocatalytic Amine Oxidation Activity

A one‐dimensionalCd‐Eucoordination polymer with open‐chain ether Schiff base ligand and 4,4′‐bipyridine: Synthesis, structure, luminescence property, and antioxidation activities

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