Syntheses, structural characterization and electrochemical properties of two rare-earth–isonicotinic-acid containing silicomolybdates

By virtue of combining an in-situ assembly process with a stepwise synthesis in conventional aqueous solution, two series of unique organic-inorganic hybrid heteropolyoxomolybdates were constructed from plenary Keggin germanomolybdates and Cu-Ln heterometallic units and fully characterized: [H INA] H [LnCu(INA) (H O) ] [α-GeMo O ] ⋅52 H O (Ln=La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6); HINA=isonicotinic acid) and (NH )[Cu(PA) ][Cu(PA) Ln(H O) ][α-GeMo O ]⋅10 H O (Ln=Nd (7), Sm (8), Eu (9); HPA=picolinic acid). The most remarkable structural characteristic of compounds 1-6 was that their molecular units were defined by three discrete plenary Keggin [α-GeMo O ] polyoxoanions and two organic-inorganic hybrid heterometallic [LnCu(INA) (H O) ] moieties, whereas compounds 7-9 exhibited a nice-looking 1D chain-like structure that was built from plenary [α-GeMo O ] polyoxoanions, pendent [Cu(PA) ] complexes, and bridging {[Cu(PA) ][Ln(H O) ]} heterometallic groups. Notably, two different pyridine carboxylic acid ligands led to the discrepancy between the two structure types. To the best of our knowledge, compounds 1-9 constitute the first examples of plenary Keggin heterometallic germanomolybdates that include Cu-Ln-organic subunits. Further studies revealed that compounds 3 and 8 exhibited fast adsorption capacity for cationic dyes methylene blue (MB) and rhodamine B (RhB) in water. Moreover, compounds 3 and 8 could quickly and selectively adsorb MB from a mixture of MB/methyl orange (MO) or MB/azophloxine (Apo).

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Ligand‐Controlled Assembly of Heteropolyoxomolybdates from Plenary Keggin Germanomolybdates and Cu–Ln Heterometallic Units

Gong

Pang

et al. 2018

Chemistry An Asian Journal

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A simple approach for the synthesis of bi-functional Fe3O4@WO3−x core–shell nanoparticles with magnetic-microwave to heat responsive properties

Peng

Ouyang

Peng

2017

Inorganic Chemistry Communications

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A new supramolecular compound based on Keggin-type phosphomolybates with mixed-ligand and mixed-valence Cu(I/II): [Cu(I)(phen)2]2{[Cu(II)]2(phen)4PTA}[H3PMo8VIMo4VO40]

Zhang

Chang

Liu

et al. 2019

Inorganic Chemistry Communications

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Syntheses, structural characterization and electrochemical properties of two rare-earth–isonicotinic-acid containing silicomolybdates

Cited by 3 publications

References 39 publications

Ligand‐Controlled Assembly of Heteropolyoxomolybdates from Plenary Keggin Germanomolybdates and Cu–Ln Heterometallic Units

Ligand‐Controlled Assembly of Heteropolyoxomolybdates from Plenary Keggin Germanomolybdates and Cu–Ln Heterometallic Units

A simple approach for the synthesis of bi-functional Fe3O4@WO3−x core–shell nanoparticles with magnetic-microwave to heat responsive properties

A new supramolecular compound based on Keggin-type phosphomolybates with mixed-ligand and mixed-valence Cu(I/II): [Cu(I)(phen)2]2{[Cu(II)]2(phen)4PTA}[H3PMo8VIMo4VO40]

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