Syntheses, characterization and properties of two new dodeca-niobates presenting unprecedented features.

Authors :: Zhang, Ting-Ting
Lin, Po-Han
Yu, Gui-Yang
Zhang, Xiao
Cui, Xiao-Bing
Source :: Dalton Transactions: An International Journal of Inorganic Chemistry; 5/21/2020, Vol. 49 Issue 19, p6495-6503, 9p
Publication Year :: 2020
Abstract: Two new dodeca-niobate materials, K<subscript>3</subscript>[Nb<subscript>2</subscript>O<subscript>2</subscript>][H<subscript>7</subscript>SiNb<subscript>12</subscript>O<subscript>40</subscript>]·16H<subscript>2</subscript>O (1) and [Cu(en)<subscript>2</subscript>]<subscript>9</subscript>[(VNb<subscript>12</subscript>V<subscript>1.69</subscript>Nb<subscript>0.31</subscript>O<subscript>42</subscript>en<subscript>0.31</subscript>)<subscript>2</subscript>]·20.69H<subscript>2</subscript>O (2) (en = ethylenediamine), have been obtained under hydrothermal conditions and characterized by IR, UV-Vis, XRD, and single crystal X-ray diffraction analysis. Single crystal X-ray analysis reveals that compound 1 presents a reasonable bridging layer structure model and that K plays a great role in the three-dimensional structure. Compound 2 is the first capped Keggin POM with organic ligand chelating the capping atom. The photocatalytic hydrogen evolution and styrene epoxidation catalytic properties of the two compounds were also assessed. Additionally, compound 1 is also a good photocatalyst to degrade RhB. [ABSTRACT FROM AUTHOR]

Subjects :: SINGLE crystals
X-ray diffraction
NIOBIUM compounds
EPOXIDATION
STYRENE

Language :: English
ISSN :: 14779226
Volume :: 49
Issue :: 19
Database :: Complementary Index
Journal :: Dalton Transactions: An International Journal of Inorganic Chemistry
Publication Type :: Academic Journal
Accession number :: 143333854
Full Text :: https://doi.org/10.1039/d0dt00953a

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