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Construction of (3,6)-connected polyoxometalate-based metal–organic frameworks (POMOFs) from triangular carboxylate and dimerized Zn4-ε-Keggin.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 11/7/2017, Vol. 46 Issue 41, p14286-14292, 7p
- Publication Year :
- 2017
-
Abstract
- Using the methodology of extension of reduced transition metal-grafted ε-Keggin polyoxoanions with two types of terphenyl-based tricarboxylates of H<subscript>3</subscript>L<superscript>1</superscript> (3,5′,3′′-position substitution) and H<subscript>3</subscript>L<superscript>2</superscript> (4,5′,4′′-position substitution) we isolated two (3,6)-connected 3D polyoxometalate-based metal–organic frameworks, [TBA]<subscript>3</subscript>[H<subscript>3</subscript>PMo<subscript>12</subscript>O<subscript>40</subscript>][Zn<subscript>4</subscript>L<superscript>2</superscript>] (1, YZU-105), and [TPA]<subscript>3</subscript>[H<subscript>3</subscript>PMo<subscript>12</subscript>O<subscript>40</subscript>][Zn<subscript>4</subscript>L<superscript>1</superscript>]·0.5H<subscript>2</subscript>O (2, YZU-106) (H<subscript>3</subscript>L<superscript>1</superscript> = [1,1′;3′,1′′-terphenyl]-3,5′,3′′-tricarboxylic acid; H<subscript>3</subscript>L<superscript>2</superscript> = [1,1′;3′,1′′-terphenyl]-4,5′,4′′-tricarboxylic acid; TBA = tetrabutylammonium; TPA = tetrapropylammonium). In both compounds, the building block was the dimerized form of Zn<subscript>4</subscript>-{ε-H<subscript>3</subscript>PMo<subscript>12</subscript>O<subscript>40</subscript>}. Such dimerization left six anchoring points for each dimer and, as a result, a 6-connected node was formed. Compounds 1 and 2 exhibited topologies of (4·8<superscript>5</superscript>)<subscript>3</subscript>(4·8<superscript>2</superscript>)<subscript>6</subscript> and (6<superscript>5</superscript>·10)<subscript>3</subscript>(6<superscript>3</superscript>)<subscript>6</subscript>, respectively. This work illustrates that use of tri-carboxylate substitutions in different positions (3,5′,3′′-position/4,5′,4′′-position) in tripodal terphenyl-based ligands allows different extents of twisting of the peripheral aromatic ring with respect to the central ring, thereby giving rise to different extending directions and symmetries. [ABSTRACT FROM AUTHOR]
- Subjects :
- POLYOXOMETALATES
CARBOXYLATES
KEGGIN anions
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 46
- Issue :
- 41
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 125881969
- Full Text :
- https://doi.org/10.1039/c7dt03452k