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Alkaline reagent-induced structural diversity of four metal–organic frameworks based on a flexible bicarboxylate ligand.
- Source :
- CrystEngComm; 4/7/2016, Vol. 18 Issue 13, p2347-2355, 9p
- Publication Year :
- 2016
-
Abstract
- Four new metal–organic frameworks, namely, [CdNa(bci)(H<subscript>2</subscript>O)<subscript>3</subscript>]<subscript>n</subscript> (1), [CdK(bci)(H<subscript>2</subscript>O)<subscript>3</subscript>]<subscript>n</subscript> (2), [Cd(Hbci)(H<subscript>2</subscript>O)]<subscript>n</subscript> (3) and {[(H<subscript>2</subscript>en)<subscript>0.5</subscript>Cd(bci)]·2H<subscript>2</subscript>O}<subscript>n</subscript> (4) (H<subscript>3</subscript>bci = bis(2-carboxyethyl)isocyanurate, en = ethylenediamine), have been prepared from H<subscript>3</subscript>bci and Cd(NO<subscript>3</subscript>)<subscript>2</subscript> in aqueous solution using different alkaline reagents, namely, NaOH, KOH, triethylamine and ethylenediamine, respectively, which were characterized by single-crystal X-ray diffraction analyses, infrared spectroscopy, elemental analysis and powder X-ray diffraction. Compounds 1 and 2 are 3D heterometallic frameworks, featuring a 3-nodal 3,3,6-connected T5 type topology and a new 3-nodal 3,4,7-connected topology, respectively; complex 3 is a 3D monometallic framework with a uninodal 4-connected cag topology, while compound 4 is a 2D double-layer structure with a 2-nodal 3,6-connected kgd topology, which is extended to form a 3D supramolecular architecture by hydrogen bonds. Moreover, four new coordination modes of the H<subscript>3</subscript>bci ligand were observed in complexes 1–4. The results indicate that the alkaline reagents play a crucial role in the diversity of the structures and coordination modes of the H<subscript>3</subscript>bci ligand. The luminescence properties and thermal stabilities of these compounds were further investigated. Unexpectedly, complex 4 shows strong luminescence emission of guest ethylenediamine molecules. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 18
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 113934799
- Full Text :
- https://doi.org/10.1039/c6ce00170j