The influence of 1-alkyl-3-methyl imidazolium ionic liquids on a series of cobalt-1,4-benzenedicarboxylate metal-organic frameworks

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Ling Xu (Author) Other; Bing Liu (Author) Other; Sheng Xian Liu (Author) Other; Huan Jiao (Author) Other; Baltazar de Castro (Author) FCUP; Luis Cunha Silva (Author) Other

Journal

Title: CrystEngComm

Vol. 16

Pages: 10649-10657

ISSN: 1466-8033

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 15 Citations

Scopus - 0 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-009-ZWB

DOI: 10.1039/c4ce01722f

Abstract (EN): To investigate the influence of ionic liquids on the structures and properties of the complexes, ionothermal synthesis of 1,4-benzenedicarboxylate acid (H2BDC) reacting with Co(NO3)(2) with four different 1-alkyl-3-methylimidazolium bromides produced three layered metal-organic frameworks with the chemical formula [RMI](2)[Co-3(BDC)(3)Br-2], (R = ethyl for 1; n-propyl for 2, and n-butyl for 3; MI = imidazolium) and a 3D architecture [AMI](2)[Co-3(BDC)(4)] (4) (A = amyl). Compounds 1-3 have the same (3,6) skeleton with[RMI](+) cations located in the interlayer space. Compound 4 grows into a 3D architecture based on BDC2- ligands linking similar 2D grids as those in 1-3. The [RMI](+) templates exert their influence on the diagonal sizes of the quadrilateral grids, the interlamellar spacing, and the solvent-accessible cavities through steric hindrance. By comparison of 1-3, the [RMI](+) templates also have an effect on the properties. As the alkyl chains in [RMI](+) increase, the decomposing temperatures increase, emission peaks around 400 nm blue shift, and the cavities of 1-3 decrease. 1-3 exhibit ferromagnetism with similar magnetic parameters, while 4 reveals antiferromagnetism.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9