Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1302078 | Inorganic Chemistry Communications | 2012 | 4 Pages |
In this paper, we report on a facile and environmentally friendly large-scale synthesis of metal–organic framework (MOF) nanowires by using an ultrasonic method without the introduction of any seeds, polymers, or surfactants. Highly luminescent nanowires of a one-dimensional terbium benzenetricarboxylate MOF, [Tb(1,3,5-btc)(H2O)6]n (1,3,5-btc = benzene-1,3,5-tricarboxylate), with an average diameter of 50 nm and lengths of up to a few micrometers can be easily obtained in a relatively high yield under ultrasound irradiation at 70 °C and under atmospheric pressure. The structure and morphology of the as-synthesized MOF nanowires were characterized by powder X-ray diffractometry (PXRD) and field emmision scanning electron microscopy (FE-SEM), respectively. The [Tb(1,3,5-btc)(H2O)6]n nanowires obtained show strong luminescence emission at 548 and 492 nm, and exhibit high selectivity for sensing of aromatic amines, such as aniline and p-phenylenediamine, in comparison with alkylamines (e.g. methylamine, ethylamine, n-propylamine, n-butylamine and triethylamine). Such a significantly selective luminescence quenching effect of [Tb(1,3,5-btc)(H2O)6]n nanowires for aromatic amines makes the nanostructured Tb-MOF-based sensing materials potential for sensing of aromatic amines in a mixture solution of organoamines.
Graphical abstractHighly luminescent nanowires of a lanthanide metal–organic framework (MOF), [Tb(1,3,5-btc)(H2O)6]n, have been successfully fabricated by an ultrasonic method, and the as-prepared MOF nanowires exhibit significantly high selectivity for sensing of aromatic amines.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Highly luminescent nanowires of a lanthanide metal–organic framework (MOF). ► Rapid synthesis of MOF nanocrystals under ultrasonic irradiation. ► High sensitivity of the [Tb(btc)(H2O)6]n MOF nanowires to aromatic amines.