authors |
Firmino, ADG; Mendes, RF; Ananias, D; Barbosa, JS; Tome, JPC; Paz, FAA |
nationality |
International |
journal |
MOLECULES |
author keywords |
metal-organic framework; crystal structure; photoluminescence |
keywords |
METAL-ORGANIC FRAMEWORKS; CATALYSTS; NETWORKS |
abstract |
In this work, we used the rigid tetrapodal organic linker, [1,1'-biphenyl]-3,3',5,5'-tetrayltetrakis(phosphonic acid) (H(8)btp), for the preparation of two lanthanide-organic framework families of compounds: layered [Ln(7)(H(5)btp)(4)(H(5.5)btp)(2)(H(6)btp)(2)(H2O)(12)]center dot 23.5H(2)O center dot MeOH [where Ln(3+) = Eu3+ (1Eu) and Gd3+ (1Gd)], prepared using microwave-irradiation followed by slow evaporation; 3D [Ln(4)(H(3)btp)(H(4)btp)(H(5)btp)(H2O)(8)]center dot 3H(2)O [where Ln(3+) = Ce3+ (2Ce), Pr3+ (2Pr), and Nd3+ (2Nd)], obtained from conventional hydro(solvo)thermal synthesis. It is shown that in this system, by carefully selecting the synthetic method and the metal centers, one can increase the dimensionality of the materials, also increasing structural robustness (particularly to the release of the various solvent molecules). Compound 1 is composed of 2D layers stacked on top of each other and maintained by weak pi-pi interactions, with each layer formed by discrete 1D organic cylinders stacked in a typical brick-wall-like fashion, with water molecules occupying the free space in-between cylinders. Compound 2, on the other hand, is a 3D structure with small channels filled with crystallization water molecules. A full solid-state characterization of 1 and 2 is presented (FT-IR spectroscopy, SEM microscopy, thermogravimetric studies, powder X-ray diffraction and thermodiffractometry). The photoluminescence of 1Eu was investigated. |
publisher |
MDPI |
isbn |
1420-3049 |
year published |
2020 |
volume |
25 |
issue |
8 |
digital object identifier (doi) |
10.3390/molecules25081835 |
web of science category |
Biochemistry & Molecular Biology; Chemistry, Multidisciplinary |
subject category |
Biochemistry & Molecular Biology; Chemistry |
unique article identifier |
WOS:000534617500031
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
3.267 |
5 year journal impact factor |
3.589 |
category normalized journal impact factor percentile |
56.714 |
dimensions (citation analysis):
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altmetrics (social interaction):
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