Coordination Polymers Based on a Biphenyl Tetraphosphonate Linker: Synthesis Control and Photoluminescence
| Autor: | Filipe A. Almeida Paz, Ricardo F. Mendes, João P. C. Tomé, Ana D. G. Firmino, Duarte Ananias, Jéssica S. Barbosa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Thermogravimetric analysis
crystal structure Materials science Molecular Conformation Organophosphonates Pharmaceutical Science Crystal structure Article Analytical Chemistry law.invention lcsh:QD241-441 chemistry.chemical_compound lcsh:Organic chemistry Coordination Complexes law Spectroscopy Fourier Transform Infrared Drug Discovery Molecule Physical and Theoretical Chemistry Crystallization Biphenyl chemistry.chemical_classification Molecular Structure Organic Chemistry Polymer metal-organic framework Solvent Crystallography chemistry Chemistry (miscellaneous) Molecular Medicine Metal-organic framework photoluminescence Powder Diffraction |
| Zdroj: | Molecules Volume 25 Issue 8 Molecules, Vol 25, Iss 1835, p 1835 (2020) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules25081835 |
| Popis: | In this work, we used the rigid tetrapodal organic linker, [1,1&rsquo biphenyl]-3,3&rsquo 5,5&rsquo tetrayltetrakis(phosphonic acid) (H8btp), for the preparation of two lanthanide&ndash organic framework families of compounds: layered [Ln7(H5btp)4(H5.5btp)2(H6btp)2(H2O)12]∙23.5H2O∙MeOH [where Ln3+ = Eu3+ (1Eu) and Gd3+ (1Gd)], prepared using microwave-irradiation followed by slow evaporation 3D [Ln4(H3btp)(H4btp)(H5btp)(H2O)8]∙3H2O [where Ln3+ = 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 &ndash &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. |
| Databáze: | OpenAIRE |
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