Microwave Synthesis of a photoluminescent Metal-Organic Framework based on a rigid tetraphosphonate linker.
In: Inorganica Chimica Acta, Jg. 455 (2017-01-31), S. 584-594
academicJournal
Zugriff:
In this manuscript, microwave-assisted synthesis was used to prepare a new organic building block and a Metal-Organic Framework based on this unit. The tetrapodal organic linker [1,1′-biphenyl]-3,3′,5,5′-tetrayltetrakis(phosphonic acid) (H 8 btp) was combined with lanthanide cations affording the isotypical 2D lanthanide-organic frameworks [Ln 4 (H 6 btp) 2 (H 4 btp) 2 (H 8 btp)(H 2 O) 16 ]·12H 2 O [where Ln 3+ = La 3+ ( 1 ), (La 0.9 Eu 0.1 ) 3+ ( 2 ) and (La 0.9 Tb 0.1 ) 3+ ( 3 )]. 1 was isolated as large single-crystals and its crystal structure was solved by single-crystal X-ray diffraction. Phase identification of the Eu 3+ - ( 2 ) and Tb 3+ -based ( 3 ) materials was performed by powder X-ray diffraction. Compound 1 consists of two-dimensional double-deck layers, characterized by an unprecedented tetranodal 2,4,4,4-connected layered network, with total point symbol {4·8 5 } 2 {4 2 ·8 4 }{4 3 ·8 2 ·10} 4 {4} 2 . Supramolecular π–π interactions exist both within and between layers. 1 – 3 were fully characterized in the solid-state by a plethora of techniques [elemental and thermogravimetric analyses, electron microscopy (SEM and EDS), FT-IR spectroscopy and solid-state NMR]. Photoluminescence properties of the optically-active mixed-lanthanide materials 2 and 3 reveal that the employed H 8−x btp −x residues are better suited to sensitize Tb 3+ than Eu 3+ , with the measured lifetimes being of 0.83 ± 0.01 and 0.22 ± 0.01 ms, respectively. [ABSTRACT FROM AUTHOR]
Titel: |
Microwave Synthesis of a photoluminescent Metal-Organic Framework based on a rigid tetraphosphonate linker.
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Autor/in / Beteiligte Person: | Firmino, Ana D.G. ; Mendes, Ricardo F. ; Ananias, Duarte ; Vilela, Sérgio M.F. ; Carlos, Luís D. ; Tomé, João P.C. ; Rocha, João ; Almeida Paz, Filipe A. |
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Zeitschrift: | Inorganica Chimica Acta, Jg. 455 (2017-01-31), S. 584-594 |
Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
ISSN: | 0020-1693 (print) |
DOI: | 10.1016/j.ica.2016.05.029 |
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