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Issue 12, 2015
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Tuning oxygen-sensing behaviour of a porous coordination framework by a guest fluorophore

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Abstract

Tris(8-hydroxyquinolinato)aluminium (AlQ3), a classic fluorescent molecule insensitive to oxygen, is encapsulated as a guest fluorophore into a highly porous coordination framework [Zn4O(bpz)2(bdc)] (MAF-X10, H2bpz = 3,3′,5,5′-tetramethyl-4,4′-bipyrazole, H2bdc = 1,4-benzenedicarboxylic acid) to obtain a highly luminescent host–guest hybrid material AlQ3@MAF-X10 combining the advantages of excellent fluorescence of AlQ3, high oxygen permeability of MAF-X10, and the resonance energy transfer between AlQ3 and MAF-X10. Photoluminescence studies showed that AlQ3@MAF-X10 exhibits yellowish green fluorescence with a Stokes shift (9606 cm−1) as large as those of phosphorescent noble metal complexes, long lifetime (37.4 ns) and a considerable oxygen permeability (4.4 × 10−9 mol cm−1 s−1 bar−1), giving rise to high oxygen sensitivity (88.5% quenched at 1 bar, i.e., I0/I100 = 8.7, KSV = 7.6 bar−1) with fast response and good reversibility.

Graphical abstract: Tuning oxygen-sensing behaviour of a porous coordination framework by a guest fluorophore

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Publication details

The article was received on 21 Aug 2015, accepted on 25 Sep 2015 and first published on 29 Sep 2015


Article type: Research Article
DOI: 10.1039/C5QI00157A
Citation: Inorg. Chem. Front., 2015,2, 1085-1090
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    Tuning oxygen-sensing behaviour of a porous coordination framework by a guest fluorophore

    R. Lin, H. Zhou, C. He, J. Zhang and X. Chen, Inorg. Chem. Front., 2015, 2, 1085
    DOI: 10.1039/C5QI00157A

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