Journal
INORGANICA CHIMICA ACTA
Volume 500, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2019.119205
Keywords
Metal-organic frameworks; Composite material; Photoluminescence; Recognition; Water medium
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Funding
- CSIR (India)
- UGC (India)
- IISER Pune
- SERB [EMR/2016/000410]
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Dye encapsulated metal-organic framework (MOF) composites have emerged as one of the promising platforms toward chemical recognition. Herein, a highly potent hydrolytically stable luminescent sensory probe was crafted exhibiting selective fluorescence response for Fe3+ ions in water medium. Encapsulation of a cationic dye inside a porous anionic MOF was successfully achieved via an ion-exchange process. Confinement of dye molecules inside the MOF serving as a crystalline flask prohibits the aggregation-induced quenching of dye molecules thereby manifesting a Dye@MOF luminescent composite material. The Dye@MOF composite shows selective response toward Fe3+ ions with remarkable luminescence quenching even in presence of other metal ions. Additionally, a high K-sv (quenching coefficient) value of 5.5 x 10(4) M-1 and low limit of detection (LOD) of 1.1 ppm was observed for Fe3+ ions.
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