Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 268, Issue -, Pages 88-92Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2018.04.019
Keywords
Metal-organic frameworks; Instability; L-Cysteine; Fluorescence sensing; Naked-eye
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Funding
- Doctoral Scientific Research Foundation of Taiyuan University of Science and Technology [20162012, 20162014]
- National Natural Science Foundation of China [21536001, 21606007]
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Generally, instable metal-organic frameworks (MOFs) were seldom used in many applications compared to stable MOFs. However, due to the huge amount of these MOFs and the diversity of the instability, effective use of instable MOFs is necessary and important. As one of classical MOFs, Cu-BTC was applied in many fields including adsorption, separation and catalysis based on its stability. Different from the previous reports, this work mainly focuses on the special instability of Cu-BTC towards the thiol molecules. In detail, a fluorescent molecule (rhodamine B, RhB) was incorporated into Cu-BTC crystals through in-situ synthesis strategy to construct the new sensor, FthB@Cu-BTC. As expected, based on the collapse of Cu-BTC framework caused by L-Cysteine (L-Cys), RhB@Cu-BTC can sense this thiol-containing amino acid selectively and sensitively with naked eyes. The sensor also exhibits a low detection limit of 0.702 mu mol L-1.
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