Luminescent metal-organic framework-functionalized graphene oxide nanocomposites and the reversible detection of high explosives
- Authors
- Lee, Ji Ha; Jaworski, Justyn; Jung, Jong Hwa
- Issue Date
- 2013
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NANOSCALE, v.5, no.18, pp.8533 - 8540
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOSCALE
- Volume
- 5
- Number
- 18
- Start Page
- 8533
- End Page
- 8540
- URI
- https://scholarworks.bwise.kr/gnu/handle/sw.gnu/21825
- DOI
- 10.1039/c3nr01439h
- ISSN
- 2040-3364
- Abstract
- Achieving both high specificity and sensitivity are essential for gas phase chemical detection systems. Recent implementation of Metal-Organic Frameworks (MOFs) have shown great success in separation and storage systems for specific gas molecules. By implementing a MOF structure comprised of Zn2+ coordinated trans-stilbene derivatives, a gas responsive material has been created which exhibits a high photoluminescence quantum yield, offering new opportunities for chemical sensors. Here, we reveal a nanocomposite material, assembled from azobenzene functionalized graphene oxide and stilbene-MOF, that is capable of luminescent quenching by explosive gases. This unique system displays selectivity to dinitrotoluene (71% quenching) over trinitrotoluene (20% quenching) with sub ppm sensitivity and response times of less than a minute. We show that this implementation of a graphene-based MOF composite provides a unique strategy in the development of molecularly well-defined materials having rapid, reversible, and gas selective fluorescent quenching capabilities. This opens the way for new advances in the assembly of low density frameworks using isomerization suppressed materials.
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