Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.inorgchem.8b02230
Title: Luminescent Metal-Organic Frameworks for the Detection and Discrimination of o-Xylene from Xylene Isomers
Authors: Zhang, Jian 
Wang, Jian 
Long, Sichang 
Peh, Shing Bo 
Dong, Jinqiao 
Wang, Yuxiang 
Karmakar, Avishek 
Yuan, Yi Di
Cheng, Youdong 
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Chemistry, Inorganic & Nuclear
Chemistry
CHEMICAL SENSORS
PHASE ADSORPTION
AQUEOUS-PHASE
SEPARATION
FLUORESCENCE
VAPOR
MOF
METALLOPORPHYRINS
SPECTROSCOPY
RECOGNITION
Issue Date: 5-Nov-2018
Publisher: AMER CHEMICAL SOC
Citation: Zhang, Jian, Wang, Jian, Long, Sichang, Peh, Shing Bo, Dong, Jinqiao, Wang, Yuxiang, Karmakar, Avishek, Yuan, Yi Di, Cheng, Youdong, Zhao, Dan (2018-11-05). Luminescent Metal-Organic Frameworks for the Detection and Discrimination of o-Xylene from Xylene Isomers. INORGANIC CHEMISTRY 57 (21) : 13631-13639. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.inorgchem.8b02230
Abstract: Copyright © 2018 American Chemical Society. Differentiation of xylene isomers remains as one of the most important challenges in the chemical industry, mainly due to the similar molecular sizes and boiling points of the three xylene isomers. Fluorescence-based chemical sensors have attracted wide attention due to their high sensitivity and versatile applications. Here, we report a novel fluorescent metal-organic framework named NUS-40, which is able to selectively detect and discriminate o-xylene from other xylene isomers. Suspension of NUS-40 in o-xylene produces a distinct red shift in the fluorescence emission compared to that in either m-xylene or p-xylene. Moreover, the extent of peak shift is dependent on the concentration of o-xylene in xylene isomer mixtures, and the observed linear correlation between fluorescence intensity and o-xylene concentration is beneficial for quantitative detection. The possible mechanism of such responsive fluorescence behavior was investigated by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, and vapor sorption experiments. In addition, facile metalation of the porphyrin centers with metal ions provides an additional route to fine-tune the sensing properties.
Source Title: INORGANIC CHEMISTRY
URI: https://scholarbank.nus.edu.sg/handle/10635/169723
ISSN: 0020-1669
1520-510X
DOI: 10.1021/acs.inorgchem.8b02230
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