Publication: Sonochemical synthesis of microscale Zn(ii)-MOF with dual Lewis basic sites for fluorescent turn-on detection of Al<sup>3+</sup>and methanol with low detection limits
Issued Date
2020-08-07
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ISSN
14779234
14779226
14779226
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2-s2.0-85088849668
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Mahidol University
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SCOPUS
Bibliographic Citation
Dalton Transactions. Vol.49, No.29 (2020), 10240-10249
Suggested Citation
Theanchai Wiwasuku, Jintana Othong, Jaursup Boonmak, Vuthichai Ervithayasuporn, Sujittra Youngme Sonochemical synthesis of microscale Zn(ii)-MOF with dual Lewis basic sites for fluorescent turn-on detection of Al<sup>3+</sup>and methanol with low detection limits. Dalton Transactions. Vol.49, No.29 (2020), 10240-10249. doi:10.1039/d0dt01175d Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/59934
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Title
Sonochemical synthesis of microscale Zn(ii)-MOF with dual Lewis basic sites for fluorescent turn-on detection of Al<sup>3+</sup>and methanol with low detection limits
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Abstract
© 2020 The Royal Society of Chemistry. The effects of synthetic methods, modulator types, the content of the modulator, and reaction time on the size and morphology of a microscale Zn-MOF containing dual Lewis basic amino and carbonyl groups, namely [Zn(NH2-bdc)(4,4′-bpy)] {NH2-H2bdc = 2-amino-1,4-benzenedicarboxylic acid and 4,4′-bpy = 4,4′-bipyridine}, were systemically investigated. Uniform octahedral microparticles of Zn-MOF with an average size of 1.7 μm were obtained within an hour at ambient temperature under ultrasound irradiation using sodium acetate as a modulating agent. Interestingly, Zn-MOF has been demonstrated for the dual-functional fluorescent detection of Al3+ and methanol based on a fluorescent turn-on strategy. Very low detection limits (LODs) for Al3+ and methanol were achieved using microcrystalline Zn-MOF and reached 30 nM and 0.7% (v/v), respectively. In comparison to the larger size of the polycrystalline Zn-MOF, the microparticles obtained from the ultrasonic route exhibited an improvement in the detection sensitivity. The dual uncoordinated Lewis basic sites play an important role in the sensitivity and selectivity of the detection. Additionally, the fluorogenic change in the sensing process can be observed by the naked eye under UV-light, allowing preliminary on-field screening. This journal is