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One-step fabrication of boric-acid-functionalized lanthanide metal organic frameworks as a ratiometric fluorescence sensor for selective recognition of dopamine

Abstract

In this work, lanthanide metal organic frameworks (Eu-MOF) modified by boric acid with one-pot method act as ratiometric fluorescence probe to improve the selectivity of Eu-MOF for the naked eye recognition of dopamine (DA). The Eu-MOF probe combined boric acid property with ratiometric fluorescence technique, which had the characteristics of sensitivity and selectivity. The Eu-MOF probe was prepared by a novel, rapid and simple approach at room temperature with 3,5-dicarboxybenzeneboronic acid (DBA) and Eu3+ ions. The dual emission of Eu-MOF probe as response signal was from both DBA and Eu3+ ion at the single excitation of 275 nm, due to the antenna effect. With the addition of DA, boric acid was used to identify DA by covalently linking with the cis-diol compounds of DA, then the emission at 615 nm decreased gradually and the emission at 363 nm increased gradually, which could be observed by naked eyes from the color changes of the mixture. In addition, the Eu-MOF ratiometric fluorescence probe was used to detection of DA in a concentration range of 0-500 μM under optimum measurement conditions with high selectivity and a low detection limit (0.015 μM). The Eu-MOF ratiometric fluorescence probe can also be used to detect other cis-diol substances, such as catechol and gallic acid. Moreover, the Eu-MOF probe was proved to detect DA in human serum samples successfully. Therefore, the Eu-MOF proposed in this study provided a new method for DA and other similar substances detection.

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Publication details

The article was received on 19 Oct 2018, accepted on 30 Nov 2018 and first published on 03 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05318A
Citation: New J. Chem., 2018, Accepted Manuscript
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    One-step fabrication of boric-acid-functionalized lanthanide metal organic frameworks as a ratiometric fluorescence sensor for selective recognition of dopamine

    Q. Du, P. Wu, P. Dramou, R. Chen and H. He, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05318A

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