{"title":"A boronic acid functionalized terbium metal-organic framework for fluorescence detection and adsorption of gallic acid.","authors":"Yulin Wang, Jixuan Chen, Kailian Zhou, Jinting Chen, Jiaqiuzi Zhang, Yongbiao Hua, Jiayao Chen, Huishi Guo, Xiuzhen Qiu","doi":"10.1016/j.saa.2024.125425","DOIUrl":null,"url":null,"abstract":"<p><p>Gallic acid (GA) is widely applied as an antioxidant in foods and pharmaceuticals. In this study, a boronic acid functionalized metal-organic framework (Tb-MOF) is developed for fluorescence detection and adsorption of GA. Tb-MOF is constructed by coordination polymerization of terbium ions (Tb<sup>3+</sup>) with 3,5-dicarboxyphenylboronic acid (BBDC). The resulted Tb-MOF exhibits green fluorescence emission at 546 nm under an excitation of 280 nm. However, the green emission of Tb-MOF decreases in the presence of GA due to the formation of borate esters between phenolic hydroxyl groups of GA and hydroxyl groups of Tb-MOF. Under optimized conditions (40 mmol·L<sup>-1</sup> Tris-HCl buffer solution of pH = 6.2 and reaction time of 25 min), the sensor shows a wide detection range of 5 ∼ 200 μmol·L<sup>-1</sup> with a correlation coefficient (R<sup>2</sup>) of 0.9950. Meanwhile, Tb-MOF shows good selectivity and sensitivity to GA (the limit of detection (LOD) is 0.44 μmol·L<sup>-1</sup>). Additionally, Tb-MOF is used to investigate GA adsorption. The corresponding adsorption data can be suitably described by Langmuir isotherm and pseudo-second-order models with a maximum adsorption capacity of 6.03 mg·g<sup>-1</sup>. The above results demonstrate the potential of prepared Tb-MOF in integrating GA detection and adsorption in water samples.</p>","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"327 ","pages":"125425"},"PeriodicalIF":0.0000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.saa.2024.125425","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/10 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Gallic acid (GA) is widely applied as an antioxidant in foods and pharmaceuticals. In this study, a boronic acid functionalized metal-organic framework (Tb-MOF) is developed for fluorescence detection and adsorption of GA. Tb-MOF is constructed by coordination polymerization of terbium ions (Tb3+) with 3,5-dicarboxyphenylboronic acid (BBDC). The resulted Tb-MOF exhibits green fluorescence emission at 546 nm under an excitation of 280 nm. However, the green emission of Tb-MOF decreases in the presence of GA due to the formation of borate esters between phenolic hydroxyl groups of GA and hydroxyl groups of Tb-MOF. Under optimized conditions (40 mmol·L-1 Tris-HCl buffer solution of pH = 6.2 and reaction time of 25 min), the sensor shows a wide detection range of 5 ∼ 200 μmol·L-1 with a correlation coefficient (R2) of 0.9950. Meanwhile, Tb-MOF shows good selectivity and sensitivity to GA (the limit of detection (LOD) is 0.44 μmol·L-1). Additionally, Tb-MOF is used to investigate GA adsorption. The corresponding adsorption data can be suitably described by Langmuir isotherm and pseudo-second-order models with a maximum adsorption capacity of 6.03 mg·g-1. The above results demonstrate the potential of prepared Tb-MOF in integrating GA detection and adsorption in water samples.