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Facile Construction of Covalent Organic Framework Nanozyme for Colorimetric Detection of Uranium
Small ( IF 13.0 ) Pub Date : 2021-09-27 , DOI: 10.1002/smll.202102944 Li Zhang 1, 2, 3 , Gui-Ping Yang 1 , Sai-Jin Xiao 2 , Quan-Gen Tan 1 , Qiong-Qing Zheng 1 , Ru-Ping Liang 1, 3 , Jian-Ding Qiu 1, 3
Small ( IF 13.0 ) Pub Date : 2021-09-27 , DOI: 10.1002/smll.202102944 Li Zhang 1, 2, 3 , Gui-Ping Yang 1 , Sai-Jin Xiao 2 , Quan-Gen Tan 1 , Qiong-Qing Zheng 1 , Ru-Ping Liang 1, 3 , Jian-Ding Qiu 1, 3
Affiliation
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2D covalent organic frameworks (2D COFs) have been recognized as a novel class of photoactive materials owing to their extended π-electron conjugation and high chemical stabilities. Herein, a new covalent organic framework (Tph-BDP) is facilely synthesized by using a porphyrin derivative and an organic dye BODIPY derivative (5,5-difluoro-2,8-diformyl-1,3,7,9-tetramethyl-10-phenyl-5H-dipyrrolo[1,2-c:2′,1′-f][1,3,2]diazabori-nin-4-ium-5-uide) as monomers for the first time, and their unique photosensitive properties endow them excellent simulated oxidase activity under 635 nm laser irradiation that can catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). Further findings demonstrate that the presence of uranium (UO22+) can coordinate with imines of the oxidation products of TMB, thus modulating the charge transfer process of the colored products accompanied with intensive aggregation and remarkable color fading. This research provides a preparation strategy for COFs with excellent photocatalytic properties and nanozyme activity, and broadens the applications of the simple colorimetric methods for sensitive and selective radionuclide detection.
中文翻译：
用于比色检测铀的共价有机骨架纳米酶的简便构建
二维共价有机骨架（2D COFs）由于其扩展的 π 电子共轭和高化学稳定性而被认为是一类新型的光活性材料。在此，通过使用卟啉衍生物和有机染料 BODIPY 衍生物（5,5-difluoro-2,8-diformyl-1,3,7,9-tetramethyl-10 -phenyl-5 H -dipyrrolo[1,2-c:2',1'-f][1,3,2]diazabori-nin-4-ium-5-uide) 作为单体的第一次，及其独特的光敏特性使其在 635 nm 激光照射下具有出色的模拟氧化酶活性，可催化 3,3',5,5'-四甲基联苯胺 (TMB) 的氧化。进一步的研究结果表明，铀 (UO 2 2+)可以与TMB氧化产物的亚胺配位，从而调节有色产物的电荷转移过程，伴随着强烈的聚集和显着的褪色。该研究为具有优异光催化性能和纳米酶活性的COFs提供了一种制备策略，并拓宽了简单比色法在灵敏和选择性放射性核素检测中的应用。
更新日期：2021-11-04
中文翻译：
用于比色检测铀的共价有机骨架纳米酶的简便构建
二维共价有机骨架（2D COFs）由于其扩展的 π 电子共轭和高化学稳定性而被认为是一类新型的光活性材料。在此，通过使用卟啉衍生物和有机染料 BODIPY 衍生物（5,5-difluoro-2,8-diformyl-1,3,7,9-tetramethyl-10 -phenyl-5 H -dipyrrolo[1,2-c:2',1'-f][1,3,2]diazabori-nin-4-ium-5-uide) 作为单体的第一次，及其独特的光敏特性使其在 635 nm 激光照射下具有出色的模拟氧化酶活性，可催化 3,3',5,5'-四甲基联苯胺 (TMB) 的氧化。进一步的研究结果表明，铀 (UO 2 2+)可以与TMB氧化产物的亚胺配位，从而调节有色产物的电荷转移过程，伴随着强烈的聚集和显着的褪色。该研究为具有优异光催化性能和纳米酶活性的COFs提供了一种制备策略，并拓宽了简单比色法在灵敏和选择性放射性核素检测中的应用。
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