Hou Yafei, Pei Xiaodan, Wang Yuancheng, Zhang Luyuan, Wei Xiaohui, Mao Hongyan, Zhao Wuduo, Zhang Shusheng, Zhang Wenfen
College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China.
Nanomaterials (Basel). 2022 Jun 28;12(13):2213. doi: 10.3390/nano12132213.
The aromatic structure and the rich nitrogen content of polymers based on covalent triazine-based frameworks (CTF) and their unique hydrophilic-lipophilic-balanced adsorption properties make them promising candidates for an adsorbent that can be used for sample pretreatment. Herein, a new covalent triazine-based framework (CTF-DBF) synthesized by a Friedel−Crafts reaction was used for the determination of the content of nucleotides in commercial infant formula. It was shown that the synthetic materials had an amorphous microporous structure, a BET surface area of up to 595.59 m2/g, and 0.39 nm and 0.54 nm micropores. The versatile adsorption properties of this material were evaluated by quantum chemistry theory calculations and batch adsorption experiments using five nucleotides as probes. The quantum chemistry results demonstrated that CTF-DBF can participate in multiple interactions with nucleotides. All the analyses performed present good linearity with R2 > 0.9993. The detection limits of targets ranged from 0.3 to 0.5 mg/kg, the spiked recoveries were between 85.8 and 105.3% and the relative standard deviations (RSD, n = 6) were between 1.1 and 4.5%. All these results suggest that this versatile CTF-DBF has great potential for sample pretreatment.
基于共价三嗪基框架（CTF）的聚合物的芳香结构、丰富的氮含量及其独特的亲水亲油平衡吸附特性，使其成为有望用于样品预处理的吸附剂候选材料。在此，通过傅克反应合成的一种新型共价三嗪基框架（CTF-DBF）被用于测定市售婴儿配方奶粉中的核苷酸含量。结果表明，合成材料具有无定形微孔结构，BET表面积高达595.59 m2/g，微孔尺寸分别为0.39 nm和0.54 nm。以5种核苷酸为探针，通过量子化学理论计算和批量吸附实验对该材料的通用吸附性能进行了评估。量子化学结果表明，CTF-DBF可与核苷酸发生多种相互作用。所有分析均呈现良好的线性关系，R2>0.9993。目标物的检出限为0.3至0.5 mg/kg，加标回收率在85.8%至105.3%之间，相对标准偏差（RSD，n = 6）在1.1%至4.5%之间。所有这些结果表明，这种通用的CTF-DBF在样品预处理方面具有巨大潜力。
