Gagliani Francesco, Di Giulio Tiziano, Grecchi Sara, Benincori Tiziana, Arnaboldi Serena, Malitesta Cosimino, Mazzotta Elisabetta
Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, Via Monteroni, 73100 Lecce, Italy.
Dipartimento di Chimica, Università di Milano, Via Golgi 19, 20133 Milano, Italy.
Molecules. 2024 Apr 5;29(7):1632. doi: 10.3390/molecules29071632.
An environmentally friendly and sustainable approach was adopted to produce a molecularly imprinted polymer (MIP) via electropolymerization, with remarkable electrochemical sensing properties, tested in tyrosine (tyr) detection. The 2,2'-bis(2,2'-bithiophene-5-yl)-3,3'-bithianaphtene (BT-T) was chosen as functional monomer and MIP electrosynthesis was carried out via cyclic voltammetry on low-volume (20 μL) screen-printed carbon electrodes (C-SPE) in ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ((BMIM) TFSI). An easy and rapid washing treatment allowed us to obtain the resulting MIP film, directly used for tyr electrochemical detection, carried out amperometrically. The sensor showed a linear response in the concentration range of 15-200 μM, with LOD of 1.04 µM, LOQ of 3.17 μM and good performance in selectivity, stability, and reproducibility. Tyrosine amperometric detection was also carried out in human plasma, resulting in a satisfactory recovery estimation. The work represents the first use of BT-T as a functional monomer for the production of a molecularly imprinted polymer, with a green approach afforded by using a few microliters of a room temperature ionic liquid as an alternative to common organic solvents on screen-printed carbon electrodes, resulting in a valuable system that meets the green chemistry guidelines, which is today an essential criterion in both research and application field.
采用一种环境友好且可持续的方法,通过电聚合制备了一种分子印迹聚合物(MIP),该聚合物具有卓越的电化学传感性能,并用于酪氨酸(tyr)检测测试。选用2,2'-双(2,2'-联噻吩-5-基)-3,3'-联噻萘(BT-T)作为功能单体,在离子液体1-丁基-3-甲基咪唑双(三氟甲基磺酰)亚胺((BMIM)TFSI)中,通过循环伏安法在小体积(20 μL)的丝网印刷碳电极(C-SPE)上进行MIP的电合成。经过简单快速的洗涤处理,得到了所得的MIP膜,该膜直接用于酪氨酸的电化学检测,采用安培法进行。该传感器在15 - 200 μM的浓度范围内呈现线性响应,检测限为1.04 µM,定量限为3.17 μM,并且在选择性、稳定性和重现性方面表现良好。还在人血浆中进行了酪氨酸安培检测,回收率估算结果令人满意。这项工作首次将BT-T用作制备分子印迹聚合物的功能单体,采用了绿色方法,即在丝网印刷碳电极上使用几微升室温离子液体替代常见有机溶剂,从而得到了一个符合绿色化学准则的有价值的系统,而绿色化学准则如今在研究和应用领域都是一项基本标准。