Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
J Hazard Mater. 2012 Oct 30;237-238:347-54. doi: 10.1016/j.jhazmat.2012.08.058. Epub 2012 Sep 1.
A novel functional monomer T-IPTS, 3-isocyanatopropyltriethoxysilane (IPTS) bearing thymine (T) bases, was synthesized for imprinting Hg(2+). Then a novel Hg(2+) ionic imprinted polymers (IIPs) based on thymine-Hg(2+)-thymine (T-Hg(2+)-T) interactions, i.e. Hg-IIPs-T, were prepared by sol-gel process for the first time in this work. The Hg-IIPs-T exhibited excellent selectivity towards Hg(2+) over Cd(2+), Zn(2+) Pb(2+), Co(2+), Mn(2+), Mg(2+) and Ca(2+), due to the specific T-Hg(2+)-T interactions with high selectivity and high affinity. Accordingly, Hg-IIPs-T were used as solid-phase extraction (SPE) sorbents for preconcentration of trace Hg(2+) in water samples, and satisfactory recoveries ranging from 95.2 to 116.3% were obtained. Also, under optimized conditions, preconcentration factor and detection limit were achieved of 200 and 0.03 μg L(-1), respectively. The IIPs-T-SPE proved to be a rapid and high-effective cleanup and enrichment method for trace Hg(2+) in water samples. More importantly, these results indicated that devising and synthesizing new functional monomers tailor-made for template would become a general promising way to improve the selectivity and stability of IIPs.
一种新型功能单体 T-IPTS，即 3-异氰酸丙基三乙氧基硅烷（IPTS），带有胸腺嘧啶（T）碱基，被合成用于印迹 Hg(2+)。然后，首次通过溶胶-凝胶法制备了基于胸腺嘧啶-Hg(2+)-胸腺嘧啶（T-Hg(2+)-T）相互作用的新型 Hg(2+)离子印迹聚合物（IIPs），即 Hg-IIPs-T。Hg-IIPs-T 对 Hg(2+)具有出色的选择性，优于 Cd(2+)、Zn(2+)、Pb(2+)、Co(2+)、Mn(2+)、Mg(2+)和 Ca(2+)，这是由于 T-Hg(2+)-T 相互作用具有高选择性和高亲和力。因此，Hg-IIPs-T 被用作固相萃取（SPE）吸附剂，用于预浓缩水样中的痕量 Hg(2+)，回收率在 95.2%至 116.3%之间。此外，在优化条件下，实现了 200 的浓缩因子和 0.03μg/L 的检测限。IIPs-T-SPE 被证明是一种快速高效的水样中痕量 Hg(2+)的净化和富集方法。更重要的是，这些结果表明，设计和合成专门为模板定制的新型功能单体将成为提高 IIPs 选择性和稳定性的通用有前途的方法。
