基于萘酰亚胺功能化的柱[5]芳烃的新型超分子聚合物凝胶用于通过阳离子-π 相互作用检测 Hg 和 I 并可回收去除 Hg 的荧光检测。

A novel supramolecular polymer gel based on naphthalimide functionalized-pillar[5]arene for the fluorescence detection of Hg and I and recyclable removal of Hgvia cation-π interactions.

机构信息

Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.

出版信息

Soft Matter. 2017 Oct 11;13(39):7085-7089. doi: 10.1039/c7sm01447c.

DOI:10.1039/c7sm01447c

PMID:28849853

Abstract

The development of novel materials for the detection and removal of Hg is a very important issue due to the acute toxicity of Hg. Herein, a novel supramolecular polymer P5BD-DPHB has been constructed by the collaboration of a naphthalimide functionalized-pillar[5]arene host (P5BD) and a bis-bromohexane functionalized-pillar[5]arene guest (DPHB). P5BD-DPHB could form a stable supramolecular gel (P5BD-DPHB-G). Interestingly, P5BD-DPHB-G shows selective fluorescent "turn-on" detection for Hgvia cation-π interactions with high selectivity and sensitivity. Furthermore, the Hg coordinated supramolecular gel P5BD-DPHB-HgG can detect I successively. The detection limits for Hg and I are 1.65 × 10 and 1.84 × 10 mol L, respectively. Even more significantly, the xerogel of P5BD-DPHB-G could remove Hg from aqueous solution with excellent recyclability and ingestion capacity, and with a Hg removal rate of 98%.

摘要

由于汞的急性毒性，开发用于检测和去除汞的新型材料是一个非常重要的问题。在此，通过萘酰亚胺功能化的柱[5]芳烃主体（P5BD）和双溴己烷功能化的柱[5]芳烃客体（DPHB）的协作，构建了一种新型超分子聚合物 P5BD-DPHB。P5BD-DPHB 可以形成稳定的超分子凝胶（P5BD-DPHB-G）。有趣的是，P5BD-DPHB-G 通过与 Hg 的阳离子-π 相互作用表现出选择性荧光“开启”检测，具有高选择性和灵敏度。此外，Hg 配位的超分子凝胶 P5BD-DPHB-HgG 可以依次检测 I。Hg 和 I 的检测限分别为 1.65×10 和 1.84×10 mol L。更重要的是，P5BD-DPHB-G 的干凝胶可以从水溶液中去除 Hg，具有极好的可回收性和摄取能力，Hg 的去除率为 98%。