高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (11): 1993.doi: 10.7503/cjcu20170519

• 物理化学 • 上一篇    下一篇

高灵敏比色检测Cu2+的反蛋白石结构光子晶体水凝胶膜

刘士荣(), 秦立彦, 张晓栋, 陈明清   

  1. 江南大学化学与材料工程学院, 合成与生物胶体教育部重点实验室, 无锡 214122
  • 收稿日期:2017-07-31 出版日期:2017-11-10 发布日期:2017-10-30
  • 作者简介:联系人简介: 刘士荣, 男, 副教授, 主要从事功能材料研究. E-mail: liushirong1@aliyun.com
  • 基金资助:
    国家自然科学基金(批准号: 21571084)资助

Highly Sensitive Colorimetric Sensing for Cu2+ by Inverse Opals of Photonic Crystal Hydrogels

LIU Shirong*(), QIN Liyan, ZHANG Xiaodong, CHEN Mingqing   

  1. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education,School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
  • Received:2017-07-31 Online:2017-11-10 Published:2017-10-30
  • Contact: LIU Shirong E-mail:liushirong1@aliyun.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21571084)

摘要:

以丙烯酰胺(AM)和N-乙烯基咪唑(NVI)为双功能单体, 借助“三明治”结构有效控制前驱液的填充, 制备了可特异性识别Cu2+的反蛋白石结构光子晶体水凝胶膜(PCHs). 该PCHs具有相互贯通的三维有序大孔结构, 可在Cu2+缓冲溶液中快速响应, 产生特征的布拉格(Bragg)衍射峰. 随着Cu2+浓度的增大(0~10-4 mol/L), PCHs的Bragg衍射峰位移66 nm, 并伴随着明显的颜色变化(由棕红色逐渐变为黄绿色). 此外, PCHs在混合金属盐溶液中仍能实现对Cu2+的特异性识别. PCHs对Cu2+的特异识别性、 快速响应及自表达的特点为Cu2+现场快速检测提供了可能.

关键词: “三明治”结构, 反蛋白石, 光子晶体, 水凝胶, Cu2+检测

Abstract:

Inverse opals of photonic crystal hydrogels(PCHs) composed of acrylamide(AM) and N-vinyl imidazole(NVI) copolymers were fabricated for the specific detection of Cu2+. A “sandwich” structure was used to control the precursor infiltration in order to endow PCHs with highly ordered three-dimensional interconnected macroporous structure. The acquired PCHs produced the characteristic Bragg diffraction peak when immersed into Cu2+ buffers, and exhibited a rapid response. With the increase of concentration of Cu2+ from 0 mol/L to 10-4 mol/L, Bragg diffraction peak of PCHs blueshifted 66 nm and the color change was visible to the naked eyes(from brown to kelly green). Furthermore, PCHs exhibited efficient recognition to Cu2+ in the multicomponent metal ion solution. Such a specific recognition, rapid response and signal self-reporting of PCHs to Cu2+ provide great potential for the real-time monitor of Cu2+.

Key words: “Sandwich”, structure, Inverse opals, Photonic crystals, Hydrogels, Detection of Cu2+

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