基于柱芳烃主客体相互作用构筑硫化氢响应性聚集诱导荧光超分子聚合物材料

Hydrogen sulfide (H2S), a significant signal gas molecule in mammals, plays an important role in maintaining life. However, it is also a toxic gas as an environmental hazard, especially in our country which H2S far exceeds the standard content. Therefore, effective detection of H2S is a top issue. Though traditional H2S fluorescent probes have been commonly used for the detection of H2S in solution state for biological systems, the fluorescent material for detection of H2S in the atmosphere has been rarely reported. Herein, we design a series of H2S-responsive material constructed from pillararene-based AIE fluorescent supramolecular polymers. In these systems, salicylaldehyde azine derivatives are used as AIE fluorescent groups. In addition, dinitrophenyl ether is incorporated into the systems because of their thiolysis property. Moreover, these groups are connected by pillararenes-based host−guest interactions to obtain a variety of supramolecular polymers. By investigating the influence of H2S on the self-assembly behavior, morphology, mechanical strength, viscosity and stability of these polymers, we can select the appropriate solid/gel fluorescent material for the detection of H2S in the atmosphere. Therefore, the transfer of functional organic molecular probes from solution to solid or colloidal materials can be realized, which will extent the application of pillararenes in the field of functional supramolecular materials.

硫化氢（H2S）气体分子在哺乳动物体内是一种重要的信使分子，对维持生命体具有重要的意义，但是在大气环境中则被视为一种剧毒的化学物质，特别是在雾霾严重的中国，H2S的含量严重超标。有效的检测H2S已是当务之急，传统的H2S荧光探针只适合于在液相中对生物体内H2S的检测，但是适用于对大气环境中H2S检测的荧光材料则相对缺乏。申请人拟选用二水杨醛缩肼衍生物为发光基团，利用硫解2,4-二硝基苯醚识别机理，通过基于柱芳烃主客体相互作用构建不同类型的超分子聚合物，分析对比H2S对这一系列超分子聚合物在组装方式，形貌，强度，粘度，稳定性等方面的影响，筛选适用于检测大气环境中H2S的固体/胶体荧光材料。同时，这也是将功能有机小分子探针从溶液相转移到固相/胶体材料中的有效途径，从而进一步拓展柱芳烃在功能超分子材料领域中的应用。

H2S在大气环境中则被视为一种剧毒的化学物质，特别是在雾霾严重的中国，H2S的含量严重超标。有效的检测H2S已是当务之急，传统的H2S荧光探针只适合于在液相中对生物体内H2S的检测，但是适用于对大气环境中H2S检测的荧光材料则相对缺乏。本项目旨在通过主客体相互作用构建不同类型的超分子聚合物，开发有效的H2S响应性的超分子聚合物材料。同时，这也是将有机小分子探针从溶液相转移到固相/胶体材料中的有效途径，从而进一步拓展柱芳烃在功能超分子材料领域中的应用。本项目重点从三个方向进行了研究和探索：一、建立了新的基于柱芳烃的主客体识别体系；二、构筑了一系列超分子聚合物；三、将有机小分子探针从溶液相转移到固相/胶体材料中，并构筑了H2S响应性的超分子聚合物材料。目前为止，涵待解决的问题是H2S气体的定量检测依然有待进一步提高；超分子聚合物的强度有待加强。后续的工作将构筑更多不同种类的聚合物，研究其在组装方式、组装形貌、聚合物强度、粘度、稳定性、适用性等方面的差异，分析其对大气环境中H2S的响应性、专一性、选择性、实用性等，为构筑高效专一的检测大气中H2S荧光探针奠定基础。