Controllable porosities of conjugated microporous polytriphenylamine enable high sensitivity toward trimethylamine at low temperatures

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-04-08 DOI:10.1007/s40843-024-3298-0

Weisi He (, ), Jichun Li (, ), Sijie Chen (, ), Yonghui Deng (, ), Shuang Li (, ), Charl F. J. Faul, Yaozu Liao (, )

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引用次数: 0

Abstract

The development of trimethylamine (TMA) gas sensors is crucial for environmental monitoring, food safety, and health surveillance. However, it is difficult to achieve stable detection of TMA with low concentration at a low temperature. In this work, a series of conjugated microporous polytriphenylamine (PTPA) were designed and synthesized, with tunable porosity and surface area, using Hansen solubility parameters and nanosilica spheres as templates. Compared to pure PTPA (R = 4 for 100 ppm), the modified PTPA derivatives exhibited significantly enhanced TMA sensing performance, with NaF-PTPA achieving a remarkable sensitivity (R = 22 for 100 ppm) and a low detection limit of 0.53 ppm. The NaF-PTPA based sensor also demonstrated excellent long-term stability, maintaining consistent performance over 30 days at 54 °C. The impressive results can be attributed to the protonation (–NH₂⁺), modified porosity and increased surface area. Hence, this strategy presents new insights for the advancement of low-temperature sensing technologies.

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共轭微孔聚三苯胺的可控孔隙率使其在低温下对三甲胺具有较高的灵敏度

三甲胺（TMA）气体传感器的研制对环境监测、食品安全和健康监测具有重要意义。然而，在低温条件下难以实现低浓度TMA的稳定检测。本文以Hansen溶解度参数和纳米二氧化硅球为模板，设计并合成了一系列孔隙度和比表面积可调的共轭微孔聚三苯胺（PTPA）。与纯PTPA （100 ppm时R = 4）相比，改性后的PTPA衍生物具有显著增强的TMA检测性能，其中NaF-PTPA具有显著的灵敏度（100 ppm时R = 22）和较低的检出限（0.53 ppm）。基于NaF-PTPA的传感器也表现出出色的长期稳定性，在54°C下保持30天的稳定性能。令人印象深刻的结果可归因于质子化（-NH2 +），孔隙度的改变和表面积的增加。因此，该策略为低温传感技术的进步提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.