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使用掺入透明疏水膜中的锌卟啉对水中吡啶进行超灵敏检测。

Ultra-sensitive detection of pyridine in water using zinc porphyrin incorporated in a transparent hydrophobic film.

作者信息

Sasai Ryo, Aoyama Yu-Hei, Fujimura Takuya

机构信息

Graduate School of Natural Science and Technology, Shimane University, 1060 Nishi-Kawatsu-cho, Matsue, 690-8504, Japan.

出版信息

Sci Rep. 2022 Apr 6;12(1):5815. doi: 10.1038/s41598-022-09927-x.

DOI:10.1038/s41598-022-09927-x
PMID:35388116
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8987095/
Abstract

In this study, we investigated the axial coordination reaction between pyridine and zinc meso-tetra(4-sulfonatophenyl)porphyrin (ZnTPPS) incorporated in a transparent layered double hydroxide (LDH) film modified with 1-decanesulfonate (C10S) in an aqueous solution. The apparent equilibrium constant ([Formula: see text]) of the axial coordination reaction between pyridine and ZnTPPS incorporated in the transparent ZnTPPS/C10S/LDH film was approximately 260 times that of the corresponding reaction in an aqueous solution. The hydrophobisation of the LDH interlayer space by C10S, which led to the elimination of water molecules surrounding ZnTPPS and enabled the accumulation of pyridine molecules, was responsible for such a significant increase in the apparent [Formula: see text] value. The developed film can detect pyridine in aqueous solutions with ultra-high sensitivity in the order of 10 mol/L through changes in the colour tone, which is comparable to the molecular detection ability of insect antennae. The sensing response was also observed at pyridine concentrations as low as 10 mol/L.

摘要

在本研究中，我们研究了吡啶与锌中-四(4-磺酸苯基)卟啉(ZnTPPS)之间的轴向配位反应，该反应发生在水溶液中用1-癸烷磺酸盐(C10S)改性的透明层状双氢氧化物(LDH)薄膜中。在透明的ZnTPPS/C10S/LDH薄膜中，吡啶与ZnTPPS之间轴向配位反应的表观平衡常数([公式：见正文])约为相应水溶液中反应的260倍。C10S使LDH层间空间疏水化，导致围绕ZnTPPS的水分子被去除，并使吡啶分子得以积累，这是表观[公式：见正文]值显著增加的原因。所制备的薄膜能够通过色调变化以10 mol/L的超高灵敏度检测水溶液中的吡啶，这与昆虫触角的分子检测能力相当。在低至10 mol/L的吡啶浓度下也观察到了传感响应。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/7faf1786d6e9/41598_2022_9927_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/0e27a6cb3075/41598_2022_9927_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/6f852ab597d3/41598_2022_9927_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/863e21482c39/41598_2022_9927_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/f96a1996e1ee/41598_2022_9927_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/c614ec34e606/41598_2022_9927_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/7faf1786d6e9/41598_2022_9927_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/0e27a6cb3075/41598_2022_9927_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/6f852ab597d3/41598_2022_9927_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/863e21482c39/41598_2022_9927_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/f96a1996e1ee/41598_2022_9927_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/c614ec34e606/41598_2022_9927_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d1e3/8987095/7faf1786d6e9/41598_2022_9927_Fig6_HTML.jpg

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