Vapochromic phenazine-crown ether/tetrafluoroterephthalic acid cocrystals for selective acetaldehyde detection

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-07-23 DOI:10.1016/j.dyepig.2025.113066

Guo-Yan Liang, Xu-Xu Jia, Bing-Bing Shi, Hong Yao, Qi Lin, Wen-Juan Qu, Jin-Fa Chen, Tai-Bao Wei

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引用次数: 0

Abstract

The application of organic cocrystals in the field of selective vapochromic needs to be extensively exploited. The detection for acetaldehyde has great demand in preventing poisoning and explosion. Here, we successfully synthesized phenazino-15-crown-5 (PCE) and accomplished the cocrystal (named PCE⊂TFPA) with tetrafluoroterephthalic acid (TFPA). Interestingly, the cocrystal, as a solid-phase gas detection platform, had a selective fluorescence response to acetaldehyde among fatty aldehydes: with the adsorption and dissociation of acetaldehyde gas, the cocrystal fluorescence undergone a reversible opening-quenching change. This behavior could be attributed to acetaldehyde lowering the HOMO energy level of TFPA when the acetaldehyde molecule was close to the cocrystal. While simultaneously elevating excited state S₁ energy level of TFPA, which suppressed the CT process between host and guest molecules finally. Overall, this work on selective adsorption and cyclic response of harmful gases not only offers a general strategy for the efficient identification of organic vapors but also provides novel insights into the reversible gasochromic mechanism.

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气相变色非那嗪冠醚/四氟对苯二甲酸共晶选择性检测乙醛

有机共晶在选择性气相变色领域的应用有待广泛开发。乙醛的检测在防止中毒和爆炸方面有很大的要求。在这里，我们成功地合成了吩嗪诺-15-冠-5 (PCE)，并完成了与四氟对苯二甲酸（TFPA）的共晶（命名为PCE TFPA）。有趣的是，共晶作为固相气体检测平台，对脂肪醛中的乙醛具有选择性荧光响应：随着乙醛气体的吸附和解离，共晶荧光发生可逆的开灭变化。这种行为可能是由于当乙醛分子靠近共晶时，乙醛降低了TFPA的HOMO能级。同时提高TFPA激发态S1能级，最终抑制了主客体分子间的CT过程。总之，这项关于有害气体选择性吸附和循环响应的研究不仅为有效识别有机蒸汽提供了一般策略，而且为可逆气致变色机理提供了新的见解。

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

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.