Heterocyclic-based Schiff base material designed as optochemical sensor for the sensitive detection of chlorinated solvent vapours

IF 2.8 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Research on Chemical Intermediates Pub Date : 2024-07-27 DOI:10.1007/s11164-024-05359-6

Erkan Halay, Inci Capan, Rifat Capan, Emriye Ay, Yaser Acikbas

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Abstract

Herein, a newly synthesized intermediate, piperazine-based Schiff base (PBSB) gas sensor was fabricated by the Schiff base condensation of amino functionalized methylpiperazine with aromatic aldehyde containing nitro substituent. This organic sensor material was structurally identified with spectroscopic techniques such as FTIR, HRMS, ¹H- and ¹³C-NMR. The designed sensor candidate was explored for its optical response to chlorinated volatile organic compounds, namely trichloroethylene, dichloromethane and chloroform in the light of structure–property relationship investigation by using surface plasmon resonance (SPR) technique. The results showed that Schiff bases could be candidates for chlorinated vapour sensing materials with their good response and reversibility. Concordantly, compound PBSB exhibited good response against chlorinated solvent vapours aided by the electron-withdrawing group on benzene ring that promoted better intermolecular interactions and opened up a new strategy to create a novel set of responsive materials for gas sensing applications. In addition, the adsorption kinetics of SPR data obtained from PBSB spun film on exposure to these chlorinated vapours at different concentrations was also evaluated using the Elovich Model. The values of the initial adsorption rate, a and Elovich constant, b were analysed depending on the concentration values and the highest values were obtained for dichloromethane between 372.92 and 4377.53 ppm/mm².

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设计用作光化学传感器的杂环基希夫碱材料，用于灵敏检测氯化溶剂蒸汽

本文通过氨基官能化甲基哌嗪与含硝基的芳香醛的席夫碱缩合反应，制造出一种新合成的中间体--哌嗪基席夫碱（PBSB）气体传感器。利用傅立叶变换红外光谱、 HRMS、1H- 和 13C-NMR 等光谱技术对这种有机传感器材料进行了结构鉴定。利用表面等离子体共振（SPR）技术，从结构-性能关系的角度研究了所设计的候选传感器对氯化挥发性有机化合物（即三氯乙烯、二氯甲烷和氯仿）的光学响应。结果表明，希夫碱具有良好的响应性和可逆性，可以作为氯蒸汽传感材料的候选材料。同时，化合物 PBSB 对氯化溶剂蒸汽表现出了良好的响应，这得益于苯环上的抽电子基团促进了分子间更好的相互作用，为创建一套新型气体传感应用响应材料开辟了新策略。此外，还利用埃洛维奇模型评估了 PBSB 纺丝薄膜在暴露于这些不同浓度的氯化蒸气时获得的 SPR 数据的吸附动力学。根据浓度值分析了初始吸附率 a 和埃洛维奇常数 b 的值，二氯甲烷在 372.92 和 4377.53 ppm/mm2 之间的吸附率值最高。

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来源期刊

Research on Chemical Intermediates 化学-化学综合

CiteScore

5.70

自引率

18.20%

发文量

229

审稿时长

2.6 months

期刊介绍： Research on Chemical Intermediates publishes current research articles and concise dynamic reviews on the properties, structures and reactivities of intermediate species in all the various domains of chemistry. The journal also contains articles in related disciplines such as spectroscopy, molecular biology and biochemistry, atmospheric and environmental sciences, catalysis, photochemistry and photophysics. In addition, special issues dedicated to specific topics in the field are regularly published.