A pyrene-based fluorescent sensor for the discrimination and estimation of hydrazine and hydrogen sulfide and its application in assessing food spoilage

IF 12.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Vannappilakkal Sreelaya, Vasu Drisya, Lakshmi Chakkumkumarath
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Abstract

Hydrazine (N2H4) and hydrogen sulfide (H2S) are environmental contaminants that adversely affect human health. Fluorescence-based detection methods for these analytes utilize their nucleophilicity and reducing ability. Therefore, fluorescent sensors capable of detecting and distinguishing hydrazine and H2S are highly beneficial. With this objective, we synthesized a pyrene-based fluorophore, 2-(pyren-1-ylmethylene)malononitrile (PMM), to detect and differentiate hydrazine and H2S in various media and real samples. Using colorimetric and fluorimetric techniques, we examined the reaction of PMM with these analytes. Although they underwent 1,4-addition with PMM to generate a ratiometric response, the reactions followed different pathways, leading to two different products with distinct emission profiles. The reaction of PMM with hydrazine yielded the corresponding azine Py-Az, resulting in a ratiometric fluorescence response characterized by the emergence of a new peak at 458 nm and a simultaneous reduction in emission intensity at 540 nm. PMM was able to detect hydrazine in soil and water as well as its vapors. Likewise, PMM successfully detected and quantified H2S in solution and human blood serum. The addition of H2S to PMM solution resulted in a ratiometric response characterized by an increase in the intensity of pyrene monomer emission, accompanied by a concurrent decrease in emission at 540 nm. Using PMM, we also demonstrated the sequential detection of hydrazine, Cu2+, and H2S. This detection utilizes the affinity of Py-Az for Cu2+ and the subsequent demetallation of the Py-Az-Cu complex facilitated by H2S. Overall, PMM generated a ratiometric response to hydrazine, a turn-on response to Cu2+, and a turn-off response to H2S. Given that PMM exhibited a ratiometric response to H2S, PMM-coated filter paper strips were also employed to assess the freshness of protein-rich foods such as fish and meat.

Abstract Image

基于芘的联氨和硫化氢荧光传感器及其在食品变质评价中的应用
联氨(N2H4)和硫化氢(H2S)是对人体健康有不利影响的环境污染物。这些分析物的荧光检测方法利用它们的亲核性和还原能力。因此,能够检测和区分联氨和H2S的荧光传感器是非常有益的。为此,我们合成了一种基于芘的荧光团,2-(芘-1-基亚甲基)丙二腈(PMM),用于在各种介质和实际样品中检测和区分肼和H2S。使用比色法和荧光法技术,我们检测了PMM与这些分析物的反应。虽然它们经过了PMM的1,4加成反应来产生比例反应,但反应遵循不同的途径,导致两种不同的产物具有不同的发射曲线。PMM与肼反应生成相应的嘧啶Py-Az,产生比例荧光响应,其特征是在458nm处出现新峰,同时在540nm处发射强度降低。PMM能够检测土壤和水中的肼及其蒸气。同样,PMM成功地检测和定量了溶液和人血清中的H2S。在PMM溶液中加入H2S后,芘单体的发射强度增加,但在540 nm处发射强度降低。使用PMM,我们还演示了联氨、Cu2+和H2S的顺序检测。这种检测利用了Py-Az对Cu2+的亲和力以及随后在H2S的促进下Py-Az- cu配合物的脱金属作用。总的来说,PMM对肼产生比例响应,对Cu2+产生开启响应,对H2S产生关闭响应。鉴于PMM对H2S表现出比例响应,PMM涂层的滤纸条也被用于评估富含蛋白质的食物(如鱼和肉)的新鲜度。
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来源期刊
Journal of Hazardous Materials
Journal of Hazardous Materials 工程技术-工程:环境
CiteScore
25.40
自引率
5.90%
发文量
3059
审稿时长
58 days
期刊介绍: The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.
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