Journal of hazardous materials letters最新文献_第4页

Visualization and spatial mapping of PFAS in the edible storage root of radish 萝卜可食贮藏根中PFAS的可视化与空间制图

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2025-02-01 DOI: 10.1016/j.hazl.2025.100141

Yuwei Zuo, Weilan Zhang

Plants, as key components of trophic networks, play a critical role in the bioaccumulation of PFAS and their transfer to higher trophic levels. This study introduces an innovative methodology using timsTOF fleX MALDI-2 to visualize the spatial distribution of PFAS in plant tissues. Radish was selected as the model plant due to its global popularity as a widely consumed vegetable. DAN (1,5-diaminonaphthalene) was used as the MALDI matrix, and the mass spectrometry operating conditions were optimized to acquire the best PFAS signals. The results show that long-chain PFAS predominantly accumulated in the xylem of the edible storage root, where their high hydrophobicity limits upward translocation. In contrast, short-chain PFAS and PFOA exhibited stronger signals in the cortex and periderm, likely due to alternative transport pathways. This differential distribution highlights the significant influence of PFAS physicochemical properties, such as chain length and hydrophobicity, on their in-planta transport mechanisms. By precisely mapping PFAS within plant tissues, this study provides a powerful tool for identifying high-risk edible tissues and assessing human exposure risks through PFAS-contaminated crops. It also reinforces the urgent need for sustainable remediation strategies to reduce PFAS levels in agricultural systems, thereby safeguarding food safety, ecosystem health, and human well-being.

植物作为营养网络的关键组成部分，在PFAS的生物积累和向更高营养水平的转移中起着关键作用。本研究介绍了一种创新的方法，使用timsTOF fleX MALDI-2来可视化植物组织中PFAS的空间分布。萝卜作为一种广泛食用的蔬菜，在全球范围内广受欢迎，因此被选为示范植物。以DAN（1,5-二氨基萘）为MALDI基质，优化质谱操作条件，获得最佳PFAS信号。结果表明，长链PFAS主要积聚在可食贮藏根的木质部，其高疏水性限制了其向上转运。相比之下，短链PFAS和PFOA在皮层和外周表现出更强的信号，可能是由于不同的运输途径。这种差异分布突出了PFAS的理化性质（如链长和疏水性）对其在植物内运输机制的显著影响。通过对植物组织中PFAS的精确定位，本研究为识别高风险食用组织和评估人类通过PFAS污染作物暴露的风险提供了有力的工具。它还强调迫切需要制定可持续补救战略，以减少农业系统中全氟磺酸的水平，从而保障食品安全、生态系统健康和人类福祉。

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引用次数: 0

Elevated concentrations of quaternary ammonium compounds in childcare centers: A pilot study 托儿中心季铵化合物浓度升高：一项初步研究

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2025-01-02 DOI: 10.1016/j.hazl.2024.100138

Yao Cheng , Zhong Lv , Erika Schreder , Min Hu , Abby Mutic , Guomao Zheng , Amina Salamova

Quaternary ammonium compounds (QACs) are used as antimicrobials, preservatives, and antistatic agents in cleaning, disinfecting and personal care products, and textiles. High levels of QACs have been found in indoor dust in residential homes; however, there is limited information on QAC exposure in non-residential environments serving sensitive populations, such as childcare centers. In this study, we investigated the occurrence of QACs, including benzylalkyldimethyl ammonium compounds (BACs), dialkyldimethylammonium compounds (DADMACs), and alkyltrimethylammonium compounds (ATMACs), in dust from childcare centers and estimated daily intake of QACs by toddlers in chidlcare via dust ingestion. Nineteen QACs were detected in dust with a median total QAC concentration (ΣQAC) of 150 μg/g. BACs were the most abundant QAC group found at concentrations ranging from 2.67 to 1370 μg/g (median 90.4 μg/g) and constituted 64 % of the ΣQAC concentrations. The QAC levels in dust from childcare centers were significantly higher than concentrations previosly reported in homes. The EDIs for BACs, DADMACs, and ATMACs via dust ingestion calculated based on the 95th percentile concentrations in childcare dust were up to 30 times higher than those for toddlers in residential homes. These findings demonstrate high QAC exposure in childcares, posing significant early-life exposure for toddlers.

季铵化合物（QACs）在清洁、消毒和个人护理产品以及纺织品中用作抗菌剂、防腐剂和抗静电剂。在住宅的室内灰尘中发现了高水平的QACs；然而，在服务于敏感人群（如托儿中心）的非住宅环境中，有关QAC暴露的信息有限。在这项研究中，我们调查了包括苯烷基二甲基铵化合物（BACs）、二烷基二甲基铵化合物（dadmac）和烷基三甲基铵化合物（atmac）在内的QACs在托儿中心灰尘中的发生情况，并通过灰尘摄入估计了幼儿每日QACs的摄入量。粉尘中检测到19种QAC， QAC总浓度中位数（ΣQAC）为150 μg/g。在浓度范围为2.67 ~ 1370 μg/g（中位数为90.4 μg/g）时，BACs是最丰富的QAC组，占ΣQAC浓度的64 %。托儿所灰尘中的QAC水平明显高于之前报道的家庭浓度。根据儿童保育粉尘中第95百分位浓度计算的吸入粉尘中BACs、dadmac、atmac的EDIs比居住家庭的幼儿高出30倍。这些研究结果表明，幼儿在幼儿时期暴露于高质量空气质量物质。

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引用次数: 0

No traces of emerging and priority organic pollutants in the muscles of Procambarus clarkii suggest the feasibility of its regulated and sustainable control from uncontaminated environments 在克氏原螯虾的肌肉中没有新出现的和优先存在的有机污染物的痕迹，这表明在未受污染的环境中对其进行调控和可持续控制是可行的

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-12-30 DOI: 10.1016/j.hazl.2024.100140

Dario Savoca , Vincenzo Arizza , Gaetano Cammilleri , Leonardo Cerasino , Antonella Maccotta , Federico Marrone , Licia Pantano , Nico Salmaso , Francesco Paolo Faraone

A monitoring of organic contaminants in the muscles of the Procambarus clarkii and environmental samples of water and sediment was conducted in three Sicilian wetlands (Italy). The substances investigated in the biological samples were per- and polyfluoroalkyl substances (PFAS), phthalic acid esters (PAEs), pesticides, antibiotics, and microcystins (MCs), all of which were below the detection limit. Given that the Louisiana red swamp crayfish is considered a bioaccumulator, the results of this study indicate that these environments are not significantly contaminated by the selected pollutants. Furthermore, the study suggests the potential uses of the edible portions of this alien species. Despite P. clarkii cannot be marketed in several countries, including Italy, it is possible that the animal biomass obtained in the frame of the monitoring, control and eradication activities carried out by local authorities, could be exploited for various purposes, such as food, feed and biotechnology. This would reduce the costs associated with disposal and make these activities more sustainable in the long term, thereby contributing to the preservation of ecosystems that are currently threatened by this invasive species.

在意大利西西里的三个湿地对克氏原螯虾（Procambarus clarkii）肌肉中的有机污染物以及水和沉积物环境样本进行了监测。生物样品中检测的物质有全氟烷基和多氟烷基物质（PFAS）、邻苯二甲酸酯（PAEs）、农药、抗生素和微囊藻毒素（MCs），均低于检测限。考虑到路易斯安那州的红沼泽小龙虾被认为是一种生物蓄积器，本研究的结果表明，这些环境没有受到所选污染物的显著污染。此外，该研究还提出了这种外来物种可食用部分的潜在用途。尽管克拉氏杆菌不能在包括意大利在内的一些国家销售，但在地方当局开展的监测、控制和根除活动中获得的动物生物量有可能被用于各种目的，如食品、饲料和生物技术。这将减少与处理相关的成本，并使这些活动在长期内更具可持续性，从而有助于保护目前受到这种入侵物种威胁的生态系统。

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引用次数: 0

New Approach Methodologies: Physiological responses of daphnids to pharmaceutical mixtures 新方法方法：水蚤对药物混合物的生理反应

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-12-28 DOI: 10.1016/j.hazl.2024.100139

Emma Rowan , Anne Leung , Katie O’Rourke , Xiaofei Yin , Lorraine Brennan , Konstantinos Grintzalis

Conventional methods for water monitoring are insufficient to capture the impacts of pollution because of their sensitivity limits, while they also fail to provide mechanistic insight regarding the actions of pollutants. On the other hand, New Approach Methodologies are more and more introduced as supplementary tools that provide sensitive metrics for pollution assessment. In this context, freshwater sentinel species commonly known as water fleas were used to assess the impact of a pharmaceutical mixture. The pharmaceutical cocktail comprised of representatives of commonly encountered pharmaceuticals and specifically diclofenac, metformin, gabapentin, amoxicillin, trimethoprim, and erythromycin. Combining toxicity, phenotypic and molecular endpoints, results showed differences in mortality, feeding, key enzyme activities and metabolic perturbations, thus supporting a distinct pattern in physiological responses of daphnids that could be used to monitor and predict pollution early.

传统的水监测方法由于其灵敏度限制而不足以捕捉污染的影响，同时它们也不能提供有关污染物作用的机制见解。另一方面，越来越多地引入新方法方法作为补充工具，为污染评估提供敏感的指标。在这种情况下，通常称为水蚤的淡水哨兵物种被用来评估药物混合物的影响。药物鸡尾酒由常见药物的代表组成，特别是双氯芬酸、二甲双胍、加巴喷丁、阿莫西林、甲氧苄啶和红霉素。综合毒性、表型和分子终点，结果显示了水蚤在死亡率、摄食、关键酶活性和代谢扰动方面的差异，从而支持了水蚤生理反应的独特模式，可用于早期监测和预测污染。

引用次数: 0

Per- and polyfluoroalkyl substances in rainfall runoff from an AFFF-impacted concrete pad: A field simulation study 受afff影响的混凝土垫块降雨径流中的全氟和多氟烷基物质：一项实地模拟研究

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-28 DOI: 10.1016/j.hazl.2024.100137

Phong K. Thai , Jeffrey T. McDonough , Trent A. Key , Anita Thapalia , Scott Porman , Pritesh Prasad , Stephanie Fiorenza , Hirozumi Watanabe , Craig M. Barnes , Jochen F. Mueller

Per- and polyfluoroalkyl substances (PFAS) retained within hardscape have been observed to leach over time in numerous laboratory studies. The aim of this study was to measure the release of key PFAS in rainfall runoff from a concrete pad impacted by historical AFFF use at the field-scale. Rainfall simulations were conducted on a 5 m² (1 ×5 m) plot for 3 consecutive days. Runoff water was collected every 2 minutes and analyzed for 5 PFAS commonly associated with AFFF. Surface samples of the concrete were collected from the plot after the rainfall runoff experiment. Perfluorooctane sulfonate (PFOS) exhibited the highest concentrations within the concrete (up to ∼4000 μg kg⁻¹) and runoff water (up to 500 μg L⁻¹), followed by 6:2 fluorotelomer sulfonate (6:2 FTS). PFAS concentrations in runoff water were higher in the first sample and then decreased in the consecutive samples of each rainfall simulation. It is estimated that the percentage of the total PFAS mass within the surface of the concrete contributing to runoff samples ranged from 0.006 % (PFOS) to 0.031 % (PFHxA) per rainfall event. This suggests low but sustained PFAS leaching from AFFF-impacted concrete into runoff water. Our findings confirmed that concrete impacted by legacy use of AFFF is a likely secondary source of PFAS in runoff water and highlight some similarities and differences between laboratory- and field-scale rainfall simulations.

在许多实验室研究中，已观察到保留在硬景观中的全氟烷基和多氟烷基物质（PFAS）随着时间的推移会浸出。本研究的目的是在农田尺度上测量受历史AFFF使用影响的混凝土垫块降雨径流中关键PFAS的释放。在5 m2 （1 ×5 m）样地连续3天进行降雨模拟。每2 分钟收集一次径流水，并分析与AFFF相关的5种PFAS。雨水径流试验后，在小区内采集混凝土表面试样。全氟辛烷磺酸（PFOS）在混凝土中的浓度最高（高达~ 4000 μg kg−1），径流水中的浓度最高（高达500 μg L−1），其次是6:2氟端聚体磺酸（6:2 FTS）。径流水中PFAS浓度在第一个样品中较高，在每个降雨模拟的连续样品中依次下降。据估计，每次降雨事件中，混凝土表面总PFAS质量对径流样品的贡献百分比从0.006 % （PFOS）到0.031 % （PFHxA）不等。这表明受afff影响的混凝土中低但持续的PFAS浸出到径流水中。我们的研究结果证实，受AFFF遗留使用影响的混凝土可能是径流水中PFAS的次要来源，并强调了实验室和现场尺度降雨模拟之间的一些异同。

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引用次数: 0

Effect of triclosan on phosphate solubilising bacteria in mangrove ecosystem: In-vitro and In-vivo 三氯生对红树林生态系统中磷酸盐增溶菌的体外和体内影响

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-19 DOI: 10.1016/j.hazl.2024.100136

R.K. Dash , K. Kumar , S.P. Shukla , S. Kumar , S. Kumar H , S. Karmakar , T. Paul

Triclosan (TCS) is a widely used biocide found in medicinal, household, and personal care products, frequently detected in various environmental matrices, posing significant threats to microbial communities and overall ecosystem functioning. This study evaluates the in vivo and in vitro effects of triclosan (TCS) on phosphate-solubilising bacteria (PSB) in mangrove ecosystems. Two experimental approaches were employed: a microcosm (in vivo) study and a laboratory (in vitro) analysis. Five isolated PSB strains—Sphingomonas paucimobilis, Rhizobium radiobacter, Serratia ficaria, Klebsiella oxytoca, and Klebsiella pneumoniae—were selected from the mangrove ecosystem for investigation. The minimum inhibitory concentration (MIC) results revealed that Klebsiella pneumoniae exhibited the highest resistance to TCS among the tested strains. In vivo experiments demonstrated a significant reduction in soil-available phosphorus and enzymatic activities, including acid and alkaline phosphatase, dehydrogenase, and fluorescein diacetate (FDA) activity, in TCS-exposed samples throughout the exposure period. In vitro results showed that phosphate solubilisation decreased significantly with increasing TCS concentrations in all strains except Klebsiella pneumoniae. Overall, TCS effectively inhibited the growth of PSB in mangrove ecosystems. This study is the first to report the impact of TCS on PSB in mangroves and provides valuable data for future research on microbial communities in such environments.

三氯生（TCS）是一种广泛应用于医药、家庭和个人护理产品中的杀菌剂，经常在各种环境矩阵中检测到，对微生物群落和整体生态系统功能构成重大威胁。本研究评估了三氯生（TCS）对红树林生态系统中磷酸盐溶解菌（PSB）的体内和体外影响。采用两种实验方法：微观（体内）研究和实验室（体外）分析。从红树林生态系统中分离出少动鞘氨单胞菌、放射根瘤菌、沙雷氏菌、氧化克雷伯菌和肺炎克雷伯菌5株PSB进行研究。最低抑菌浓度（MIC）结果显示肺炎克雷伯菌对TCS的耐药性最高。体内实验表明，在整个暴露期间，暴露于tcs的样品中土壤有效磷和酶活性（包括酸性和碱性磷酸酶、脱氢酶和双乙酸荧光素（FDA）活性）显著降低。体外实验结果显示，除肺炎克雷伯菌外，所有菌株的磷酸盐增溶作用均随TCS浓度的增加而显著降低。总体而言，TCS有效抑制了红树林生态系统中PSB的生长。本研究首次报道了TCS对红树林PSB的影响，为今后研究此类环境下的微生物群落提供了有价值的数据。

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引用次数: 0

Hitchhikers on traveling microplastics: Three necessary steps for bacteria becoming dangerous invaders 微塑料旅行中的 "搭便车者"：细菌成为危险入侵者的三个必要步骤

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 10.1016/j.hazl.2024.100133

Xiaohan Zhang , Ying Zhang , Yongzheng Ma , Zhiguang Niu

Microplastics (MPs) have received great concern in recent years, and whether the bacteria carried by traveling MPs would cause ecological risks is a hot topic for debate. The colonized bacteria (i.e., hitchhikers) on traveling MPs which become invasive species in the new environment, need to be completed in three steps: arriving, falling, and growing. However, most previous studies only focused on the first step, which we think is insufficient to discuss species invasion. Thus, in this frontier review, we reviewed the progress of the current research on the uniqueness of bacterial communities on MPs, and we summarized that the uniqueness of the plastisphere was not as high as previously thought. Moreover, we explained why the three steps were necessary to complete the bacterial species invasion. Furthermore, we analyzed the technical difficulties hindering discussing MPs as invasive species carriers, as well as the perspectives in future research. Therefore, this frontier review presents new insights into the role of MPs as bacterial carriers, and suggests study directions for future research.

微塑料（MPs）近年来备受关注，其携带的细菌是否会对生态造成危害也是一个热门话题。旅行微塑料上的定殖细菌（即 "搭便车者"）在新环境中成为入侵物种，需要完成三个步骤：到达、下落和生长。然而，以往的研究大多只关注第一步，我们认为这不足以讨论物种入侵问题。因此，在这篇前沿综述中，我们回顾了目前关于MPs上细菌群落独特性的研究进展，并总结了质球的独特性并不像之前认为的那么高。此外，我们还解释了为什么完成细菌物种入侵需要三个步骤。此外，我们还分析了阻碍讨论 MPs 作为入侵物种载体的技术难点，以及未来研究的前景。因此，这篇前沿综述提出了关于 MPs 作为细菌载体的新见解，并为未来研究提出了研究方向。

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引用次数: 0

µ-X-ray fluorescence (XRF) and fluorine K-edge µ-X-ray absorption near-edge structure (XANES) spectroscopy for detection of PFAS distribution in the impacted concrete 用 µ-X 射线荧光 (XRF) 和氟 K 边 µ-X 射线吸收近边结构 (XANES) 光谱检测受影响混凝土中 PFAS 的分布情况

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 10.1016/j.hazl.2024.100134

Phong H.N. Vo , Christian Vogel , Hong T.M. Nguyen , Brett R. Hamilton , Phong K. Thai , Philipp Roesch , Franz-Georg Simon , Jochen F. Mueller

An improved understanding of the distribution of per- and polyfluoroalkyl substances (PFAS) in PFAS-impacted concrete is important for risk management and decontamination of PFAS. This study incorporates µ-X-ray fluorescence (µ-XRF) and fluorine K-edge µ-X-ray absorption near-edge structure (µ-XANES) spectroscopy to gain non-destructive insights into PFAS distribution in the impacted concrete. The μ-XRF and μ-XANES spectroscopy provided additional details on the detection of PFAS, which were not detected by the desorption electrospray ionization (DESI) imaging method conducted previously. The shorter chain PFAS were found on the top part of the concrete core (0.5 cm), and longer chain PFAS were mostly at the bottom part of the concrete core (5 cm). The inorganic fluorine fraction was also detected, and it likely hampered the detection of organic fluorine such as PFAS in the concrete. Thus, this non-destructive technique is an complementary approach to detect PFAS in contaminated concrete.

更好地了解全氟烷基和多氟烷基物质（PFAS）在受全氟烷基和多氟烷基物质（PFAS）影响的混凝土中的分布情况对于全氟烷基和多氟烷基物质（PFAS）的风险管理和净化非常重要。这项研究结合了 µ-X 射线荧光 (µ-XRF) 和氟 K 边 µ-X 射线吸收近边结构 (µ-XANES) 光谱法，以非破坏性的方式深入了解受影响混凝土中 PFAS 的分布情况。μ-XRF 和 μ-XANES 光谱为检测 PFAS 提供了更多细节，而之前进行的解吸电喷雾电离 (DESI) 成像方法没有检测到这些 PFAS。短链全氟辛烷磺酸出现在混凝土芯的顶部（0.5 厘米），长链全氟辛烷磺酸主要出现在混凝土芯的底部（5 厘米）。此外，还检测到了无机氟部分，这可能会妨碍对混凝土中有机氟（如 PFAS）的检测。因此，这种非破坏性技术是检测受污染混凝土中 PFAS 的一种补充方法。

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引用次数: 0

Per- and polyfluoroalkyl substances in feathers of waterbirds (Ardeidae) from Poyang Lake, China: Bioaccumulation, distribution, and environmental relevance 中国鄱阳湖水鸟羽毛中的全氟和多氟烷基物质：生物累积、分布和环境相关性

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-11-01 DOI: 10.1016/j.hazl.2024.100135

Nannan Wan , Bo Zhou , Limin Mo , Qiyu Wang , Shuai Liu , Miao Zhang , Yu Liu , Xiaojun Luo , Bixian Mai

Studies on the distribution characteristics and environmental relevance of per- and polyfluoroalkyl substances (PFAS) in waterbird feathers are scarce. In the present study, the concentrations of twenty-three PFAS in the remiges, coverts, body, down, and tail feathers of three common species of Ardeidae (little egret, grey heron, and Chinese pond-heron) in Poyang Lake were investigated. The total PFAS concentrations in the pinna and scapus were 38 – 42 ng/g dry weight (dw) and 21 – 38 ng/g dw, respectively; long-chain C_9–14 perfluorocarboxylic acids were abundant in all feathers. Most PFAS accumulated in the pinna; however, perfluorohexane sulfonic acid and perfluorooctane sulfonamide were predominant in the scapus. The PFAS concentrations were higher in the tail and flight feathers than in the cover and body feathers. Furthermore, the concentrations of PFAS in waterbird feathers were comparable with those in fish and higher than those in benthic invertebrates, all of which originated from Poyang Lake. The PFAS profiles in feathers were significantly and positively correlated with those in fish (r > 0.71) and benthos (r > 0.43). These results suggest that waterbird feather is a suitable biomonitor of PFAS contamination in regional freshwater ecosystems.

有关全氟烷基和多氟烷基物质（PFAS）在水鸟羽毛中的分布特征和环境相关性的研究很少。本研究调查了鄱阳湖三种常见鸟类（小白鹭、灰鹭和池鹭）羽毛中 23 种 PFAS 的浓度。羽片和肩胛骨中的全氟辛烷磺酸总浓度分别为 38 - 42 纳克/克干重（干重）和 21 - 38 纳克/克干重；所有羽毛中都富含长链 C9-14 全氟羧酸。大多数全氟辛烷磺酸在羽片中积累；但全氟己烷磺酸和全氟辛烷磺酰胺在肩胛中占主导地位。尾羽和飞行羽毛中的全氟辛烷磺酸浓度高于覆盖羽毛和体羽。此外，水鸟羽毛中的全氟辛烷磺酸浓度与鱼类相当，高于底栖无脊椎动物，这些水鸟均来自鄱阳湖。羽毛中的 PFAS 含量与鱼类（r > 0.71）和底栖动物（r > 0.43）中的 PFAS 含量呈显著正相关。这些结果表明，水鸟羽毛是区域淡水生态系统中 PFAS 污染的合适生物监测器。

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引用次数: 0

Cyanide and chloroform detection through J-aggregates based aggregation induced emission probe with real sample applications 基于聚合诱导发射探针的氰化物和氯仿检测与实际样品应用

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL

Journal of hazardous materials letters

Pub Date : 2024-10-20 DOI: 10.1016/j.hazl.2024.100132

Aqsa Pervaiz , Sohail Anjum Shahzad , Mohammed A. Assiri , Tayyeba Javid , Hasher Irshad , Katrine Qvortrup

Isopthalamide based probe DPI has been synthesized by an easy two-step substitution reaction. Unique fluorescence properties of probe DPI were exploited for sensing of CNˉ and chloroform. Various spectroscopic techniques such as NMR, LC-MS, SEM, DLS, UV-Vis. and fluorescence spectroscopy in combination with DFT studies were used to confirm efficient detection of CN‾ through a non-covalent interaction of cyanide with probe. Furthermore, probe showed fluorescence emission at 360 nm which shifted significantly to 415 nm upon addition of water exhibiting unique AIE characteristics and formation of desired J-aggregates. Mechanistically, CN‾ and chloroform were selectively detected through fluorescence quenching with 9 nM and 0.2 % v/v limit of detection (LOD), respectively. Photoinduced electron transfer (PET) was proven to be involved as a sensing mechanism. Moreover, DPI exhibited interesting solvatochromism properties. DPI was proven to be a highly sensitive probe which showed solid-state and vapor phase on-field detection of CN‾. Similar sensing behavior of DPI probe towards CN‾ was seen in food and water samples.

通过简单的两步取代反应，合成了基于间苯二甲酰胺的探针 DPI。探针 DPI 的独特荧光特性被用于传感 CNˉ 和氯仿。通过核磁共振、液相色谱-质谱、扫描电子显微镜、DLS、紫外可见光谱和荧光光谱等多种光谱技术，并结合 DFT 研究，证实了氰化物与探针的非共价作用可有效检测到 CN-‾。此外，探针在 360 纳米波长处发出荧光，当加入水后，荧光明显转移到 415 纳米波长处，显示出独特的 AIE 特性，并形成了所需的 J-聚集体。从机理上讲，通过荧光淬灭可选择性地检测到氯化萘和氯仿，检测限（LOD）分别为 9 nM 和 0.2 % v/v。光诱导电子转移（PET）被证明是一种传感机制。此外，DPI 还表现出有趣的溶解变色特性。事实证明，DPI 是一种高灵敏度的探针，可在固态和气相场上检测到 CN‾。在食品和水样品中，DPI探针也能对CN-‾产生类似的传感行为。

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引用次数: 0