Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy最新文献

{"title":"Analysis of the carotenoid cycle during microbial growth by combining fluorescence imaging and deep learning","authors":"Haosi Huang ,&nbsp;Lin He ,&nbsp;Haihua Fan","doi":"10.1016/j.saa.2025.126641","DOIUrl":"10.1016/j.saa.2025.126641","url":null,"abstract":"<div><div>Detection and real-time tracking of changes in the relative carotenoid content during microbial growth can be extremely challenging. Additionally, analyzing its content cycling time can also be highly difficult. In this study, Raman tweezers were employed to identify the carotenoid in two strains of marine <em>Bacillus</em> spores (designated #2430 and #2966). Further, live-cell dynamic imaging and fluorescence microscopy were utilized to observe the growth morphology and monitor the variations in the relative carotenoid content within the spores. Additionally, a UNet-VGG16-based deep learning algorithm was incorporated to augment the precision of the analysis. The results of this study revealed the presence of varying levels of carotenoids between the two strains of spores across different growth stages. The dividing spores showed a progressive elongation in the cycle of relative carotenoid content fluctuation. In contrast, the non-dividing spores demonstrated more stable cycles, likely due to the lack of carotenoid accumulation, as they required carotenoids for their normal growth rather than cell division. To the best of our knowledge, this study is the first to detect dynamic and real-time variations in the relative carotenoid content during the growth of the two marine <em>Bacillus</em> spore strains, thereby providing novel perspectives on their metabolic characteristics and potential applications</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126641"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Urine-based Raman markers for prostate cancer diagnosis: A machine learning approach using fingerprint and lipid spectral region","authors":"Przemysław Mitura ,&nbsp;Wiesław Paja ,&nbsp;Grzegorz Młynarczyk ,&nbsp;Radosław Kowalski ,&nbsp;Krzysztof Bar ,&nbsp;Joanna Depciuch","doi":"10.1016/j.saa.2025.126661","DOIUrl":"10.1016/j.saa.2025.126661","url":null,"abstract":"<div><div>This study investigates the potential of Raman spectroscopy in distinguishing between healthy individuals and prostate cancer patients using urine samples. The Boruta algorithm was applied to Raman spectral data in two distinct wavenumber regions: 800–1800 cm⁻¹ (fingerprint region) and 2800–3000 cm⁻¹ (lipid region). The algorithm identified important spectral features from both regions that were used to construct decision trees for classification. Key wavenumbers in the fingerprint region (1009 cm⁻¹) and high-wavenumber region (2937 cm⁻¹) were found to be significant markers for prostate cancer detection. Principal Component Analysis (PCA) revealed that the intensity of these markers effectively separated healthy and cancerous samples, with the 1009 cm⁻¹ marker showing higher discriminative power. Furthermore, four classification models: Decision Tree (DT), k-Nearest Neighbors (kNN), Random Forest (RF), and Support Vector Machine (SVM) were evaluated for their performance in classifying urine samples based on Raman spectral features. The RF and kNN models exhibited the best overall performance, with high accuracy and sensitivity, particularly in the 800–1800 cm⁻¹ region. The study also explored the correlation between Raman markers and clinical parameters, finding that the 2937 cm⁻¹ marker had strong correlations with critical clinical variables like Gleason scores and MRI PIRADS scores, suggesting its utility for prostate cancer diagnosis and staging. These findings highlight the potential of Raman spectroscopy as a non-invasive tool for prostate cancer detection and monitoring.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126661"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A hydrogen bond-triggered excimer probe for dynamic monitoring of aspartic acid and glutamic acid","authors":"Xudong Xie,&nbsp;Xing Wang,&nbsp;Yuanhang Li,&nbsp;Li Yang,&nbsp;Zhengjian Qi","doi":"10.1016/j.saa.2025.126659","DOIUrl":"10.1016/j.saa.2025.126659","url":null,"abstract":"<div><div>Aspartic acid (Asp) and glutamic acid (Glu), as critical neurotransmitters, exhibit concentration abnormalities closely associated with epilepsy, Alzheimer's disease, and other neurological disorders. However, current detection methods face limitations in selectivity, sensitivity, and practicality. In this study, we developed a series of novel D-π-A structured fluorescent probes (<strong>PM-1</strong>, <strong>PM-2</strong>, <strong>PM-3</strong>, and <strong>PM-4</strong>), Among which <strong>PM-4</strong> demonstrates weak monomer emission (540 nm) in aqueous solution. The pyridine side chain of PM-4 forms hydrogen bonds with the dual carboxylate groups of Asp/Glu, triggering the formation of emissive excimers. This process generates a new, enhanced red-shifted emission peak at 630 nm, enabling specific detection. The detection limits reached 1.26 μM (Asp) and 1.29 μM (Glu), with high selectivity. The formation mechanism of the probe-analyte complex was confirmed by NMR titration experiments. <strong>PM-4</strong> successfully monitored diurnal fluctuations of Asp/Glu in saliva samples from healthy volunteers and concentration variations after smoking, revealing a correlation with emotional states (e.g., peak concentrations observed 10 min after smoking). The developed <strong>PM-4</strong> probe integrates high sensitivity, selectivity, providing a powerful analytical tool for neurometabolic studies and disease biomarker detection. Its demonstrated performance highlights promising potential for both fundamental research and diagnostic product development.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126659"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly selective and portable fluorescent detection of uranyl in groundwater via AIEgen-labeled protein cleavage","authors":"Yueru Chen ,&nbsp;Zehan Yan ,&nbsp;Dengkai Zhang ,&nbsp;Xiaofang Zhao ,&nbsp;Zongning Guo ,&nbsp;Xuelin Huang ,&nbsp;Jiangying Qu ,&nbsp;Jing Zhang ,&nbsp;Yueting Wang ,&nbsp;Zhe Jiao","doi":"10.1016/j.saa.2025.126685","DOIUrl":"10.1016/j.saa.2025.126685","url":null,"abstract":"<div><div>To achieve highly selective and portable detection of uranyl (UO₂²⁺) in potentially polluted groundwater, a fluorescent detection method based on UO₂²⁺-triggered protein cleavage was established. An aggregation-induced emission luminogen (AIEgen), 4-aldehyde-4′,4″-bis(4-pyridyl)triphenylamine, (CHO-BIPY-TPA, abbreviated as CBPT), was synthesized and labeled onto bovine serum albumin (BSA). The fluorescence of CBPT-BSA was quenched by UO₂²⁺-triggered covalent bond cleavage and protein fragment release. A linear response was observed in the range of 0.1–12 nM with a LOD of 0.01 nM, significantly outperforming the World Health Organization's drinking water limit (60 nM). Selectivity tests confirmed negligible interference from coexisting metal ions as only UO₂²⁺ could triggered protein cleavage. In additon, a portable device was designed for on-site detection of UO₂²⁺ in underground water, which exhibited a linear response in the range of 0.1–15 nM with a LOD of 0.06 nM. The spiked recovery rate reached 85–96 % in environmental water samples, with a relative standard deviation (RSD) below 8 %. The study provided a selective and sensitive screening platform for on-site monitoring UO₂²⁺ in environmental samples.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126685"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on structural and spectroscopic properties of germanate-phosphate glasses doped with Eu3+ ions","authors":"Marta Kuwik ,&nbsp;Karolina Dej ,&nbsp;Tomasz Goryczka ,&nbsp;Joanna Pisarska ,&nbsp;Wojciech A. Pisarski","doi":"10.1016/j.saa.2025.126658","DOIUrl":"10.1016/j.saa.2025.126658","url":null,"abstract":"<div><div>The effect of introducing germanium(IV) oxide as additional glass-forming oxide in the phosphate matrix with molar composition xGeO₂-(60-x)P₂O₅-30BaO-9.5Ga₂O₃–0.5Eu₂O₃, (where x = 5, 10, 15, 20, 30, 40, 45, 50, 55) was investigated. Changes in the glass local structure examined with infrared (IR-ATR) and Raman spectroscopy are closely related to glass composition. It was observed that with increasing GeO₂:P₂O₅ molar ratio, depolymerization of the phosphate network occurs by transforming Q² units into Q¹ or Q⁰ units. The luminescence properties of germanate-phosphate systems were determined by analyzing the excitation and emission spectra. The evaluated phonon energy decreases along with increasing GeO₂:P₂O₅ molar ratio, from 1145 cm⁻¹ to 924 cm⁻¹, proving that synthesized glasses can be considered relatively low phonon energy systems. The study of relations of bands assigned to transitions ⁵D₀ → ⁷F₁ (orange) and ⁵D₀ → ⁷F₂ (red) corresponds to the correlation between local structure and spectroscopic properties of systems doped with Eu³⁺ ions. It was determined that the value of fluorescence intensity ratio R/O is higher (5.58) in samples containing higher concentration of GeO₂ (55 mol%) in the matrix. The local symmetry around Eu³⁺ ions was increasing along with rising amount of phosphate structural units in the glass systems. Acquired results indicate that incorporating germanium(IV) oxide into phosphate glass matrix allows to obtain lower phonon energy of the host. Although the relation between the phonon energy and local symmetry of Eu³⁺ ions is not evident, it could be stated that for systems with low phonon energy, the degree of symmetry of the local structure may be high.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126658"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144613959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting ratiometric fluorescence detection via dual-antenna and bi-ligand strategies in a dual-emission Eu-MOF probe","authors":"Sameera Sh. Mohammed Ameen ,&nbsp;Faisal K. Algethami ,&nbsp;Khalid M. Omer","doi":"10.1016/j.saa.2025.126653","DOIUrl":"10.1016/j.saa.2025.126653","url":null,"abstract":"<div><div>The development of a dual-emitting fluorophore with strong fluorescence intensity and long-term stability is essential for innovative, efficient, and user-friendly sensing platforms in bioanalysis, enabling precise detection and broad applicability in real-world scenarios. In this study, a dual-antenna effect was successfully integrated into a single dual-ligand europium-based metal-organic framework (BiL-MOF), which was both designed and systematically investigated. Upon excitation at 250 nm, the BiL-MOF exhibited two distinct emissions: a blue emission at 365 nm and the characteristic red emission peaks of Eu³⁺ ions. The use of two different ligands enabled efficient energy transfer from the excited states of the ligands to the ⁵D₀ state of Eu³⁺ ions, facilitating the dual-antenna effect. This phenomenon, along with the sensitization of Eu³⁺, was confirmed through both experimental studies and theoretical analysis. The dual-antenna design significantly improved the fluorescence quantum yield, from 2 % and 10 % in mono-ligand MOFs, to 42 % in the BiL-MOF, while also enhancing structural stability. Additionally, a red shift in absorption and an associated hyperchromic effect were observed, contributing to its potential utility in a variety of sensing applications. Interestingly, folic acid (FA) simultaneously quenched both emission peaks, a behavior attributed to the inner filter effect. This dual-response mechanism enabled the development of a highly sensitive and reliable ratiometric probe for FA detection using both conventional fluorometry and smartphone-based visual readouts. The fluorometric method achieved a detection limit of approximately 0.12 μM, with a linear response range from 5.0 to 165.0 μM. The smartphone-based visual approach also demonstrated excellent performance in analyzing pharmaceutical samples, delivering recovery rates between 98.1 % and 102.2 %, with outstanding reproducibility (RSD &lt; 1 %, <em>n</em> = 4), underscoring its promise for real-world applications.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126653"},"PeriodicalIF":4.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges and spectra interpretability in textile sorting: NIR hyperspectral images and chemometrics","authors":"Giulia Gorla ,&nbsp;Frederik Nielsen ,&nbsp;Patrick Bowen Montague ,&nbsp;Nicole Kösegi ,&nbsp;José Manuel Amigo","doi":"10.1016/j.saa.2025.126665","DOIUrl":"10.1016/j.saa.2025.126665","url":null,"abstract":"<div><div>The accurate sorting and recycling of textiles are crucial for reducing waste and promoting sustainability, but the inherent complexity of textile materials presents significant challenges. This study explores the potential of Near-Infrared (NIR) hyperspectral imaging (HSI) in textile sorting, focusing on its capacity to address two key challenges: differentiating textiles with diverse chemical compositions and detecting minor components such as elastane in cotton fibers. We investigate the spectral characterization of natural, synthetic, and blended fibers, demonstrating how NIR-HSI, combined with complementary spectroscopic approaches, can provide both chemical composition and spatial distribution insights. The integration of portable spectroscopic techniques improved spectral data interpretation and models reliability. The study also highlights the challenges of detecting low concentrations of elastane, which complicate recycling processes. Through the application of multivariate chemometric techniques, such as Principal Component Analysis (PCA) and Multivariate Curve Resolution (MCR), we analyze the spectral data and identify patterns that may facilitate more effective textile classification. The results indicate that while NIR-HSI shows promise in textile sorting and recycling, the variability in spectral features due to textile treatments, environmental factors, and compositional differences remains a significant challenge. The study highlights the importance of the development of standardized spectral databases to combine with interpretation. Ultimately, the findings offer valuable insights into the feasibility of near-infrared (NIR) hyperspectral imaging as a tool for sustainable textile sorting and recycling.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126665"},"PeriodicalIF":4.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aggregation-Induced Emission (AIE) in Sucrose: Unveiling a Novel Luminescent Phenomenon for Sensing Applications","authors":"Malavika Krishnamoorthy Gayathri,&nbsp;Gopika Sajikumar,&nbsp;Gowri Mohanan,&nbsp;Saji Alex","doi":"10.1016/j.saa.2025.126636","DOIUrl":"10.1016/j.saa.2025.126636","url":null,"abstract":"<div><div>The emergence of aggregation-induced emission (AIE) in non-conjugated molecules challenges conventional paradigms in luminescent material design. Herein, we report the AIE activity of sucrose, a ubiquitous disaccharide devoid of traditional chromophores. While intrinsically non-emissive in dilute solution, sucrose exhibits robust luminescence upon aggregation, demonstrating a distinct AIE phenomenon. Furthermore, we exploit this property to develop a highly sensitive and selective fluorescence-quenching assay for ferric ions (Fe³⁺), achieving rapid and accurate detection. This discovery not only advances the fundamental understanding of AIE mechanisms but also highlights the potential of biocompatible saccharides for innovative sensing and optoelectronic applications.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126636"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of cellulose based hydrogel 3D SERS flexible substrate for the detection of urea in sweat","authors":"Yujun Zheng ,&nbsp;Ziting Ye ,&nbsp;Shuyan Ruan ,&nbsp;Jingxin Chen ,&nbsp;Lanjin Zhu ,&nbsp;Youmei Liu ,&nbsp;Yudong Lu ,&nbsp;Zixing Yan","doi":"10.1016/j.saa.2025.126664","DOIUrl":"10.1016/j.saa.2025.126664","url":null,"abstract":"<div><div>Au NRs/HA/CMC-PVA hydrogel membranes were successfully prepared by mixing sodium hyaluronate (HA) and carboxymethyl cellulose (CMC) solutions for immersion crosslinking on the basis of freeze-thaw crosslinking of polyvinyl alcohol (PVA) with gold nanorods (Au NRs). By adjusting the density of Au NRs and the concentrations of CMC and HA, more ‘hot spots’ could be generated to enhance the SERS signals, thus improving the sensitivity and homogeneity of the hydrogels (low detection limit of 10⁻⁹ mol/L Rhodamine 6G (R6G), RSD = 3.04 %). Meanwhile, the strong hydrogen bonds formed in the hydrogel network were utilized to increase the cross-linking degree of the hydrogels, which led to the improvement of the mechanical properties and flexural flexibility of the hydrogels (elongation at break of 308.07 % and tensile strength of 26.09 MPa). The hydrophilic groups of the Au NRs/HA/CMC-PVA hydrogel film were able to adsorb sweat and diffuse urea molecules from sweat into the hydrogel. It showed high sensitivity for the detection of urea, exhibiting a linear relationship at concentrations of 1000–1 mM, with a LOD = 7.83 × 10⁻⁵ M.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126664"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective and efficient detection of MnO4−, CrO42− and Cr2O72− in aqueous solutions with two novel bis-oxime Zn(II)-based complexes","authors":"Jia-Ying Ren ,&nbsp;Hao-Nan Shi ,&nbsp;Yuan-Min Niu ,&nbsp;Hong-Guang Pang ,&nbsp;Li Wang","doi":"10.1016/j.saa.2025.126672","DOIUrl":"10.1016/j.saa.2025.126672","url":null,"abstract":"<div><div>Detection of MnO₄⁻, CrO₄²⁻ and Cr₂O₇²⁻ in aqueous solutions is of importance for environmental protection. Herein, a new bis-oxime-type ligand H₃L was thoughtfully designed and synthesized, H₃L = ((1E,1′E)-O,O′-((2-hydroxy-5-methyl-1,3-phenylene)bis(methylene))bis(1-(2-hydroxy-3-methoxyphenyl)-2-hydroxy-3- methoxybenzaldehyde oxime)). Two Zn(II) complexes, [Zn₆L₂ (<em>μ</em>₂-OAc)₄(<em>μ</em>₃-OH)₂] (<strong>1</strong>) and [Zn₄L₂(<em>μ</em>₃-OCH₃)₂·MeOH] (<strong>2</strong>), were constructed by slow evaporation at room temperature. Considering the excellent performance of the Zn(II) complexes in the field of fluorescence analysis and sensing, fluorescence sensing experiments were conducted on MnO₄⁻, CrO₄²⁻ and Cr₂O₇²⁻ in aqueous solutions. The experimental results indicate that the two Zn(II) complexes exhibited high selectivity and sensitivity for the detection of MnO₄⁻, CrO₄²⁻ and Cr₂O₇²⁻ by fluorescence quenching. Both sensors have a relatively low detection limit for MnO₄⁻, CrO₄²⁻ and Cr₂O₇²⁻, and have a high quenching constant (The K_sv of <strong>1</strong> for MnO₄⁻ is 7.29 × 10⁵ M⁻¹; for CrO₄²⁻ is 1.40 × 10⁶ M⁻¹, and for Cr₂O₇²⁻ is 2.23 × 10⁵ M⁻¹. The K_sv of <strong>2</strong> for MnO₄⁻ is 6.59 × 10⁵ M⁻¹; for CrO₄²⁻ is 9.26 × 10⁵ M⁻¹, and for Cr₂O₇²⁻ is 1.40 × 10⁵ M⁻¹). Through hirshfeld surface analysis, the presence of hydrogen bonding interactions and π···π interactions in <strong>1</strong> and <strong>2</strong> was calculated. Moreover, sensor-coated portable PMMA (polymethylmethacrylate) luminescent films devices were fabricated for easy and rapid on-site detection of the MnO₄⁻, CrO₄²⁻ and Cr₂O₇²⁻ in aqueous solutions.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126672"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}