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

A double-locked and neutrophil elastase/hypochlorite activated probe for accurate bioimaging of osteoarthritis 双锁定中性粒细胞弹性蛋白酶/次氯酸盐激活探针用于骨关节炎的精确生物成像

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-07-01 DOI: 10.1016/j.saa.2025.126623

Min Deng , Siwei Ai , Ying Liu , Hailin Zhang , Zibo Zhai , Dan Cheng , Longwei He , Songjiao Li

{"title":"A double-locked and neutrophil elastase/hypochlorite activated probe for accurate bioimaging of osteoarthritis","authors":"Min Deng , Siwei Ai , Ying Liu , Hailin Zhang , Zibo Zhai , Dan Cheng , Longwei He , Songjiao Li","doi":"10.1016/j.saa.2025.126623","DOIUrl":"10.1016/j.saa.2025.126623","url":null,"abstract":"<div><div>In osteoarthritis, hypochlorous acid (HClO)—a critical biomarker of inflammation—and neutrophil elastase (NE)—a key mediator of inflammatory responses—undergo significant changes. Fluorescent probes, which offer high sensitivity and real-time visualization, have been widely employed for osteoarthritis imaging. However, most existing probes are designed to detect only a single biomarker, which can lead to false-positive signals in complex biological environments. In contrast, dual-locked fluorescent probes, which require activation by two distinct biomarkers, offer improved specificity and reliability. These probes are particularly advantageous for multiplexed detection in arthritis-related imaging. To date, no dual-responsive fluorescent probe targeting both HClO and NE has been reported. In this study, we introduce Cou-HN, a dual-locked fluorescent probe that exhibits a significant fluorescence enhancement at 470 nm only when both HClO and NE are present simultaneously. Neither HClO nor NE alone is sufficient to trigger a notable fluorescence response. This dual-activation strategy provides Cou-HN with superior imaging accuracy compared to single-locked probes. Both in vitro and in vivo experiments confirm its excellent performance, highlighting its promise for more precise diagnosis and monitoring of osteoarthritis.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126623"},"PeriodicalIF":4.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556878","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}

引用次数: 0

Innovative engineering of red-emissive carbon dots for profoundly sensitive and recyclable determination of malachite green in fish tissue 鱼组织中孔雀石绿红色碳点深敏可循环测定的创新工程

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-07-01 DOI: 10.1016/j.saa.2025.126631

Yuan Jiao , Xuewen Miao , Xiaona Liu , Yifang Gao , Junmei Guo , Chao Liu , Lizhang Wang , Tianwei Qian , Xin Wang , Shasha Hong

{"title":"Innovative engineering of red-emissive carbon dots for profoundly sensitive and recyclable determination of malachite green in fish tissue","authors":"Yuan Jiao , Xuewen Miao , Xiaona Liu , Yifang Gao , Junmei Guo , Chao Liu , Lizhang Wang , Tianwei Qian , Xin Wang , Shasha Hong","doi":"10.1016/j.saa.2025.126631","DOIUrl":"10.1016/j.saa.2025.126631","url":null,"abstract":"<div><div>Accurate measurement of hazardous synthetic dye is highly attractive for environmental and food safety inspection. Herein, red fluorescent carbon dots (R-CDs) are meticulously engineered by employing Azure A as a fluorophore to optimize the optical characteristics, thereby promoting high-efficiency fluorescence emission at 648 nm. The constructed R-CDs demonstrate excitation-independent characteristics remarkable photostability and superior water solubility. It is encouraging that the developed R-CDs demonstrate a specific response to MG, effectively differentiating it from other substances. The engineered R-CDs demonstrate concentration-responsive fluorescence quenching towards MG, exhibiting rapid response time with a well-defined linear detection range of 0.09–8.21 μM and ultralow detection limit of 24.2 nM. Furthermore, the spike recovery analysis of MG in fish tissue demonstrated robust performance with recoveries of 97.63–106.0 % (RSD <6.37 %), highlighting the analytical reliability for MG identification in aquatic products. The aforementioned results underscore the significant potential of the developed R-CDs for MG detection in aquatic products and bolster their application in food safety inspections.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126631"},"PeriodicalIF":4.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556876","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}

引用次数: 0

Label Free AIEE-Driven Fluorescent Probe for Oxytetracycline: Integrating TD-DFT Study, Fingerprint Analysis and Devising Portable Sensing Strategy 无标签aiee驱动的土霉素荧光探针：结合TD-DFT研究、指纹分析和设计便携式传感策略

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-07-01 DOI: 10.1016/j.saa.2025.126633

Tayyeba Javid , Sania , Aqsa Pervaiz , Mohammed A. Assiri , Zulfiqar Ali Khan , Sohail Anjum Shahzad

{"title":"Label Free AIEE-Driven Fluorescent Probe for Oxytetracycline: Integrating TD-DFT Study, Fingerprint Analysis and Devising Portable Sensing Strategy","authors":"Tayyeba Javid , Sania , Aqsa Pervaiz , Mohammed A. Assiri , Zulfiqar Ali Khan , Sohail Anjum Shahzad","doi":"10.1016/j.saa.2025.126633","DOIUrl":"10.1016/j.saa.2025.126633","url":null,"abstract":"<div><div>Deferasirox based fluorescent probe <strong>DSA</strong> was accomplished through convenient synthetic method. Probe <strong>DSA</strong> exhibited the aggregation induced emission enhancement features along with the formation of “<em>J</em>-type aggregates”. Maximum emission wavelenghth of the probe <strong>DSA</strong> was observed at 505 nm in H<sub>2</sub>O/DMF. The absoption and emission spectral results of <strong>DSA</strong> probe were also drawn from the theoretical analysis through time dependent density functional theory (TDDFT). Theoretical spectral results were found exactly similar to the results obtained from experimental studies. The probe <strong>DSA</strong> sensitively and selectively detected the oxytetracycline showing the limit of detection of 70 nM. Probe <strong>DSA</strong> demonstrated PET based fluorescence quenching mechanism for sensing of OTC. <strong>DSA</strong>-OTC interaction was checked through UV–<em>Vis</em>. fluorescence and <sup>1</sup>H NMR titration analysis experimentally. The interaction between the <strong>DSA</strong> and OTC was non-covalent in nature which was further elucidated by performing the density functional theory (DFT) studies. Practical applicabilty was determined in human plasma and milk samples. The finger print identification through <strong>DSA</strong> was also analyzed under UV light (365 nm). <strong>DSA</strong> was practically utilized as fluorescent ink.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126633"},"PeriodicalIF":4.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556977","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}

引用次数: 0

Surface-enhanced infrared absorption (SEIRA) based on Metasurface: Principles, biochemical sensing applications, and future perspective 基于metassurface的表面增强红外吸收（SEIRA）：原理、生化传感应用及未来展望

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-30 DOI: 10.1016/j.saa.2025.126621

Yuting Wen , Hengliang Zhu , Fang Song, Ruotong Chen, Chuantao Zheng, Mingquan Pi, Yu Zhang, Yiding Wang

{"title":"Surface-enhanced infrared absorption (SEIRA) based on Metasurface: Principles, biochemical sensing applications, and future perspective","authors":"Yuting Wen , Hengliang Zhu , Fang Song, Ruotong Chen, Chuantao Zheng, Mingquan Pi, Yu Zhang, Yiding Wang","doi":"10.1016/j.saa.2025.126621","DOIUrl":"10.1016/j.saa.2025.126621","url":null,"abstract":"<div><div>As a powerful analytical technique, surface-enhanced infrared absorption (SEIRA) typically employs periodic nanostructured arrays to generate highly localized and intense electromagnetic near-field enhancements. Infrared vibrations of target sensing molecules located in these periodic nanostructured fields are enhanced by orders of magnitude enabling a spectroscopic characterization with unprecedented sensitivity. This remarkable enhancement effect enables SEIRA to overcome the inherent limitations of conventional infrared spectroscopy, particularly the small molecular absorption cross-sections. Owing to its superior performance characteristics, SEIRA has found extensive applications in biological and chemical sensing domains. This review begins with a concise overview of the historical development and fundamental basis of SEIRA technology. Subsequently, we discuss the underlying principles and mechanisms of metal and dielectric metasurfaces in SEIRA applications. Following these fundamentals, different applications based on SEIRA chemical sensors and biosensors for various target analytes are reviewed. Finally, the current challenges and prospects of SEIRA in biochemical detection are presented, highlighting potential strategies to expand its application scope.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"344 ","pages":"Article 126621"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144556875","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}

引用次数: 0

Selective detection of streptomycin using a molecularly imprinted fluorescence sensor based on mangosteen peel-derived nitrogen-doped carbon quantum dots 基于山竹皮衍生的氮掺杂碳量子点的分子印迹荧光传感器选择性检测链霉素

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-30 DOI: 10.1016/j.saa.2025.126622

Bach Pham , Dong Duong Tran , Thi Phuong Anh Nguyen , Quang Khanh Nguyen , Thi Dieu Thuy Ung , Ngoc Bich Tran , Duy Tung Vu , Thi Kim Thuong Nguyen , Thi Anh Huong Nguyen , Thi Ngoc Mai Pham

{"title":"Selective detection of streptomycin using a molecularly imprinted fluorescence sensor based on mangosteen peel-derived nitrogen-doped carbon quantum dots","authors":"Bach Pham , Dong Duong Tran , Thi Phuong Anh Nguyen , Quang Khanh Nguyen , Thi Dieu Thuy Ung , Ngoc Bich Tran , Duy Tung Vu , Thi Kim Thuong Nguyen , Thi Anh Huong Nguyen , Thi Ngoc Mai Pham","doi":"10.1016/j.saa.2025.126622","DOIUrl":"10.1016/j.saa.2025.126622","url":null,"abstract":"<div><div>Streptomycin, a broad-spectrum aminoglycoside antibiotic, is widely used in both human and veterinary medicine. Its overuse and environmental accumulation pose serious health risks, underscoring the need for sensitive and selective detection methods. In this study, we developed a molecularly imprinted fluorescence sensor (MIP-FS) by integrating nitrogen-doped carbon quantum dots (N-CQDs) with molecularly imprinted polymers (MIPs) for the selective detection of streptomycin. The N-CQDs were synthesized via a green microwave-assisted method using mangosteen peel as a sustainable and low-cost carbon source, representing an alternative biomass-based route for nanomaterial production. The resulting N-CQDs@MIPs displayed excellent fluorescence properties, high photostability, and strong selectivity for streptomycin through a fluorescence enhancement mechanism. Under optimized conditions, the sensor achieved a low detection limit of 3.2 nM (1.8 ppb) and a wide linear range from 0.01 to 8.00 μM. It also exhibited high selectivity against structurally similar antibiotics and common interfering ions. The method was successfully applied to pharmaceutical and environmental water samples, yielding results consistent with LC-MS/MS. These findings highlight the potential of the developed sensor as a rapid, sensitive, and eco-friendly tool for streptomycin detection in complex matrices.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"343 ","pages":"Article 126622"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535741","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}

引用次数: 0

Modulating exciton transfer pathways via oxidation and n-π* transitions for efficient room-temperature phosphorescence 通过氧化和n-π*跃迁调制激子转移途径，实现高效的室温磷光

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-30 DOI: 10.1016/j.saa.2025.126625

Huanling Liu , Yan Wang , Songsong Liu , Lili Lin , Yuzhi Song , Chuan-Kui Wang , Zhen Xie , Jianzhong Fan

{"title":"Modulating exciton transfer pathways via oxidation and n-π* transitions for efficient room-temperature phosphorescence","authors":"Huanling Liu , Yan Wang , Songsong Liu , Lili Lin , Yuzhi Song , Chuan-Kui Wang , Zhen Xie , Jianzhong Fan","doi":"10.1016/j.saa.2025.126625","DOIUrl":"10.1016/j.saa.2025.126625","url":null,"abstract":"<div><div>Organic room-temperature phosphorescence (RTP) materials hold promising applications in the field of display technologies and information encryption. Achieving efficient RTP emission relies on precisely regulating excited-state properties and luminescence pathways. In this study, three experimentally reported donor-acceptor molecules are selected, and the effects of oxidation on their photophysical properties are systematically investigated by first-principles calculations. The results show that oxidation of the donor units effectively modulates intramolecular charge transfer characteristics and the excited state energy levels, thereby influencing the reverse intersystem crossing (RISC) and exciton transfer processes, related thermally activated delayed fluorescence (TADF) and RTP emission mechanisms are revealed. Among the studied molecules, the fully oxidized molecule DOPTZ-CO exhibits the most favorable RTP performance. Using DOPTZ as the oxidized donor, three molecules featuring pronounced n-π* transition characteristics are further designed, and a novel strategy is proposed to regulate emission pathways by incorporating non-bonding (n) orbitals. The introduction of n-π* transition is found to play a dual role: it enhances spin-orbit coupling (SOC) effect, facilitating radiative T<sub>1</sub>-S<sub>0</sub> transitions and it also increases the S<sub>1</sub>-T<sub>1</sub> energy gap (ΔE<sub>ST</sub>), thereby suppressing RISC process and favoring RTP-dominated emission. Thus, molecules with moderate ΔE<sub>ST</sub> values (approximately 0.4 eV) and strong n-π* character demonstrate efficient and controllable RTP behavior. Overall, this study underscores the critical role of excited-state modulation and orbital engineering in tuning emission pathways and provides a theoretical foundation for the rational design of high-performance organic RTP materials.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"343 ","pages":"Article 126625"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144535743","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}

引用次数: 0

Methyl-free meso-thiazole-substituted red-shifted BODIPY-based molecular rotor for fluorescence imaging viscosity in mitochondria 无甲基间噻唑取代红移bodipy分子转子用于线粒体荧光成像粘度

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-30 DOI: 10.1016/j.saa.2025.126626

Ri-Hui Deng , Ting Fan , Wen-Jing Shi , Yingmei Cao , Yue Xie , He Cai , Zi-Jian Huo , Jin-wu Yan , Li Niu

{"title":"Methyl-free meso-thiazole-substituted red-shifted BODIPY-based molecular rotor for fluorescence imaging viscosity in mitochondria","authors":"Ri-Hui Deng , Ting Fan , Wen-Jing Shi , Yingmei Cao , Yue Xie , He Cai , Zi-Jian Huo , Jin-wu Yan , Li Niu","doi":"10.1016/j.saa.2025.126626","DOIUrl":"10.1016/j.saa.2025.126626","url":null,"abstract":"<div><div>Molecular fluorescent rotors based on boron dipyrromethenes (BODIPYs) were intensively explored for monitoring the environmental viscosity variations, due to its critical functions in many associated diseases. Although various strategies have been used, red-shifted BODIPY-based fluorescent rotors with large Stokes shifts through one-step reaction remain a challenging topic due to the tedious synthetic procedures. In this manuscript, for the first time, through one-step reaction, 1,7-dimethyl-free <em>meso</em>-thiazole/benzothiazole BODIPYs were used to construct red-shifted fluorescent rotors with large Stokes shifts, which could be used for monitoring cellular viscosity changes with mitochondrial localization. This strategy-designed 1,7-dimethyl-free <em>meso</em>-thiazole/benzothiazole BODIPYs could be prepared through one-step reaction, giving emissions over 600 nm and large Stokes shifts of about 70 nm. Both <em>meso</em>-thiazole probe <strong>3</strong> and <em>meso</em>-benzothiazole probe <strong>5</strong> could sense the viscosity changes through fluorescence turn-on effects with low detection limits, depending on efficiently restricting the rotation of the <em>meso</em>-thiazole in viscous systems. Cellular experiments further validated that probe <strong>3</strong> showed nearly no cytotoxicity towards HeLa cell and relatively good mitochondria-targeting ability over lysosomes, which was further employed to detect intracellular viscosity variations induced by lipopolysaccharide (LPS) and monensin. Therefore, red-shifted 1,7-dimethyl-free <em>meso</em>-thiazole BODPY-based fluorescent probe through one-step reaction could serve as sensitive molecular rotors for visualizing viscosity variations in mitochondria of HeLa cells.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"343 ","pages":"Article 126626"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549458","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}

引用次数: 0

Eco-friendly synthesis of a silver nanohybrid with carbon dots derived from Quebracho Colorado leaves and its application in the colorimetric detection of Al3+ 绿色环保的玉米叶碳点银杂化材料的合成及其在Al3+比色检测中的应用

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-30 DOI: 10.1016/j.saa.2025.126628

Martín F. Montenegro , Jesús M.N. Morales , Faustino E. Morán Vieyra , Claudio D. Borsarelli

{"title":"Eco-friendly synthesis of a silver nanohybrid with carbon dots derived from Quebracho Colorado leaves and its application in the colorimetric detection of Al3+","authors":"Martín F. Montenegro , Jesús M.N. Morales , Faustino E. Morán Vieyra , Claudio D. Borsarelli","doi":"10.1016/j.saa.2025.126628","DOIUrl":"10.1016/j.saa.2025.126628","url":null,"abstract":"<div><div>The <em>Schinopsis lorentzii</em> tree leaves were utilized for the first time in the production of carbon dots (CDs) with a diameter of 6 nm through hydrothermal carbonization at 200 °C. The heating of AgNO<sub>3</sub> aqueous solutions up to 70 °C in the presence of CDs results in the formation of silver nanohybrids (AgNP@CDs), with a zeta potential of −48 mV, a diameter of 33 nm, and a surface plasmon resonance (SPR) absorption band centered at 440 nm<strong>.</strong> Among the various cations examined, only the incorporation of Al<sup>3+</sup> in the AgNP@CDs solution induced a color shift from yellow to brown, leading to the formation of colloidal aggregates with an approximate diameter of 550 nm. The formation of AgNP@CDs nanohybrids and aggregates in the absence and presence of Al<sup>3+</sup>, respectively, was modeled by combining UV–vis absorption spectra with multivariate curve resolution-alternating least squares (MCR-ALS) analysis. For the AgNP@CDs, a sequential nucleation-aggregation mechanism was observed, with a global activation energy of 28 kJ/mol. In the presence of Al<sup>3+</sup>, a four-species sequential mechanism describes the progressive formation of larger aggregates, with dose-response curves that are characteristic of highly cooperative binding equilibriums with an average global binding constant of 7 × 10<sup>4</sup> M<sup>−1</sup>. The analytical performance of the AgNP@CDs resulted in a sensitivity of 0.03 μM, a linear range between 10 and 20 μM, and a limit of detection of 3.5 μM. These parameters are consistent with those previously reported for the colorimetric determination of Al<sup>3+</sup> using AgNPs capped with different molecules.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"343 ","pages":"Article 126628"},"PeriodicalIF":4.3,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549526","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}

引用次数: 0

A turn-on supramolecular probe for visible detection and accurate identification of phenethylamine with orange emission 一种用于苯乙胺可见光检测和准确鉴定的橙色发射的开启超分子探针

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-28 DOI: 10.1016/j.saa.2025.126555

Yuan-xia Li , Jun-lan Wang , Cheng-hui Wang, Xin Xiao

引用次数: 0

A novel supramolecular zinc porphyrin thin film coated fiber optic Mach − Zehnder interferometer for trace detection of ammonia gas 一种新型超分子锌卟啉薄膜涂层光纤Mach - Zehnder干涉仪用于微量氨气检测

IF 4.3 2区化学

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-28 DOI: 10.1016/j.saa.2025.126575

Shuifeng Wang , Xinyue Huang , Ziyang Zhang , Xuemei Zhang , Qian Zhang , Jingang Xie , Wenlin Feng , Wei Wu , Xiaofeng Lei

{"title":"A novel supramolecular zinc porphyrin thin film coated fiber optic Mach − Zehnder interferometer for trace detection of ammonia gas","authors":"Shuifeng Wang , Xinyue Huang , Ziyang Zhang , Xuemei Zhang , Qian Zhang , Jingang Xie , Wenlin Feng , Wei Wu , Xiaofeng Lei","doi":"10.1016/j.saa.2025.126575","DOIUrl":"10.1016/j.saa.2025.126575","url":null,"abstract":"<div><div>A novel fiber-optic ammonia Mach-Zehnder interferometer (MZI) with an asymmetric-sensing structure was developed and experimentally validated. The sensor was fabricated through successive fusion splicing of single-mode fiber (SMF), coreless fiber (NCF), SMF, thin-core fiber (TCF), and SMF, thereby forming an SMF-NCF-SMF-TCF-SMF interferometric structure. Experimental and simulation results demonstrated that the sensor exhibited a linear response within the refractive index range of 1.3320–1.3636. Using the layer-by-layer (LbL) self-assembly technique, ultrathin two-dimensional (2D) self-assembled tetrakis(4-carboxyphenyl) zinc porphyrin (SA-ZnTCPP) and zinc acetate (Zn(OAc)<sub>2</sub>) nanoporous films were deposited onto the fiber sensing region. The structural, morphological, and compositional properties of the nanomaterials and films were analyzed via Fourier-transform infrared (FT-IR) spectroscopy, ultraviolet–visible (UV–Vis) absorption spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). NH<sub>3</sub> adsorption by the thin film modifies the sensor’s effective refractive index, enabling gas detection. Experimental results revealed that the interference intensity of the monitoring peak increased proportionally with NH<sub>3</sub> concentration. Within the 0–600 ppb range, the sensor demonstrated high sensitivity (7.12 dB/ppm) and linearity, achieving a detection limit of 2 ppm with response-recovery times of 40 s and 50 s, respectively. The sensor demonstrates notable advantages, including high sensitivity, excellent selectivity, straightforward design, and ultra-low detection limits, indicating strong potential for toxic NH<sub>3</sub> monitoring in chemical engineering and industrial applications.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"343 ","pages":"Article 126575"},"PeriodicalIF":4.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549457","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}

引用次数: 0