Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy最新文献_第9页

Evolution of large stokes shift and non-radiative energy transfer phenomenon in sustainable blue-fluorescent CQDs upon subnanomolar detection of Acebrophylline. 可持续蓝色荧光 CQDs 在亚纳摩尔浓度下检测乙溴菲啉时发生大stokes位移和非辐射能量转移现象。

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-10 DOI: 10.1016/j.saa.2024.125559

Saranya Devi Mudisoodum Perumal, Daniel Thangadurai Thangaian, Manjubaashini Nandhakumar, Nataraj Devaraj, Naveen Kumar Kalagatur

{"title":"Evolution of large stokes shift and non-radiative energy transfer phenomenon in sustainable blue-fluorescent CQDs upon subnanomolar detection of Acebrophylline.","authors":"Saranya Devi Mudisoodum Perumal, Daniel Thangadurai Thangaian, Manjubaashini Nandhakumar, Nataraj Devaraj, Naveen Kumar Kalagatur","doi":"10.1016/j.saa.2024.125559","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125559","url":null,"abstract":"Carbon quantum dots (CQDs) have emerged as powerful fluorescent sensors for identifying harmful compounds in environmental and biological samples, due to their robust and adjustable emission characteristics. In this study, we explore CQDs (size ∼ 3 nm), as a probe, derived from Walnut Shell (WS) biomass waste for detecting Acebrophylline (AB), a respiratory disease medicine. From the selectivity studies, the calculated energy transfer between the CQDs (10 mM; donor) and AB (10 mM; acceptor) was found to be 64 %, attributed to the formation of a ground state complex, CQDs + AB. The CQDs demonstrated high selectivity and sensitivity to AB in concentrations between 1-100 μM with a detection limit of 0.142 nM (R2 = 0.991, Ka = 1.39194 × 10-3 M-1). Time-correlated single-photon counting (TCSPC) experiments validated the static quenching of CQDs (3.46 → 3.71 ns) when exposed to AB. The proposed detection method was successfully applied for detecting AB in human urine samples with a good recovery percentage (81 to 123 %; RSD ca. 1 %). After AB sensing, changes in the CQDs' crystalline nature, elemental composition, and chemical state were examined using XRD, XPS, and FTIR spectroscopy. Microscopy imaging techniques (FESEM, HRTEM, and AFM) confirmed morphological changes of CQDs from spherical to agglomerated with an average diameter of approximately 14 nm. Additionally, the impact of time, pH, and interferons on AB sensing was investigated. In vitro anti-inflammatory activity and in vivo bioimaging studies on zebrafish were also performed. This study highlights several advantages, including a cost-effective and eco-friendly approach for healthcare applications.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125559"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raman spectroscopic investigation of phase changes and reactivity of 1-pentadecene under high-pressure and high-temperature conditions.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-10 DOI: 10.1016/j.saa.2024.125580

Ayako Shinozaki, Masaya Nakanishi, Jun Kawano, Takaya Nagai

{"title":"Raman spectroscopic investigation of phase changes and reactivity of 1-pentadecene under high-pressure and high-temperature conditions.","authors":"Ayako Shinozaki, Masaya Nakanishi, Jun Kawano, Takaya Nagai","doi":"10.1016/j.saa.2024.125580","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125580","url":null,"abstract":"The phase changes and reactivity of 1-pentadecene (C15H30) were investigated using Raman spectroscopy under high-pressure and high-temperature conditions using diamond anvil cells. At room temperature, the phase changes from liquid phase to solid phase I, and solid phase I to solid phase II were observed at 0.3 GPa and 4.1 GPa, respectively. Another phase change to form phase III progressed at approximately 10 GPa, and a partial irreversible chemical reaction was observed after decompression from 15.7 GPa. Under high-pressure and high-temperature conditions, the irreversible chemical reaction extensively progressed from the solid phase at 180°C, 1.8 GPa, and at 210 °C, 5.4 GPa. The selective reduction of the Raman peak intensities corresponding to sp2 carbon indicated the progression of an addition reaction similar to that observed in the 1-hexene reaction. A new CC stretching mode appeared, which was attributed to the non-terminal CC bond and was more evident at higher pressures. As the chemical reaction progressed from the liquid phase, a gradual reduction of the CC stretching mode peak was observed upon increasing the temperature at approximately 1.0 GPa, indicating the occurrence of a partial chemical reaction.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125580"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142866699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative method for provenance studies in cultural heritage: A new algorithm based on observables from high-resolution Raman spectra of red ochre.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-10 DOI: 10.1016/j.saa.2024.125581

Francesca Assunta Pisu, Stefania Porcu, Raffaela Carboni, Valentina Mameli, Carla Cannas, Stefano Naitza, Rita Teresa Melis, Margherita Mussi, Daniele Chiriu

{"title":"Innovative method for provenance studies in cultural heritage: A new algorithm based on observables from high-resolution Raman spectra of red ochre.","authors":"Francesca Assunta Pisu, Stefania Porcu, Raffaela Carboni, Valentina Mameli, Carla Cannas, Stefano Naitza, Rita Teresa Melis, Margherita Mussi, Daniele Chiriu","doi":"10.1016/j.saa.2024.125581","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125581","url":null,"abstract":"Red ochre, typically derived from iron oxides and hematite, has been used since Pleistocene times for a range of different applications, practical as well as symbolic, including cave paintings and use in prehistoric burials. The importance to discover new methods for provenance determination, based on non-destructive portable techniques, represents a new challenge in the field of diagnostics of cultural heritage. This study presents the data obtained from the analysis of several non-flaked tools and ochre-stained bones, showing evidence of ochre processing at the Mesolithic site of S'omu e S'Orku in Sardinia (Italy). To investigate the provenance of the ochre (hematite phase) found on a massive stone from the site and also used to cover the bones, we propose three distinct approaches derived from high-resolution Raman spectra of ochres, aiming to identify the maximum number of observables that can be reconducted to unicity criteria. The reliability of this method enables the development of an automatic algorithm of Artificial Intelligence able to recognize the provenance of raw materials used in a range of activities. Furthermore, this study sheds light on one of the earliest and most distinctive Mesolithic burials uncovered in Sardinia to date, providing valuable insights into the human colonization of the island and the symbolic practices of its inhabitants during the Holocene epoch.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125581"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of novel dual-emitting ratiometric fluorescence system based on FMT-CDs and MnO₂ NS for sensitive isoniazid detection in urine sample. 设计基于 FMT-CDs 和 MnO2 NS 的新型双发射比率荧光系统，用于尿样中异烟肼的灵敏检测。

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-10 DOI: 10.1016/j.saa.2024.125586

Xin-Ran Guo, Yan-Xin Guo, Juan Chen, Xin-Yue Chen

{"title":"Design of novel dual-emitting ratiometric fluorescence system based on FMT-CDs and MnO2 NS for sensitive isoniazid detection in urine sample.","authors":"Xin-Ran Guo, Yan-Xin Guo, Juan Chen, Xin-Yue Chen","doi":"10.1016/j.saa.2024.125586","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125586","url":null,"abstract":"In this work, a simple and sensitive ratiometric fluorescence probe to detect isoniazid (INH) was developed on the basis of carbon dots and MnO2 nanosheets (MnO2 NS). Nitrogen-doped carbon dots (FMT-CDs) were synthesized by microwave method using formononetin (FMT) in ammonia water. The oxidase-like activity of MnO2 NS was utilized to oxidize non-fluorescent o-phenylenediamine (OPD) to 2, 3-diaminophenazine (DAP) with orange fluorescence. It was demonstrated that DAP could effectively quench the fluorescence of FMT-CDs through the inner filtering effect (IFE). Due to the reducing nature of INH, MnO2 NS was decomposed and thus lost its oxidase-like activity after the addition of INH. Therefore, the production of DAP was reduced, and the fluorescence intensity was decreased, while IFE on FMT-CDs was weakened and the fluorescence of FMT-CDs was recovered. Based on the above principle, a sensitive method for the detection of INH was established based on the fluorescence intensity ratio of the two fluorescent substances, FMT-CDs and DAP, and was successfully applied to the detection of INH in human urine samples. The limit of detection (LOD) could reach to 0.16 μM in human urine samples.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125586"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A smartphone-based fluorescent sensing system for simultaneous visual detection of chromium(Ⅲ) and copper(Ⅱ) ions. 基于智能手机的荧光传感系统，用于同时目视检测铬（Ⅲ）和铜（Ⅱ）离子。

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125573

Runpeng Dong, Fangkai Du, Yanzhen Sun, Jinli Lin

{"title":"A smartphone-based fluorescent sensing system for simultaneous visual detection of chromium(Ⅲ) and copper(Ⅱ) ions.","authors":"Runpeng Dong, Fangkai Du, Yanzhen Sun, Jinli Lin","doi":"10.1016/j.saa.2024.125573","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125573","url":null,"abstract":"In this work, we developed a highly accurate and sensitive two-emission fluorescence sensor, integrated with a smartphone, for the rapid detection of Cu2+ and Cr3+ in aqueous solution. This sensor comprised AgInS/ZnS quantum dots (AIS/ZnS QDs) and metal-AIEgen frameworks (MAFs). Upon mixing in a specific ratio, the hybrid system can emit a white light when exposed to a UV lamp (365 nm). The system demonstrates distinct fluorescence variations upon interaction with Cr3+ or Cu2+. Specifically, the sensor transitions from white to red or blue when exposed to Cr3+ or Cu2+, respectively. By utilizing smartphone color recognition software to measure the ratio of red to blue (R/B) value of the solution, the detection ranges of the dual response sensor for Cr3+ and Cu2+ are established at 250-5000 nM and 100-2500 nM, with detection limits of 168.4 nM and 101.1 nM, respectively. The practicality of the sensor is validated through quantitative measurement of RGB values from real water samples, including drinking water, tap water, and lake water. Consequently, this sensor exhibits significant potential for point-of-care detection, attributable to its low cost, portability, and high specificity and sensitivity.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125573"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A selenium-based fluorescent sensor for the reversible detection of ClO^- and H₂S in foods. 用于可逆检测食品中 ClO- 和 H2S 的硒基荧光传感器。

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125570

Siyi Shen, Maozhong Tian, Wenhui Xia, Jinping Song, Yuzhen Wang, Jiyuan Wei, Xiaohui Wang, Yuehua Yuan, Feng Feng

{"title":"A selenium-based fluorescent sensor for the reversible detection of ClO- and H2S in foods.","authors":"Siyi Shen, Maozhong Tian, Wenhui Xia, Jinping Song, Yuzhen Wang, Jiyuan Wei, Xiaohui Wang, Yuehua Yuan, Feng Feng","doi":"10.1016/j.saa.2024.125570","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125570","url":null,"abstract":"HClO/ClO- and H2S are two kinds of momentous biological small molecules in the organism, and the redox balance between them is considerable for the physiological and pathological properties of organisms. Hence, it is very crucial to monitor the redox course between HClO and H2S. Herein, a reversible fluorescent sensor (IPSe) for ClO- and H2S was firstly constructed with the selenium atom as the response site and the dicyanoisophorone as the fluorophore. The sensor IPSe could detect ClO- with good selectivity and sensitivity due to the oxidation reaction of the selenium atom triggered by ClO-. The recognition of IPSe to hypochlorite induced a hypsochromic shift of the absorption maximum from 420 nm to 380 nm. IPSe exhibited the prominent low detection limit of 55.3 nM for detecting ClO-, accompanied by distinct fluorescent attenuation. Moreover, H2S could efficiently return the fluorescence of the IPSe solution to the original level by H2S reducing selenoxide. The experimental results show that the suggested method has high precision and accuracy for the detection of ClO- and H2S. The applications in real water samples, beverages and cell imaging verified that the IPSe was capable of monitoring the changes in the concentration of ClO-/H2S, which indicates that it is of great meaning to survey the biological functions of ClO- and H2S via IPSe.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125570"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A unique fluorescence metal-organic framework for ultrasensitive fluorescent and colorimetric bimodal detection of phosphate.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125571

Chan Yang, Shuo Tian, Yanling Zhao, Longcheng Yang, Liuting Mo, Weiying Lin

{"title":"A unique fluorescence metal-organic framework for ultrasensitive fluorescent and colorimetric bimodal detection of phosphate.","authors":"Chan Yang, Shuo Tian, Yanling Zhao, Longcheng Yang, Liuting Mo, Weiying Lin","doi":"10.1016/j.saa.2024.125571","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125571","url":null,"abstract":"Monitoring the concentration of phosphate is crucial for environmental protection and human health due to its severe ecological and health risks associated with elevated concentrations. Herein, a fluorescent-colorimetric bimodal nanoprobe based on the unique fluorescent metal-organic frameworks (Zr-PDI) has been developed for high-efficiency quantification of phosphate. The metal-oxygen coordination in Zr-PDI effectively diminished its fluorescence. However, the introduction of phosphate could weaken the metal-oxygen coordination interaction, leading to fluorescence recovery and absorption spectra changes of Zr-PDI. Taking advantage of these characteristics, Zr-PDI was exploited as a fluorescent-colorimetric bimodal detection tool for phosphate, offering excellent selectivity, a wide detection range, and high accuracy. Notably, the detection limit of fluorescence detection mode was as low as 0.023 μM, enabling ultrasensitive detection of phosphate. Furthermore, the Zr-PDI-based nanoprobe has achieved sensitive and reliable quantification of phosphate in Yong River and diabetic mouse serum samples. This proposed strategy provides a powerful, convenient, and practical tool for detecting phosphate in environmental and biological samples.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125571"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional tracking of organ development in live plants based on plasma membrane dyes at single-cell resolution.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125575

Xin Peng, Junjun Pan, Zhengdong Han, Penglei Wu, Ziqing He, Hui Feng, Weidong Liu, Kewei Zhang, Engao Zhu, Zhaosheng Qian

{"title":"Three-dimensional tracking of organ development in live plants based on plasma membrane dyes at single-cell resolution.","authors":"Xin Peng, Junjun Pan, Zhengdong Han, Penglei Wu, Ziqing He, Hui Feng, Weidong Liu, Kewei Zhang, Engao Zhu, Zhaosheng Qian","doi":"10.1016/j.saa.2024.125575","DOIUrl":"https://doi.org/10.1016/j.saa.2024.125575","url":null,"abstract":"Plant developmental biology necessitates precise three-dimensional (3D) tracking of dynamic processes in live plants, and the 3D imaging technique in developmental bioimaging requires suitable fluorophores to achieve single-cell resolution imaging. Herein, we have designed a series of plasma membrane fluorescent dyes with a number of excellent properties and established a single-cell resolution imaging tool based on these dyes for three-dimensional imaging of various tissues and organs in living plants. The designed plasma membrane fluorescent dyes not only have the advantages of rapid wash-free staining, highly specific targeting, high brightness and high contrast imaging, ultralong imaging time and low biotoxicity, but also effectively avoid the autofluorescence interference of chlorophyll in cells, allowing for the development of a three-dimensional imaging approach of living plant organs with single-cell resolution. The three-dimensional histological structures of various organs of adult Arabidopsis thaliana, including roots, leaves, flowers, and fruits, were successfully reconstructed with single-cell resolution using this model plant. Furthermore, the 3D imaging method was employed to track the dynamic changes in tissue and organ morphology at the single-cell level during key plant developmental processes, including seed germination, root development, leaf growth, and anther development.","PeriodicalId":94213,"journal":{"name":"Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy","volume":"329 ","pages":"125575"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 fluorescent probe for imaging of hydroxyl radicals in drug-induced liver injury.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125569

Mengshan Yu, Hanyue Xiang, Ayijiang Taledaohan, Wenzhuo Fu, Hongyu Li, Yuji Wang, Nao Xiao

引用次数: 0

Red emitting fluorescence sensor based on Eu-tungstate complex for the detection of bilirubin in biological fluid.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2024-12-09 DOI: 10.1016/j.saa.2024.125572

Ali Ibrahim Shkhair, Anju S Madanan, Susan Varghese, Merin K Abraham, Geneva Indongo, Greeshma Rajeevan, B K Arathy, Sara Muneer Abbas, Sony George

引用次数: 0