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Journal of Applied Spectroscopy最新文献

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Atomic Frequency Reference Based on 4S1/2−4P1/2 Transitions in Potassium Vapor Placed in a Nanocell 基于纳米电池中钾蒸气4S1/2−4P1/2跃迁的原子频率参考
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02111-3
A. Sargsyan
{"title":"Atomic Frequency Reference Based on 4S1/2−4P1/2 Transitions in Potassium Vapor Placed in a Nanocell","authors":"A. Sargsyan","doi":"10.1007/s10812-026-02111-3","DOIUrl":"10.1007/s10812-026-02111-3","url":null,"abstract":"<p>Sub-Doppler resonances formed by scanning the laser frequency in the region of the 4<i>S</i><sub>1/2</sub> → 4<i>P</i><sub>1/2</sub> transition at a wavelength of 770 nm in K atomic vapors placed in a nanocell were studied. Sub-Doppler resonances located at the unshifted atomic transitions F<sub>g</sub> = 1, 2 → F<sub>e</sub> = 1, 2 were formed in the transmission spectrum for atomic vapor thicknesses L = λ/2 = 385 nm and L = λ = 770 nm. The resonance amplitudes observed in the nanocell were proportional to the probability amplitudes of the corresponding transitions. It is shown that a nanocell with a vapor thickness L = λ = 770 nm could be used as a convenient frequency reference tied to the unshifted frequencies of the atomic transitions. The advantages of the proposed frequency reference over a commonly used frequency reference based on saturated absorption techniques were demonstrated.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"259 - 263"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Ciprofloxacin Quantification with Nuclear Magnetic Resonance Spectroscopy in a Deuterium-Free Environment 无氘环境下核磁共振光谱法定量环丙沙星
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02129-7
Muhammad Azam, Ataf Ali Altaf, Muhammad Hamayun
{"title":"Ciprofloxacin Quantification with Nuclear Magnetic Resonance Spectroscopy in a Deuterium-Free Environment","authors":"Muhammad Azam,&nbsp;Ataf Ali Altaf,&nbsp;Muhammad Hamayun","doi":"10.1007/s10812-026-02129-7","DOIUrl":"10.1007/s10812-026-02129-7","url":null,"abstract":"<p>The quantitative nuclear magnetic resonance (qNMR) method of quantifying the content of pharmaceuticals is an important and growing science in the current era. The deuterium-based solvents contribute to the main costs of the NMR-based analysis. In this study, we introduced the use of deuterium-free solvent (i.e., water H<sub>2</sub>O) for the quantification of ciprofloxacin (CIP) using the qNMR method. <i>p</i>-Nitrophenol (PNP) was used as an internal standard to solve the absolute integration of signals in NMR spectra. Quantification results were compared with literaturereported high-performance liquid chromatographic (HPLC) methods and analyzed by analysis of variance (ANOVA). The ANOVA results show that the regression model is highly significant (<i>F</i> = 37515.62, <i>p</i> &lt; 0.001), indicating that the actual quantity of the analyte is a powerful predictor of the quantized concentration. An ANOVA study demonstrated that using simple water as a solvent in the qNMR method is as effective as the HPLC method for the quantitative analysis of CIP. The investigated method accurately compensated for the deficiencies of the current HPLC method for quantitative measurement of CIP, and the use of PNP overcame the problem of absolute integration of signals associated with NMR spectra.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"386 - 392"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Hydrothermal Synthesis of CuS Nanoparticles with Tunable Structural and Optical Properties 水热合成具有可调结构和光学性质的cu纳米颗粒
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02135-9
D. Bhargava, P. Jayaprada, G. Giridhar, M. C. Rao, Ch.R. S. Kumar, B. Das, R. K. N. R. Manepalli
{"title":"Hydrothermal Synthesis of CuS Nanoparticles with Tunable Structural and Optical Properties","authors":"D. Bhargava,&nbsp;P. Jayaprada,&nbsp;G. Giridhar,&nbsp;M. C. Rao,&nbsp;Ch.R. S. Kumar,&nbsp;B. Das,&nbsp;R. K. N. R. Manepalli","doi":"10.1007/s10812-026-02135-9","DOIUrl":"10.1007/s10812-026-02135-9","url":null,"abstract":"<p>This research presents the successful synthesis of copper sulfide (CuS) nanoparticles (NPs) through a controlled hydrothermal synthesis approach. Complete material characterization is performed using multiple analytical techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, UV-visible diffuse reflectance spectroscopy, differential thermal analysis, and photoluminescence measurements. SEM indicated the presence of NPs, and energy-dispersive X-ray spectroscopy data confirmed the existence of sulfur and copper elements as primary constituents of the synthesized materials. Crystallographic investigation through XRD provided detailed structural information, with an average particle size of 18.07 nm. The sample confirms a hexagonal crystal framework with 12-fold coordination geometry. CuS nanostructures displayed characteristic optical absorption behavior in the ultraviolet spectrum, with notable absorption features spanning a 150–500 nm wavelength range, revealing a calculated optical bandgap of 2.19 eV. Photoluminescence analysis shows emission at a 503-nm wavelength, indicating characteristic blue emission in the synthesized materials. Thermal characterization showed a material stability across the 300–400°C temperature range, with exothermic behavior occurring at 342°C, complemented by heat release of 50.5 μV.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"434 - 440"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Low-Cost Synthesis of Zinc-Doped SnO2 Films for Optoelectronic Applications 用于光电应用的锌掺杂SnO2薄膜的低成本合成
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02134-w
Vipin Kumar, Soniya Juneja, Akansha Agrwal, Priyanka Rai, Parvin Kumar, Abhishek Sharma, D. K. Dwivedi, N. P. Yadav, Monika Gupta, Pradeep Kumar, R. A. Zargar
{"title":"Low-Cost Synthesis of Zinc-Doped SnO2 Films for Optoelectronic Applications","authors":"Vipin Kumar,&nbsp;Soniya Juneja,&nbsp;Akansha Agrwal,&nbsp;Priyanka Rai,&nbsp;Parvin Kumar,&nbsp;Abhishek Sharma,&nbsp;D. K. Dwivedi,&nbsp;N. P. Yadav,&nbsp;Monika Gupta,&nbsp;Pradeep Kumar,&nbsp;R. A. Zargar","doi":"10.1007/s10812-026-02134-w","DOIUrl":"10.1007/s10812-026-02134-w","url":null,"abstract":"<p>Tin oxide, a distinguished metal oxide suitable for optoelectronic usage, has features that can be easily enhanced through doping. In the current study, films of zinc-doped SnO<sub>2</sub> (Zn/Sn = 0.03) were synthesized via the sol-gel screen-printing strategy and subsequently sintered at 450°C for 10 min. X-ray diffraction findings established the polycrystalline characteristics and single-phase tetragonal configuration of the synthesized films. The occurrence of Sn, O, and Zn ions is evidenced by energy-dispersive X-ray analysis. According to UV-Vis analysis, the band gap energy (direct transition) was found to be 3.62 eV. Hall measurement analysis revealed the n-type conductivity of the films, characterized by a resistivity of 1.03 × 10<sup>–3</sup> Ω∙cm.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"430 - 433"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Ellipsometric Study of the Optical Properties of Polycrystalline Lutetium 多晶镥光学性质的椭偏研究
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02117-x
L. A. Akashev, N. A. Popov, V. G. Shevchenko, E. V. Spesivtsev
{"title":"Ellipsometric Study of the Optical Properties of Polycrystalline Lutetium","authors":"L. A. Akashev,&nbsp;N. A. Popov,&nbsp;V. G. Shevchenko,&nbsp;E. V. Spesivtsev","doi":"10.1007/s10812-026-02117-x","DOIUrl":"10.1007/s10812-026-02117-x","url":null,"abstract":"<p>The optical properties of polycrystalline lutetium were studied at room temperature. The optical constants were measured by the ellipsometric method using a SPEL-7LED spectral ellipsometer (manufactured in Russia) in the range from 277 to 1000 nm. The measured values of the refractive index were used to calculate the dispersion dependence of the optical conductivity α, reflectance R, as well as the real (ε<sub>1</sub>) and imaginary parts of the dielectric constant (ε<sub>2</sub>) along with the electron loss function Im (ε)<sup>–1</sup>. The interband electron transitions were found to have a significant effect on the optical properties of solid lutetium. Two absorption bands associated with interband transitions are seen in the optical conductivity spectra with photon energy maxima of 1.86 and 3.11 eV.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"301 - 305"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Determination of the Amount of Graphene in a Polymorphic Multi-component Carbon Mixture by Optical Characteristics in the CIELAB Colorimetric System 用CIELAB比色系统的光学特性测定多组分碳混合物中石墨烯的含量
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02118-w
M. Yu. Dolomatov, D. A. Levashov, V. R. Subkhankulov, M. M. Dolomatova, S. S. Vershinin, K. G. Abdulminev
{"title":"Determination of the Amount of Graphene in a Polymorphic Multi-component Carbon Mixture by Optical Characteristics in the CIELAB Colorimetric System","authors":"M. Yu. Dolomatov,&nbsp;D. A. Levashov,&nbsp;V. R. Subkhankulov,&nbsp;M. M. Dolomatova,&nbsp;S. S. Vershinin,&nbsp;K. G. Abdulminev","doi":"10.1007/s10812-026-02118-w","DOIUrl":"10.1007/s10812-026-02118-w","url":null,"abstract":"<p>The disadvantage of existing methods for quantitative determination of graphene content is their limited application for the analysis of multicomponent polymorphic mixtures including solid amorphous, graphite, and graphene phases. The possibility of quantitative determination of the amount of graphene in a mixture of amorphous carbon species using color lightness in the CIELAB system was researched. Samples of chemically exfoliated graphene mixed with amorphous carbon were used. It was found that the amount of graphene was linearly related to color lightness of the mixture in the CIELAB system. The discovered relationships were tested on model mixtures and confirmed by statistical data processing. Practical use of the observed effect in carbon materials technology consists of the possibility of estimating the graphene content in mixtures containing other carbon modifications.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"306 - 310"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Perylene-Based Turn-Off Fluorescent Probe for Tetracycline Antibiotics Detection with Gold Nanoparticles 基于苝的四环素类抗生素关闭荧光探针的金纳米颗粒检测
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02133-x
Y. X. Wu, Q. Wang, T. D. Rao, M. Y. Huang, L. J. Liang, H. C. Li
{"title":"Perylene-Based Turn-Off Fluorescent Probe for Tetracycline Antibiotics Detection with Gold Nanoparticles","authors":"Y. X. Wu,&nbsp;Q. Wang,&nbsp;T. D. Rao,&nbsp;M. Y. Huang,&nbsp;L. J. Liang,&nbsp;H. C. Li","doi":"10.1007/s10812-026-02133-x","DOIUrl":"10.1007/s10812-026-02133-x","url":null,"abstract":"<p>A perylene-based turn-off fluorescent strategy for tetracycline antibiotics (TCs) detection has been established with gold nanoparticles. TCs directly participate in the reduction of chloroauric acid to generate gold atoms, which subsequently nucleate and assemble into gold nanoparticles (TCs–AuNPs). Because of the overlap between the absorption of TCs–AuNPs and the fluorescence emission of the perylene probe (PDI), the inner filter effect (IFE)-based fluorescence turn-off assay was successfully established. Consequently, the fluorescence peaks of the PDI at 550 and 591 nm were quenched by TC–AuNPs via the IFE process. The assay method shows high sensitivity with a limit of detection of 2.4 mM, and remarkable selectivity against common interfering substances. The turn-off fluorescence sensing method is fairly simple, fast, and inexpensive, and it has also been successfully used for real water sample analysis. Consequently, a highly sensitive and selective method for the detection of TC via a fluorescent turn-off mechanism based on the IFE between the PDI probe and TC–AuNPs in aqueous media was successfully established.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"420 - 429"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Spectral and Luminescence Properties of Alkaline Earth Thiogallate Crystals CaGa2S4:Tm,Yb AT Room Temperature 碱土硫代没食子酸盐晶体CaGa2S4:Tm，Yb的室温光谱和发光特性
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02115-z
P. P. Pershukevich, O. B. Tagiev, I. B. Bakhtiyarli, T. Sh. Ibragimova, F. A. Kazimova, M. V. Belkov, E. V. Lutsenko, E. V. Muravitskaya, V. N. Pavlovskii, G. P. Yablonskii
{"title":"Spectral and Luminescence Properties of Alkaline Earth Thiogallate Crystals CaGa2S4:Tm,Yb AT Room Temperature","authors":"P. P. Pershukevich,&nbsp;O. B. Tagiev,&nbsp;I. B. Bakhtiyarli,&nbsp;T. Sh. Ibragimova,&nbsp;F. A. Kazimova,&nbsp;M. V. Belkov,&nbsp;E. V. Lutsenko,&nbsp;E. V. Muravitskaya,&nbsp;V. N. Pavlovskii,&nbsp;G. P. Yablonskii","doi":"10.1007/s10812-026-02115-z","DOIUrl":"10.1007/s10812-026-02115-z","url":null,"abstract":"<p>The photoluminescence (PL) spectra and PL excitation (PLE) spectra of microcrystalline powders of two thiogallates, CaGa<sub>2</sub>S<sub>4</sub>:5%Tm,5%Yb and CaGa<sub>2</sub>S<sub>4</sub>:5%Tm, were studied at room temperature. The PLE spectra were measured in the wavelength range from 240 to 850 nm and the PL spectra were measured in the range 400–2100 nm with excitation in the UV and violet-blue spectral regions. Microcrystalline gadolinium oxychloride powder GaOCl:5%Tm, containing thulium ions in the trivalent state (Tm<sup>3+</sup>) was used as a sample for the comparison of properties. These thiogallates were found to contain thulium ions in both di- and trivalent states (Tm<sup>2+</sup> and Tm<sup>3+</sup>). The absorption of excitation energy by the CaGa<sub>2</sub>S<sub>4</sub>:5%Tm crystal is attributed predominantly to the 4f–5d transition of the Tm<sup>2+</sup> ion, while in CaGa<sub>2</sub>S<sub>4</sub>:5%Tm,5%Yb, the absorption is also attributed to the formation of charge transfer states with transfer from CaGa<sub>2</sub>S<sub>4</sub> ligand atoms to Yb<sup>3+</sup> ions. The photoluminescence efficiency in CaGa<sub>2</sub>S<sub>4</sub>:5%Tm crystals coactivated by Yb<sup>3+</sup> ions was found to be many times greater than in the non-coactivated crystals, while the effective excitation range extends to 530 nm.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"286 - 293"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148666949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Shifts of Luminescence Spectra of Radiation-induced Color Centers in Nanocrystals of Sodium, Magnesium and Lithium Fluorides 氟化钠、镁和锂纳米晶体辐射诱导色心发光光谱的偏移
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02116-y
A. P. Voitovich, A. N. Novikov, P. P. Pershukevich
{"title":"Shifts of Luminescence Spectra of Radiation-induced Color Centers in Nanocrystals of Sodium, Magnesium and Lithium Fluorides","authors":"A. P. Voitovich,&nbsp;A. N. Novikov,&nbsp;P. P. Pershukevich","doi":"10.1007/s10812-026-02116-y","DOIUrl":"10.1007/s10812-026-02116-y","url":null,"abstract":"<p>Changes in the luminescence and luminescence excitation spectra of near-cluster radiation-induced color centers in nanocrystals of sodium, magnesium, and lithium fluorides are examined relative to the size of the nanoclusters, near which these centers are located. Shifts in the luminescence bands of near-cluster centers were studied relative to change in the sample maintenance temperature before and after radiation exposure. Shifts and widths of the luminescence and luminescence excitation bands were determined after thermal annealing of the samples leading to a decrease in nanocluster size. A method for increasing the nanocluster size was developed and the effect of this increase on the spectra of the nanocrystals was studied.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"294 - 300"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Absorption and Emission Spectral Responses of a Luminescent Metal Framework Modified with a Rose Bengal-Based Sensitizer Triggered by Dipicolinate 由二吡啶酸触发的玫瑰红基敏化剂修饰的发光金属骨架的吸收和发射光谱响应
IF 0.7 4区 化学
Journal of Applied Spectroscopy Pub Date : 2026-07-21 DOI: 10.1007/s10812-026-02128-8
Wei Sun, Zhengwei Tang, Xinhua Qin
{"title":"Absorption and Emission Spectral Responses of a Luminescent Metal Framework Modified with a Rose Bengal-Based Sensitizer Triggered by Dipicolinate","authors":"Wei Sun,&nbsp;Zhengwei Tang,&nbsp;Xinhua Qin","doi":"10.1007/s10812-026-02128-8","DOIUrl":"10.1007/s10812-026-02128-8","url":null,"abstract":"<p>This work reports on a composite nanostructure for the detection of dipicolinate (DPA), using a luminescent metal-organic framework (MOF) as the supporting lattice and a Rose Bengal-derived organic dye as the sensing probe. This composite structure was characterized by X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and photophysical analyses. Two possible sensing paths were identified: colorimetric sensing based on absorption spectra and ratiometric fluorescent sensing based on emission spectra. The sensing mechanism involved a combination of the dye emission turn-on effect induced by DPA and the Eu emission turn-off effect caused by an energy transfer process. Linear sensing responses and good selectivity were observed for both sensing pathways, with a limit of detection of 2.2 μM. The advantage of this composite structure lies in its capability for naked-eye detection and the presence of two sensing pathways with linear responses.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 2","pages":"379 - 385"},"PeriodicalIF":0.7,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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