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Micrometric Atomic Layer Saturated Absorption Spectroscopy for Studying Cesium 6S1/2 → 7P3/2 Transitions at 456 nm 456 nm处铯6S1/2→7P3/2跃迁的微米原子层饱和吸收光谱研究
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01965-3
A. Sargsyan, D. Sarkisyan
{"title":"Micrometric Atomic Layer Saturated Absorption Spectroscopy for Studying Cesium 6S1/2 → 7P3/2 Transitions at 456 nm","authors":"A. Sargsyan,&nbsp;D. Sarkisyan","doi":"10.1007/s10812-025-01965-3","DOIUrl":"10.1007/s10812-025-01965-3","url":null,"abstract":"<p>Features of Doppler-free resonances formed during scanning of Cs-atom 6<i>S</i><sub>1/2</sub> → 7<i>P</i><sub>3/2</sub> transitions at 456 nm in a micrometer cell are presented. The saturated absorption technique in a cell with a thickness of <i>L</i> = 40 μm was used. The oscillator strength of these transitions is 60 times weaker than for Cs 6<i>S</i><sub>1/2</sub> → 6<i>P</i><sub>3/2</sub> transitions at 852 nm. The Doppler-free resonances have a spectral line width of &lt;20 MHz, which is 38 times smaller than the Doppler line width of 750 MHz at 120°C. These narrow resonances are of interest for both high-resolution spectroscopy and instrumentation, in particular, the creation of compact frequency references in the blue region.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"722 - 726"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135090","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
Surface Morphology, Optical Characteristics and Electrophysical Properties of Nb2O5 Films Nb2O5薄膜的表面形貌、光学特性和电物理性能
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01967-1
N. A. Bosak, P. V. Shpak, A. N. Chumakov, L. V. Baran, V. V. Malutina-Bronskaya, V. S. Drobush, A. S. Kuzmitskaya
{"title":"Surface Morphology, Optical Characteristics and Electrophysical Properties of Nb2O5 Films","authors":"N. A. Bosak,&nbsp;P. V. Shpak,&nbsp;A. N. Chumakov,&nbsp;L. V. Baran,&nbsp;V. V. Malutina-Bronskaya,&nbsp;V. S. Drobush,&nbsp;A. S. Kuzmitskaya","doi":"10.1007/s10812-025-01967-1","DOIUrl":"10.1007/s10812-025-01967-1","url":null,"abstract":"<p>Results are given for a complex study of thin Nb<sub>2</sub>O<sub>5</sub> films deposited in vacuum (<i>p</i> = 2.2 Pa) on quartz and silicon substrates using multi-pulse high-frequency laser action (<i>f</i> ~ 10–12 kHz) on a ceramic target with laser power density <i>q</i> = 81 MW/cm<sup>2</sup>. The morphology of these films was studied using atomic force microscopy. Features of the transmission spectra were presented. The photoelectrical properties of the Nb<sub>2</sub>O<sub>5</sub>/Si structure were analyzed.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"743 - 748"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135091","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
IR Spectroscopic Study of the Mechanism of Mechanostimulated Transformations of TiO2–MoO3 Heterooxide Composites TiO2-MoO3异质氧化物复合材料力学激发转化机理的红外光谱研究
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01968-0
T. V. Sviridova, A. I. Kokorin, L. Yu. Sadovskaya, D. V. Sviridov
{"title":"IR Spectroscopic Study of the Mechanism of Mechanostimulated Transformations of TiO2–MoO3 Heterooxide Composites","authors":"T. V. Sviridova,&nbsp;A. I. Kokorin,&nbsp;L. Yu. Sadovskaya,&nbsp;D. V. Sviridov","doi":"10.1007/s10812-025-01968-0","DOIUrl":"10.1007/s10812-025-01968-0","url":null,"abstract":"<p>IR spectroscopy along with x-ray diffraction and electron microscopy was used to show that the mechanochemical activation of a mixture of Degussa 25 TiO<sub>2</sub> and orthorhombic MoO<sub>3</sub> permits us to grow a disordered MoO<sub>3</sub> shell over titanium dioxide cores. The core–shell structure of the resultant photocatalyst particles facilitates charge separation under actinic irradiation and the accumulation of charge as reduced molybdenum oxide.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"749 - 754"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135086","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
UV Spectroscopy-Based Development and Validation of an Analytical Method for Simultaneous Estimation of Ellagic Acid and Quercetin in Bulk Suspension 紫外光谱法同时测定混悬液中鞣花酸和槲皮素含量的方法建立与验证
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01985-z
Kabil Malhotra, Kalpana Nagpal
{"title":"UV Spectroscopy-Based Development and Validation of an Analytical Method for Simultaneous Estimation of Ellagic Acid and Quercetin in Bulk Suspension","authors":"Kabil Malhotra,&nbsp;Kalpana Nagpal","doi":"10.1007/s10812-025-01985-z","DOIUrl":"10.1007/s10812-025-01985-z","url":null,"abstract":"<p>A UV visible spectroscopic method has been developed for the simultaneous estimation of quercetin and ellagic acid in a suspension. Validation of the developed method was done according to ICH Q2R2 guidelines. Calibration curves (R<sup>2</sup> &gt; 0.98) were prepared, demonstrating a linear response for the concentration ranges of both drugs. The results indicated high levels of accuracy and precision (all %RSD values &lt;2%). The findings suggest that this method can be readily adopted in routine laboratory settings, facilitating the simultaneous monitoring of drug levels in both bulk and dosage forms.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"897 - 906"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135077","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
Innovative Analytical Method Development and Validation for Metformin Using Simulated Salivary Fluid: A Preformulation Approach 利用模拟唾液液对二甲双胍进行创新分析方法的开发和验证：一种预配制方法
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01984-0
Sheeja Velayudhan Kutty, T. S. Shahla, P. P. Shahshad, V. S. Shifa
{"title":"Innovative Analytical Method Development and Validation for Metformin Using Simulated Salivary Fluid: A Preformulation Approach","authors":"Sheeja Velayudhan Kutty,&nbsp;T. S. Shahla,&nbsp;P. P. Shahshad,&nbsp;V. S. Shifa","doi":"10.1007/s10812-025-01984-0","DOIUrl":"10.1007/s10812-025-01984-0","url":null,"abstract":"<p>The current study aims to evaluate and assess the physiochemical characteristics of metformin hydrochloride, which is commonly used to treat type II diabetes. This study also focuses on the method development and validation of metformin hydrochloride by the UV-spectrophotometric method. The validation procedure adhered to the protocols specified by the ICH guidelines. The spectroscopic studies were done using simulated phosphate salivary fluid as a solvent, which mimics the physiological fluid in the human oral cavity. The drug was evaluated for its organoleptic assessment, solubility, pH, FTIR spectroscopy, partition coefficient, melting point, moisture content, and flow properties. The preformulation characteristics were thoroughly assessed and evaluated with the ranges specified in the monograph, and it was found to be within the limits. The absorption maxima for the drug using a simulated salivary fluid of pH 6.8 were found to be 233 nm, and the calibration curve for the metformin exhibited a linearity range of 1–9 μg/mL (r<sup>2</sup> = 0.998). The recovery studies were done at three different concentration levels and were found to be in the range of 97–98.8%. This study evaluates how the developed method meets its criteria for specificity, linearity, and accuracy, within the predefined acceptance limits. Thus, a simple, accurate, and economical method is developed and validated along with the preformulation characteristics, which expands its utility in the formulation of the drug.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"889 - 896"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135076","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
Sub-Doppler Fluorescence Resonances Induced by Local Broadband Optical Pumping in a Gas Cell 气腔内局部宽带光泵浦诱导的亚多普勒荧光共振
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01964-4
A. Ch. Izmailov, A. S. Gasanova
{"title":"Sub-Doppler Fluorescence Resonances Induced by Local Broadband Optical Pumping in a Gas Cell","authors":"A. Ch. Izmailov,&nbsp;A. S. Gasanova","doi":"10.1007/s10812-025-01964-4","DOIUrl":"10.1007/s10812-025-01964-4","url":null,"abstract":"<p>Sub-Doppler fluorescence resonances at the central frequencies of atomic (molecular) transitions induced by stationary broadband optical pumping in a cylindrical cell with a rarefied gas medium are established and analyzed. The pump radiation is considered to propagate transversely through a relatively narrow region of this cell. The dependences of the established sub-Doppler resonances on the intensity and spatial distribution of such an optical pumping are analyzed. The proposed method of high-resolution spectroscopy allows one to reduce the Doppler broadening of the recorded fluorescence resonances by a value equal to the ratio of the gas-cell diameter to the relatively narrow width of the local region of the pumping radiation.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"716 - 721"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135089","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
Spin-Cyclotron Resonance in n-Type Indium Antimonide at Low Temperatures 低温下n型锑化铟的自旋回旋共振
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01969-z
N. A. Poklonski, A. N. Dzeraviaha, S. A. Vyrko, A. I. Kovalev
{"title":"Spin-Cyclotron Resonance in n-Type Indium Antimonide at Low Temperatures","authors":"N. A. Poklonski,&nbsp;A. N. Dzeraviaha,&nbsp;S. A. Vyrko,&nbsp;A. I. Kovalev","doi":"10.1007/s10812-025-01969-z","DOIUrl":"10.1007/s10812-025-01969-z","url":null,"abstract":"<p>An interpretation of known experimental data on magnetic resonance measurements in tellurium-doped <i>n</i>-type indium antimonide crystals with compensation ratio <i>K</i> ≈ 0.1 of tellurium (hydrogen-like donors) by zinc (hydrogenlike acceptors) at 10 MHz frequency in a quantizing external magnetic field with induction from 0.17 to 1.70 T at liquid-helium temperature is proposed. It is revealed that the observed resonance is caused by the absorption of energy quanta of radio-frequency (10 MHz) radiation by <i>c</i>-band electrons. The electron transition between adjacent Landau levels is mediated by the electric component of the radio wave, while transitions between Zeeman sublevels are driven by its magnetic component. The number of absorbed radio-frequency quanta at resonance increases from 3.9∙10<sup>4</sup> to 1.6∙10<sup>5</sup> with <i>c</i>-band electron concentrations from 6∙10<sup>15</sup> to 5∙10<sup>18</sup> cm<sup>–3</sup> at an approximately constant compensation ratio. Calculations show that the width of the magnetic resonance lines (from peak to peak of the first derivative of the radio-wave absorption signal with respect to the external magnetic field) is determined by fluctuations in the potential energy of electrons in the crystals due to their doping and compensation.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"755 - 761"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135119","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
X-Ray Photoelectron Spectroscopy as a Probe of Beam-Induced Surface Decomposition of 1-Octyl-3-Methylimidazolium Tribromide x射线光电子能谱作为光束诱导三溴化1-辛基-3-甲基咪唑表面分解的探针
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01981-3
Baojun Liu, Li Wei, Shuang Men
{"title":"X-Ray Photoelectron Spectroscopy as a Probe of Beam-Induced Surface Decomposition of 1-Octyl-3-Methylimidazolium Tribromide","authors":"Baojun Liu,&nbsp;Li Wei,&nbsp;Shuang Men","doi":"10.1007/s10812-025-01981-3","DOIUrl":"10.1007/s10812-025-01981-3","url":null,"abstract":"<p>A systematic investigation of the beam-induced surface decomposition of a typical trihalide ionic liquid, 1-octyl-3-methylimidazolium tribromide, was conducted by X-ray photoelectron spectroscopy, and the electronic environment of the bromine region is discussed. The newly formed component was assigned to bromide, based on the measured Br 3d binding energy. The atomic loss of bromine as a function of exposure time under the X-ray beam is analyzed in detail. The analysis suggests that 1-octyl-3-methylimidazolium tribromide is decomposed under X-ray beam irradiation to yield 1-octyl-3-methylimidazolium bromide and liquid bromine, the latter of which subsequently leaves the system under the ultrahigh vacuum conditions.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"867 - 870"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135116","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
UV Method for Determination of Novel Combination of Antimicrobials by Spectral Resolution and in silico Pharmacokinetic Study 紫外分光光度法测定新型抗菌药组合及计算机药代动力学研究
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01983-1
K. Naga Prashant, K. G. Venkatesh, Yenduri Suvarna
{"title":"UV Method for Determination of Novel Combination of Antimicrobials by Spectral Resolution and in silico Pharmacokinetic Study","authors":"K. Naga Prashant,&nbsp;K. G. Venkatesh,&nbsp;Yenduri Suvarna","doi":"10.1007/s10812-025-01983-1","DOIUrl":"10.1007/s10812-025-01983-1","url":null,"abstract":"<p>Tetracycline HCl and tinidazole combination drugs are used for antimicrobial therapy. In order to quantify them in dosage forms by UV spectroscopy, resolving the spectral overlap is necessary to avoid interference. The present study introduced four simple, sustainable, mathematically processed UV spectrophotometric methods for the simultaneous determination of tetracycline HCl and tinidazole in binary mixtures and tablet dosage forms. The approaches used for resolving spectral overlap include first derivative, area under curve, dual wave length, and ratio difference methods. The methods demonstrated linearity in the range of 10–40 μg/mL for both drugs, while detection limits were in the range of 1.562–2.974 μg/mL for tetracycline HCl and tinidazole showed 0.077–1.65 μg/mL. ANOVA results showed no statistical difference among the methods. Sustainability assessment made by MoGAPI, RGB, and BAGI declared the developed method to be sustainable and eco-friendly. In silico drug–drug interaction study with respect to CYP450 enzymes showed no drug interactions. The developed method showed good agreement with validation parameters and was found to be efficient, economical, free of toxic solvents, and the complex sample preparation procedures indicated its sustainability.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"880 - 888"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135041","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
Magnetic Nanocomposites Fe3O4/FeOOH as a Promising Basis for Advanced Oxidation Processes (Fenton Reaction) 磁性纳米复合材料Fe3O4/FeOOH在高级氧化过程（Fenton反应）中的应用前景
IF 1 4区 化学
Journal of Applied Spectroscopy Pub Date : 2025-09-11 DOI: 10.1007/s10812-025-01971-5
Y. D. Mitskevich, M. M. Degtyarik, A. A. Kharchanka, M. V. Bushinsky, Yu. A. Fedotova, E. S. Voropay
{"title":"Magnetic Nanocomposites Fe3O4/FeOOH as a Promising Basis for Advanced Oxidation Processes (Fenton Reaction)","authors":"Y. D. Mitskevich,&nbsp;M. M. Degtyarik,&nbsp;A. A. Kharchanka,&nbsp;M. V. Bushinsky,&nbsp;Yu. A. Fedotova,&nbsp;E. S. Voropay","doi":"10.1007/s10812-025-01971-5","DOIUrl":"10.1007/s10812-025-01971-5","url":null,"abstract":"<p>Magnetic nanocomposite particles of Fe<sub>3</sub>O<sub>4</sub>/α-FeOOH were synthesized by alkaline coprecipitation from aqueous solutions of di- and trivalent iron salts. The phase composition and magnetic characteristics of the nanocomposite particles as compared to nanoparticles of single-phase Fe<sub>3</sub>O<sub>4</sub> were studied using x-ray structural analysis, Mössbauer spectroscopy, and vibration magnetometry. The sizes of the obtained particles (average diameters of 4-21 nm) and the Debye temperatures Θ<sub><i>D</i></sub> = 273 ± 19 and 327 ± 45 K for Fe<sub>3</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub>/FeOOH, respectively, were determined by various methods. The obtained magnetic characteristics of Fe<sub>3</sub>O<sub>4</sub>/FeOOH (<i>M</i><sub><i>s</i></sub> ≈ 32 emu/g at <i>T</i> = 300 K) allowed this composite material to be used as a reagent in improved oxidation processes followed by magnetic decantation.</p>","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"92 4","pages":"770 - 783"},"PeriodicalIF":1.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135042","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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