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Orange Dye Removal Efficiency by Few-layer Graphene: an Investigation by UV-Vis Spectroscopy 紫外可见光谱法研究少层石墨烯对橙色染料的去除效果
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-31 DOI: 10.1134/S0030400X22030092
Hamid Motahari, Hoorieh Shaterian Mohammadi, Abbas Behjat
{"title":"Orange Dye Removal Efficiency by Few-layer Graphene: an Investigation by UV-Vis Spectroscopy","authors":"Hamid Motahari,&nbsp;Hoorieh Shaterian Mohammadi,&nbsp;Abbas Behjat","doi":"10.1134/S0030400X22030092","DOIUrl":"10.1134/S0030400X22030092","url":null,"abstract":"<p>Nowadays, few-layer graphene (FLG) has been introduced as a new type of adsorbent. In this research, the orange dyes including, methyl orange (MO) as an industrial dye and the soft drink orange dye (orange Fanta soda) as a food dye, have been removed by FLG adsorbent. In all steps, UV-Vis spectroscopy as a valuable and fast method has been applied. The optical absorption coefficient has been decreased from 0.9 to less than 0.2 by FLG adsorbent for 50 ppm MO dye solution. Therefore, the MO solution with 50 ppm concentration converts to about 10 ppm output solution using 0.05 g of FLG adsorbent in a few minutes. It is about 80% adsorption dye removal efficiency. Also, MO dye removals have been performed in the range of 10 ppm to 500 ppm concentrations, but as the concentration of the solution increases, the dye adsorption ability of FLG decreases. The maximum efficient and optimum MO dye concentrations are about 100 ppm and 50 ppm, respectively, due to 0.05 g FLG adsorbent. It has been completely saturated at about 500 ppm concentration MO dye solution. Also, it has been observed that, for 50 ppm MO dye solution, increasing the amount of mass adsorbent from 0.05 to 0.25 g can cause the output MO concentration to decrease from 10 ppm to 3 ppm. It has been revealed that about 94% of MO dye can remove by 0.25 g FLG adsorbent. The contact time due to 94% MO removal process is less than 5 minutes. Therefore, only by 0.25 g of FLG adsorbent we can purify wastewater containing 50 ppm MO dye to less than 3 ppm dye concentration, at less than a few minutes. Finally, the FLG glass tube filter can remove more than 90% food orange dye in less than 90 s for 50 mL of soft drink solution. Therefore, the FLG tube filtration process is so fast, easy, and high efficient.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 3","pages":"195 - 202"},"PeriodicalIF":0.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5184278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Magnetooptics of Cholesteric Liquid Crystals 胆甾型液晶的磁光学研究
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-31 DOI: 10.1134/S0030400X22030055
A. H. Gevorgyan, S. S. Golik
{"title":"On the Magnetooptics of Cholesteric Liquid Crystals","authors":"A. H. Gevorgyan,&nbsp;S. S. Golik","doi":"10.1134/S0030400X22030055","DOIUrl":"10.1134/S0030400X22030055","url":null,"abstract":"<p>Specific features of the optical properties of cholesteric liquid crystals (CLCs) in an external static magnetic field have been studied theoretically taking into account the magneto-optical activity. The boundary-value problem of reflection from a half-space of a planar CLC and light transmission through a finite layer of a magnetoactive CLC at normal incidence have been considered. Specific features of evolution of reflection from a half-space at a change in the magneto-optical activity parameter have been investigated. Existence of the effect of magnetically induced transmission (MIT) in a CLC with real parameters is shown. Specific features of the resonant MIT lines at different values of local optical anisotropy of a CLC have been discussed.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 3","pages":"163 - 172"},"PeriodicalIF":0.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5175897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical and Photoluminescent Properties of a Thin Zinc Oxide Film on a Lithium Tantalate Substrate 钽酸锂衬底上氧化锌薄膜的光学和光致发光特性
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-31 DOI: 10.1134/S0030400X22030067
L. V. Grigoriev, A. A. Semenov, A. V. Mikhailov
{"title":"Optical and Photoluminescent Properties of a Thin Zinc Oxide Film on a Lithium Tantalate Substrate","authors":"L. V. Grigoriev,&nbsp;A. A. Semenov,&nbsp;A. V. Mikhailov","doi":"10.1134/S0030400X22030067","DOIUrl":"10.1134/S0030400X22030067","url":null,"abstract":"<p>The results of a study of the structural, optical, and photoluminescent properties of a thin zinc oxide film on a LiTaO<sub>3</sub> substrate have been presented. The results of x-ray diffraction analysis of a zinc oxide film synthesized on a substrate of monocrystalline lithium tantalate and on a substrate of quartz KU-1 have been presented. The transmission, reflection, and absorption spectra, spectral dependence of photoluminescence of a thin ZnO film of on a ferroelectric substrate LiTaO<sub>3</sub> and the ZnO-quartz structure in the ultraviolet and visible spectral ranges have been given. The results of the restoration of the energy spectrum of optically active defects present in the ZnO–LiTaO<sub>3</sub> structure by the Tikhonov–Lavrentiev regularization method have been presented.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 3","pages":"173 - 179"},"PeriodicalIF":0.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5175898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transient Absorption Dynamics and Nonlinear Optical Response in Colloidal Ag2S Quantum Dots 胶体Ag2S量子点的瞬态吸收动力学和非线性光学响应
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-31 DOI: 10.1134/S0030400X22030146
M. S. Smirnov, O. V. Ovchinnikov, A. I. Zvyagin, S. A. Tikhomirov, A. N. Ponyavina, V. A. Povedailo, Nguyen Thanh Binh, Pham Hong Minh
{"title":"Transient Absorption Dynamics and Nonlinear Optical Response in Colloidal Ag2S Quantum Dots","authors":"M. S. Smirnov,&nbsp;O. V. Ovchinnikov,&nbsp;A. I. Zvyagin,&nbsp;S. A. Tikhomirov,&nbsp;A. N. Ponyavina,&nbsp;V. A. Povedailo,&nbsp;Nguyen Thanh Binh,&nbsp;Pham Hong Minh","doi":"10.1134/S0030400X22030146","DOIUrl":"10.1134/S0030400X22030146","url":null,"abstract":"<p>The mechanism of the nonlinear optical response of colloidal solutions of Ag<sub>2</sub>S quantum dots passivated with thioglycolic acid molecules is considered. Appearance of nonlinear absorption and nonlinear refraction is shown by the Z-scan method using 10-ns pulses of the second harmonic of a Nd:YAG laser. The absorption coefficient dependence was found to saturate with increasing incident radiation intensity. It is suggested that nonlinear absorption occurs with participation of the localized states of structural defects in Ag<sub>2</sub>S, including the defect luminescence center, which is confirmed by femtosecond transient absorption spectroscopy. A broad structureless transient absorption band is observed in the range of 500–1000 nm, which decays on a time scale of picoseconds. It is concluded that the transient absorption signal is caused by fast (fractions of picoseconds) capture of charge carriers by localized states, which then induce the nonlinear absorption of 10-ns pulses.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 3","pages":"224 - 231"},"PeriodicalIF":0.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5184280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study of the Structure of Mammoth Tusk by IR Spectroscopy 猛犸象牙结构的红外光谱研究
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-31 DOI: 10.1134/S0030400X22030110
V. V. Pavlova, E. S. Petukhova, T. A. Isakova, E. S. Kolesova, A. A. Chirikov, F. F. Protopopov
{"title":"Study of the Structure of Mammoth Tusk by IR Spectroscopy","authors":"V. V. Pavlova,&nbsp;E. S. Petukhova,&nbsp;T. A. Isakova,&nbsp;E. S. Kolesova,&nbsp;A. A. Chirikov,&nbsp;F. F. Protopopov","doi":"10.1134/S0030400X22030110","DOIUrl":"10.1134/S0030400X22030110","url":null,"abstract":"<p>We studied the structure of the mammoth tusk by infrared spectroscopy, including after heat treatment. The entire complex of functional groups of the tusk components—hydroxyapatite, collagen, and water—was revealed. Collagen is represented in the IR spectrum by the characteristic absorption bands of amide and aliphatic groups. After heat treatment at 600°C, the organic part is completely removed from the sample. Hydroxyapatite occurs in the tusk bone tissues in a carbonate-substituted form; the heat treatment at 900°C removes the carbonate anion and water from the sample, transiting hydroxyapatite from a nonstoichiometric state to a stoichiometric one.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 3","pages":"207 - 213"},"PeriodicalIF":0.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5181441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Identification of the Products of the Reaction of Iron Complexes by the Vibration Spectrum by Way of Example of an Iron [Fe(OH)2(H2O)2]+ Hydroxo Cation in an Aqueous Medium 铁配合物反应产物的振动谱鉴定——以水介质中铁[Fe(OH)2(H2O)2]+羟基阳离子为例
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-18 DOI: 10.1134/S0030400X22010143
K. V. Simon, A. V. Tulub
{"title":"The Identification of the Products of the Reaction of Iron Complexes by the Vibration Spectrum by Way of Example of an Iron [Fe(OH)2(H2O)2]+ Hydroxo Cation in an Aqueous Medium","authors":"K. V. Simon,&nbsp;A. V. Tulub","doi":"10.1134/S0030400X22010143","DOIUrl":"10.1134/S0030400X22010143","url":null,"abstract":"<p>The change in the vibration spectrum of an iron [Fe(OH)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>]<sup>+</sup> hydroxo cation during its interaction with peroxynitrite [NO–O<sub>2</sub>]<sup>−</sup> in an aqueous medium described by the PCM–SMD model is studied to identify the reaction products, first of all, nitrogen dioxide. The quantum chemical calculation of the complex by CASSCF is identical to that earlier used in the description of the reactions in the active site of the tubercle bacillus <i>M. tuberculosis</i> (trHbN). The reaction products in these processes are compared, and the most characteristic frequency of vibrations which makes it possible to detect the appearance of nitrogen dioxide is found. The energy effect in the reverse process, capture of nitrogen dioxide by an iron complex, is estimated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 2","pages":"86 - 91"},"PeriodicalIF":0.6,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4721173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanism of Dependence of Fluorescent Properties of Tetraaryltetracyanoporphyrazine and Its Derivatives on Viscosity 四芳基四氰卟啉及其衍生物荧光性质对粘度依赖性的机理研究
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-18 DOI: 10.1134/S0030400X22010064
N. V. Ivashin
{"title":"Mechanism of Dependence of Fluorescent Properties of Tetraaryltetracyanoporphyrazine and Its Derivatives on Viscosity","authors":"N. V. Ivashin","doi":"10.1134/S0030400X22010064","DOIUrl":"10.1134/S0030400X22010064","url":null,"abstract":"<p>The paper presents quantum chemical calculations of the conformational structure in the ground and excited states of tetraaryltetracyanoporphyrazine (H<sub>2</sub>–Pz(Ph)<sub>4</sub>(CN)<sub>4</sub>) and its derivatives, which are considered promising photodynamic photosensitizers with the function of fluorescent control of the degree of destruction of cancer cells. It was shown that, in the absence of specific interactions with the solvent, these compounds are characterized by a planar macrocycle structure both in the ground and the excited S<sub>1</sub> states. Among the low-lying excited states, there are no those whose population can lead to fluorescence quenching due to a noticeable change in the position of the phenyl rings relative to the macrocycle in the torsion coordinate. This suggests that these compounds cannot be classified as fluorescent rotors, as was previously assumed. It has been found that H<sub>2</sub>–Pz(Ph)<sub>4</sub>(CN)<sub>4</sub> and its derivatives in the solution form solvate complexes with oxygen-containing solvent molecules (water, methanol, ethanol, glycerol, tetrahydrofuran) with the participation of the H and N atoms of the pyrrole and pyrrolenine rings, respectively. These complexes are characterized by out-of-plane distortion of the macrocycle, which increases significantly in the S<sub>1</sub> state and leads to large displacements of peripheral substituents perpendicularly to the macrocycle. The conformational dynamics in the S<sub>1</sub> state is accompanied by a reduction in the energy gap Δ<i>Е</i>(S<sub>0</sub> – S<sub>1</sub>), an increase in the spin–orbit interaction between the excited states, and anharmonicity of NH stretching vibrations. All these factors lead to a decrease in the fluorescence lifetime (τ<sub>F</sub>) of H<sub>2</sub>–Pz(Ph)<sub>4</sub>(CN)<sub>4</sub> and their derivatives in the solution and contribute to the dependence of τ<sub>F</sub> on the viscosity of the medium.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 2","pages":"45 - 54"},"PeriodicalIF":0.6,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4724569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of the Photorecombination Spectrum when Atoms Irradiated by a Strong Laser Field Based on the Markov Approximation 基于马尔可夫近似的强激光辐照原子光复合光谱计算
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-18 DOI: 10.1134/S0030400X22010052
A. M. Ishkhanyan, V. P. Krainov
{"title":"Calculation of the Photorecombination Spectrum when Atoms Irradiated by a Strong Laser Field Based on the Markov Approximation","authors":"A. M. Ishkhanyan,&nbsp;V. P. Krainov","doi":"10.1134/S0030400X22010052","DOIUrl":"10.1134/S0030400X22010052","url":null,"abstract":"<p>Within the framework of the Markov (factorization) approximation based on the factorization of the total density matrix of a system of an atom, a laser field, and an electromagnetic vacuum field, the spectrum of spontaneous photon emission when atoms are irradiated by a strong laser field is calculated.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 2","pages":"42 - 44"},"PeriodicalIF":0.6,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4721171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the Ro-Vibrational Structure of the Fundamental Band ν6 of 13CHF3 Molecule 13CHF3分子基本能带ν6的反振动结构分析
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-18 DOI: 10.1134/S0030400X22010039
E. S. Bekhtereva, A. L. Fomchenko, T. Ersin, S. Bauerecker
{"title":"Analysis of the Ro-Vibrational Structure of the Fundamental Band ν6 of 13CHF3 Molecule","authors":"E. S. Bekhtereva,&nbsp;A. L. Fomchenko,&nbsp;T. Ersin,&nbsp;S. Bauerecker","doi":"10.1134/S0030400X22010039","DOIUrl":"10.1134/S0030400X22010039","url":null,"abstract":"<p>The high-resolution IR spectrum of the fundamental band ν<sub>6</sub> of <sup>13</sup>CHF<sub>3</sub> molecule, located in the region of 450–750 cm<sup>–1</sup>, has been investigated. The spectrum was analyzed based on the ground-state combination-difference method. About 5500 transitions were assigned as a result of the analysis, based on which 2607 experimental values of ro-vibrational energies in the state ν<sub>6</sub> = 1 were determined. The results surpass the data known in the literature, both in the amount of obtained experimental data and in the number of highly excited ro-vibrational energy levels extracted from these data. Based on the information extracted from the spectrum, the spectroscopic parameters of the state under consideration were determined, which reproduce the initial data with an error of 4.4 × 10<sup>–5</sup> cm<sup>–1</sup>.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 2","pages":"35 - 41"},"PeriodicalIF":0.6,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4721639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of Non-Classical Multiphoton States of Light with Squeezed Quantum Fluctuations in Bismuth-Modified Tellurite Glass Fibers 铋改性碲酸盐玻璃纤维中压缩量子涨落非经典多光子态的形成
IF 0.6 4区 物理与天体物理
Optics and Spectroscopy Pub Date : 2022-07-18 DOI: 10.1134/S0030400X22010167
A. A. Sorokin, V. V. Dorofeev, S. E. Motorin, I. Lyashuk, J. Porins, G. Leuchs, V. Bobrovs
{"title":"Formation of Non-Classical Multiphoton States of Light with Squeezed Quantum Fluctuations in Bismuth-Modified Tellurite Glass Fibers","authors":"A. A. Sorokin,&nbsp;V. V. Dorofeev,&nbsp;S. E. Motorin,&nbsp;I. Lyashuk,&nbsp;J. Porins,&nbsp;G. Leuchs,&nbsp;V. Bobrovs","doi":"10.1134/S0030400X22010167","DOIUrl":"10.1134/S0030400X22010167","url":null,"abstract":"<p>An optical fiber with a high Kerr nonlinearity coefficient has been proposed and manufactured from bismuth-modified tellurite glass for creation of non-classical multiphoton states of light. Specifically, we have proposed to use these fibers to squeeze the quantum fluctuations of one of the quadratures of light in the 20 W signal significantly below –10 dB compared to the standard quantum noise limit, which is important for various practical applications. Using numerical simulation based on the stochastic nonlinear Schrödinger equation, we have demonstrated noise squeezing stronger than –16 dB at tellurite fiber lengths of 6–14 m, while in squeezing of –14 dB is expected in silica glass fibers having lengths of 120–300 m. Analytical formulas were used to analyze the physical factors that limit the achievable squeezing.</p>","PeriodicalId":723,"journal":{"name":"Optics and Spectroscopy","volume":"130 2","pages":"102 - 107"},"PeriodicalIF":0.6,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4722823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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