Article
Spectroscopy
Junying Hu, Jingkai Bi, Chenglin Sun, Zhiwei Men
Summary: This study investigates the impact of environmental changes on the Fermi resonance (FR) phenomenon through Raman spectroscopy of pyridine mixed with ethanol. The results show that the FR parameters exhibit a nonlinear dependence on the pyridine concentration fractions, and changes in ethanol concentration affect the strength of the hydrogen bonds. Two-dimensional correlation Raman spectroscopy and high-pressure Raman spectroscopy are used to analyze the interaction mechanism and phase transition of the binary solution.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Anatoliy Yaremko, Volodymyr Yukhymchuk, Oleksandr Hreshchuk, Vadym Koroteev, Volodymyr Dzhagan
Summary: This study examines the influence of electric field induced by localized plasmon excitation in nanostructured metal film on the vibrational spectrum of adsorbed organic molecule using the Green function formalism. It is shown that the electric field can significantly affect the frequencies of molecular vibrations and the anharmonicity constant. Additionally, if Fermi resonance occurs in the adsorbed molecule, its spectral manifestation in Raman spectra will also be altered by the plasmon's electric field.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Spectroscopy
Junying Hu, Jingkai Bi, Chenglin Sun, Zhiwei Men
Summary: This study investigated the effect of high pressure on Hydroquinone (HQ) and found that at a pressure of 3.61 GPa, a fundamental Fermi resonance phenomenon occurred due to a symmetry change.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Shuo Zhang, Hongsheng Jia, Mingxing Song, He Shen, Li Dongfei, Li Haibo
Summary: The low-temperature studies of liquid CH3CN were conducted using Raman spectral measurements, revealing structural phase transitions at -50 and -60 degrees C. Fermi resonance parameters were calculated and found to show discontinuities at the same temperatures as observed in Raman shifts of CH3CN. This suggests that Fermi resonance parameters can be used as an indicator for structural phase transitions in CH3CN under low temperature.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Yurii A. Romaniuk, Sergii Golovynskyi, Alexander P. Litvinchuk, Dan Dong, Yan Lin, Oleksandr Datsenko, Matteo Bosi, Luca Seravalli, Ivan S. Babichuk, Volodymyr O. Yukhymchuk, Baikui Li, Junle Qu
Summary: This study experimentally and theoretically investigated the vibration frequency changes in monolayer and few-layer MoS2 crystals, showing a good agreement between experimental and theoretical results. The proposed method can be used to estimate the layer thickness of MoS2 and determine interaction parameters, as well as to analyze spectra of other 2D layered materials.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Energy & Fuels
Xiaojin Guo, Xiang Xu, Xiaoyong Xue, Xiquan Li
Summary: Deconvoluting method is crucial for analyzing Raman spectra of coals and chars, and in this study, a new function correlated with defects was established using this method. The technique can be applied to other hydrocarbons for constructing functions reflecting different structural characteristics.
Article
Spectroscopy
Ning Li, Hao Sheng, Ying Sun, Jingang Wang
Summary: This paper theoretically studies the absorption spectra, charge transfer, and electron transport properties of PBFDO polymers, and analyzes the physical mechanisms. It provides necessary theoretical guidance for the application of PBFDO in the field of nanoscale optoelectronics and device design.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Zhiliang Jin, Youlin Wu
Summary: Graphdiyne (GDY), a new two-dimensional carbon hybrid material, has gained significant attention due to its unique properties in photocatalytic activity. In this study, researchers successfully developed a new method for the low-cost and high-yield production of GDY. Experimental results demonstrated that this one-pot conjugation method offers simplicity and obvious universality.
Article
Spectroscopy
Zian Wang, Keji Yu, Yanying Zhao, Jiadan Xue, Caiying Jiang, Huigang Wang, Huizhen Wu
Summary: In this study, the vibration bands of ethylene carbonate and its binary mixture were investigated, and the spectral calculations were performed using an aggregation-induced spectral splitting model. The results showed that the noncoincidence effect and frequency shifts could be well explained by the dimer structure.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Mizuho Kajita, Tomohisa Takaya, Koichi Iwata
Summary: In this study, the solvation process of electrons ejected from trans-stilbene and biphenyl was observed using femtosecond time-resolved near-IR spectroscopy. The near-IR absorption signals of the ejected electrons were found to rise within approximately 0.3 ps. The delayed appearance of the radical cation signals suggests that they are initially formed in a highly excited state and relax to the ground state within a few tens of picoseconds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Chemistry, Analytical
Yuxuan Qiu, Cuifang Kuang, Xu Liu, Longhua Tang
Summary: This article provides a comprehensive review of the key concepts, advanced implementations, and applications of single-molecule surface-enhanced Raman spectroscopy (SM-SERS). SM-SERS has the potential to detect single molecules in a high-throughput, non-invasive, and label-free manner, making it widely applicable in chemical analysis, nanoelectronics, and biochemical sensing.
Article
Chemistry, Physical
Ying Wang, Fabing Li, Zhenguo Dou, Chenglin Sun, Wenhui Fang, Zhiwei Men
Summary: The study found that the stimulated Raman scattering of water molecules excited by 532 nm laser can be greatly enhanced by introducing a 650 nm continuous-wave seeding laser, which not only increases the intensity but also reduces the threshold of SRS. This opens up new possibilities for enhancing weak Raman vibrational modes using resonance methods.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Sunandita Paul, Vamsee K. Voora, Jyotishman Dasgupta
Summary: In this study, the excited state dynamics of a redox-active TTF radical cation and its corresponding dimethyl-derivative inside a confined supramolecular cavity were investigated. It was found that upon photoexcitation, these reactive intermediates quickly de-excite to the hot ground state, inhibiting further oxidation reactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Physics, Condensed Matter
C. I. Medel-Ruiz, J. R. Molina-Contreras, C. Frausto-Reyes, J. R. Sevilla-Escoboza, H. Perez Ladron de Guevara
Summary: The study reveals that the electron-phonon interaction is influenced by surface roughness, with EPI strength increasing as roughness increases. In an undoped CdTe sample, EPI and surface morphology allow other phonons to manifest in the RRS spectra. This work contributes to the understanding and potential control of EPI in semiconductors.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Nadezhda M. Panich, Boris G. Ershov
Summary: The solubility and stability of ozone in acetonitrile were studied in the temperature range of 233-295 K. Optimum conditions for using acetonitrile as an ozonation medium were determined. The decomposition rate of O-3 increases with the amount of water in acetonitrile. Calculations were performed to determine the solubility coefficients and limiting solubility of O-3 in acetonitrile at different temperatures.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)