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
Spectroscopy
Elliot J. Tay, Jonathan E. Barnsley, Daniel B. Thomas, Keith C. Gordon
Summary: Resonance Raman spectroscopy was used to identify and characterize psittacofulvins, showing different behaviors in red and yellow regions with Raman band wavenumber shifts. One yellow region exhibited similar characteristics to the red regions, suggesting the presence of psittacofulvins with greater conjugation.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
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
Multidisciplinary Sciences
Andreij C. Gadelha, Douglas A. A. Ohlberg, Cassiano Rabelo, Eliel G. S. Neto, Thiago L. Vasconcelos, Joao L. Campos, Jessica S. Lemos, Vinicius Ornelas, Daniel Miranda, Rafael Nadas, Fabiano C. Santana, Kenji Watanabe, Takashi Taniguchi, Benoit van Troeye, Michael Lamparski, Vincent Meunier, Viet-Hung Nguyen, Dawid Paszko, Jean-Christophe Charlier, Leonardo C. Campos, Luiz G. Cancado, Gilberto Medeiros-Ribeiro, Ado Jorio
Summary: The twisted bilayer graphene undergoes self-organized lattice reconstruction, resulting in the formation of a superlattice that modulates vibrational and electronic structures, leading to phenomena such as strong correlations and superconductivity. Although experimental techniques and theoretical models face challenges in observing and describing these effects, nano-Raman spectroscopy can localize some vibrational modes and provide insights into the effects of electron-phonon coupling on the material properties.
Article
Chemistry, Physical
Wenguang Zhang, Ting Lv, Chunsan Deng, Hui Gao, Sanlue Hu, Fayu Chen, Jingwei Liu, Xuhao Fan, Yuncheng Liu, Binzhang Jiao, Leimin Deng, Wei Xiong
Summary: This study presents a transfer-free method for rapid synthesis of TiS3 nanoribbons and investigates the synthetic mechanism and crystal properties of TiS3 using Raman spectroscopy and ultrafast nonlinear optical spectroscopy. The findings lay a foundation for understanding and applying TMTCs in functional devices.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Cara E. Vennari, Quentin Williams
Summary: In this study, the high-pressure behavior of ilmenite was investigated using Raman spectroscopy up to 54 GPa at 300 K. The results showed a Fermi resonance between certain peaks indicating a charge transfer from Fe to Ti under compression. The behavior of phonons in FeTiO3 ilmenite appears to be primarily influenced by the complex electronic structure of iron and its interaction with titanium.
PHYSICS AND CHEMISTRY OF MINERALS
(2021)
Article
Materials Science, Ceramics
Xiuxiu Wan, Chengbin Shi, Yu Zhao, Jing Li
Summary: The structure and viscosity of slag containing CaF2 and Li2O were studied using techniques such as Raman spectroscopy and MAS-NMR. The results showed that the structure and viscosity of the slag changed as the CaF2 or Li2O content increased.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Spectroscopy
Vikas Kumar, Tim Holtum, Daniel Sebena, Michael Giese, Jens Voskuhl, Sebastian Schluecker
Summary: A UVRR spectroscopy setup with a picosecond pulsed laser excitation source tunable in the 210-2600 nm range is presented. By studying an artificial ligand, the optimum laser excitation wavelength for UVRR spectroscopy is determined to be 266 nm, with UVRR spectra detectable in the range of 266-275 nm with high signal-to-noise ratio. The flexibility of this tunable UVRR setup allows for identifying optimum conditions for other supramolecular ligands for peptide/protein recognition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR 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
Physics, Applied
A. J. X. Choorakuttil, A. Pruccoli, M. J. Winterhalder, P. Zirak, D. Gudavicius, G. Martynaitis, D. Petrulionis, D. Samsonas, L. Kontenis, A. Zumbusch
Summary: We present an experimental scheme for stimulated Raman scattering (SRS) microscopy using visible light excitation, allowing for electronically preresonant imaging of a wide range of chromophores with sensitivities as low as 1 mu M. Our experiment utilizes two synchronously pumped optical parametric oscillators (OPOs) in the near-infrared region, and by combining spectral focusing and tuning, we demonstrate the recording of epr-SRS spectra over the entire range of molecular vibrations at a speed 20 times faster than classical wavelength tuning. The imaging capabilities of this setup are demonstrated with material scientific and cellular samples.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Sergio L. L. M. Ramos, Marcos A. Pimenta, Ana Champi
Summary: The study investigates the double-resonance Raman process in rhombohedral graphite and compares it with Bernal graphite, revealing that rhombohedral graphite exhibits a richer DR Raman spectrum due to its larger Brillouin zone volume. The 2D band of rhombohedral graphite is broader and shows different dispersive behavior compared to Bernal graphite. Additionally, the intervalley TO-LA band of rhombohedral graphite is broader and richer in features.
Article
Chemistry, Physical
Beliz Sertcan, Seyyed Jabbar Mousavi, Marcella Iannuzzi, Peter Hamm
Summary: Theoretical calculations of low-frequency anharmonic couplings in the beta-phase of crystalline bromoform were conducted based on density functional theory quantum chemistry calculations. The dominant role of electrical anharmonicity in the 2D Raman-THz response of both crystalline and liquid bromoform was revealed. The difference in relative cross-peak intensities between intramolecular and intermolecular modes in bromoform can be explained by the C-3v symmetry of bromoform along with orientational averaging.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Review
Chemistry, Inorganic & Nuclear
Denis A. Proshlyakov, Mark A. Farrugia, Yegor D. Proshlyakov, Robert P. Hausinger
Summary: Conventional ureases and oxygen-labile ureases have similar structures, but differ significantly in their active sites and requirements for accessory proteins.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Physics, Applied
Yuruo Zheng, Yinan Zhao, Jiajun Yu, Wei Lu, Jiqiang Ning, Changcheng Zheng
Summary: The Fano line shape at around 185 cm(-1) is observed in temperature-dependent Raman spectra of BaTiO3 nanoparticles. The dip structure on the low-energy side indicates a positive asymmetric parameter q, which is attributed to the interference between the central peak from quasi-elastic scattering mode and the A(TO) vibrational mode around 180 cm(-1). Furthermore, the relationship between the phase change of BaTiO3 nanoparticles and the Fano line shape is discussed. This work deepens the understanding of the mechanism underlying the Fano line shape in Raman spectra and provides a powerful strategy to characterize the phase change of nanostructured BaTiO3.
APPLIED PHYSICS EXPRESS
(2023)
Article
Instruments & Instrumentation
Dmitry V. Petrov
Summary: This paper discusses a technique for deriving carbon monoxide intensity in Raman spectra by fitting nitrogen spectrum at various temperatures. It is found that ignoring the Herman-Wallis factors in the fitting procedure leads to an additional measurement error, especially at high temperatures.
APPLIED SPECTROSCOPY
(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)