Article
Chemistry, Analytical
Nain Mukesh, Bence G. Markus, Nikoletta Jegenyes, Gabor Bortel, Sarah M. Bezerra, Ferenc Simon, David Beke, Adam Gali
Summary: Silicon carbide is a promising platform for quantum information processing due to its ability to host room temperature solid state defect quantum bits. By adding aluminum precursor to the synthesis process, quantum bit defects can be created without the need for post treatments. The synthesis parameters were optimized to increase the concentration of paramagnetic defects, including already established defect quantum bits, as monitored by electron spin resonance spectroscopy.
Article
Materials Science, Multidisciplinary
Ameen Uddin Ammar, Ipek Deniz Yildirim, Mohamad Hasan Aleinawi, Merve Buldu-Akturk, Nur Selin Turhan, Shankari Nadupalli, Arpad Mihai Rostas, Emre Erdem
Summary: The doping of Mn, Fe, and Cu ions into ZnO nanocrystals adds magnetic phenomena to their semiconducting property. However, there is a lack of research on the local lattice structure, spin-exchange phenomena, and interaction between defects and doped metal ions in TM ion-doped ZnO. This study uses multi-frequency (EPR) techniques to investigate ZnO:TM, revealing the localization of the dopant ion, site symmetry, and the formation of intrinsic-extrinsic defect complexes. The incorporation of TM ions modifies the intrinsic defect structure of ZnO nanocrystals, with the appearance of peculiar spin-exchange phenomena from intrinsic-extrinsic defect complexes, and charge selective substitutions in the matrix are observed for Cu2+ compared to Mn2+ and Fe3+.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Multidisciplinary
Hong Hee Kim, Heebin Lee, Jeung Ku Kang, Won Kook Choi
Summary: In this study, both PL and EPR techniques were used to investigate the defect centers and their relationship with the EPR peak g = 1.96 in ZnO. It was found that the disappearance of green luminescence was related to electron transitions from the conduction band or shallow donor defect centers to deep defects. The presence of the EPR peak g = 1.96 was correlated with the light irradiation and trapped electrons in the conduction band. Additionally, the spin-spin relaxation time estimated from the EPR signal was two orders of magnitude longer than that of bulk or thin-film ZnO.
ANNALEN DER PHYSIK
(2022)
Article
Chemistry, Physical
H. S. Lokesha, A. R. E. Prinsloo, P. Mohanty, C. J. Sheppard
Summary: The effects of Cr ion doping on the structure, optical and magnetic properties of ZnO were investigated. Zn1-xCrxO (0 ≤ x ≤ 0.05) samples were prepared using the solution combustion method. X-ray diffraction results showed that all samples had a hexagonal structure. Transmission electron microscopy (TEM) revealed the particle size of Zn1-xCrxO with x = 0, 0.03 and 0.05 to be 48.2 ± 2.1 nm, 29.4 ± 2.2 nm, and 25.3 ± 2.1 nm, respectively. The band-gap slightly decreased from 3.308 ± 0.003 eV to 3.291 ± 0.003 eV with an increase in Cr content. Room temperature ferromagnetism (RTFM) was observed in ZnO and Cr-doped ZnO through magnetization measurements. The origin of RTFM was attributed to negatively charged zinc vacancies (VZn) and singly ionized oxygen vacancies (Vo+). The replacement of Zn2+ sites by Cr3+ ions in hexagonal ZnO was confirmed by electron paramagnetic resonance (EPR) results. The observed long-range ferromagnetic ordering was explained by the bound magnetic polaron (BMP) mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Hideo Utsumi, Toshiki Masumizu, Ryoma Kobayashi, Tomoko Tahira, Fuminori Hyodo, Tatsuya Shimizu, Tatsuya Naganuma, Kazunori Anzai
Summary: Free radicals are key substances in organisms but can also cause oxidative diseases. Dynamic nuclear polarization- magnetic resonance imaging is a noninvasive imaging method that can be used for in vivo free radical imaging.
ANALYTICAL CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Natalie C. C. Kegulian, Ralf Langen, Janet Moradian-Oldak
Summary: The enamel matrix protein Ameloblastin (Ambn) undergoes localized structural changes upon interaction with its targets, as revealed by biophysical assays and liposome experiments. These changes are independent of peptide self-association and involve competition between Ambn-Amel and Ambn-membrane interactions. The findings provide insights into the multifunctionality of Ambn in enamel formation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Lionel Mignion, Celine M. Desmet, Evelyne Harkemanne, Isabelle Tromme, Nicolas Joudiou, Mohammad Wehbi, Jean-Francois Baurain, Bernard Gallez
Summary: This study explored the capability of low-frequency Electron Paramagnetic Resonance (EPR) to detect melanin in the human skin. The results showed that EPR could differentiate the EPR signal of melanin between melanoma and benign nevi, providing a new method for the diagnosis of pigmented skin lesions.
FREE RADICAL BIOLOGY AND MEDICINE
(2022)
Article
Materials Science, Multidisciplinary
P. J. Jumana, A. Anil, V Kumar
Summary: This study reports the possibility of using defect chemistry to suppress hexagonal phase formation in donor-acceptor co-doped BaTiO3 for the first time. The stabilization of the perovskite phase is related to the donor/acceptor ratio and the doping mechanism.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Biochemistry & Molecular Biology
Natalia Rosiak, Judyta Cielecka-Piontek, Robert Skibinski, Kornelia Lewandowska, Waldemar Bednarski, Przemyslaw Zalewski
Summary: This study aimed to investigate the impact of electron beam irradiation on the stability and antioxidant properties of resveratrol. The concentration of free radicals and minor changes in chemical structure were evaluated using EPR and FTIR spectroscopy, respectively. HPLC and HPLC-MS analysis confirmed no degradation products or trans- to cis-resveratrol conversion after irradiation. The antioxidant potential of resveratrol was found to be enhanced by electron beam irradiation.
Article
Biochemistry & Molecular Biology
Zainab Hafideddine, Tim Loier, Niels Van Brempt, Sasha De Henau, H. Y. Vincent Ching, Sander Neukermans, Saskia Defosse, Herald Berghmans, Roberta Sgammato, Roy Aerts, Dietmar Hammerschmid, Rani Moons, Tom Breugelmans, Frank Sobott, Christian Johannessen, Wouter Herrebout, Bart P. Braeckman, Luc Moens, Sylvia Dewilde, Sabine Van Doorslaer
Summary: This study characterizes the biophysical properties and expression pattern of Caenorhabditis elegans globin-3 (GLB-3). GLB-3 is expressed in the reproductive and nervous system and plays a crucial role in fertility and motility. It shows unique stability and is involved in (cysteine) redox chemistry.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Physical
S. Mrabet, N. Ihzaz, M. Alshammari, N. Khlifi, M. Ba, M. N. Bessadok, I. H. Mejri, L. El Mir
Summary: Pure and doped ZnO nanoparticles were synthesized via a modified sol-gel method. The crystal structure of ZnO remained intact with vanadium doping, as confirmed by various analytical techniques. SEM and TEM were used to examine the morphology of the samples. UV-Vis-NIR spectra showed changes in the band gap and absorption band with increased vanadium content. Photoluminescence analysis revealed the creation of defects in the band gap due to vanadium doping. Magnetic studies indicated a mixed state of ferromagnetic and paramagnetic phases, with magnetic interaction explained by defects-induced magnetic polarons.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nuclear Science & Technology
Jae Seok Kim, Byeong Ryong Park, Minsu Cho, Won Il Jang, Yong Kyun Kim
Summary: Exposure to ionizing radiation generates free radicals in human nails, which can be detected by radiation-induced signal (RIS) in electron paramagnetic resonance (EPR) spectroscopy. Fingernails are more affected by moisture and heat compared to tooth enamel samples, but they are sensitive to radiation and easy to collect. This study analyzed the dosimetric characteristics of fingernails and proposed a fingernail-EPR dosimetry protocol for retrospective dosimetry in localized hand exposure accidents. The practicality of the protocol was validated through blind and field experiments, showing promising results for the application of fingernail-EPR dosimetry in radiological accidents.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Pauline Nibbe, Johannes Schleusener, Silas Siebert, Richard Borgart, Doreen Brandt, Ronja Westphalen, Nadine Schuler, Bastian Berger, Eva M. J. Peters, Martina C. Meinke, Silke B. Lohan
Summary: Oxidative stress is a driving factor for diseases and has led to a growing trend of using antioxidant supplementation. This study developed a stress response assessment method using in-situ irradiation and electron paramagnetic resonance spectroscopy. The method was validated in a pilot study and showed positive correlations between oxidative stress coping capacity and vitamin C concentration in blood plasma. The method has potential applications in future studies and clinical routine.
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Boris Epel, Joseph P. Y. Kao, Sandra S. Eaton, Gareth R. Eaton, Howard J. Halpern
Summary: Recent advances in instrumentation and molecular probes have made it possible to quantitatively image tissue redox status in vivo. The use of low-frequency electron paramagnetic resonance (EPR) techniques and novel spin probes has led to significant advancements in this field. However, further improvements in spin probes and RS instrumentation are needed to fully realize the potential of redox imaging in tissue.
ANTIOXIDANTS & REDOX SIGNALING
(2023)
Article
Nanoscience & Nanotechnology
Artem S. Poryvaev, Eva Gjuzi, Anastasiya A. Yazikova, Daniil M. Polyukhov, Yana N. Albrekht, Aleksandr A. Efremov, Nikita A. Kudriavykh, Vadim V. Yanshole, Frank Hoffmann, Michael Froeba, Matvey Fedin
Summary: This work proposes a new type of mesoporous material that can capture nitrogen monoxide (NO) from air. The material combines a robust silica scaffold and radicals acting as NO traps, making it highly promising for environmental applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Green & Sustainable Science & Technology
Emre Erdem
Summary: The terms clean energy and green energy were revisited in this contribution, with a focus on the Power-to-X (P2X) technology and its potential benefits for renewable energy storage and decarbonization challenges. The main advantage of P2X methods lies in their potential for industrial-scale low-carbon processes and direct energy conversions.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Review
Nanoscience & Nanotechnology
Ameen Uddin Ammar, Ipek Deniz Yildirim, Feray Bakan, Emre Erdem
Summary: The choice of electrode material is crucial for the efficiency of supercapacitor devices, with metal oxides and MXenes emerging as potential candidates. While the discussion of MXenes and ZnO highlights differences in dimensionality regarding defect-driven effects, the volume under the influence of defect centers is expected to differ between bulk and 2D structures.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Shankari Nadupalli, Feng Yan, Emre Erdem
Summary: This study investigates the low-temperature phase transitions observed in magneto-electric bismuth ferrite by connecting recent structural revelations with X-band electron paramagnetic resonance spectra. The research shows the vital role of oxygen vacancies in lattice contraction and spin reorientation, contributing to the anomalies in resonant lines. The phase transitions at 140, 200, and 280 K are explained by changes in interatomic distances, elastic distortion of oxygen octahedra, and freezing of spins in the lattice, respectively.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Mohamad Hasan Aleinawi, Ameen Uddin Ammar, Merve Buldu-Akturk, Nur Selin Turhan, Shankari Nadupalli, Emre Erdem
Summary: Transition-metal-doped ZnO is a potential dilute magnetic semiconductor for spintronic applications. This report presents the synthesis of manganese-doped ZnO using a microwave-assisted hydrolysis technique, and investigates the defect structure via electron paramagnetic resonance and photoluminescence techniques, revealing that Mn2+ dominates the intrinsic defect species in ZnO.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Merve Buldu-Akturk, Maryam Toufani, Ali Tufani, Emre Erdem
Summary: In this study, reduced graphene oxide/zinc oxide hybrid nanocomposites were prepared and investigated for supercapacitor electrodes. The evolution of intrinsic defects and their effects on the properties of the hybrid nanocomposites were studied using electron paramagnetic resonance spectroscopy. The electrochemical analyses showed improved charge transfer performance and ion diffusion in the rGO electrode with the incorporation of ZnO rich in core defects.
Article
Materials Science, Multidisciplinary
Cigdem Tuc Altaf, Nazrin Abdullayeva, Ozlem Coskun, Alihan Kumtepe, Ipek Deniz Yildiri, Emre Erdem, Maochang Liu, Ali Bozbey, Ertan Agar, Mehmet Sankir, Nurdan Demirci Sankir
Summary: By decorating ZnO thin films with different morphologies and materials, significant enhancement in photoelectrochemical water splitting efficiency can be achieved. ZnO NF/CIGS/In2S3 photoelectrodes demonstrated high performance, while ZnO NR/CIGS/In2S3 achieved high photocurrent density. Intensity-modulated photocurrent spectroscopy showed higher charge transfer efficiencies and reduced surface recombination kinetics for decorated ZnO NF.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Physics, Applied
Merve Buldu-Akturk, Oezge Balci-cagiran, Emre Erdem
Summary: This study reports the synthesis and characterization of HfB2 and its application as an electrode for supercapacitors. Point defects were formed in HfB2 through annealing, and the performance of the defective electrode was evaluated using various characterization tools. The results demonstrate that the HfB2 electrode with defects exhibits higher electrochemical performance.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Suna Avcioglu, Merve Buldu-Akturk, Emre Erdem, Figen Kaya, Cengiz Kaya
Summary: Boron carbide powders with nano/micro fibers or polyhedral-equiaxed particles were synthesized using the sol-gel technique. The thermal decomposition duration of the precursors determined the morphology of the synthesized powders. By adjusting the duration, the morphology was successfully tuned from polyhedral-equiaxed to nano/micro fibers. The electrochemical performance of the boron carbide electrodes was significantly influenced by the particle morphology, with the best performance observed in the synergistic effects of polyhedral-equiaxed and nano/micro fiber morphologies.
Article
Chemistry, Multidisciplinary
Seher Guz, Merve Buldu-Akturk, Hasan Gocmez, Emre Erdem
Summary: This study explores the use of organic-inorganic halide perovskites as electrodes for supercapacitors and investigates the impact of optimization parameters on the capacitor performance. The results show that Bi3+-substituted perovskite electrodes exhibit the highest power density, and the fabricated SC devices demonstrate good cyclability.
Article
Electrochemistry
Cigdem Tuc Altaf, Tuluhan Olcayto Colak, Emre Erdem, Ugur Unal, Feray Bakan Misirlioglu, Guglielmo Guido Condorelli, Nurdan Demirci Sankir, Mehmet Sankir
Summary: Photo-supercapacitors (PSCs) can convert and store solar energy into electricity, providing a sustainable solution to reduce reliance on the grid. In this study, a lithiated biphenol-based disulfonated poly (arylene ether sulfone) random copolymer (BPS) membrane was integrated into a PSC to improve efficiency and design. Under UV illumination, the PSC with BPS-Li(+) showed 2.8-fold increase in specific capacitance (Cp) and 2.7-fold increase in energy density (Ed) compared to dark conditions. Additionally, at elevated temperatures and 100% relative humidity, Cp and Ed of the PSC increased to 23.61 Fg(-1) and 47.22 Whkg(-1) at 85 degrees C, respectively, due to the enhanced ionic conductivity of the membrane.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Ameen Uddin Ammar, Feray Bakan-Misirlioglu, Mohamad Hasan Aleinawi, Giorgia Franzo, Guglielmo Guido Condorelli, Fatma Nur Tuzluca Yesilbag, Yasar Ozkan Yesilbag, Salvo Mirabella, Emre Erdem
Summary: In this study, high-performance supercapacitor devices were developed using manganese-doped zinc oxide nanowires and copper-doped zinc oxide nanoparticles as a positive electrode, with MXene as a negative electrode. The performance of transition metal-based electrodes in combination with MXene was found to significantly enhance the supercapacitors' performance. The highest-performance supercapacitor achieved a specific capacitance of 151 F/g, an energy density of 84 Wh/kg, and a power density of 75 kW/kg. The presence of intrinsic and extrinsic defects in the Mn/Cu-doped ZnO was found to optimize the intrinsic properties and improve reaction kinetics, leading to enhanced electrochemical activity and superior supercapacitor device performance.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Energy & Fuels
Ameen Uddin Ammar, Manuela Stan, Adriana Popa, Dana Toloman, Sergiu Macavei, Cristian Leostean, Alexandra Ciorita, Emre Erdem, Arpad Mihai Rostas
Summary: In this study, nanosized Mn-doped WO3-based materials were used as electrode materials for high-performance supercapacitor devices. The defect structure of WO3 was improved by using various Mn concentrations, leading to enhanced electrical properties. Characterization techniques such as EPR and PL spectroscopy revealed the effect of Mn-doping on the defect structure and optical properties of WO3. The presence of Mn4+ ions and oxygen vacancies strongly influenced the electrochemical performance of the electrode material in symmetric supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.
Article
Materials Science, Multidisciplinary
Cigdem Tuc Altaf, Arpad Mihai Rostas, Maria Mihet, Mihaela Diana Lazar, Igor Iatsunskyi, Emerson Coy, Emre Erdem, Mehmet Sankir, Nurdan Demirci Sankir
Summary: This study presents the design of a facile, efficient, and low-cost two-electrode all-solid-state PSC using GO/ZnO NW material. The GO/ZnO NW-based PSC exhibits higher specific capacitance and energy density under UV illumination, as well as excellent stability. The proposed device configuration shows superior performance compared to the rGO/ZnO NW-based PSC.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Shankari Nadupalli, Sergej Repp, Stefan Weber, Emre Erdem
Summary: This study investigates the intrinsic defect structure of ZnO and its influences. The results demonstrate that the concentration and position of intrinsic defects in ZnO can be tuned by changing the nanocrystal size, while emissions can be tuned by post-annealing treatments.
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)