Article
Chemistry, Inorganic & Nuclear
Gurdeep Kaur, Iqubal Singh, Runjhun Tandon, Nitin Tandon
Summary: This review presents the recent advancements in coumarin-based chemosensors for sensing cations and anions, including the design, performance, and complexation of probes. The colorimetric and fluorescent approach of the probes is elaborated with pictorial representation, along with their detection limits and stoichiometric ratios. The review highlights the potential for developing efficient chemosensors for harmful ions and challenges researchers for commercial applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tang Qian, Dan Feijun, Guo Tao, Lan Haichuang
Summary: A novel quinolinone-coumarin probe QCO was designed and synthesized for the selective detection of Hg2+ in aqueous solution. QCO showed high selectivity and strong anti-interference for Hg2+, and the color changes caused by Hg2+ could be easily observed with the naked eye.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2022)
Article
Spectroscopy
Ting Peng, Sheng Ye, Ruiyuan Liu, Jinqing Qu
Summary: Excessive residual hydrogen peroxide (H2O2) disinfectant in food is harmful to human health. Efficient detection methods for H2O2 detection are necessary. In this study, five D-A molecules 3a-3e were designed and synthesized to find suitable probes for H2O2 detection. Two promising probes, 3a and 3c, were identified based on structure-property relationships. These probes showed colorimetric and fluorescent signals towards H2O2 with low detection limits and rapid response. The reaction mechanism and regulation mechanism of structure adjustment on probe performance were studied. A smartphone RGB analysis was utilized for the quantitative detection of H2O2 without complicated instruments. The probes were also applied to detect H2O2 in milk samples, HepG-2 cells, and zebrafish, indicating promising applications in food samples and physiological systems.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Qi Zhao, Wenxin Gou, Xueting Zhang, Mengyuan Zhang, Yanru Bu, Lijun Wang, Lei Hu, Wenli Yao, Zhengquan Yan
Summary: The combination of silver sulfide nanoparticles and graphene oxide enabled the naked-eye detection of toxic Hg2+ with high sensitivity and selectivity. The detection method showed a detection limit of 9.8 x 10(-9) mol/L, accurate recovery rates of 97.0-101.8%, and a low standard deviation of less than 3.3%.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Kaiyu Zhang, Qinxing Sun, Changxu Lin, Weina Li
Summary: This paper presents a method for selectively detecting Hg2+ ions using wettability tunable surfaces and silver nanoparticles. By controlling the concentration of AgNPs, the surface wettability can be regulated, leading to changes in contact angle. The addition of Hg2+ ions causes a significant decrease in contact angle, accompanied by a color change on the surface.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Applied
Jian-Peng Hu, Qi Lin, Hong Yao, You-Ming Zhang, Tai-Bao Wei
Summary: A colorimetric and fluorometric sensor (RA) has been developed using a simple Schiff base reaction, which enables effective and simultaneous detection of multimetal ions. It shows ultra-sensitive detection limit for heavy metal mercury ions.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Hayriye Nevin Genc, Ozlem Guctekin Yasar, Sukriye Nihan Karuk Elmas, Fatma Nur Arslan, Ibrahim Yilmaz, Abdulkadir Sirit
Summary: We fabricated a new rhodamine-based switch-on fluorescent and colorimetric chemosensor (RHEN) for the determination of Hg2+. The RHEN showed a noticeable colorimetric response for the presence of Hg2+, changing from colorless to pink under daylight. The fluorescence intensity of RHEN was remarkably enhanced and the color changed to dusty rose under UV light when exposed to Hg2+. The RHEN exhibited excellent sensitivity, specificity, and selectivity for Hg2+ detection, with a low detection limit of 0.11 μm. The binding phenomenon between RHEN and Hg2+ was identified using various spectroscopic techniques. Moreover, RHEN was successfully applied for Hg2+ detection in fish samples, as well as for test-paper and cotton swab applications. Smartphone application demonstrated that RHEN can serve as a powerful tool for on-site sensing of Hg2+ without the need for complicated devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Spectroscopy
Xiao-Lei Xue, Yang Wang, Hao Zhang, Shaojin Chen, Shu-Yan Niu, Lingyun Cui, Kun-Peng Wang, Zhi-Qiang Hu
Summary: Biothiols such as cysteine, homocysteine, and glutathione, which are important in life activities, have been the subject of recent research on their quantitative tracking and analysis in living organisms. A fluorescent probe called COUN was designed and synthesized for the color recognition of cysteine, homocysteine, and glutathione. The probe specifically recognized homocysteine, showing significant fluorescence enhancement. Moreover, the probe showed good linear relationships with different concentrations of cysteine, homocysteine, and glutathione.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Nanoscience & Nanotechnology
Lei Shao, Jidong Zhang, Yu Fu, Junyi Chen
Summary: Convenient and sensitive trace water indication is achieved using a flower-like metal-organic framework Cu-FMM. The Cu-FMM can reversibly change its coordination structure with the capture and loss of water molecules, enabling naked-eye colorimetric indication of trace water. The Cu-FMM exhibits a recognizable color change when exposed to the atmosphere or solvent with trace water, with a low detection limit of RH 3% and a water content of 0.25 parts per thousand (v/v). The multi-scale pore structure of Cu-FMM contributes to a fast and reversible response, outperforming traditional coordination polymer humidity sensors. This study provides insights for the design of sensitive and practical naked-eye water indicator materials for in situ and continuous monitoring in industrial processes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Paula M. Castillo, Francisco J. Fernandez-Acejo, Jose M. Carnerero, Rafael Prado-Gotor, Aila Jimenez-Ruiz
Summary: The study utilizes the stabilizing effect of lysozymes to develop a quick naked-eye test for detecting urinary lysozyme concentrations over 57.2 μg/mL. By calculating color difference parameters, the test can reliably provide a positive colorimetric response in less than 15 minutes, making it useful for detecting disorders such as leukemia-associated lysozymurias.
Article
Spectroscopy
Hongqi Li, Jiayin Li, Zhixiu Pan, Tao Zheng, Yanxi Song, Jian Zhang, Zhongwen Xiao
Summary: A novel thionocarbonate-coumarin-thiourea triad-based probe with dual recognition sites was developed for sensing Hg2+ ions. The probe exhibited both fluorogenic and chromogenic sensing performance, with a 70-fold increase in fluorescence intensity upon the addition of Hg2+. It showed excellent selectivity and sensitivity for Hg2+ compared to other common metal ions, and had a linear response range from 0-40 μM with a LOD of 0.12 μM.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Inorganic & Nuclear
Shuyue Ma, Kang-Nan Wang, Miaomiao Xing, Fei Feng, Qiling Pan, Duxia Cao
Summary: A coumarin derivative CBE fluorescent chemosensor was developed for efficient detecting H2O2 in living cells through boronic ester elimination. The probe can specifically recognize H2O2 with high sensitivity and selectivity, providing a rapid response and detection within 16 minutes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Polymer Science
Emilia Hola, Alicja Gruchala, Roman Popielarz, Joanna Ortyl
Summary: Five novel 4,6-diphenyl-2-pyrrol-1-yl-benzene-1,3-dicarbonitrile derivatives were synthesized and investigated as fluorescent sensors for photopolymerization processes, providing a visible and direct strategy to monitor the process. These compounds were found to be effective for free-radical and cationic photopolymerization, as well as for the production of photocurable coatings.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Analytical
Tahereh Rohani Bastami, Mansour Bayat, Roberto Paolesse
Summary: In this study, a novel and facile colorimetric assay based on Au@AgNPs as a chemosensor for the naked-eye detection of morphine was developed. The aggregation of Au@AgNPs upon exposure to morphine resulted in a visible color change from light-yellow to brown. The method showed excellent stability, selectivity, prompt detection, and cost-effectiveness.
Article
Biochemistry & Molecular Biology
Catia D. F. Martins, M. Manuela M. Raposo, Susana P. G. Costa
Summary: Industrial activity has caused widespread metal ion pollution, leading to concerns for ecosystems and human health. Therefore, it is crucial to develop sensors that can selectively and sensitively detect these analytes. In this study, an azo dye, Dabcyl 2, was synthesized and tested for its ability to detect metal ions with environmental and industrial relevance. The results showed that chemosensor 2 had a selective response for Pd2+, Sn2+ and Fe3+, with a visible color change and significant shifts in the UV-Vis spectrum.
Article
Chemistry, Applied
Beatriz Sepulveda, Derin Benites, Laura Albornoz, Mario Simirgiotis, Olivio Castro, Olimpo Garcia-Beltran, Carlos Areche
Summary: This study reports a green extraction method for lichen substances from Hypotrachyna cirrhata using ethyl lactate and high power ultrasounds. The results showed that ethyl lactate can be a sustainable alternative to toxic solvents like methanol, and also demonstrated higher antioxidant activity.
NATURAL PRODUCT RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Laura Albornoz, Alfredo Torres-Benitez, Miguel Moreno-Palacios, Mario J. Simirgiotis, Saul A. Montoya-Serrano, Beatriz Sepulveda, Elena Stashenko, Olimpo Garcia-Beltran, Carlos Areche
Summary: In this study, hyphenated liquid chromatography with high-resolution mass spectrometry was used to analyze the metabolomes of eleven species of Sticta lichens. Chemical markers for fast identification of Sticta lichens were identified for the first time. The study also compared chemical compounds and traditional morphological traits in the study of ancestor-descendant relationships in the genus, and found inconsistencies between the two methods.
Article
Multidisciplinary Sciences
Karen Gomez, Franklin Quenguan, Diego Aristizabal, Gustavo Escobar, Winston Quinones, Olimpo Garcia-Beltran, Diego Durango
Summary: MeJA treatment increases isoflavonoid levels in leguminous plants, but high concentrations of MeJA have deleterious effects on seedlings. Coronatine and indanoyl derivatives show significant elicitor effects on isoflavonoids, even surpassing known elicitors.
Article
Medicine, Research & Experimental
Karina Sierra, Jean Paulo de Andrade, Luciana R. Tallini, Edison H. Osorio, Osvaldo Yanez, Manuel Isaias Osorio, Nora H. Oleas, Olimpo Garcia-Beltran, Warley de S. Borges, Jaume Bastida, Edison Osorio, Natalie Cortes
Summary: This study isolated and described the alkaloids of Zephyranthes carinata Herb., finding galanthine as the main component with significant inhibitory activity against acetylcholinesterase. Molecular dynamics analysis revealed that galanthine interacts with the peripheral anionic binding site of the enzyme, preventing the entrance and exit of molecules from the active site. This research provides important information for the search of new cholinesterase inhibitors by identifying unknown bio-interactions between bioactive compounds and biological targets.
BIOMEDICINE & PHARMACOTHERAPY
(2022)
Article
Chemistry, Multidisciplinary
Jackson J. Alcazar, Edgar Marquez, Luis Garcia-Rio, Agustin Robles-Munoz, Angelica Fierro, Jose G. Santos, Margarita E. Aliaga
Summary: This study investigated the influence of cucurbit[7]uril (CB7) on dyes with multiple basic sites. The experimental results showed significant shifts in the UV-vis spectra of the dyes in the presence of CB7, indicating that CB7 promotes the formation of certain protomers.
FRONTIERS IN CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Juan David Figueroa, Eduardo Fuentes-Lemus, Juan Sebastian Reyes, Matias Loaiza, Margarita E. Aliaga, Angelica Fierro, Fabian Leinisch, Per Hagglund, Michael J. Davies, Camilo Lopez-Alarcon
Summary: This study investigated the effects of peroxyl radicals and peroxynitrite on the activity and structure of Leuconostoc mesenteroides glucose 6-phosphate dehydrogenase (G6PDH). The results showed that ROO• induced changes in the secondary structure of G6PDH and decreased enzymatic activity, while ONOO- caused oxidation of critical residues resulting in enzyme inactivation. These two oxidant systems have markedly different effects on the structure and activity of G6PDH.
FREE RADICAL BIOLOGY AND MEDICINE
(2022)
Article
Chemistry, Applied
Grover Castaneta, Beatriz Sepulveda, Reinaldo Vargas, Olimpo Garcia-Beltran, Mario Simirgiotis, Carlos Areche
Summary: This study isolated and purified lichen substances from Usnea cornuta using conventional solvents, green solvents, and green technologies. By using UHPLC/ESI/MS/MS, several lichen compounds were identified, and the quantification of usnic acid, diffractaic acid, and galbinic acid was performed. The extraction properties and antioxidant capacities of limonene, ethyl lactate, and methanol were compared, and the results showed that ethyl lactate could replace methanol as a more sustainable green chemistry method with similar antioxidant capacity.
NATURAL PRODUCT RESEARCH
(2023)
Article
Chemistry, Physical
Camilo Segura, Osvaldo Yanez, Antonio Galdamez, Victoria Tapia, Marco T. Nunez, Igor Osorio-Roman, Camilo Garcia, Olimpo Garcia-Beltran
Summary: A new Rhodamine-based fluorescent probe, WGB, was synthesized and shown to selectively detect Cu2+ in cells. Both experimental and theoretical calculations confirmed the selectivity, and epifluorescence microscopy demonstrated successful imaging of Cu2+ in cells treated with WGB.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Neurosciences
Belinda Fouche, Stephanie Turner, Rebecca Gorham, Eloise J. Stephenson, Simon Gutbier, Joanna L. Elson, Olimpo Garcia-Beltran, Francois H. van der Westhuizen, Ilse S. Pienaar
Summary: This study demonstrates the neuroprotective potential of a new polyhydroxyl coumarin, CT51, against the mitochondrial toxin MPP+. CT51 preserves neural function and circuitry against PD-related damage by targeting cell bodies and axons, restoring somatic cell viability and neurite processes. Additionally, CT51 acts as an antioxidant agent and downregulates the expression of HIF-1 alpha, providing further protection against oxidative stress.
MOLECULAR NEUROBIOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Kevin Droguett, Guillermo E. Quintero, Jose G. Santos, Margarita E. Aliaga
Summary: This Review Article discusses the advances made in the past two decades in the field of organic modulation reactivity by supramolecular hosts, specifically focusing on members of the cucurbit[n]urils family. The use of CB[6], CB[7], and CB[8] is shown to have exceptional recognition properties in aqueous medium, suitable size, hydrophobic cavity, and polarity portals, thus allowing for modification of reactivity in a variety of reactions. The article highlights the chemical properties of CB[n] and their effects on the reactivity of organic guests, showcasing examples of both catalysis and inhibition processes from a kinetic and thermodynamic perspective.
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
(2022)
Review
Biochemistry & Molecular Biology
Olimpo Garcia-Beltran, Pamela J. Urrutia, Marco T. Nunez
Summary: Protein aggregation, mitochondrial dysfunction, iron dyshomeostasis, increased oxidative damage and inflammation are common features of Parkinson's disease and other neurodegenerative disorders. Current treatments aim to relieve symptoms, but no treatments to stop disease progression are available. The use of multifunctional compounds to target key components of neurodegeneration has been proposed. This review discusses the molecular basis of Parkinson's disease and clinical trials using single-target drugs, as well as the potential of multifunctional compounds for treatment.
Article
Materials Science, Multidisciplinary
Luis Fabian Urrego, Olimpo Garcia-Beltran, Nelson Arzola, Oscar Araque
Summary: Aluminium alloy (AA2024-T4) is widely used in the aerospace industry due to its good machinability and strength/weight ratio. In this study, AA2024-T4 was used to build a pilot plant for producing biological extracts and nano-encapsulated bioproducts for phytosanitary control in Cacao crops. The mechanical design of the bolted support joints required an understanding of the material's fatigue performance. Simulation results showed that the specimen with a 30 mm stress concentrator had the highest stress intensity factor of 460 MPa.mm(0.5) and the longest crack length of 53 mm. A mathematical model was developed to calculate the geometric correction constant (Y) based on these simulation data.
Article
Chemistry, Physical
Jackson J. Alcazar, Luis Garcia-Rio, Agustin I. Robles, Luis Dinamarca-Villarroel, Angelica Fierro, Jose G. Santos, Margarita E. Aliaga
Summary: The effect of cyclodextrins inclusion on Stokes shifts and emission quantum yield of 3-styryl aza-coumarin dyes (SACs) was studied both experimentally and theoretically. The emission quantum yield was found to be related to the calculated binding constants. Supramolecular inclusion was confirmed by fluorescence spectra changes, high-resolution mass spectrometry, and molecular dynamics studies. The binding constants of 2,6-di-O-methyl-β-cyclodextrin (DM-b-CD) were higher than those of β-cyclodextrin (b-CD), resulting in up to a 6-fold increase in emission quantum yield for the SACs. Additionally, a linear negative correlation was observed between the Stokes shift and the emission quantum yield. This relationship was attributed to the influence of cyclodextrins on a unique intramolecular rotation and charge transfer phenomenon in the dyes, supported by density functional theory calculations.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Angie C. Forero-Giron, Denis Fuentealba, Nory Marino-Ocampo, Soledad Gutierrez-Oliva, Barbara Herrera, Alejandro Toro-Labbe, Eduardo Fuentes-Lemus, Michael J. Davies, Margarita E. Aliaga, Camilo Lopez-Alarcon
Summary: The stable inclusion complex of AAPH with CB7 can generate high yields of peroxyl radicals, making it useful for studying these species in various fields such as material, environmental, and biomedical sciences.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Sebastian Almendras, Ana Maria Zarate, Luis Dinamarca-Villarroel, Daniel Guerra, Denis Fuentealba, Jose M. Eltit, Margarita E. Aliaga, Angelica Fierro, Edwin G. Perez
Summary: This study investigated the supramolecular binding behavior of APP(+) and CB[7] in aqueous solution, as well as their cytotoxic effects on HEK293 cells. The results demonstrate that CB[7] can protect cells from the cytotoxicity of APP(+) by forming a complex that reduces the harmful impact of APP(+) on the cells.
NEW JOURNAL OF CHEMISTRY
(2022)
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)
