Article
Biochemistry & Molecular Biology
Krystian Galecki, Agnieszka Kowalska-Baron, Katarzyna E. Nowak, Anna Gajda, Beata Kolesinska
Summary: This study demonstrates the utility of time-resolved fluorescence spectroscopy in detecting subtle changes in the microenvironment of tryptophan chromophore in AOT reverse micelles. The results show evident changes in spectral characteristics and fluorescence decay kinetics when tryptophan and its peptides are inserted into micelles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Hernan Martinelli, Elisamaria Tasca, Patrizia Andreozzi, Sara Libertone, Hernan Ritacco, Mauro Giustini, Sergio E. Moya
Summary: The study explores the polarity at the single polyelectrolyte layer level inside PEMs using DX, and finds that different polar environments may be present in a PEM due to variations in charge compensation between layers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Biochemical Research Methods
Dairo A. Rendon, Juan L. Palacio
Summary: This study identifies the pros and cons of relevant L-format devices for measuring steady-state fluorescence polarization/anisotropy and develops a modern, simple, and economical L-format accessory for recording fluorescence anisotropy. The device is compatible with most commercial fluorometers and LabVIEW tools are utilized for signal recording.
ANALYTICAL BIOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jingjing Gao, Theeraphop Prachyathipsakul, S. Thayumanavan
Summary: Protein sensing strategies with multichannel readout approach are outlined for detecting two different proteins using supramolecular strategy, resulting in specific protein sensing through fluorescence enhancement.
CHEMICAL COMMUNICATIONS
(2021)
Article
Optics
M. I. N. G. J. I. A. Shangguan, Z. H. I. F. E. N. G. Yang, M. I. N. G. Y. U. Shangguan, Z. A. I. F. A. Lin, Z. H. U. O. Y. A. N. G. Liao, Y. I. R. U. I. Guo, C. H. U. A. N. Liu
Summary: The detection of oil in water is crucial for maintaining underground infrastructures such as oil pipelines. Oceanic lidar has shown great potential for remote sensing of optical properties and subsea materials. However, its high power consumption and bulkiness hinder its deployment underwater for oil monitoring. To tackle this issue, a compact single-photon Raman lidar was developed, utilizing a high quantum efficiency and low dark noise single-photon detector. Through experimental demonstration, the lidar successfully detected underwater oil with different thicknesses up to 12 meters, suggesting its potential for inspecting underwater oil pipelines.
Article
Biochemical Research Methods
Gilad Yahav, Shweta Pawar, Yitzchak Weber, Bar Atuar, Hamootal Duadi, Dror Fixler
Summary: Wide-field measurements of time-resolved fluorescence anisotropy (TR-FA) provide valuable information about the rotational mobility of fluorophores and have potential applications in cellular imaging and biochemical sensing. This study extends the existing fluorescence lifetime imaging microscopy (FLIM) to include TR-FA imaging (TR-FAIM), and applies it to the study of CD-gold nano conjugates. The results show significant changes in FLT, r, and. due to the attachment of gold nanoparticles to CDs.
JOURNAL OF BIOMEDICAL OPTICS
(2023)
Article
Multidisciplinary Sciences
Evgeny A. Shirshin, Marina V. Shirmanova, Alexey V. Gayer, Maria M. Lukina, Elena E. Nikonova, Boris P. Yakimov, Gleb S. Budylin, Varvara V. Dudenkova, Nadezhda I. Ignatova, Dmitry V. Komarov, Vladislav V. Yakovlev, Wolfgang Becker, Elena V. Zagaynova, Vladislav I. Shcheslavskiy, Marlan O. Scully
Summary: The heterogeneity of cells determines their response to external factors, and the metabolic heterogeneity of tumor cells is of clinical relevance. Fluorescence lifetime imaging (FLIM) is a non-invasive technique that can sense and quantify cellular metabolism by measuring the fluorescence decay parameters of endogenous fluorophores. This study demonstrates the unique capability of FLIM in accurately discriminating metabolic heterogeneity using a non-parametric analysis approach, which has been validated in cultured cancer cells treated with chemotherapy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Spectroscopy
Susu Liu, Jinfeng Xia, Danyu Jiang, Qiang Li, Xin Pan, Xueting Dong, Jiuxia Wang, Yue Liu, Yuchen Dong
Summary: In this study, a fluorescent probe based on Eu(III)-doped yttrium hydroxide nanosheets was designed for the sensitive detection of human serum albumin (HSA). The probe was sensitized by α-thiophenformyl acetone trifluoride as an antenna. The fluorescence properties of the nanosheet probe showed linear and selective enhancement of Eu(III) emission intensity with consecutive addition of HSA, and the lifetime signal was enhanced with increasing concentration. UV-visible, fluorescence, and infrared spectral analyses confirmed that the nanosheet probe is a highly sensitive and selective tool for detecting HSA concentration with a high intensity and a large lifetime change.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Biochemistry & Molecular Biology
Chiara Montali, Stefania Abbruzzetti, Arne Franzen, Giorgia Casini, Stefano Bruno, Pietro Delcanale, Sandra Burgstaller, Jeta Ramadani-Muja, Roland Malli, Thomas Gensch, Cristiano Viappiani
Summary: S-Nitrosylation of cysteine residues is an important molecular mechanism for post-translational regulation of proteins, and the sensitivity of fluorescent proteins to nitric oxide has been discovered, which is of great significance for cell biology research.
Article
Chemistry, Physical
Weidi Xia, Li Li, Yongbin Hua, Faling Ling, Yongjie Wang, Zhongmin Cao, Sha Jiang, Guotao Xiang, Xianju Zhou, Jae Su Yu
Summary: This study synthesized Sr2InSbO6 phosphors with good temperature sensing performances and found that the optimal doping concentration was 3%, resulting in significant temperature sensitivities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Applied
Yuxuan Zan, Yazhuo Kang, Bowei Wang, Siqian Cui, Zhuoyao Shen, Jiahui Shu, Xiangjin Kong, Ligong Chen, Xilong Yan, Yang Li
Summary: 2,4,6-Trinitrophenol (TNP) is an important and widely used chemical in industry. Due to its high toxicity, flammability, and explosive nature, even trace amounts of TNP can pose potential threats to ecosystems and human security. Therefore, it is crucial to establish a rapid and reliable method for TNP detection. In this study, a novel amphiphilic fluorescent probe, TPE-CD, was successfully designed and synthesized. TPE-CD exhibited excellent sensitivity and selectivity towards TNP, making it a promising tool for TNP detection.
Article
Materials Science, Ceramics
Zhiyu Zhang, Jingjing Tang, Minkun Jin, Yuexin Li, Wang Chen, Changheng Chen, Jinmeng Xiang, Chongfeng Guo
Summary: Non-invasive photo-thermal therapy (PTT) with accurate temperature monitoring is important for effective cancer treatment. This study developed dual-function photothermal agents YVO4: Nd3+, Yb3+@IR-780 with real-time temperature control and excellent photothermal conversion. The temperature detection behavior based on fluorescence intensity ratio (FIR) and fluorescence lifetime thermometry were investigated. Results showed the potential application of these photothermal agents in photothermal therapy.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Xiao Liu, Siqi Shi, Kai Yang, Liang Chen, Degang Deng, Shiqing Xu
Summary: SrGa2B2O7: Bi3+, Eu3+ phosphors were successfully synthesized through high temperature solid-state method, with their structure, luminescent characteristics and temperature sensing properties studied. The phosphors exhibited high absolute and relative temperature sensitivity, making them a promising optical thermometric material for temperature sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Esther R. S. Paz, Victoria G. Isoppo, Fabiola S. dos Santos, Luana A. Machado, Rossimiriam P. de Freitas, Henrique C. Silva, Otavio A. Chaves, Bernardo A. Iglesias, Fabiano S. Rodembusch, Eufranio N. da Silva
Summary: Fluorescent lapachones were synthesized from the natural product lapachol obtained from Tabebuia sp. Photophysical studies showed strong absorption and fluorescence emission in different solvents. The imidazole compounds showed a selective response to bisulfite ions and have potential applications in biological systems. The interaction of these compounds with human or bovine serum albumin was weak, with different binding regions depending on the nature of the previously complexed metabolite or drug.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Jiajun Chen, Zhinan Fan, Chi Zhang, Huatian Duan, Li-Juan Fan
Summary: A fluorescence sensing system based on an amphiphilic conjugated polyelectrolyte was successfully constructed to detect neomycin, a common antibiotic in the environment and food. The system showed excellent sensing performance towards neomycin at a neutral pH value, with a blue-to-green fluorescence color change observed by the naked eye. The mechanism study confirmed that polymer aggregation played a crucial role in inducing the visually fluorescent color change.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Sucharita Dey, Ankita Saha, Prince Kumar, Chirantan Kar, Sandipan Chakraborty, Pradip K. Sukul
Summary: Picric acid is a dangerous environmental pollutant due to its high solubility in water, posing threats to the environment and public health. The synthesis of water soluble 1,8-naphthalimide (ANDI) and its multimodal sensing applications for nitro explosives such as picric acid (PA) has shown high selectivity and sensitivity, making it a potential material for low cost and light weight explosive sensors in the future.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Review
Chemistry, Inorganic & Nuclear
Utsab Manna, Gopal Das, Md Alamgir Hossain
Summary: This review provides a comprehensive assessment of examples of neutral receptors binding fluoride, focusing on the structural aspects. It discusses the selective solid-state capture of fluoride by various receptors and also briefly mentions the fluoride selective sensing in solution state.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Environmental Sciences
Deepa Sachan, Arnab Ghosh, Gopal Das
Summary: Salvinia minima proved to be an effective biosorbent for the selective removal of cationic dyes and heavy metal ions. The experimental conditions greatly influenced the adsorption process, and the maximum adsorption capacity for the dyes and heavy metal ions was determined.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Asesh Das, Gopal Das
Summary: This report discusses the specific colorimetric and fluorometric sensing of HSO3- by a pair of chemodosimetric probes, showing excellent responses, selectivity, and detection limits. The reliability of selective sensing was ensured through verification of activated exo-cyclic C=C double bonds. The probes have a wide range of applications, including paper-strip analysis and detection of HSO3- in real environmental samples.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Sagnik De, Gopal Das
Summary: This study compares the aggregation-induced emission properties of two naphthalimidetethered amphiphile and non-amphiphile molecules. It demonstrates that these molecules exhibit intense emission signals in aqueous media and can mimic natural light-harvesting processes, as well as have potential analytical applications in detecting explosives.
Article
Chemistry, Multidisciplinary
Aakanksha Agarwal, Sampathkumar Jeevanandham, Chirantan Kar, Monika Prakash Rai, Vinod Kumar, Himadri B. Bohidar, Subhrajit Biswas, Monalisa Mukherjee
Summary: Naturally occurring bioactive compounds have garnered significant attention for their potential in various technological, economic, and healthcare applications. However, their synthetic production faces challenges such as high extraction costs and low yields. This study addresses these issues by developing a hybrid system that combines green microalgae and carbon-based nanomaterials, resulting in enhanced microalgal growth and increased production of bioactive compounds. The novel hybrid system exhibited promising results in terms of lutein production and improvements in microalgal biomass and chlorophyll a and carotenoid production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Sagnik De, Oiyao Appun Pegu, Gopal Das
Summary: We designed three amphiphilic substituted urea compounds with different chain lengths. These hydrophobic amphiphiles exhibited aggregation-induced emission upon solvent switching. Microscopy was used to provide detailed information about the aggregates. The hydrophobicity of these AIEgens was utilized to create water-repelling fluorescent surfaces. The AIEgen, through photoinduced electron transfer-mediated mechanism, has been employed for the detection of nitroantibiotics. The analytical usefulness of the AIEgen in detecting nitroantibiotics in biofluids is being demonstrated.
Article
Chemistry, Applied
Partha Protim Bakal, Gopal Das
Summary: Potassium carbonate-activated biochar derived from Ricinus communis and Colocasia esculanta stems exhibited efficient removal of Cd2+ and Pb2+ from synthetic wastewater. The adsorption parameters and mechanisms were studied, with the findings indicating that biosorption followed the Freundlich isotherm and the pseudo-second-order kinetic model, and involved physical adsorption. The optimum conditions for Cd2+ and Pb2+ removal were determined, and the adsorption capacity was found to be 55 mg g(-1) for Cd and 76 mg g(-1) for Pb. Thermodynamics showed spontaneous and endothermic adsorption, and desorption studies indicated recyclability up to 5 cycles. These results highlight the potential of RCSB and CESB for efficient removal of heavy metal ions from aqueous environments.
JOURNAL OF WATER CHEMISTRY AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Partha Protim Bakal, Gopal Das
Summary: In this study, low-temperature Ricinus communis stem-activated biochar (RCSB) was synthesized using chemical activation and heating method. The RCSB showed high selective adsorption capability for methylene blue and malachite green, and can be regenerated for reuse. The novelty of this work lies in the low synthesis temperature and cost-effectiveness of the biochar.
WATER CONSERVATION SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Oiyao Appun Pegu, Rubi Moral, Gopal Das
Summary: The dipodal monourea anion receptors BPU-1 and BPU-2 can interact with various geometries of anions. BPU-1 selectively senses SO4 2-/HSO4 - in the aqueous medium, and both receptors undergo anion-induced intramolecular cyclization in the presence of F-/HO-.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Applied
Rubi Moral, Oiyao Appun Pegu, Gopal Das
Summary: Three receptors (L1-3) based on 4-(dimethylamino)cinnamaldehyde were prepared to investigate the influence of aromatic core substitution on self-assembly behavior. The receptors demonstrated different micro/nanostructures depending on solvent polarities and hydrogen-bonding abilities, which significantly affected the supramolecular self-assembly process. The selective sensing of picric acid among nitro-aromatic compounds, known for its high explosiveness, was thoroughly studied in both solid and solution states by the receptors, along with their mechanistic details. Real water samples were used to demonstrate the practical utility of this study, including economical paper-strip applications.
Review
Chemistry, Multidisciplinary
Megha Basak, Gopal Das
Summary: Fresh air and clean water are crucial for humans, fauna, and flora. Due to the high toxicity and widespread presence of NACs and VOCs in the environment, the development of chemosensors for these contaminants has gained significant attention. This review focuses on the latest advancements in fluorescent chemosensors, specifically small molecular frameworks, for NACs and VOCs from 2015 to 2022. The detection methods on various platforms and their potential applications in natural water bodies, vapor phase, and paper strip analysis are also discussed.
Article
Chemistry, Multidisciplinary
Megha Basak, Gopal Das
Summary: A versatile bifunctional probe, L-1, was developed for visualizing and quantitatively analyzing Hg2+ and GSH separately in water. Probe L-1 showed rapid sensing towards Hg2+ (LOD = about 17.35 ppb) and GSH (LOD = about 25.83 ppb) with a significant turn-on fluorescence response and red-shifted emission maxima. The sensing strategy was successfully applied to detect Hg2+ and GSH in contaminated natural water, simulated physiological media, and real biological samples. Affordable test strips for visual and quantitative detection of Hg2+ and GSH may have great potential for rapid preliminary environmental monitoring.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Sagnik De, Gopal Das
Summary: We designed five propellor-shaped molecules based on the quinoxaline scaffold with functional group variation. These molecules exhibit aggregation-induced emission and their responses to different solvents were studied spectroscopically and microscopically. The aggregation facet was analyzed in both solid and solution states. Notably, one of the molecules, L-2, showed specific interaction with a cationic surfactant unlike the other congeners which proceeded via disaggregation. Real sample analysis on freshwater and waste effluent samples demonstrated the analytical and environmental significance of these molecules.
Article
Chemistry, Multidisciplinary
Rubi Moral, Oiyao Appun Pegu, Gopal Das
Summary: This study reports the aggregation and sensing properties of two neutral benzimidazole-based urea receptors. R1 exhibits aggregation-induced emission (AIE) properties, while R2 shows typical aggregation-caused quenching (ACQ) behavior. Both R1 and R2 can sense SO42-/HSO4- in an aqueous medium, although with different binding affinities.
NEW JOURNAL OF CHEMISTRY
(2023)
