Article
Chemistry, Physical
Subrata Nayak, Anamika Ray, Sumanta Bhattacharya
Summary: This study investigates the molecular complexation of a designed porphyrin with fullerenes, revealing a purely non-covalent interaction with size selective binding. Fluorescence quenching of porphyrin in the presence of C-70 occurs via both static and dynamic quenching pathways in DCB.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Ekaterina N. Ovchenkova, Arshak A. Tsaturyan, Nataliya G. Bichan, Tatyana N. Lomova
Summary: In this study, the basicity thermodynamic parameters of pyridyl/imidazole substituted fullero[60]/[70]pyrrolidines in dichloromethane were obtained and discussed, along with the acid-base reactions of different functionalized C-60 derivatives and a C-70 derivative. The dependencies of pK values on the molecule's chemical structure were shown using Hammett's acidity functions. Quantum-chemical calculations were used to predict the pK(BH+) values of the substituted fullero[60]/[70]pyrrolidines.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Luana Malacaria, Emilia Furia
Summary: It is well known that dissociation constants of organic compounds are indicative of the groups present in them, and acid-base dissociation constants are crucial for understanding the properties of molecules in biological systems. This study aimed to determine the acidic constants of three natural molecules, quercetin, luteolin, and l-ascorbic acid, which are known for their antioxidant properties. The evaluation was conducted in aqueous media at 37 degrees Celsius using a combination of potentiometric and spectrophotometric measurements. The results highlight the importance of using both experimental techniques to obtain accurate acidic constant values and avoid uncertainties related to oxidation reactions.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Organic
Yue Sun, Cheng Qian, Thomas J. Emge, Yanbang Li, William P. Kopcha, Lu Wang, Jianyuan Zhang
Summary: This study reports the oxidative [4 + 2] reaction of o-phenylenediamine-derived disulfonamides with fullerene C-60 and C-70. The reactants with electron deficiency showed high reactivity. The reaction of C-70 exhibited unusual regioselectivity, yielding a [5,6]-adduct as the major product, which was characterized by experimental and computational methods.
Article
Chemistry, Multidisciplinary
Wiebke Haselbach, Jeremy M. Kaminski, Laura N. Kloeters, Thomas J. J. Mueller, Oliver Weingart, Christel M. Marian, Peter Gilch, Barbara E. Nogueira de Faria
Summary: The emitters for TADF-based OLEDs need to have small S-1-T-1 energy gaps and fast ISC transitions. Vibronic mixing with higher excited states S-n and T-n can mediate these transitions. By using time-resolved NIR spectroscopy, it is demonstrated that the energetically located higher states can be found in a prototypical TADF emitter consisting of a triarylamine and a dicyanobenzene moiety (TAA-DCN).
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Takashi Komori, Eiji Tsurumaki, Shinji Toyota
Summary: Acyclic and cyclic acridone-2,7-diyl oligomers were synthesized by an iterative procedure using 10-mesitylacridone as a precursor. The oligomeric chain was elongated using various reactions, resulting in acyclic and cyclic hexamers. The study investigated the influence of chain length and cyclization on the pi-conjugation properties of the oligomers using computational and experimental methods.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
M. M. Makhlouf, M. U. Farooq, Nahla N. Ataalla, Mohamed B. Afifi
Summary: The thin films of VOTPP have nanostructure with intense Soret band in the absorption spectrum, which could be utilized as promising absorbing layers in energy conversion devices. The optical band gap values and other dispersion parameters were determined for VOTPP films, showing indirect allowed electronic transitions.
Article
Chemistry, Physical
Vania Gomes, Ana Sofia Pires, Iva Fernandes, Nuno Mateus, Victor de Freitas, Luis Cruz
Summary: Pyranoflavylium-derived compounds have superior properties compared to their flavylium precursors, making them excellent pH indicators. Among them, the symmetrical phenol-based pyranoflavylium dye shows the greatest color variation and remarkable fluorescence properties within the pH range of food spoilage process.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Ana-Maria Udrea, Andra Dinache, Jean-Marie Pages, Ruxandra Angela Pirvulescu
Summary: The study investigates the potential of BG1189 and BG1190 as efflux pump inhibitors through in silico and molecular docking approaches. The findings suggest that these compounds could be attractive candidates for antimicrobial drugs. UV-Vis absorption spectroscopy and FTIR spectroscopy were utilized to study the stability and effects of laser radiation on the molecules.
Article
Biochemistry & Molecular Biology
Rayane-Ichrak Loughlani, Alonso Gamero-Quijano, Francisco Montilla
Summary: The sol-gel method is a simple technique for electrode modification with silica thin films. By functionalizing the silica pores, the electrical conductivity and reactivity of the films can be enhanced. In this study, ferrocene species were functionalized onto silica thin films, generating a stable composite electrode. The electrochemical results showed that the functionalized film improved the electrochemical response of cytochrome c, suggesting potential applications in redox-controlled release and detection of other redox-active proteins.
Article
Chemistry, Analytical
Andreas Dannhorn, Stephanie Ling, Steven Powell, Eileen McCall, Gareth Maglennon, Gemma N. Jones, Andrew J. Pierce, Nicole Strittmatter, Gregory Hamm, Simon T. Barry, Josephine Bunch, Richard J. A. Goodwin, Zoltan Takats
Summary: A decontamination approach using UV-C light was presented in this study to inactivate clinically relevant pathogens without causing damage to the tissue metabolome and xenobiotics, allowing for the study of the biodistribution of endogenous metabolites. Additionally, spatially integrated abundances of ATR inhibitor ceralasertib from decontaminated human biopsies were determined using DESI-MSI.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Ilaria Berruti, Maria Inmaculada Polo-Lopez, Isabel Oller, Jenny Flores, M. Luisa Marin, Francisco Bosca
Summary: The reactivity of sulfate radicals (SO4 center dot-) against gram-negative and gram-positive bacteria, as well as some Contaminants of Emerging Concern (CECs), was investigated using laser flash photolysis (LFP) technique. The results revealed that SO4 center dot- reacted with cell-wall components of bacteria through a H-abstraction mechanism, while the reaction with aromatic amino acids (AAA) only present in Porins of gram-negative outer-membrane involved electron transfer processes. Moreover, the reactivity of SO4 center dot- towards CECs also followed an electron transfer mechanism. Interestingly, the removal of bacteria and CECs at pilot plant scale by UV-C/SO4 center dot- was consistent with the reactivity determined using LFP.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Uwe Ritter, Andrii Nikolenko, Maksim Alieksandrov, Viktor Strelchuk, Vasyl Chumachenko, Nataliya Kutsevol, Peter Scharff, Yu I. Prylutskyy
Summary: A simple method for preparing highly stable and purified C-70 fullerene aqueous solution (C(70)FAS) is proposed. The study analyzes the structural and optical properties of C-70 fullerenes in water using various spectroscopy methods. The results indicate that the stabilization of C-70 fullerenes in water is likely due to surface hydroxylation. This research provides insights into the stabilization mechanism of C-70 fullerenes in water and their potential application in nanobiotechnology.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Biochemical Research Methods
Gohar A. Shahinyan, Shiraz A. Markarian
Summary: In this study, the effect of dimethylsulfoxide (DMSO) and diethylsulfoxide (DESO) on the binding between quinine sulfate (QS) and DNA was investigated. The results show that the addition of DMSO and DESO does not change the binding mechanism but increases the binding constant, making QS molecules more available for binding with DNA. Moreover, the quantum yield of QS is lower in sulfoxides compared to water.
JOURNAL OF FLUORESCENCE
(2023)
Article
Biophysics
Victoria A. Salo, Anatoly S. Buchelnikov, Maxim P. Evstigneev
Summary: In this study, we conducted a qualitative and quantitative analysis of the intermolecular interactions between the antitumor antibiotic mitoxantrone and C-60 fullerene in aqueous solution, comparing them with interactions between the antibiotic and known aromatic molecules such as caffeine and flavin mononucleotide. We determined the equilibrium hetero-association constants of these interactions using a UV/Vis titration experiment. Particularly, we focused on the interaction between C-60 fullerene and mitoxantrone, which was quantified for the first time. Based on the theory of interceptor-protector action and a set of measured equilibrium constants, we estimated the relative biological effect of these mixtures in a model living system, using human buccal epithelium cells as an example. Our findings showed that C-60 fullerene is able to restore the functional activity of the buccal epithelium cell nucleus after exposure to mitoxantrone, indicating its potential as a regulator of the antibiotic's medico-biological activity.
EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya
CHEMICAL PHYSICS LETTERS
(2015)
Article
Chemistry, Physical
Anamika Ray, Shrabanti Banerjee, Ajoy K. Bauri, Sumanta Bhattacharya
CHEMICAL PHYSICS LETTERS
(2016)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya
CHEMICAL PHYSICS LETTERS
(2016)
Article
Chemistry, Physical
Anamika Ray, Kusumita Kundu, Kshama Kundu, Sandip K. Nayak, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2016)
Article
Spectroscopy
Anamika Ray, Shrabanti Banerjee, Shalini Ghosh, Ajoy K. Bauri, Sumanta Bhattacharya
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2016)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2017)
Article
Chemistry, Physical
Anamika Ray, Apurba De, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2017)
Article
Chemistry, Physical
Anamika Ray, Ajoy Bauri, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Chemistry, Physical
Subrata Nayak, Sneha Paul, Ajoy Bauri, Anamika Ray, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya, Ajoy Bauri
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Chemistry, Physical
Subrata Nayak, Anamika Ray, Sumanta Bhattacharya, Ajoy Bauri, Shrabanti Banerjee
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Chemistry, Physical
Anamika Ray, Sumanta Bhattacharya
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Chemistry, Physical
Subrata Nayak, Anamika Ray, Sumanta Bhattacharya
Summary: This study investigates the molecular complexation of a designed porphyrin with fullerenes, revealing a purely non-covalent interaction with size selective binding. Fluorescence quenching of porphyrin in the presence of C-70 occurs via both static and dynamic quenching pathways in DCB.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Anamika Ray, Sumanta Bhattacharya, Shrabanti Banerjee
Summary: The study found spontaneous interaction between quantum dots and zinc porphyrazine in toluene, causing the quenching of quantum dots' photoluminescence. Time-resolved fluorescence measurements revealed a slight change in the quantum dots' lifetime after interaction with zinc porphyrazine. Evaluation from the stern-volmer plot indicated that the photoexcited quantum dots decayed by zinc porphyrazine through a static quenching mechanism, suggesting potential application of the QD-1 system as an energy storage material in the future.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(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)
