Article
Biochemistry & Molecular Biology
Zanlin Chen, Haiming Li, Miaojia Xie, Fengguang Zhao, Shuangyan Han
Summary: This study presents a label-free aptamer biosensor based on gold nanoparticles/multi-walled carbon nanotubes @ titanium dioxide (AuNPs/MWCNTs@TiO2) for sensitive detection of malachite green (MG). The nanocomposite provides a large surface area and good electrical conductivity, facilitating aptamer immobilization. The detection is achieved by measuring the change in electrical signal resulting from the detachment of aptamer from complementary chain (cDNA) and binding to MG. Under optimal conditions, the sensor demonstrates good linearity and a low limit of detection (LOD).
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Analytical
Chittatosh Pal, Subrata Majumder
Summary: The feasibility of designing a highly selective and sensitive label-free biosensor for the determination of Hg2+ ions using gold electrodes functionalized with DNA-wrapped carbon nanotubes was examined. The detection limit of 1 femtomolar was achieved, and the method showed good selectivity against common metal cations.
Article
Chemistry, Multidisciplinary
Igors Sokolovs, Nayereh Mohebbati, Robert Francke, Edgars Suna
Summary: In contrast to hypervalent iodine(III) compounds, little research has been done on isoelectronic bromine(III) compounds. A new method for preparing chelation-stabilized lambda(3)-bromanes was presented in this study, demonstrating their synthetic utility in oxidative reactions. The reactivity of stable bromine(III) species can be unlocked by the addition of a Lewis or a Bronsted acid, leading to the formation of C-C, C-N, and C-O bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Jerson Gonzalez-Hernandez, Guillermo Moya-Alvarado, Ana Lorena Alvarado-Gamez, Roberto Urcuyo, Miriam Barquero-Quiros, Maria Julia Arcos-Martinez
Summary: Fentanyl, a synthetic opioid used for severe pain treatment, has become a growing threat to public health due to its increasing illegal recreational use. This study proposes a novel enzymatic biosensor for the rapid and reliable determination of fentanyl in urine samples, using adsorptive-stripping cyclic voltammetry. The biosensor showed high sensitivity, wide linearity range, and low detection limits, making it an efficient device for fentanyl detection.
Article
Chemistry, Physical
Caio Lenon Chaves Carvalho, Gleison de Andrade Rodrigues, Janildo Lopes Magalha, Roberto Alves de Sousa Luz, Everson Thiago Santos Geroncio D. Silva, Welter Cantanhede
Summary: By combining poly-allylamine hydrochloride, Prussian blue nanoparticles, and single-walled carbon nanotubes, novel {PAH vertical bar PB/SWCNTs} architectures were developed. The modified electrode showed characteristic redox processes of PB and high sensitivity in detecting IBP. The interaction and inhibition mechanism between IBP and PB were proposed based on the electrochemical behavior studied.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Rizwan Wahab, Manawwer Alam
Summary: In this study, γ-Al2O3 quantum dots were used as a sensor to detect the organosulfur compound thiourea. The study showed the feasibility and stability of the γ-Al2O3QDs/GCE sensor under different conditions through various experiments and analyses.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
P. Chithra Lekha, Y. Ram Babu, V. T. Fidal Kumar, T. S. Chandra, Somnath C. Roy
Summary: The Ti/ML-TNT/HRP/Nafion (c) sensor device, fabricated using TiO2 multileg nanotubes, exhibits excellent biosensing performance for different concentrations of hydrogen peroxide. Further analysis shows high sensitivity and selectivity towards H2O2 detection, with a wide detection range and low detection limit.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Siavash Nazari, Mehdi Shabani-Nooshabadi, Neda Ziaie
Summary: A highly specific electrochemical sensor was developed for the identification and detection of quetiapine (QTPF). The modification of a carbon paste electrode (CPE) with a nanocomposite of iron, lithium ions, and manganese based on nitro-doped carbon enhanced the limit of detection and identification of QTPF. The nanocomposites were characterized using SEM, XRD, and FTIR. The electrochemical behavior of the drug with the modified electrode was studied using cyclic voltammetry, differential pulse voltammetry, chronoamperometry, and EIS. The sensor showed a linear range of 0.090-900 μM and a detection limit of 0.011 μM.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Ruma Gupta, J. Gamare, M. Sahu, K. Pandey, Santosh K. Gupta
Summary: Nuclear energy is considered a potential alternative for global energy needs, and the study synthesized uranium type (IV) deep eutectic solvent (UT4D) for the first time, showing stability and physical properties at an optimum mole fraction of 0.2:0.8 for UNH: Urea. The formation of deep eutectic solvent (DES) was confirmed using various analytical techniques, and the electrochemical investigation suggested the stabilization of uranium ions in U(V) state in the DES.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Iurii V. Panasenko, Mikhail O. Bulavskiy, Anna A. Iurchenkova, Yenanny Aguilar-Martinez, Fedor S. Fedorov, Ekaterina O. Fedorovskaya, Bjorn Mikladal, Tanja Kallio, Albert G. Nasibulin
Summary: Advancements in supercapacitor performance are driven by both material design and device architecture adjustments. This study focuses on designing unique dead-weight free supercapacitors based on PANI electrochemically deposited on free-standing SWCNT films. The research shows that thin free-standing films of SWCNTs with deposited PANI are less prone to self-discharge, enabling higher gravimetric capacitance values.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Muhammad Shafa, Iqbal Ahmad, Shahid Hussain, Muhammad Asif, Yi Pan, Rustem Zairov, Asma A. Alothman, Mohamed Ouladsmane, Zahid Ullah, Nabi Ullah, Chen Lai, Uzma Jabeen
Summary: A nanoalloy-based electrochemical sensor for H2O2 detection has been fabricated using chemical reduction methodology. The prepared samples were characterized by X-ray diffraction and scanning electron microscopy. Among all the compositions, Ag-Cu (9:1) nanoalloys showed the best performance in detecting H2O2.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Nikos G. Tsierkezos, Eike Felix Reddmann, Uwe Ritter
Summary: In this study, sulfur and nitrogen-doped multi-walled carbon nanotubes (S-N-MWCNTs) were grown on a silicon/silicon oxide wafer using chemical vapor deposition. The S-N-MWCNTs exhibited a bamboo-shaped nanostructure, similar to nitrogen-doped carbon nanotubes. The electrochemical response, electron transfer kinetics, and sensitivity of the S-N-MWCNTs towards ferrocyanide/ferricyanide were found to depend strongly on the concentration of decomposed dimethyl sulfoxide (DMSO) precursor.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Environmental Sciences
Jih-Hsing Chang, Shan-Yi Shen, Cheng-Di Dong, Mohd Shkir, Mohanraj Kumar
Summary: This study investigates various MoO3 morphologies prepared through different methods for detection of H2O2, finding that morphology significantly affects the properties of MoO3 nanostructures. The modified MoO3/Ni-F electrode shows good performance in electrochemical properties and detection applications.
Article
Polymer Science
Ancuta Dinu, Constantin Apetrei
Summary: This study presents the development of a new enzyme sensor for the quantification of tyrosine in pharmaceuticals. The enzyme sensor showed a low limit of detection and high sensitivity, and was validated using infrared spectrometry on pharmaceuticals from different manufacturers.
Article
Engineering, Multidisciplinary
Amany M. Fekry, Shereen M. Azab, Fekria M. Abou Attia, Neveen S. Ibrahim, Gehad G. Mohamed
Summary: The multiwalled carbon nanotubes/Cellulose/Tween (MWCNTs/C/T/MCPE) reformed carbon paste electrode (CPE) was successfully developed as a highly sensitive and easy-to-use electrochemical sensor for the determination of Agomelatine (AGO) in various samples. The sensor displayed high sensitivity and selectivity towards AGO, with additional testing confirming stability, reproducibility, repeatability, interference, and coexistence with dopamine (DA). Further analysis of AGO in Inspago tablets, urine samples, and in the presence of dopamine demonstrated the method's high sensitivity and selectivity.
Article
Thermodynamics
J. N. Zappey, E. E. Moore, O. Benes, J. -c. Griveau, R. J. M. Konings
Summary: In this study, the heat properties of technetium metal were measured and analyzed using various thermal measurement methods, including its superconductivity, zero-degree Debye temperature, electronic heat capacity coefficient, and the standard entropy of the superconducting state.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Pengshuai Zhang, Jixiu Deng, Xiaoyu Jiang, Liang Xu, Yu Huang, Han Sun, Mi Gao, Xianghan Wang, Yulong Gao, Kangning Fan, Lu Zhang, Shuoye Yang
Summary: In this study, the solubility of daminozide in twelve neat solvents was determined using the gravimetrical method. Various models were employed to analyze the experimental solubility, and the miscibility of daminozide in the selected solvents was discussed based on Hansen solubility parameters. The results showed that the dissolution mechanism of daminozide in all solvents was entropy-driven.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Jinju Ma, Hao Wu, Dongxu Yi, Wei Liu, Xinding Yao, Tao Li, Baozeng Ren
Summary: In this study, the solubility and compatibility of Agomelatine in different solvents were investigated through experimental and simulation methods. The results showed that Agomelatine forms more stable hydrogen bonds with alcohol solvents compared to other ester solvents. Additionally, the study analyzed the acidity and basicity characteristics of Agomelatine as well as the reasons for differences in solubility.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Angelica V. Sharapova, Marina V. Ol'khovich, Svetlana V. Blokhina
Summary: This study determined the key physico-chemical properties of cardiovascular carvedilol (CVD) in terms of solubility and distribution coefficients in modeling solvents and biphasic systems. The results showed that the solubility of CVD varied significantly depending on the solvent and pH conditions, and the dissolution process deviated from ideality in saturated solutions.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Wenxi Song, Na Wang, Mingzhe Tan, Meng Wang, Xin Huang, Ting Wang, Hongxun Hao
Summary: The solubility and thermodynamic behavior of climbazole in different solvents were investigated in this study. The results showed that solubility is influenced by temperature and solvent properties. Furthermore, the solvent effect was evaluated and the molecular mechanism behind the solubility behavior was revealed using solvation energy relationship models and molecular simulation methods.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yuqi Su, Weijie Jia, Junshuai Chen, Songtao Cao, Maogang He, Ying Zhang
Summary: This paper presents a novel measurement method based on the finite volume method (FVM) for measuring the concentration-dependent mutual diffusion coefficient D(C) in binary solution. The measurement principle was derived by integrating Fick's second law and establishing discretization equation. The method was validated through experiments and a semi-empirical correlation was built to study the temperature and concentration influences on the diffusion coefficient D.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Bo Tang, Xiaoyu Yao, Xueqiang Dong, Bowen Sheng, Yanxing Zhao, Jun Shen, Maoqiong Gong
Summary: In this study, metal-bellows variable volumetry was used to measure the saturated vapor pressures and critical parameters of R1234ze(Z) and R1336mzz(Z). New vapor pressure correlations were formulated based on the obtained data. The low uncertainties of the measured values indicate the reliability and reproducibility of the data. The results provide important thermophysical data for the use and optimization of R1234ze(Z) and R1336mzz(Z) in HTHP systems.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Vivek Pathania, Ankita Garg, Navneet Kaur, Neha
Summary: The interaction between Isoniazid and beta-cyclodextrin in solutions was investigated to understand the molecular interactions between different components. The results showed that the interaction between Isoniazid and beta-cyclodextrin affected the volume and compressibility of the solutions, and the hydration behavior of Isoniazid in the solutions was influenced by the cosolvent.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Mauricio Vega-Teijido, Marc E. Segovia, Martina Kieninger, Oscar N. Ventura
Summary: A composite chemical model, SVECV-f12, has been developed to accurately reproduce barrier heights of hydrocarbon species. The model successfully corrects systematic errors between experimental and theoretical values and is used for predicting formation enthalpies and hydrogenation/isomerization enthalpies.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kemal Ozcan, Aylin Boztepe, Erdog an Tarcan, Cagatay Tasdemirci
Summary: In this study, the enthalpy of combustion of methane, the main component of natural gas, was measured using a reference gas calorimeter. The experimental results were compared with the values specified in ISO 6976:2016. The average enthalpy of combustion was determined as -55518.2 kJ kg-1 with an error of 0.2%.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Kouki Mekaru, Takuto Miyagi, Ayaka Mishima, Isami Uehara, Ryo Ohmura, Keita Yasuda
Summary: This study investigated the four-phase equilibrium conditions of carbon dioxide + cyclopentane double clathrate hydrate forming systems coexisting with sodium chloride aqueous solution or pure water. The results showed that the double clathrate hydrate is more thermodynamically stable than simple clathrate hydrates under a given sodium chloride concentration.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yameng Wan, Xiaoqiang Gao, Ruiai Wang, Fanfan Li, Yanxun Li, Haixia He
Summary: This study evaluated the solubility of Iminostilbene (IMB) in twelve organic solvents and found that the solubility increased with temperature and showed a specific order in different solvents. The analysis of molecular interactions and solubility parameters provided insights into the dissolution behavior. The UNIQUAC model was used to fit the solubility data, and the thermodynamic properties of the mixing and dissolution processes were thoroughly evaluated.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Yinan Liu, Mingcheng Li, Chunying Zhu, Xiqun Gao, Youguang Ma
Summary: This study successfully prepared amine-based functionalized deep eutectic solvents and investigated the effects of solvent composition, water content, and temperature on the properties of the solvent through density and viscosity measurements. The results contribute to a better understanding of hydration and intermolecular interactions in deep eutectic solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Correction
Thermodynamics
Deepak Parmar, Kavitha Kumari, Naveen Kumar, Manju Rani, Mustapha Sahal, Sanjeev Maken
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
Article
Thermodynamics
Ruslan N. Nagrimanov, Aliya R. Ibragimova, Boris N. Solomonov
Summary: In this study, the heats of solution of hydrocarbons and alcohols with 2-methyltetrahydrofuran are systematically analyzed. Structure-property relationships are developed to calculate the enthalpy of solvation of aliphatic alcohols in 2-methyltetrahydrofuran. Specific interactions in the alcohol-2-methyltetrahydrofuran systems are determined to better understand intermolecular interactions in 2-methyltetrahydrofuran solutions. This research provides valuable insights into the properties and energies of these interactions, facilitating the transition to more environmentally friendly solvents.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2024)
