JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
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IF 2
Zheng-En Piao,Jingzhou Guo,Dan Wang,Wei Mao,Yuan Pu,Jian-Feng Chen
2-(4-tert-Butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole (PBD) is one of the most widely used electron transport layer materials in optoelectronic devices, and studies on the solubility of PBD in various solvents are critical for development of solution-processable roll-to-roll electronic devices. In this study, the isothermal saturation method is used to determine the solubility data of PBD in 12 commonly used organic solvents. The experimental solubility of PBD increases gradually with enhanced temperature for the examined temperature range of 283.15–323.15 K in n-hexane, methanol, ethanol, isopropanol, tetrahydrofuran (THF), acetonitrile, ethyl acetate, N-methylpyrrolidone (NMP), toluene, and chlorobenzene, while the temperature ranges were 293.15–333.15 K and 273.15–303.15 K for dimethyl sulfoxide and dichloromethane, respectively. The obtained solubility values of PBD are correlated by three models including the modified Apelblat equation, λh equation, and Yaws equation. Comparison of the calculated Akaike information criterion values resulted in selecting the optimal model for each solvent. Of the five solvents calculated, n-hexane, methanol, toluene, THF, and NMP, the λh equation provides an optimal fit. Both the modified Apelblat equation and the Yaws equation work well in chlorobenzene. Among the other six solvents, the fit of the Yaws equation is the best. These results of solubility provide the basic data for the synthesis of PBD nanoparticles via high-gravity-assisted antisolvent precipitation processing.
研究领域:
材料科学
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化学工程
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物理化学
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光电子学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Hongmin Zhang,Xiaotong Yang,Ying Zhang,Hejie Wang,Aixin Song,Xiao Chen,Hong-Guo Liu
A variety of supramolecular structures of benzene-1,3,5-tricarboxamide derivatives (BTAs), such as helixes and nanosheets , have been fabricated. However, how to regulate the self-assembly behavior through molecular design and control of experimental conditions, and thus to form supramolecular structures with different morphologies is still a topic that needs to be further explored. In this paper, two kinds of BTAs with different end groups, i.e. terpyridine and carboxyl were synthesized, which are referred to as L and A, respectively. Their self-assembly behaviors in DMF/aqueous solution were investigated by adding the DMF solution of BTAs into the aqueous solution dropwise. It was found that the two BTAs exhibited different self-assembly behaviors. L self-assembled into helical nanowires and nanosheets in the mixed media at lower and higher metal ion concentrations. However, A formed multilayer vesicles and nanotubes at lower and higher concentrations of A molecules. Such a difference was ascribed to their different molecular structures and therefore the different amphiphilicity. The more hydrophobic L molecules could escape from DMF droplets and self-assembled with the help of supramolecular interactions. The more amphiphilic A molecules were prone to adsorb at the oil/water interface to form layered films. The relative strength of coordination interaction determined the self-assembly behavior of L and the formation of helical nanowires and nanosheets , and the packing mode of A molecules at the oil/water interface determined the formation of vesicles and nanotubes . In addition, the formed vesicles of A were responsive to pH.
研究领域:
超分子化学
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材料科学
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纳米技术
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产品关联
DOI
高影响因子
Polymers
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2024
·Vol. 16
·期 16
·2289
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IF 4.7
Pingping Tang,Feiyu He
Owing to their potential to transform traditional medical diagnostics and health monitoring, wearable biosensors have become an alternative evolutionary technology in the field of medical care. However, it is still necessary to overcome some key technique challenges, such as the selectivity, sensitivity, and stability of biometric identification. Herein, a novel, wearable electrochemical sensor based on a molecularly imprinted polymer (MIP) integrated with a copper benzene-1,3,5-tricarboxylate metal–organic framework (MOF) was designed for the detection of stress through the on-body monitoring of cortisol in sweat. The MOF was used as the substrate for MIP deposition to enhance the stability and sensitivity of the sensor. The sensor consisted of two layers, with a microfluidic layer as the top layer for spontaneous sweating and a modified electrode as the bottom layer for sensing. The sensor measured cortisol levels by detecting the current change that occurred when the target molecules bound to the imprinted cavities, using Prussian blue nanoparticles embedded in the MIP framework as the REDOX probe. The proposed sensor exhibited a linear detection range of 0.01–1000 nM with a detection limit of 0.0027 nM, and favorable specificity over other analogies. This facile anti-body free sensor showed excellent stability, and can be successfully applied for in situ cortisol monitoring.
研究领域:
医疗诊断
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健康监测
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生物传感器
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材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Shiling Liu,Jingjing Hui,Huandi Li,Yijun Li,Xiwen He,Langxing Chen,Yukui Zhang
In recent years, ion covalent organic frameworks (iCOFs) have shown excellent adsorption performance in the removal of non-steroidal anti-inflammatory drugs (NSAIDs), but powdered iCOFs are faced with problems in separation and recovering from solution and are prone to environmental pollution. In this work, polydopamine (PDA) was used as the mediated coating, Fe 3 O 4 as the magnetic nucleus, and iCOFs consisting of benzene-1,3,5-triscarbaldehyde (BT) and 1,3-diaminoguanidine hydrochloride (DG Cl ) as organic ligands were in-situ grown on the surface of the PDA coating by Schiff base reaction, resulting in a magnetic nanocomposite (Fe 3 O 4 @PDA@BT-DG Cl ) with a coral-like structure. The adsorption kinetics and adsorption isotherms showed that the adsorption behavior of diclofenac sodium (DS) on Fe 3 O 4 @PDA@BT-DG Cl followed the pseudo-second-order kinetic model and Langmuir model, and the maximum adsorption capacity could reach up to 420.17 mg g −1 (25 ℃, pH 5). The adsorption of DS on Fe 3 O 4 @PDA@BT-DG Cl was dominated by electrostatic interactions, along with hydrogen bonding, π-π interactions, and ion exchange, according to the analysis of the adsorption mechanism. The Fe 3 O 4 @PDA@BT-DG Cl consistently maintained high adsorption efficiency after six adsorption–desorption cycles, making it an efficient adsorbent for the removal of NSAIDs in complex water environments.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
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