JOURNAL OF MOLECULAR STRUCTURE
·
2017
·
IF 1.753
Kai Chen,Jing Xu,Sheng-Chao Qiu,Yuan Wang,Min-Dong Chen,Yun-Qian Zhang,Xin Xiao,Zhu Tao
We investigated the interactions in an inverted cucurbit[6]uril ( i Q[6]) with a series of 1, ω -alkyldimins and their supramolecular assemblies in the presence of the tetrachlorozincate anion ([ZnCl 4 ] 2− ) structure directing agent . i Q[6] forms an outer surface interaction with [ZnCl 4 ] 2− to form different i Q[6]/[ZnCl 4 ] 2− -based supramolecular assemblies with different length 1,ω-alkyldimins. Interestingly, most 1,ω-alkyldimins were not visible in crystals structures in the presence of concentrated HCl. The porous i Q[6]/[ZnCl 4 ] 2− -based supramolecular assemblies could be used as materials for adsorbing volatile compounds .
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·Vol. 64
·期 6
·2724-2735
·
IF 3.2
Weihua Ye,Yanchao Yuan,Xing Liu,Shumei Liu,Jianqing Zhao
Polyamide 6 (PA6) is a widely used thermoplastic engineering polymer, and the toughening modification for PA6 is always a main research topic. Meanwhile, the rigidity and heat resistance of PA6 usually deteriorate. To address this conflict, an epoxy compound (EGDE-GA) was designed and synthesized and used to modify PA6 by dynamic vulcanization in twin-screw extruder. EGDE-GA is a linear molecule with a flexible molecular structure, which is favorable to toughening of PA6, and epoxy groups of EGDE-GA can form local cross-linked structure to improve the rigidity and retain the heat resistance of PA6. At the loading of 20 wt% of EGDE-GA, the modified PA6 (PA6/EGDE-GA 20) exhibited very high elongation at break and notched impact strength, which were increased by 413% and 520%, respectively, compared to those of PA6. The tensile strength was 61.4 MPa, which was higher than that of PA6. The heat deflection temperature remained almost unchanged. The results showed that the modified polymers may possess the high toughness without sacrificing the original rigidity by building the local crosslinked structure using dynamic vulcanization. The findings provide a feasible method for reusing and upcycling PA6 and other polymers with higher value and wider use in the industry. Highlights The polyamide 6 (PA6) is toughened via dynamic vulcanization. The toughness of modified PA6 is increased by 520% compared with pure PA6. The toughened PA6 exhibits higher tensile strength than that of pure PA6. The toughened PA6 maintains its rigidity and heat resistance.
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2010
·
IF 3.167
Hua Zheng,Yan Rao,Yihua Yin,Xiong Xiong,Peihu Xu,Bo Lu
A series of 6-mercaptopurine-carboxymethyl chitosans (6-MP-CMC) were prepared and structurally characterized. Their in vitro drug release behaviors in the buffer solutions containing glutathione (GSH) were investigated. 6-MP-CMC did not release any 6-MP in the media without GSH and containing 2 μM GSH. By comparison, the obvious 6-MP release could be observed within an hour in the media containing 2 mM and 10 mM GSH. And the maximum cumulative release rates were 65.1% and 74.4%, respectively. The buffer pH and the 6-MP content in 6-MP-CMC had obvious influences on the 6-MP release. At 10 mM GSH, the maximum cumulative release rate at pH 5 was higher than that at pH 7.4. 6-MP-CMC in pH 7.4 PBS could self-assemble into nanoparticles. Their mean hydrodynamic diameter determined by dynamic light scattering (DLS) was 155.8 ± 6.0 nm. The particles observed by transmission electron microscopy (TEM) were spherical in shape and had the size of about 100 nm.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 12
·6777
·
IF 4.9
Zetao Yu,Jing Wang,Wenqiang Xia,Yuemin Wang,Yafen Zhang,Jintian Tang,Haifeng Cui,Xiaoying Yang,Chenchen Bao,Zihong Ye
Inflammatory responses and tumor developments are closely related, with interleukin-6 (IL-6) playing important roles in both processes. IL-6 has been extensively identified as a potential tumor biomarker. This study developed an isotope dilution mass spectrometry (IDMS) method for quantifying IL-6 based on signature peptides. These peptides were screened by excluding those with missed cleavage or post-translational modification. The method’s accuracy was verified using amino acid-based IDMS, in which purified IL-6 protein samples were quantified after hydrolyzing them into amino acids, and no significant difference was observed (p-value < 0.05). The method demonstrated good linearity and sensitivity upon testing. The specificity and matrix effect of the method were verified, and a precision study showed that the coefficient of variation was less than 5% for both the intra-day and inter-day tests. Compared to immunoassays, this method offers distinct advantages, such as the facilitation of multi-target analysis. Furthermore, the peptides used in this study are much more convenient for storage and operation than the antibodies or purified proteins typically used in immunoassays.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Li-Jia Yao,Chun-Li Hu,Zhi Fang,Jiang-Gao Mao
Birefringent materials are very important in the laser industry. By combining the hexathiodiphosphate(IV) [P 2 S 6 ] 4- unit and the highly polarizable Hg 2+ , a mercury hexathiodiphosphate(IV) Hg 2 P 2 S 6 was designed and synthesized by using solid-state synthesis. Hg 2 P 2 S 6 crystallizes in P 1 ¯ space group. It has a layered structure as in many hexathiodiphosphates(IV) such as ZnPS 3 , CdPS 3 . Its crystal structure, electronic structure and optical properties are investigated by experimental methods and first-principle calculations. Hg 2 P 2 S 6 has a very large birefringence of 0.50 at 1064 nm and 0.48 at 2050 nm. Theoretical studies show the large birefringence comes from the synergistic effect of [P 2 S 6 ] 4- and [HgS 4 ] 6- groups with strong polarizability anisotropy.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wenwu Zhou,Yasong Zhou,Qiang Wei,Sijia Ding,Shujiao Jiang,Qing Zhang,Meifang Liu
Mesoporous Y composites which exhibit both crystallized micropores and large mesopores with narrow mesopore diameter distributions and controlled pore diameters were successfully synthesized. The composite is synthesized through an elaborate design of the SiO 2 @cationic surfactant cetyltrimethylammonium bromide (SiO 2 @CTAB) micelle swelled by an appropriate amount of 1,3,5-trimenthylbenzene (TMB); it is subsequently fabricated from the condensing of the Y zeolite precursors, which contain Y zeolite seeds, on the mesoscale micelle followed by a hydrothermal crystallization process. The effect of synthesis conditions such as the amounts of CTAB, TMB and TEOS added to the synthesis system on the physicochemical properties of the obtained products was examined. The as-synthesized materials were carefully characterized by employing XRD, N 2 adsorption–desorption, SEM, TEM and pyridine-adsorbed FTIR techniques. The mesoporous Y zeolite exhibited both the typical diffraction characteristics of Y zeolites in the wide-angle XRD pattern, and the typical diffraction characteristics of a narrowly dispersed mesopore structure in the small-angle XRD pattern is successfully synthesized for the first time. Finally, the adsorption capacity for DBT and 4,6-DMDBT by samples with different mesopore diameters were assessed by a batch method. Sample MY-0.5C-0.35T-0.9B showed the highest capacity for adsorbing DBT in model diesel, and sample MY-0.5C-0.35T-1.5B showed the highest capacity for adsorbing 4,6-DMDBT in model diesel. Most importantly, sample MY-0.5C-0.35T-1.5B showed the highest adsorptive rate for both DBT and 4,6-DMDBT, which is at least 10 times faster than that of sample MY-0C-0.35T-0B because of the elimination of the diffusion limitation.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 39
·45333
·
IF 1.86
Xi Yue,Wenjun Wu,Guodong Chen,Canrui Yang,Shijun Liao,Xiuhua Li
Quaternary ammonium functionalized poly(arylene ether) (QPAE-Br) membranes based on 2,2′,6,6′-tetramethyl biphenol for diffusion dialysis (DD) were designed and successfully fabricated via nucleophilic substitution polycondensation, bromination, film casting, and quaternization. The structures, thicknesses, ion-exchange capacities (IECs), water uptakes, swelling ratios, ion conductivities, and mechanical properties of QPAE-Br were used to characterize the membranes. The influence of the membrane structures on the DD performances was investigated by DD tests of simulated industrial pickling wastewater (1 mol/L HCl, 0.1 mol/L FeCl 2 ). The DD results show QPAE-a (IEC = 1.51 mmol/g) as the best DD candidate. Predialysis treatments further improved the DD performances of QPAE-Br. QPAE-a exhibited an excellent proton diffusion coefficient ( ) of 0.033 m/h and a high separation factor ( S ) of 95.45 after the predialysis treatment at room temperature; these values were much higher than those of the commercial DF-120B membrane (0.004 m/h for and 24.3 for S at 25 °C) and other reported DD membranes. QPAE-a has great potential for acid recovery via DD. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45333.
研究领域:
高分子科学
·
膜技术
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xiaoyue Li,Penghui Li,Yingjie Li,Haitang Liu,Zongzheng Yang,Yanyan Chen,Xiaoyuan Liao
In situ generation of H 2 O 2 by photocatalyst with sterilization is an environmentally friendly method. In this work, we prepared three kinds of Zn-based ZIFs materials, i.e., MAF-6, ZIF-11 and ZIF-71, and systematically investigated their application in the area of photocatalytic H 2 O 2 production, and antibacterial efficiency. It is found that MAF-6 had the best ability of generate H 2 O 2 (1005 μmol h -1 g -1 ), 1.6 times more than ZIF-11, while ZIF-71 produced almost no H 2 O 2 . The sterilization rate of MAF-6 against Staphylococcus aureus and Escherichia coli can reach 97% and 91% in 3 h, respectively. It is worth noting that the more photo-generated reactive oxygen species (∙OH and ∙O 2 - ) are produced, the better sterilization effect . This work provides new material and insights into photocatalytic sterilization by in situ H 2 O 2 generation.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
Chemical Biology & Drug Design
·
2015
·Vol. 86
·期 4
·753-763
·
IF 2.485
Jianpeng Feng,Bing Xiao,Wenbo Chen,Ting Ding,Lingfeng Chen,Pengtian Yu,Fengli Xu,Huajie Zhang,Zhiguo Liu,Guang Liang
We previously reported a symmetric monocarbonyl analog of curcumin (MACs), C66, which demonstrated potential anti-inflammatory activity and low toxicity. In continuation of our ongoing research, we designed and synthesized 34 asymmetric MACs based on C66 as a lead molecule. A majority of the C66 analogs effectively inhibited LPS induction of TNF- α and IL-6 expression. Additionally, a preliminary SAR was conducted. Furthermore, active compounds 4a11 and 4a16 were found to effectively reduce the W/D ratio in the lungs and the protein concentration in the bronchoalveolar lavage fluid (BALF). Meanwhile, a histopathological examination indicated that these two analogs significantly attenuate tissue injury in the lungs with LPS-induced ALI rats. 4a11 and 4a16 also inhibited mRNA expression of several inflammatory cytokines, including TNF- α , IL-6, IL-1 β , COX-2, ICAM-1 and VCAM-1, in the Beas-2B cells after LPS challenge. Altogether, the data exhibit a series of new C66 analogs as promising anti-inflammatory agents for the treatment of LPS-induced ALI.
研究领域:
药理学
·
合成化学
·
免疫学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Huang Meng,Huang Wenbin,Li Anqi,Yang Han,Jia Yijing,Yu Zhiqing,Xu Zhusong,Wang Xiaohan,Zhou Yasong,Wei Qiang
Experiments were carried out to research the different contents of Ga2O3 modification effects on the hydrodesulfurization (HDS) performance of 4,6-dimethyldibenzothiophene (4,6-DMDBT) catalyzed by the stepwise impregnation method. Characterization techniques such as XRD, BET, HRTEM, NH3-TPD, and Py-FTIR were performed to determine the effects of each modification of the catalyst by Ga on the properties of the prepared supports and catalysts. The catalytic effect of gallium is reflected in the fact that the empty d-orbitals of Ga elements participate in the formation of molecular orbitals in the active center and change their orbital properties, thus generating a direct desulfurization active phase suitable for complex sulfides for endpoint adsorption. The characterization results indicated that the introduction of Ga2O3 with appropriate content (2 wt.%) promoted Ni and Mo species to disperse uniformly and doping of more Ni atoms into the MoS2 crystals, which also increased the average stacking number and the length of MoS2. As a result, more NiMoS active phases were favored to form in the system. The specific surface area and the amounts of acid sites were increased, facilitating the adsorption of reactant molecules and the HDS reactions. The HDS results also suggested the effects of Ga modification play a very important role in the catalytic performance of the corresponding catalysts. The catalyst Ga–Ni–Mo/Al2O3 exhibited the highest conversion rate towards 4,6-DMDBT HDS when the amount of Ga2O3 loading was 2 wt.% with an LHSV of 2.5 h−1 at 290°C and Ga modification also can effectively improve the direct desulfurization (DDS) route selectivity in varying degrees.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HETEROCYCLIC CHEMISTRY
·
2015
·Vol. 54
·期 1
·784-788
·
IF 0.787
Fang-Ming Wang,Dan Bao,Bing-Xiang Hu,Ze-Yu Zhou,Deng-Deng Huang,Li-Zhuang Chen,Yuan-Yuan Dan
A series of novel 10-substituted 3,6-diphenyl-9-aryl-3,4,6,7,9,10-hexahydroacridine-1,8(2H,5H)-dione derivatives 2 were synthesized by condensation of compounds 1 with amines, which the compounds 1 were synthesized by 5-phenylcyclohexane-1,3-dione and aromatic aldehydes according to Knoevenagel, Michael, and cyclization reactions in the presence of a very small amount of l-proline as catalyzed at room temperature. The structures of all the synthesized compounds were characterized by IR, 1H NMR, and MS. In addition, the molecular structures of compound 1a have been determined by single-crystal X-ray diffraction analysis.
研究领域:
有机化学
·
药物化学
·
生物化学
✓ 已验证
DOI
高影响因子
Theranostics
·
2019
·
IF 8.063
Xiangjun Zhang,Qian Cheng,Lanlan Li,Liqing Shangguan,Chenwen Li,Shengke Li,Feihe Huang,Jianxiang Zhang,Ruibing Wang
Succinylcholine (Sch) is the only depolarizing neuromuscular blocking agent widely used for rapid sequence induction in emergency rooms. Unfortunately, a variety of (sometimes lethal) adverse effects, such as hyperkalemia and cardiac arrest, are associated with its use, and currently there are no specific antidotes to reverse Sch or to treat these side-effects. Methods: The binding behaviors of Sch and several synthetic receptors, including cucurbit[7]uril, sulfo-calix[4]arene and water-soluble carboxylatopillar[6]arene (WP[6]), were first investigated. With a mouse model, a leathal dose of Sch was selected for evaluation of the antidotal effects of these synthetic receptors on Sch induced mortality. The antidotal effects of a selected synthetic receptor, WP[6], on Sch induced cardiac arrhythmias, hyperkalemia, rhabdomyolysis and paralysis were subsequently evaluated with rat and mouse models. The reversal mechanism was also investigated at a cellular level. Results: All of these macrocyclic molecules exhibited relatively high binding affinities with Sch in vitro . In a Sch-overdosed mouse model, immediate injection of these synthetic receptors right after Sch administration increased the overall survival rate, with WP[6] standing out with the most effective antidotal effects. In addition, administration of WP[6] also reversed the paralysis induced by Sch in a mouse model. Moreover, infusion of WP[6] to Sch-overdosed rats reduced the incidence of cardiac arrhythmia, inhibited the otherwise abnormally high serum potassium levels, and relieved the muscular damage. At the cellular level, WP[6] reversed the Sch induced depolarization and reduced the efflux of intracellular potassium. Conclusion: Synthetic receptors, particularly WP[6], exhibited high binding affinities towards Sch, and presented a significant potential as supramolecular therapeutics to treat the various side effects of Sch by specifically sequestering Sch in vivo .
研究领域:
药理学
·
药物化学
·
治疗学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）