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DFT study on some polythiophenes containing benzo[d]thiazole and benzo[d]oxazole: structure and band gap. 含有苯并[d]噻唑和苯并[d]恶唑的一些聚噻吩的 DFT 研究:结构和带隙。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-09-06 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1971376
Trung Vu Quoc, Dai Do Ba, Duong Tran Thi Thuy, Linh Nguyen Ngoc, Chinh Nguyen Thuy, Huong Vu Thi, Linh Duong Khanh, Oanh Doan Thi Yen, Hoang Thai, Van Cao Long, Stefan Talu, Dung Nguyen Trong

The content of this paper focuses/shed light on the effects of X (X = S in P1 and X = O in P2) in C11H7NSX and R (R = H in P3, R = OCH3 in P4, and R = Cl in P5) in C18H9ON2S2-R on structural features and band gaps of the polythiophenes containing benzo[d]thiazole and benzo[d]oxazole by the Density Function Theory (DFT) method/calculation. The structural features including the electronic structure lattice constant (a), shape, total energy (Etot) per cell, and link length (r), are measured via band gap (Eg) prediction with the package of country density (PDOS) and total country density (DOS) of material studio software. The results obtained showed that the link angle and the link length between atoms were not changed significantly while the Etot was decreased from Etot = - 1904 eV (in P1) to Etot = - 2548 eV (in P2) when replacing O with S; and the Etot of P3 was decreased from Etot = - 3348 eV (in P3) when replacing OCH3, Cl on H of P3 corresponding to Etot = - 3575 eV (P4), - 4264 eV (P5). Similarly, when replacing O in P1 with - S to form P2, the Eg of P1 was dropped from Eg = 0.621 eV to Eg = 0.239 eV for P2. The Eg of P3, P4, and P5 is Eg = 0.006 eV, 0.064 eV, and 0.0645 eV, respectively. When a benzo[d]thiazole was added in P1 (changing into P3), the Eg was extremely strongly decreased, nearly 100 times (from Eg = 0.621 eV to Eg = 0.006 eV). The obtained results serve as a basis for future experimental work and used to fabricate smart electronic device.

本文通过密度函数理论(DFT)方法/计算,重点研究了 C11H7NSX 中的 X(P1 中的 X = S,P2 中的 X = O)和 C18H9ON2S2-R 中的 R(P3 中的 R = H,P4 中的 R = OCH3,P5 中的 R = Cl)对含有苯并[d]噻唑和苯并[d]恶唑的聚噻吩的结构特征和带隙的影响。利用材料工作室软件的国密度(PDOS)和总国密度(DOS)包,通过带隙(Eg)预测测量了包括电子结构晶格常数(a)、形状、每单元总能量(Etot)和链长(r)在内的结构特征。结果表明,原子间的链节角度和链节长度变化不大,而当用 S 取代 O 时,P1 的 Etot 从 Etot = - 1904 eV(P1)下降到 Etot = - 2548 eV(P2);当用 OCH3、Cl 取代 P3 的 H 时,P3 的 Etot 从 Etot = - 3348 eV(P3)下降到 Etot = - 3575 eV(P4)和 - 4264 eV(P5)。同样,当用 - S 取代 P1 中的 O 形成 P2 时,P1 的 Eg 从 Eg = 0.621 eV 下降到 P2 的 Eg = 0.239 eV。P3、P4 和 P5 的 Eg 分别为 Eg = 0.006 eV、0.064 eV 和 0.0645 eV。当在 P1(变为 P3)中加入苯并[d]噻唑时,Eg 下降幅度极大,接近 100 倍(从 Eg = 0.621 eV 下降到 Eg = 0.006 eV)。这些结果为今后的实验工作奠定了基础,并可用于制造智能电子器件。
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引用次数: 0
Benzocyclobutene-functionalized hyperbranched polysiloxane for low-k materials with good thermostability. 苯并环丁烯功能化超支化聚硅氧烷在低钾材料中的应用。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-09-06 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1975383
Yunfei Shi, Jing Cai, Xueliang Wu, Yuanrong Cheng

Although hyperbranched polysiloxanes have been extensively studied, they have limited practical applications because of their low glass transition temperatures. In this study, we synthesized benzocyclobutene-functionalized hyperbranched polysiloxane (HB-BCB) via the Piers-Rubinsztajn reaction. The synthesized material was cured and crosslinking occurred at temperatures greater than 200 °C, forming a low-k thermoset resin with high thermostability. The structure of the resin was characterized using nuclear magnetic resonance (NMR) spectroscopy, viz. 1H NMR and 13C NMR spectroscopy. 29Si NMR spectroscopy was used to calculate the degree of branching. Differential scanning calorimetry, dynamic mechanical analysis, and thermogravimetric analysis revealed that the cured resin possesses good high-temperature mechanical properties and exhibits a high thermal decomposition temperature (Td5 = 512 °C). In addition, the cured resin has a low dielectric constant (k = 2.70 at 1 MHz) and low dissipation factor (2.13 × 10-3 at 1 MHz). Thus, the prepared resin can function as a low-k material with excellent high-temperature performance. These findings indicate that the performance of crosslinked siloxane is significantly attributed to the introduction of BCB groups and the formation of the highly crosslinked structure.

虽然超支化聚硅氧烷已被广泛研究,但由于其玻璃化转变温度低,其实际应用受到限制。本研究通过Piers-Rubinsztajn反应合成了苯并环丁烯功能化的超支化聚硅氧烷(HB-BCB)。合成的材料在高于200℃的温度下固化并发生交联,形成具有高热稳定性的低k热固性树脂。采用核磁共振波谱(1H NMR和13C NMR)对树脂的结构进行了表征。29Si核磁共振波谱法计算了支化度。差示扫描量热法、动态力学分析和热重分析表明,固化树脂具有良好的高温力学性能,具有较高的热分解温度(Td5 = 512℃)。此外,固化树脂具有低介电常数(k = 2.70在1 MHz)和低耗散系数(2.13 × 10-3在1 MHz)。因此,所制备的树脂可以作为具有优异高温性能的低k材料使用。这些结果表明,交联硅氧烷的性能很大程度上归因于BCB基团的引入和高交联结构的形成。
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引用次数: 2
Reaction kinetics and properties of MDI base poly (urethane-isocyanurate) network polymers. MDI 基聚(氨基甲酸乙酯-异氰尿酸酯)网络聚合物的反应动力学和特性。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-08-26 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1971858
Juan Li, Shengling Jiang, Liang Ding, Lingfang Wang

Since the trimerization of isocyanate occurs easily and controllably to form a clear trifunctional isocyanate ring, this reaction is an ideal candidate for the synthesis of a clear poly(urethane-isocyanurate) network polymer. Poly(urethane-isocyanurate) network polymer (PUI) was prepared from diphenylmethane diisocyanate (MDI) and propylene glycol (PPG) by cyclotrimerization of isocyanate group (NCO). It was proved that the expected product was successfully prepared by NCO determination, fourier transform infrared (FTIR) and gel permeation chromatography (GPC) characterization. The mechanical and thermal properties were characterized. Through the effects of catalyst dosage, polyurethane prepolymer molecular weight, reaction time, reaction temperature and MDI addition on the reaction process, it is determined that under certain other conditions, the step heating method is better for cyclotrimerization reaction. Generally, the better heating conditions are 60 °C/1 h + 80 °C/4 h + 100 °C/2 h + 120 °C/2 h + 140 °C/2 h + 160 °C/2 h. The results of thermogravimetric analysis (TGA) and mechanical properties showed that with the increase of cross-linking points in the polymer structure, the thermal stability, tensile strength, tensile modulus and hardness of PUI increased, while the elongation at break decreased significantly. The glass transition temperature (Tg) of PUI is around 45 °C, and it can be seen that the elastic modulus of the material can range from 58 to 1980 MPa. X-ray diffraction results show that the rubber phase represented by the flexible segment and the plastic phase represented by the rigid structure are amorphous.

由于异氰酸酯的三聚反应容易发生且可控,从而形成透明的三官能异氰酸酯环,因此该反应是合成透明聚(尿烷-异氰尿酸酯)网络聚合物的理想候选反应。以二苯基甲烷二异氰酸酯(MDI)和丙二醇(PPG)为原料,通过异氰酸酯基团(NCO)的环三聚反应制备了聚(尿烷-异氰尿酸酯)网络聚合物(PUI)。通过 NCO 测定、傅立叶变换红外(FTIR)和凝胶渗透色谱(GPC)表征,证明成功制备了预期产品。此外,还对其机械性能和热性能进行了表征。通过催化剂用量、聚氨酯预聚物分子量、反应时间、反应温度和 MDI 添加量对反应过程的影响,确定在某些其他条件下,分步加热法更适合环三聚反应。一般来说,较好的加热条件为 60 °C/1 h + 80 °C/4 h + 100 °C/2 h + 120 °C/2 h + 140 °C/2 h + 160 °C/2 h。热重分析(TGA)和机械性能结果表明,随着聚合物结构中交联点的增加,PUI 的热稳定性、拉伸强度、拉伸模量和硬度都有所提高,而断裂伸长率则明显下降。PUI 的玻璃化转变温度(Tg)约为 45 °C,由此可见,该材料的弹性模量范围为 58 至 1980 兆帕。X 射线衍射结果表明,柔性部分所代表的橡胶相和刚性结构所代表的塑料相均为非晶态。
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引用次数: 0
Luminescent property and application values of a new Cd(II) compound in tuberculosis treatment and clinical nursing. 一种新型Cd(II)化合物的发光特性及其在结核病治疗和临床护理中的应用价值。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-08-19 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1968113
Han-Xiao Tao, Jia-Li Jiang

Through the reaction between HTrz and Cd(NO3)2 · 4H2O, a new Cd(II) compound of [Cd(Trz) 2] n (1, HTrz = 1,2,4-triazole) can be obtained, which has been studied with diffraction analysis by single crystal X-ray as well as powder X-ray diffraction. The structure of 1 can be stable up to 265°C, and the solid samples of 1 emit intense blue luminescence at room temperature. Along with the evaluation of tuberculosis treatment and clinical nursing, related mechanism was also studied here. Firstly, ELISA assay was conducted and the IL-10 and IL-18 released into the alveolar lavage fluid was determined. Apart from this, the real-time RT-PCR was used to reflect surviving gene's relative expression of Mycobacterium tuberculosis after compound treatment.

通过HTrz与Cd(NO3)2·4H2O的反应,可以得到新的Cd(II)化合物[Cd(Trz) 2] n (1,htrz = 1,2,4-三唑),并通过单晶x射线衍射和粉末x射线衍射对其进行了研究。1的结构可以稳定到265℃,1的固体样品在室温下发出强烈的蓝色发光。同时结合肺结核治疗的评价和临床护理,对相关机制进行了研究。首先采用ELISA法测定大鼠肺泡灌洗液中IL-10和IL-18的释放量。此外,采用实时RT-PCR技术反映结核分枝杆菌复合治疗后存活基因的相对表达量。
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引用次数: 0
Nanoemulsions as novel nanocarrieres for drug delivery across the skin: In-vitro, in-vivo evaluation of miconazole nanoemulsions for treatment of Candidiasis albicans. 纳米乳剂作为药物通过皮肤传递的新型纳米载体:米康唑纳米乳剂治疗白色念珠菌的体内外评价
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-08-17 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1965724
Umar Farooq, Akhtar Rasul, Muhammad Zafarullah, Ghulam Abbas, Maria Rasool, Farman Ali, Shabbir Ahmed, Zeeshan Javaid, Zoya Abid, Humayun Riaz, Rana Khalid Mahmood Arshad, Shayan Maryam, Naseem Amna, Kanwal Asif

In the current research, attempt is made to fabricate a nanoemulsion (NE) containing an antifungal agent. The prepared formulation has been expected to enhance skin penetration. It is also studied for in vitro drug release and toxicity assessment. Spontaneous titration method was used for preparation of NE. Prepared NE were characterized for their charge, size, morphology, rheological behaviour, drug release profile, skin permeability. The drug permeation and skin irritation were investigated. The in vitro antifungal activity was inspected using the well agar diffusion method. Miconazole NE showed good penetration in the skin as compared to marketed products. SEM showed semispherical shapes of the droplets. Zeta potential and zeta sizer showed that size was in nano ranges having positive charge.

在目前的研究中,试图制备一种含有抗真菌剂的纳米乳液。所制备的制剂有望增强皮肤渗透。并进行了体外释药和毒性评价研究。采用自发滴定法制备NE。对制备的NE进行了电荷、大小、形态、流变行为、药物释放谱、皮肤渗透性等表征。观察药物的透性和皮肤刺激性。采用琼脂扩散孔法检测其体外抑菌活性。与市面上销售的产品相比,咪康唑NE在皮肤中的渗透性较好。扫描电镜显示液滴呈半球形。Zeta电位和Zeta浆料表明,浆料在纳米级范围内具有正电荷。
{"title":"Nanoemulsions as novel nanocarrieres for drug delivery across the skin: In-vitro, in-vivo evaluation of miconazole nanoemulsions for treatment of <i>Candidiasis albicans</i>.","authors":"Umar Farooq,&nbsp;Akhtar Rasul,&nbsp;Muhammad Zafarullah,&nbsp;Ghulam Abbas,&nbsp;Maria Rasool,&nbsp;Farman Ali,&nbsp;Shabbir Ahmed,&nbsp;Zeeshan Javaid,&nbsp;Zoya Abid,&nbsp;Humayun Riaz,&nbsp;Rana Khalid Mahmood Arshad,&nbsp;Shayan Maryam,&nbsp;Naseem Amna,&nbsp;Kanwal Asif","doi":"10.1080/15685551.2021.1965724","DOIUrl":"https://doi.org/10.1080/15685551.2021.1965724","url":null,"abstract":"<p><p>In the current research, attempt is made to fabricate a nanoemulsion (NE) containing an antifungal agent. The prepared formulation has been expected to enhance skin penetration. It is also studied for in vitro drug release and toxicity assessment. Spontaneous titration method was used for preparation of NE. Prepared NE were characterized for their charge, size, morphology, rheological behaviour, drug release profile, skin permeability. The drug permeation and skin irritation were investigated. The in vitro antifungal activity was inspected using the well agar diffusion method. Miconazole NE showed good penetration in the skin as compared to marketed products. SEM showed semispherical shapes of the droplets. Zeta potential and zeta sizer showed that size was in nano ranges having positive charge.</p>","PeriodicalId":11170,"journal":{"name":"Designed Monomers and Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2021-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8382019/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39343795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Theoretical studies of optoelectronic and photovoltaic properties of D-A polymer monomers by Density Functional Theory (DFT). 用密度泛函理论(DFT)研究D-A聚合物单体光电和光伏性能。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-07-27 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1956209
Numbury Surendra Babu, Said A H Vuai

In this research article, the new donor-acceptor (D-A) monomers developed using 4-methoxy-9-methyl-9 H-carbazole (MMCB) as electron donors and various electron acceptors. DFT and TD-DFT methods at the level of B3LYP with a 6-311 G basis set in a gas and chloroform solvent were used to calculate electronic and optoelectronic properties. To dissect the relationship between the molecular and optoelectronic structures, the impacts of specific acceptors on the geometry of molecules and optoelectronic properties of these D-A monomers were discussed. The calculations are also carried out on HOMO-LUMO, atomic orbital densities. The calculated band gap E g of the monomers considered increases 3,6-MMCB-OCP ≈ 3,6-MMCB-BCO < 3,6-MMCB-SDP < 3,6-MMCB-SCP < 3,6-MMCB-TCP < 3,6-MMCB-TDP < 3,6-MMCB-BCS < 3,6-MMCB-BCT in both in the gas and solvent phases. Subsequently, the optoelectrical properties of E HOMO , E LUMO , E opt , and E B energies were critically updated. Compared to different monomers, the far lower E g of the 3,6-MMCB-OCP and 3,6-CB-BCO has shown optoelectronic applications in organic solar cells like BHJ.

本文以4-甲氧基-9-甲基-9 h -咔唑(MMCB)为电子给体和各种电子受体,开发了新的给受体(D-A)单体。采用DFT和TD-DFT方法计算了B3LYP在气体和氯仿溶剂中6-311 G基下的电子和光电子性质。为了剖析分子与光电结构之间的关系,讨论了特定受体对分子几何形状和这些D-A单体光电性能的影响。对HOMO-LUMO原子轨道密度也进行了计算。所考虑的单体在气相和溶剂相的带隙E均增大3,6- mmcb - ocp≈3,6- mmcb - bco < 3,6- mmcb - sdp < 3,6- mmcb - scp < 3,6- mmcb - tcp < 3,6- mmcb - tdp < 3,6- mmcb - bcs < 3,6- mmcb - bct。随后,对E HOMO、E LUMO、E opt和E B能量的光电性质进行了关键性的更新。与其他单体相比,3,6- mmcb - ocp和3,6- cb - bco的eg值低得多,已在BHJ等有机太阳能电池中显示出光电应用。
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引用次数: 2
A luminescent Zn-MOF exhibiting high water stability: selective detection of Cr(VI) ion and treatment activity on sepsis. 具有高水稳定性的发光Zn-MOF:对Cr(VI)离子的选择性检测和对败血症的治疗活性。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-07-27 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1953239
Ying Wan, Xu-Mei Chen, Qian Zhang, Hong-Biao Jiang, Ran Feng
ABSTRACT A fresh metal-organic framework (MOF) based on the Zn ions as the metal ions has been prepared via the solvothermal method, and its chemical formula is [Zn(byia)(DMF)]·1.5DMF·7H2O (1, byia =  5-(benzimidazol-2-yl) isophthalic acid). It is worth noting that the compound 1 has excellent water stability (which can be maintained in the water for at least a month). Most fascinating, in water, the compound 1 exhibits the strong blue luminescence, which can only be selectively quenched via the contaminant of the Cr2O7 2– ion. The selective luminescence quenching with low limits of detection and high values of K sv proved its better sensing property, which can be compared with the contemporary materials. To development new strategy for the sepsis treatment, the biological activity and mechanism of the compound was explored. Firstly, the ELIA detection was performed in this experiment to assess the inhibition of compound against inflammatory factor storm during sepsis. Then, the inflammatory response in the immune cells was assessed by real time RT-PCR.
采用溶剂热法制备了以Zn离子为金属离子的新型金属有机骨架(MOF),其化学式为[Zn(byia)(DMF)]·1.5DMF·7H2O (1, byia = 5-(苯并咪唑-2-基)间苯二甲酸)。值得注意的是,化合物1具有优异的水稳定性(可在水中保持至少一个月)。最令人着迷的是,在水中,化合物1表现出强烈的蓝色发光,这种发光只能通过Cr2O7 -离子的污染选择性猝灭。低检测限和高ksv值的选择性发光猝灭证明了其较好的传感性能,可与当代材料相媲美。为了开发新的脓毒症治疗策略,对该化合物的生物活性及其作用机制进行了探讨。首先,本实验通过ELIA检测来评估化合物对脓毒症时炎性因子风暴的抑制作用。然后,通过实时RT-PCR评估免疫细胞的炎症反应。
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引用次数: 4
Preparation and properties of rigid polyurethane foams added with graphene oxide-hollow glass microspheres hybrid. 氧化石墨烯-中空玻璃微球杂化硬质聚氨酯泡沫的制备及性能研究。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-07-14 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1954340
Dong Liu, Longqing Zou, Qianqian Chang, Tianyuan Xiao

Rigid polyurethane foam (RPUF) as a filling material that can enhance the crashworthiness of thin-walled tubes. GO-HGMS hybrid was prepared by solution blending of graphene oxide (GO) and hollow glass microspheres (HGMS). The effect of the composite on the compression properties of RPUF was investigated. The GO-HGMS hybrid was characterized by fourier transform infrared spectroscopy (FTIR), x-ray diffraction(XRD), and scanning electron microscopy (SEM). The compression test and microstructure results show that the best compression performance and the largest apparent density of the composite foam were obtained when the hybrid content was 4 wt %. In addition, the compression test results of empty tubes (ET) and foam-filled tubes (FFT) under lateral load indicate that the combination of lightweight foamed material and thin-walled tube improves the stability of thin-walled tube deformation and the ability of the structure to resist deformation. GO-HGMS/RPUF as the filling material of thin-walled tube structure greatly improves the bearing capacity and energy absorption level of ET.

硬质聚氨酯泡沫塑料(RPUF)作为填充材料,可以提高薄壁管的耐撞性。将氧化石墨烯(GO)与中空玻璃微球(HGMS)溶液共混制备了GO-HGMS杂化体。研究了复合材料对RPUF压缩性能的影响。采用傅里叶变换红外光谱(FTIR)、x射线衍射(XRD)和扫描电镜(SEM)对GO-HGMS杂化物进行了表征。压缩试验和微观组织结果表明,当杂化量为4 wt %时,复合泡沫材料的压缩性能最佳,表观密度最大。此外,空管(ET)和泡沫填充管(FFT)在侧载作用下的压缩试验结果表明,轻质泡沫材料与薄壁管的组合提高了薄壁管变形的稳定性和结构的抗变形能力。GO-HGMS/RPUF作为薄壁管结构的填充材料,大大提高了ET的承载能力和吸能水平。
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引用次数: 3
Preparation parameters of polyaniline/polyvinyl chloride flexible wires for electrical conductivity performance analysis based on orthogonal arrays. 基于正交阵列的聚苯胺/聚氯乙烯软线制备参数及其导电性能分析
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-06-28 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1936373
Wu Xuelian, Jiang Jiang, Yang Jian, Feng Qin, Wang Zhifeng

A flexible polyaniline/polyvinyl chloride (PVC) polymer conductive wire was prepared using flexible PVC polymer as the substrate by the swelling - in-situ polymerization method, the line-shaped dents were pressed on the substrate by the thermodynamic pre-deformation treatment technology. Based on the orthogonal test method, the effects of five main influencing factors - swelling time (A), swelling temperature (B), oxidation temperature (C), oxidation time (D), and oxidant concentration (E) - on the conductivity of the prepared polyaniline/PVC conductive wire was investigated. The results of the orthogonal array testing were subjected to range analysis and analysis of variance (ANOVA), and the influencing factors, in terms of significance, follow the order of swelling temperature, oxidation time, swelling time, oxidation temperature, and oxidant concentration, with the optimal factor-level combination being A2B2C2D2E2, which led to a desirable conductivity up to 1.19 × 10-1 S/cm. In addition, the influence of different conductive line size characteristics on the molecular structure, microstructure, and conductivity of polyaniline/PVC flexible conductive wire was further studied. On the microstructure, as the line width increases, the infrared absorption intensity ratio of the quinone ring and the benzene ring in the polyaniline/PVC conductive wires gradually approaches 1. The microstructure, as the line width of the polyaniline/PVC conductive wire increases, the formed polyaniline gradually changes from flakes and granules to fibrous strips and entangles with each other to form a spatial network structure. The conductivity of the wire increases with the increase of its width up to 1.48 × 10-1 S/cm.

以柔性聚氯乙烯(PVC)聚合物为基材,采用原位膨胀聚合法制备了柔性聚苯胺/聚氯乙烯(PVC)聚合物导电丝,并采用热力学预变形处理技术在基材上压出线状凹痕。采用正交试验法,考察了溶胀时间(A)、溶胀温度(B)、氧化温度(C)、氧化时间(D)和氧化剂浓度(E) 5个主要影响因素对所制聚苯胺/PVC导电丝导电性能的影响。正交试验结果进行极差分析和方差分析(ANOVA),影响因素显著性依次为溶胀温度、氧化时间、溶胀时间、氧化温度、氧化剂浓度,最佳因子水平组合为A2B2C2D2E2,电导率可达1.19 × 10-1 S/cm。此外,还进一步研究了不同导线尺寸特性对聚苯胺/聚氯乙烯软导线分子结构、微观结构和电导率的影响。在微观结构上,随着线宽的增大,聚苯胺/聚氯乙烯导线中醌环和苯环的红外吸收强度比逐渐趋近于1。微观结构上,随着聚苯胺/PVC导电丝线宽的增大,形成的聚苯胺逐渐由片状、颗粒变为纤维条,并相互缠绕,形成空间网状结构。导线的电导率随导线宽度的增加而增加,最高可达1.48 × 10-1 S/cm。
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引用次数: 0
Two Co(II) coordination polymers: magnetic properties and application values against chronic subdural hematoma. 两种Co(II)配位聚合物:磁性和对慢性硬膜下血肿的应用价值。
IF 1.6 4区 化学 Q2 Chemical Engineering Pub Date : 2021-06-28 eCollection Date: 2021-01-01 DOI: 10.1080/15685551.2021.1935535
Jing-Sen Chen, Sheng-Long Cao, Hai-Ying Hu, Juan Shen, Yu-Jun Qi

In this current experiment, by applying the mixed-ligand synthesis method, two coordination polymers (CPs) containing Co(II) were created triumphantly with reaction between 1,3-bis(1-imidazoly)benzene (mbib) and Co(II) salts with the aid of diverse carboxylic ligands, and their chemical formulae are [Co3(opda)3(mbib)4(H2O)4]·2H2O (1, H2opda is 1,2-phenylenediacetic acid) and [Co(mpda)(mbib)]·H2O (2, H2mpda is 1,3-phenylenediacetic acid). The two compounds' magnetic performances suggest that between the adjacent metal ions, there present the antiferromagnetic coupling. The evaluation of their treatment activity against chronic subdural hematoma was carried out and the relevant mechanism was studied simultaneously. Firstly, before the treatment of compound, the chronic subdural hematoma was generated. Furthermore, the enzyme-linked immunosorbent assay detection kit was implemented and in hematoma capsule, the anti-inflammatory cytokines level and pro-inflammatory cytokines level was detected. Additionally, the cytotoxicity of compounds 1 and 2 on the normal human cells was determined with Cell Counting Kit-8 assay. Above all, we proved compound 1 decreased the pro-inflammatory cytokines content and increased the anti-inflammatory cytokines content in the hematoma capsule, which is much stronger than that of compound 2. Both compounds 1 and 2 showed no cytotoxicity on the normal human cells.

本实验采用混合配体合成方法,在不同羧基配体的辅助下,通过1,3-双(1-咪唑)苯(mbib)和Co(II)盐的反应,成功合成了两种含Co(II)的配位聚合物(CPs),其化学式为[Co3(opda)3(mbib)4(H2O)4]·2H2O (1, H2opda为1,2-苯二乙酸)和[Co(mpda)(mbib)]·H2O (2, H2mpda为1,3-苯二乙酸)。两种化合物的磁性能表明相邻金属离子之间存在反铁磁耦合。对其治疗慢性硬膜下血肿的疗效进行评价,并对其作用机制进行研究。首先,在复方治疗前,已产生慢性硬膜下血肿。采用酶联免疫吸附法检测血肿胶囊中抗炎细胞因子和促炎细胞因子水平。此外,用细胞计数试剂盒-8测定化合物1和2对正常人细胞的细胞毒性。综上所述,我们证明化合物1降低了血肿胶囊中促炎细胞因子的含量,增加了抗炎细胞因子的含量,其作用强于化合物2。化合物1和2对人体正常细胞均无细胞毒性。
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Designed Monomers and Polymers
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