JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
·
IF 2.694
Yangyi Huang,Yuning Zhang,Haoran Liu,Weiping Luo
In this study, the solubilities of isophthalic acid (IPA) in N-methylformamide (NMFM), N-methylformanilide (NMFL), propanoic acid (PA), sulfolane, and dimethyl sulfoxide (DMSO) and m-toluic acid (m-TA) in acetone, cyclohexanone (CYC), 1-methyl-2-pyrrolidinone, NMFM, NMFL, N,N-dimethylformamide, PA, sulfolane, and DMSO were determined by the dynamic laser method at atmospheric pressure (101.2 kPa), and the solubility ratios between IPA and m-TA in different solvents were calculated. The temperature range of the experiment was between 290.15 and 348.15 K, in which the solubilities of IPA and m-TA in selected solvents were positively correlated with temperature. The maximum ratio between the mole fraction of solubilities of m-TA and IPA was in CYC and ranged from 68 to 84 for the temperature range under study. The experimental data were correlated by the Apelblat model, the Buchowski–Ksiazczak λh model, and the modified nonrandom two-liquid (NRTL) activity coefficient model.
研究领域:
化学
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物理化学
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DOI
高影响因子
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
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2017
·Vol. 53
·期 3
·459-461
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IF 0.603
Liu X. J.,Yan Y. N.,Wang S. Q.,Li X.,Liu X. G.
A new synthetic route to 4-methoxyisophthalic acid, the key intermediate in the synthesis of Picotamide, is reported. The new protocol starts from commercially available and cheap 4-methylphenol and includes four steps: esterification, Fries rearrangement, methylation, and oxidation; the overall yield is 49%. Unlike the traditional Blanc chloromethylation/oxidation scheme, the proposed procedure avoids using volatile and corrosive hydrochloric acid.
研究领域:
有机化学
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药物化学
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2025
·
IF 3.4
Zhonghua Li,Songgu Wu,Junbo Gong
The influence of halogen-atom substitution for a dimethyl isophthalate compound on the polymorphic behavior and isostructurality property was explored in this paper. Sublimation was demonstrated to exhibit remarkable advantages. Specifically, two polymorphs (Form I and Form II) of dimethyl 5-bromoisophthalate and two polymorphs (Form A and Form B) of dimethyl 5-iodoisophthalate were discovered for the first time. Moreover, the corresponding single crystals suitable for crystal structure determination were also successfully harvested within a few hours. More interestingly, the crystal packing similarities between the stable Form II and metastable Form A were established with the evaluation of quantitative analysis tools. The success in achieving the regulation of luminescence emission with the changes of crystal packing patterns, molecular conformations, and interactions via halogen substitution will provide some inspiration for the development of novel flexible optical solid-state systems in the future.
研究领域:
材料科学
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晶体学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yuan Liu,Jun Zhao,Yunyan Peng,Jun Luo,Lijun Cao,Xiaoqing Liu
Epoxy derived from heteroaromatic compounds and its properties are seldom reported. In this work, two model epoxy monomers (EP-B and EP-F) were synthesized from isophthalic acid and 2,5-furandicarboxylic acid. After curing with 4,4-diaminodiphenylmethane (DDM) in a stoichiometric quantity of 2:1, their properties were comparatively investigated, especially the formation and role of hydrogen bonding in them were identified. Results obtained from differential scanning calorimetry (DSC), dynamic thermomechanical analysis (DMA), fluorescence emission spectra, and static contact angle measurements showed that the cured EP-F/DDM system exhibited unexpected performance in higher glass transition temperature (Tg), fluorescence intensity, and hydrophilicity. And temperature-dependent Fourier transform infrared (FT-IR) analysis further confirmed that it was the more hydrogen bonding in the cured EP-F/DDM, involved with the oxygen heteroatoms in the furan ring, which led to its better properties. This work gives us some new insights into the role of electronegative heteroatoms in epoxy resin synthesized from heteroaromatic compounds.
研究领域:
材料科学
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化学
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DOI
高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
·
2019
·Vol. 74
·期 3
·261-265
·
IF 0.961
Gao-Feng Wang,Shu-Wen Sun,Wei-Bing Wang,Hong Sun,Shao-Fei Song
Two coordination polymers, {[Co(bipmo)(tbip)]·3H 2 O} n ( 1 ) and {[Cd(bipmo)(tbip)]·3H 2 O} n ( 2 ) (bipmo=bis(4-(1 H -imidazol-1-yl)phenyl)methanone, H 2 tbip=5- tert -butylisophthalic acid), were synthesized by solvothermal methods and structurally characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. The results from single-crystal X-ray diffraction data indicate that the solid state structures of 1 and 2 consist of metal-aromatic carboxylate layers, which are pillared by weak interactions to generate a three-dimensional network. The topological structures of 1 and 2 are uninodal nets based on 3-connected nodes with the Schläfli symbol of {6 3 }.
研究领域:
无机化学
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材料科学
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DOI
高影响因子
POLYHEDRON
·
2018
·
IF 2.067
Ya-Nan Ren,Wei Xu,Zhen-Xiu Si,Lin-Xia Zhou,Yue-Qing Zheng
Two new uranyl compounds [NH 4 ][(UO 2 )(ipa) 1.5 ]·H 2 O 1 and [(UO 2 ) 2 ( μ 2 OH)( μ 3 OH)(ipa)(H 2 O)]·H 2 O 2 (H 2 ipa = isophthalic acid) have been synthesized under hydrothermal conditions and characterized by infrared spectra (IR), thermogravimetric analysis (TGA), elemental analyses and X-ray diffraction (XRD). Structural analysis reveals compound 1 exhibits two-dimensional (2D) framework through the bridging of ipa 2− anions, which was further construct to three-dimensional (3D) structure via π–π stacking interaction. Compound 2 presents a tetranuclear building block [(UO 2 ) 4 ( μ 2 OH) 2 ( μ 3 OH) 2 (H 2 O) 2 ] unit which was linked via μ 3 η 4 coordination mode ipa 2− anions to form one-dimensional (1D) chains structure. The fluorescence properties of the two compounds were investigated. The photocatalytic performance of compound 2 was also investigated and the results show that compound 2 exhibits good photocatalytic activity toward the degradation of tetracycline antibiotics under LEDs irradiation.
研究领域:
化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Chaoyi Guo,Jie Jiang,Zhihua Zhu,Jinjin Li,Ling Zhao,Zhenhao Xi
Semi-aromatic nylon MXD6 shows superior mechanical strength and gas barrier properties. To improve its toughness and get sight into its excellent properties, a series of poly( m -xylylene adipamide-co-isophthalamide) (MXD6/I) random copolyamides were synthesized using adipic acid, isophthalic acid (IPA) and m -xylylene diamine as monomers via direct melt polycondensation. The effect of IPA content on the thermal, crystallization, heat resistant, mechanical, and barrier properties of the copolyamides were systematically investigated. The results showed that the increase of IPA content from 0 to 12 mol% resulted in a decrease in the melting point of the copolyamides from 238 to 217°C but the glass transition temperature ( T g ) increased from 88 to 105°C. Correspondingly, the Vicat softening temperature decreased from 199.2 to 172.5°C. The crystallization rate of the copolyamides significantly decreased with the increase of the IPA content. The copolyamides had improved elongation and rupture energy and decent oxygen barrier properties with the introduction of IPA. It is expected that this study would guide design of MXD6 macromolecular chain structure to prepare high-performance MXD6 materials.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
Inorganic and Nano-Metal Chemistry
·
2017
·
IF 0
Jiaxing Li,Meng Ni,Chaoyi Fan,Yan Li,Xiuqing Zhang
A new cobalt complex [Co3(SIP)2(4-PP)8(H2O)6]·4H2O·2(4-PP) (1) with 5-sulfoisophthalic acid sodium (NaH2SIP) and 4-phenyl pyridine (4-PP) as ligands has been synthesized in the mixed solvents of ethanol and water. It crystallized in monoclinic, space group P21/c, with a = 20.9642(9) Å, b = 15.6091(5) Å, c = 20.0126(8) Å, α = 90.00°, β = 115.493(6)°, γ = 90.00°, V = 5911.2(4) Å3, Z = 2, Dc = 1.346 g/cm−3, F(000) = 2494, the final GOOF = 1.038, Rint = 0.0258 and wR2 = 0.1793. The complex (1) was characterized by single-crystal X-ray diffraction, magnetic susceptibility and IR spectroscopy analyses. Single-crystal X-ray diffraction shows that complex (1) is trinuclear based on cobalt units. Magnetic susceptibility measurement indicates that complex (1) shows an antiferromagnetic coupling between the Co(II) ions.
研究领域:
无机化学
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材料科学
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DOI
Journal of Energy Chemistry
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2020
·
IF 7.216
Hui Liu,Daichong Peng,Tianye Xu,Kedi Cai,Kening Sun,Zhenhua Wang
Lithium (Li) metal, possessing ultrahigh theoretical capacity and the lowest electrode potential, is regarded as a promising new generation anode material. However, the uncontrollable growth of Li dendrites during cycling process gives rise to problems as capacity decay and short circuit, suppressing the cycling and safety performances of Li metal battery. In this contribution, porous conductive interlayer (PCI), composed of carbon nanofibers (CNFs) and polyisophthaloyl metaphenylene diamine (PMIA), is developed to suppress Li dendrites and stabilize Li metal anode. PCI possesses the excellent conductive ability of CNFs and the preeminent mechanical properties of PMIA at the same time. When Li metal contacts with PCI during cycling process, an equipotential surface forms on their interface, which eliminates the tip effect on Li anode and homogenizes Li-ions flux in combination with the uniform porous structure of PCI. Employed PCI, the Li|Cu cell exhibits a remarkable cycling stability with a high average Coulombic efficiency of 97.5% for 100 cycles at 0.5 mA cm −2 . And the Li|LiFePO 4 cell exhibits improved rate capability (114.7 mAh g −1 at 5.0 C) and enhanced cycling performance (78.9% capacity retention rate over 500 cycles at 1.0 C). This work provides a fresh and effective solving strategy for the problem of dendrites in Li metal battery.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2021
·
IF 1.751
Hanyuan Zhang,Xiaomeng Li,Qin Wang,Jiaxin Zhong,Liang Zhao,Xinlong Wang,Chao Qin
Two new coordination polymers constructed from 5-sulfoisophthalic acid sodium salt (NaH2SIPA) and Co or Cu cations, [Co3(SIPA)2(4,4′-bpy)4(H2O)6]·4H2O (1) and [Cu6O3(HSIPA)3(4,4′-bpy)6(H2O)3]·7H2O (2), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction (SXRD), powder X-ray diffraction (PXRD), IR spectroscopy, thermogravimetric analysis, UV-Vis spectroscopy, and elemental analysis. Compound 1 represents a twofold-interpenetrating 3-D framework based on Co, SIPA, and 4,4′-bipyridine ligands with a qzd topology. Different from 1, compound 2 shows a 3-D self-penetrating framework based on Cu, HSIPA, and 4,4′-bipyridine ligands. Furthermore, the photocatalytic performance in reduction of CO2 of 1 under visible light was investigated.
研究领域:
无机化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2021
·
IF 0.782
Fangmin Chen,Chichi Zhou,Yan Li,Xiuqing Zhang
Three coordination polymers—{[Ag2(SIP)(4-pp)]·[Ag(4-pp)2]·H2O}n, [Pb4(SIP)2(μ3-OH)2(H2O)2]n, and {[Zn2(SIP)2(4-pp)4][Zn(4-pp)2(H2O)4]·4H2O}n (SIP = 5-sulfoisophthalic acid anion, 4-pp = 4-phenylpyridine)—are constructed under hydrothermal or solvothermal conditions using sodium m-phthalate 5-sulfonate (NaH2SIP) and 4-phenylpyridine as ligands. The structures of the three complexes are determined by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analyses, Fourier-transform infrared analysis, and photoluminescence. The fluorescent properties of the complexes in the solid state are investigated at room temperature, and the results indicate that they all show photoluminescent properties.
研究领域:
无机化学
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材料科学
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晶体学
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DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 8
·期 16
·4010-4017
·
IF 5.365
Nazir Ahmad,Hussein A. Younus,Adeel H. Chughtai,Kristof Van Hecke,Zafar A. K. Khattak,Zhang Gaoke,Muhammad Danish,Francis Verpoort
Synthesis of 2D MOFs is often sensitive to the reaction conditions like temperature and solvent etc. Cu(II)-5-azidoisophthalate MOF (Cu(II)–5N3IP) has been synthesized at room temperature as well as under solvothermal conditions. The azide functional group remained stable during solvothermal synthesis at 85 °C. Cu(II)–5N3IP crystallized in a Kagomé-type structure. Typical Cu2 paddle-wheels are connected to each other by 5N3IP ligands in infinite 2D sheets in the (001) plane, featuring 1D infinite channels within each layer. This MOF is used for the adsorption of methylene blue (MB), rhodamine B (RhB), methyl orange (MO), and Congo red (CR). The adsorption is selective to the dimensions, shapes and ionic strengths of the dyes. Cu(II)–5N3IP exhibited adsorption rates in the order MB > CR > RhB > MO. Cu(II)–5N3IP is used as a catalyst for aerobic oxidation and Knoevenagel condensation. 3–10 mol% of Cu–5N3IP selectively catalyzes the oxidation of benzyl alcohol to benzaldehyde in 9–20 h at 60 °C. In Knoevenagel condensation, the reaction of both unsubstituted and substituted benzaldehydes at room temperature was observed at a very low catalyst loading of 3 mol% of MOF within a short time of 3–60 min. This 2D MOF has proved to be more efficient for dye adsorption and the catalytic applications under investigation (such as alcohol oxidation and Knoevenagel condensation) than its analogous 3D or 0D materials.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
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