EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Xikun Zhang,Xue Lv,Ting Xie,Yanwen Cheng,Jiajia Zhang,Xiaoyan Xu
In catalytic reactions, achieving large specific surface area immobilisation of the catalyst is an important factor affecting the catalytic effect, however, the primary challenges in utilizing hydrogels as catalyst carriers are to enhance the mechanical properties of the hydrogel to improve the activity and controllability of the catalyst. In this study, a new structure of P(AM-co-AA)/SMA/NH 2 -SiO 2 hydrogels was synthesized via free radical polymerization, and the effects of the content of AA and NH 2 -SiO 2 on the mechanical properties of the hydrogels were investigated. Without the use of additional cross-linking agents, both a chemical cross-linking network and a hydrophobic linkage network were established, which effectively reconstructed the structure of the hydrogels and dissipated energy. As a result, P(AM-co-AA-1.5 %)/SMA/NH 2 -SiO 2 -0.5 % hydrogel exhibited high mechanical properties, with tensile strength, elongation, and toughness reaching 1456 KPa, 4605 %, and 23.59 MJ/m 3 , respectively. This hydrogel can be utilized as a template for in situ and stable Ag NPs. Additionally, P(AM-co-AA)/SMA/NH 2 -SiO 2 @Ag composite hydrogels were prepared using cation exchange and in situ reduction methods for the catalytic reduction of 4-nitrophenol (4-NP). The composite hydrogel exhibited fast catalysis, high efficiency, stable cycling, recyclability and adjustable catalytic activity at 35 °C with K app = 0.811 min −1 . Furthermore, using this composite hydrogel alleviated the need for separating metal nanoparticle catalysts from the reaction system, thereby enabling the development of robust hydrogel materials with controlled catalytic activity for the wastewater treatment industry.
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Small
·
2023
·Vol. 20
·期 3
·2306459
·
IF 13.3
Shuoxing Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Nonlinear optical (NLO) crystals are indispensable for the solid-state lasers for their ability to expand wavelength spectral to the regions where the directing lasing is difficult or even impossible, yet the rational design of a high-performance NLO crystal remains a great challenge owing to the severe structural and properties’ requirements. Herein, a new noncentrosymmetric (NCS) and polar gallium iodate, LiGa(IO 3 ) 4 , with a novel 2D anionic layer, is successfully designed and synthesized by the aliovalent substitution strategy based on classic α-LiIO 3 . The 2D [Ga(IO 3 ) 4 ] ∞ − layer in LiGa(IO 3 ) 4 is built from the GaO 6 octahedra and highly polarizable units IO 3 . Compared with its parent compound, the partial replacement of A-site Li + cation with main group Ga 3+ cation facilitates LiGa(IO 3 ) 4 to possess excellent NLO properties, including the large second-harmonic generation (SHG) response (14 × KH 2 PO 4 (KDP) @ 1064 nm), wide bandgap (4.25 eV), large birefringence (0.23 @ 1064 nm), and wide optical transparency from UV to mid-IR. These reveal that LiGa(IO 3 ) 4 will be a promising NLO crystal.
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CHEMOSPHERE
·
2019
·
IF 5.108
Yating Jia,Fan Hu,Yuancai Lv,Yuancai Chen,Yongyou Hu
Polybrominated diphenyl ethers (PBDEs) are widely used as flame retardants and challenges for water treatment due to their persistence and toxicity. In this study, the reduction of 2′2′4′4′-tetrabromodiphenyl ether (BDE-47) was investigated in a nano-bio-integrated system. Results showed that the introducing of P. putida could markedly accelerate the demineralization of BDE-47 in nZVI/Pd- P.p system; the continuous generation of acidic metaboliates by P. putida could decrease pH, which could alleviate the surface passivation to some extent, resulting in the releasing of Fe 2+ and high generation of H 2 O 2 , the shift in reactive oxygen species from Fe(IV) to •OH. The BDE-47 was firstly debrominated to the DE by the highly reductive [Pd·2H] generated by nZVI/Pd, then oxidized to bromophenol and phenol, catechol as well as hydroquinone via the P. putida strain and the Fenton-like system. The toxicity assays confirmed the combined system could avert generation of nocuous intermediates, and could be an alternative strategy for complete remediation of recalcitrant POPs.
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Polymers
·
2019
·Vol. 11
·期 7
·1152
·
IF 3.164
Huiqin Zhang,Pan Liu,Zheng Chi,Xuegang Chen
Hydrophilic copolymers containing 2,2′:6′,2″-terpyridine moieties and acrylic acid (AA) units poly (acrylic acid-co-4-(2,2′:6′,2″-terpyridin-4′-yl)styrene) (P(AA-co-TPY)) were synthesized and characterized. Coordinated with different transition metal ions, the dilute aqueous solution of the copolymers exhibited red-shifted UV-vis absorption peaks of π-π* transition from 317 to 340 nm. Further, interacting with iron ions, the copolymer showed new absorption peaks at a longer wavelength region (570 nm) and the absorption intensity enhanced with increase of the ion concentration. When enough ions were added to coordinate with the 2,2′:6′,2″-terpyridine moieties, novel metallo-supramolecular hydrogels were obtained due to the formation of metal coordination bonds between polymer back bones and transition metal ions (Ni2+, Zn2+, Cd2+, Fe2+and Cu2+), which acted as self-assembly crosslinking structures. The mechanical strength and morphology of the resulting metallo-supramolecular hydrogels have been investigated.Keywords:terpyridine;hydrophilic polymer;metallo-supramolecular;hydrogels
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NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 34
·13654-13661
·
IF 3.069
Chun-rong Zhu,Jia-ping Xie,Hong-rong Mou,Zhen-jie Huang,Qian Tang,Cheng-bin Gong,Xiang-kai Fu
Nine 4,4′,4′′,4′′′-(cyclobutane-1,2,3,4-tetrayl)tetrabenzoate derivative electrochromic materials have been designed, synthesized, and characterized. Seven compounds displayed dual-colored electrochromism. The required potential and colored states were markedly influenced by substitution. When the substituent was alkyl, colored states of purple and blue were obtained at an applied voltage of −2.3 and −2.6 V, respectively; when the substituent was phenyl with an electron-donating group, colored states of purple bluish and bright blue were obtained at an applied voltage of −2.1 and −2.3 V, respectively; when the substituent was phenyl with an electron-withdrawing group, monocolored state and bad electrochromic properties were obtained. Moreover, electrochromic devices based on most of these compounds show large optical contrast, fast response time, and high coloration efficiency.
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POLYMER INTERNATIONAL
·
2013
·Vol. 62
·期 9
·1358-1367
·
IF 2.125
Gang Zhang,Dong-ting Bai,Dong-sheng Li,Sheng-ru Long,Xiao-jun Wang,Jie Yang
Two kinds of monomers containing thioether units 4,6-bis(4-chloroformylphenylthio)pyrimidine (BPPM-DC) and 3,6-bis(4-chloroformylphenylthio)pyridazine (BPPD-DC) were synthesized by two steps and were reacted with diamine-containing thioether (−S–) and sulfone units to prepare a kind of polyamide containing heterocycles and high contents of thioether groups. These polyamides had good optical properties, including an optical transmittance of the aromatic polyamide film at 450 nm that was higher than 87%. Additionally, the pyridazine, pyrimidine and the large quantity of thioether units provided the polymers with high refractive indices of 1.722–1.732 and low birefringences of 0.004–0.006. These polyamides were also found to have good thermal properties. They showed improved solubility in polar aprotic solvents and could form tough films with a tensile strength of 79.2–112.3 MPa and a storage modulus of 1.4–2.4 GPa (at 200 °C).© 2013 Society of Chemical Industry
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2016
·Vol. 408
·期 9
·2319-2327
·
IF 3.125
Chen Yanrong,Wang Kan,Liu Zongrui,Sun Rongjin,Cui Daxiang,He Jinghua
Rapid and quantitative detection of biomarkers with high sensitivity and specificity has become a common practice in the clinical diagnosis and treatment of cancer. Herein, a quantitative lateral flow immunoassay (LFIA) based on superparamagnetic nanoparticles (SPMNPs) was developed for detection of carbohydrate antigen 72-4 (CA72-4) in human serum. This direct and rapid method did not involve any sample preparation and was accomplished using a test strip in which a sandwich reaction was performed. Probes on the conjugate pad were prepared by coupling monoclonal antibody CC49 specific to CA72-4 onto SPMNPs. Coupled monoclonal antibody B72.3 and goat anti-mouse IgG were loaded onto a nitrocellulose (NC) membrane, serving as the test and control lines, respectively. Initially, results were evaluated by macroscopic observation. Afterwards, the magnetic signal strength of the reaction area was quantified using a magnetic assay reader (MAR). Several parameters that may influence the detection sensitivity were studied and optimized. Under optimal conditions, the proposed method was capable of detecting as low as 0.38 IU/mL of CA72-4 in 20 min and had a wide detection linearity range (0–100 IU/mL). We evaluated 100 clinical samples (70 positive and 30 negative) to assess the validity of these test strips, which exhibited high sensitivity (99 %) and specificity (97 %). The results indicated a high rate of accuracy (98.4–102 %) and a low relative standard deviation according to the average recovery test. In conclusion, the test strips based on SPMNP probes are a rapid, sensitive, and quantitative method for the detection of CA72-4 and possess great potential in point-of-care testing (POCT).
Schematic illustration of the strategy for CA72-4 detection and quantification using a superparamagnetic immunochromatographic strip
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 5
·4204-4210
·
IF 1.798
Huang Xuechen,Zhang Wenqin,Xie Juan,Xu Qi,Zhang Lin,Hao Hua,Liu Hanxing,Cao Minghe
Nb 2 O 5 doped 0.8BaTiO 3 –0.2(Na 1/4 Bi 3/4 )(Mg 1/4 Ti 3/4 )O 3 (0.8BT–0.2NBMT) polycrystalline ceramics were prepared by solid state reaction method. 0.8BT–0.2NBMT samples were observed to possess two dielectric peaks, which were attributed to the formation of core–shell structure (Huang et al. in J Eur Ceram Soc 36:533–540, 2015 ). Longer sintering induced uniform distributions of the additives. The introduction of Nb 2 O 5 into 0.8BT–0.2NBMT could obviously bring about the improvement of the dielectric temperature stability, the degradation of the dielectric loss at room temperature and the decrease of the sintering temperature. The 0.8BT–0.2NBMT ceramics doped with 2.0 at% Nb 2 O 5 could satisfy the temperature range of the X9R (−55 to 200 °C, △C/C 25°C = ±15% or less) characteristics, with a moderate dielectric constant of 1130, low dielectric loss of 0.7%, low sintering temperature of 1050 °C and insulation resistivity of 5 × 10 12 Ω cm at room temperature, which might be promising for practical use in multilayer ceramic capacitors. The inhomogeneous distribution and the existence of the secondary phases were responsible for this excellent dielectric temperature characteristic. The complex impedance analysis was introduced to elaborate the conduction mechanism.
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FOOD AND CHEMICAL TOXICOLOGY
·
2019
·
IF 3.775
Congyong Sun,Wenjing Li,Yingkun Liu,Wenwen Deng,Michael Adu-Frimpong,Huiyun Zhang,Qilong Wang,Jiangnan Yu,Ximing Xu
1-O-(4-hydroxymethylphenyl)-α-L-rhamnopyranoside (MPG) is a phenolic glycoside that exists in Moringa oleifera seeds with various health benefits, whereas its hepatoprotective effect is lacking clarification. Herein, MPG was isolated from Moringa oleifera seeds, and its hepatoprotection against CCl 4 -induced hepatotoxicity in L02 cells and ICR mice was investigated. Toxicity studies showed that MPG did not induce significant changes in organ coefficients and histological analysis, as well as exhibited no cytotoxicity. In vitro studies indicated that MPG substantially increased cell viability and intracellular SOD activities, and significantly inhibited LDH leakage in CCl 4 -treated cells. In vivo studies demonstrated that MPG significantly alleviated CCl 4 -induced hepatotoxicity in mice, as indicated by diagnostic indicators of hepatic injury, as well as the histopathological analysis. Moreover, MPG reduced the lipid peroxidation levels and regulated the inflammatory cytokines. Notably, MPG substantially suppressed the significant elevation of ROS production in hepatocytes of mice intoxicated with CCl 4 . Moreover, TUNEL assay demonstrated that MPG obviously inhibited hepatic apoptosis induced by CCl 4 . Altogether, these results suggested that MPG has excellent liver-protecting effects against hepatocytotoxicity induced by CCl 4 in mice and L02 cells, which can be further developed as a valuable functional food additive or drug for the treatment of hepatic injury.
研究领域:
药理学
·
毒理学
·
肝脏病学
·
营养保健品
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 316
·期 1
·363-368
·
IF 1.181
Song Hu,Wang Guanquan,Wang Jing,Wang Yunhan,Wei Hongyuan,He Jiaheng,Luo Shunzhong
Porphyrin derivatives are usually used for photodynamic therapy (PDT) and labeled with raidonuclide for radiopharmaceuticals. In this work, 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin (TPPOH) and 5,10,15,20-tetrakis (4-aminophenyl) porphyrin (TPPNH 2 ) were labeled by 131 I. 131 I-TPPOH and 131 I-TPPNH 2 were cultured with SMMC-7721 and HL-7702 cells for affinity test. The results show high uptake ratios of SMMC-7721 than HL-7702. 131 I-TPPOH and 131 I-TPPNH 2 were performed radionuclide therapy (RNT) and PDT via tumor in situ injection. At 14 days post injection, the volumes of tumors injected 131 I-TPPOH and 131 I-TPPNH 2 diminished 64 ± 11 and 54 ± 10%, respectively. The therapeutic effect is better than either single PDT or single RNT. The combination therapy of PDT and RNT could be a more effectual method for cancer therapy.
研究领域:
肿瘤学
·
核医学
·
药理学
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Acta Crystallographica Section C-Structural Chemistry
·
2025
·Vol. 81
·期 8
·462-466
·
IF 0.9
Li T.,Fu H.-R.
Exploring blue emission lead-free halides with high photoluminescence quantum yields (PLQYs) is a significant and challenging issue for luminescent materials. Herein, a zero-dimensional (0D) organic–inorganic hybrid halide, namely, bis[4-(4-chlorophenyl)pyridinium] tetrabromidozincate, (C11H9ClN)2[ZnBr4] or [HCPP]2[ZnBr4] [CPP is 4-(4-chlorophenyl)pyridine], was synthesized through acid solution evaporation. The compound crystallizes in the monoclinic space group C2/c. The asymmetric unit consists of a [ZnBr4]2− dianion cluster and two monoprotonated [HCPP]+ cations. The [ZnBr4]2− unit presents an almost undistorted tetrahedral geometry. The [HCPP]+ cations adopt nearly coplanar conformations with small dihedral angles of 5.05 (3)°; there are relatively strong π–π interactions between adjacent [HCPP]+ cations due to slipped parallel packing, with a distance of 3.81 (1) Å. Significantly, this halide exhibits highly efficient blue-light emission (385–500 nm) with a PLQY of 56.35%.
研究领域:
材料科学
·
发光材料
·
无机化学
·
光电功能材料
·
晶体工程
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LANGMUIR
·
2026
·
IF 4.4
Zhengqiu Chen,Junyu Chen,Huaming Mao,Jungang Yin,Yu Ren,Wei Dai,Shuanglong Zhao,Hongwei Yang
Although the preparation of silver nanosheets (AgNSs) through diverse methods has largely advanced over the past few decades, the simple and efficient synthesis of high-quality AgNSs under mild conditions remains challenging. Herein, we report a strategy for preparing rounded and sharp-cornered AgNSs with uniform thicknesses of 30–40 nm via simple liquid-phase reduction. Structural characterization revealed that the reduction reaction rate was mediated by coordination of silver ions with the amino groups of gelatins and the carboxylate ions of glutaric acid (GA), effectively suppressing burst nucleation. Density functional theory calculations further identified the adsorption preference of GA anions on Ag(111) as the key factor that dictates the anisotropic growth of silver nanosheets. Furthermore, selective etching with hydrogen peroxide (H2O2) mediates the morphological evolution of AgNSs from rounded to sharp-cornered morphologies, effectively removing byproduct particles to achieve sharp-cornered AgNSs in yields exceeding 90%. Catalytic performance testing of the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) indicates that the mass-normalized rate constants reached 156.67 and 154.22 s–1 g–1 for the rounded and sharp-cornered AgNSs, respectively. The conversion rate of 4-NP decreased by only about 2% after five consecutive catalytic cycles. This work provides guidelines for the efficient, economical, and green synthesis of two-dimensional metal nanomaterials while offering valuable insights into the application of the AgNSs in the catalytic reduction of 4-nitrophenol.
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