APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 5
·e70141
·
IF 0
Huan Zhang,Wen-Qi Jin,Peng Li,Wei Gao,Xiu-Mei Zhang
A highly efficient photocatalyst, the CdS/Mn-MOF composite, was synthesized by first preparing a new 2D Mn-MOF (Mn(L)·H 2 O, H 2 L = 5-(2-benzothiazolyl)isophthalic acid) precursor through the solvothermal method and subsequently growing CdS nanoparticles. X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV–vis spectroscopy, and other techniques were utilized to characterize the structural, morphological, textural, compositional, and optical properties of the composites. The prepared photocatalysts, designated as X-CdS/Mn-MOF (where X = 50, 25, and 10, represents the mass percentage of CdS), were tested for photocatalytic performance. Among them, the 50-CdS/Mn-MOF sample exhibits the optimized degradation efficiency of 99.1% for Rhodamine B (RhB, 20 mg/L) in 50 min under visible light irradiation, which is 7.3 times and 2.4 times higher than that of Mn-MOF and CdS, respectively. Various test results indicate that the improved photocatalytic activity of CdS/Mn-MOF composites can be attributed to the formation of heterojunctions. Specifically, the heterojunctions enhance the separation efficiency of photogenerated carriers and effectively suppress the recombination of electrons and holes, thereby improving the overall efficiency of the photocatalytic reaction. Moreover, the presence of heterojunctions optimizes the material's band structure, facilitating more efficient carrier transport, which further enhances photodegradation performance. Radical quenching experiments confirmed hydroxyl radicals (·OH − ) and superoxide radical anions (·O 2 − ) played dominant roles in the photodegradation process. Additionally, the composite material also demonstrates good stability and reproducibility. The research further provides evidence that the efficiency of dye degradation can be significantly improved by the rational design of composite catalysts consisting of other semiconductors and MOFs.
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EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
·
2013
·
IF 3.826
Cheng Xie,Jun Chang,Xiao-Dong Hao,Jian-Ming Yu,Hong-Rui Liu,Xun Sun
The aim of this work was to track the distribution and conversion of paclitaxel based prodrug by fluorescence imaging, which would help to up-regulate the therapeutic efficacy and reduce cytotoxicity of paclitaxel and docetaxel . We developed a novel prodrug for tumor treatment, in which a fluorinated docetaxel derivative, 4FDT as a chemotherapeutic reagent and rhodamine B as an imaging reporter as well as targeting domain were conjugated via a biodegradable ester bond. In vitro image studies demonstrated the morphological changes of tubulin and chromosomal alterations of human liver cancer cells HepG2, which were similar to the phenomena observed after treatment with the active drug 4FDT. At 48 h post-treatment, the cytotoxicity of 4FDT-RhB was 18.5% of that of 4FDT. However, this value increased to 49.3% of 4FDT at 72 h post-incubation. These experimental results implied the consistent release of the active drug from the prodrug throughout the incubation period via the linear increase in the cytotoxicity observed as a function of time. It also showed good stability in both plasma and complete blood. Additionally, the specific delivery of the prodrug to mitochondria was observed by fluorescent microscopy.
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jing Li,Yu-Jing Gao,Lu-Lu Hao,Tian Wang,Yi-Ming Zhao,Qiang Liu,Zhiguang Sun,Jiyun Hu,Yin-Shan Meng,Tao Liu
Developing highly efficient photocatalysts for purifying polluted water and degrading organic contaminants has attracted increasing attention. The generation of singlet oxygen (1O2) and superoxide radicals (O2•–) remains a key challenge for achieving high catalytic performance. Herein, a range of metal–organic frameworks (MOFs), denoted as {[MBPDC)]·H2O}n (M = Fe2+ (MOF 1), Co2+ (MOF 2), and Ni2+ (MOF 3); H2BPDC = 2,2′-bipyridine-5,5′-dicarboxylic acid), served as an efficient peroxymonosulfate (PMS) activator for the regioselective oxidation of organic pollutants. Photocatalytic experiments revealed that MOF 2 exhibited superior degradation efficiency toward Rhodamine B (RhB), achieving 99.4% removal within 12 min, significantly faster than MOF 1 (4.5%) and MOF 3 (10.0%). Notably, MOF 2 demonstrated excellent reusability and structural robustness over five consecutive cycles. Through integrated radical scavenging tests and electron paramagnetic resonance (EPR) spectroscopy, 1O2 and O2•– were determined to be the key reactive oxygen species driving the degradation process. The outstanding durability and anti-interference capacity of MOF 2 underscore its practical potential for cost-effective and robust environmental remediation applications.
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DOI
PubMed
高影响因子
Food Analytical Methods
·
2020
·Vol. 13
·期 6
·1255-1261
·
IF 2.667
Wu Zhengzong,He Deyun,Cui Bo,Jin Zhengyu,Xu Enbo
Reliable and sensitive detection of Staphylococcal enterotoxin B (SEB) is important to prevent potential human health risk from foods contaminated by SEB. Here, a triple-channel assay was developed for ultrasensitive detection of SEB. Based on the optical characteristics of tetramers composed of gold nanoparticles (AuNPs) and upconversion nanoparticles (UCNPs), the SEB amounts in food products can be simultaneously detected by using surface-enhanced Raman scattering (SERS), fluorometry, and circular dichroism (CD). Under SERS mode, fluorescence mode, and CD mode, wide linear detection ranges (1–750 pg/mL, 1–750 pg/mL, and 2–500 pg·mL −1 ) were achieved. Furthermore, the practicality of the novel assay was evaluated by determining SEB contents in spiked milk samples. These results indicate that the triple-mode aptasensor is a potential useful tool in quantitative detection of SEB in foods.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Yang Yang,Yifan Zhai,Huaicheng Xiang,Jie Li,Ying Tang,Liang Fang
Herein two cubic garnet ceramics Ca 3 TiBGe 3 O 12 (B = Mg, Zn) were prepared with optimal sintering temperatures of 1300 ℃ and 1200 ℃, respectively. Both ceramics exhibited promising microwave dielectric properties as well as rather low coefficient of thermal expansion ( α L ) of ε r = 11.95, Q×f = 83,000 GHz, τ f = −34.1 ppm/℃ and α L = 3.9 ppm/℃ for Ca 3 TiMgGe 3 O 12 , and ε r = 11.80, Q×f = 79,000 GHz, τ f = −42.9 ppm/℃ and α L = 4.0 ppm/℃ for Ca 3 TiZnGe 3 O 12 . Bond valence calculation reveals that Ca 2+ at the A-site is slightly compressed, Ge 4+ at C-site is rattling, and compressed Mg 2+ /Zn 2+ coexists with rattling Ti 4+ in the B-site. The large positive deviations (17.22% for Ca 3 TiMgGe 3 O 12 and 10.90% for Ca 3 TiZnGe 3 O 12 ) between the porosity corrected ε r (Corr) (12.32 and 12.41) and calculated ε r (C-M) (10.51 and 11.19) by the C-M equation were observed, which might be attributed to the combination of rattling effects in B-site and C-site. The relatively stronger rattling effect in Ca 3 TiMgGe 3 O 12 leads to a higher ε r and a τ f closer to zero than those of Ca 3 TiZnGe 3 O 12 . Besides, the Q×f values of Ca 3 TiBGe 3 O 12 (B = Mg, Zn) ceramics are mainly affected by relative density, packing fraction, and Raman mode (A 1 g ).
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RSC Advances
·
2020
·Vol. 10
·期 50
·29668-29674
·
IF 3.119
Shuangxia Wu,Fengjie Geng,Suqin He,Wentao Liu,Hao Liu,Miaoming Huang,Chengshen Zhu
To increase the bioavailability and water solubility of hydrophobic medicine, an amphiphilic block copolymer, polycaprolactone-block-polyhydroxyethyl acrylamide (PCL-b-PHEAA), was synthesized. The copolymer can self-assemble into micelles by dialysis. The micelles were characterized by the Tyndall effect, static drop method, fluorescence spectrometry, dynamic light scattering, scanning electron microscopy and transmission electron microscopy. Ibuprofen was encapsulated inside the micelles by dialysis as a model medicine. The results show that the amphiphilic copolymer forms a uniform micelle system, with spherical micelles dispersed well in solution which have a low critical micelle concentration. In addition, the system shows good amphipathic behavior. Average particle size of a micelle is 104 nm, which increases a lot after drug loading and standing for half a month. In the first few hours, the cumulative release of the drug increases gradually; the rate of increase in the first ten hours is faster, then reaching a plateau which tends to be flat finally. It is similar under two different pH conditions. This biocompatible, biodegradable amphiphilic block copolymer has potential applications in the biomedical field.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 6
·1847-1859
·
IF 2.647
Li Chunxia,Guo Xin,Du Hongmei,Zhao Jinsheng,Liu Lixia,Yuan Qing,Fu Chonggang
Two novel donor-acceptor (D-A)-conjugated polymers, poly[(thiophene-2,5-yl)-((benzo[1,2-b:6,5-b′]dithiophene-4,5-dione)-2,7-yl)] (PTDT) and poly[((2,3-dihydrothieno[3,4-b] [ 1 , 2 ]dioxine)-5,7-diyl)-((benzo[1,2-b:6,5-b′]dithiophene-4,5-dione)-2,7-diyl)] (PTDO), have been synthesized with the same acceptor unit of benzo[1,2-b:6,5-b′]dithiophene-4,5-dione and different donor units of thiophene (Th) and 3,4-ethylenedioxothiphene (EDOT), respectively. And then, two composites (PTDT@C and PTDO@C) are made by coating the polymers on the surface of active carbon with an in situ method, which are used as the electrode materials of lithium-ion battery. The reversible capacities of PTDT@C and PTDO@C are 246.9 and 322.3 mAh g −1 at 0.1 A g −1 after 300 cycles running, respectively. By deducing the capability contribution of pure carbon, the theoretical capacities of the pure polymers are calculated to be 596 and 991 mAh g −1 , respectively, for PTDT and PTDO, which correspond to the lithium storage number of 6.7 and 13.3, respectively, for the least repeating unit of the polymers. With the help of theoretical calculations, the underlying mechanisms for the different electrochemical performances of the polymers are discussed and revealed. The structure-activity relationship discussed in this work may provide the design principle for the construction of the D-A-type polymers used as high-capacity electrode materials for organic rechargeable batteries.
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ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Liuqing Xiao,Yuxing Huang,Yu Luo,Bo Yang,Yizhen Liu,Xuechang Zhou,Junmin Zhang
Cotton fiber is an abundant natural material, which has a long history of application in human daily life. However, a report on using such material in catalysis for organic synthesis is rare. We envisaged that the hydroxyl groups on the surface of cotton fiber could be utilized for functionalization and further immobilization of organic catalysts. In this report, we demonstrate the facile functionalization of cotton fiber by growing polymer brushes on its surface and further anchoring of Rose Bengal (RB) organic photocatalyst. This novel composite cotton photocatalyst demonstrated high efficiency in catalyzing cross-dehydrogenative coupling reactions and N-demethylation reactions with irradiation of visible light. The catalytic reaction can be facilely scaled up by a homemade circulating flow reactor.
研究领域:
化学工程
·
材料科学
·
有机合成
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Xiao-Liang Mao,Dong-Xing Xu,Ming-Lai Fu,Baoling Yuan,Jian-Wen Shi,Hao-Jie Cui
Zn 2 GeO 4 nanobelts modified by CdS quantum dots (Zn 2 GeO 4 /CdS) were prepared successfully by chemical bath deposition. The novel photocatalyst was characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and UV–Vis diffuse reflectance spectroscopy. It was found that Zn 2 GeO 4 /CdS consisted of uniform rhombohedral phase Zn 2 GeO 4 nanobelts with highly dispersed cubic phase CdS quantum dots, and the Zn 2 GeO 4 /CdS exhibited strong visible light absorption at about 510 nm. The photocatalytic activities of the catalysts were evaluated by the discoloration of Rhodamine B under visible light illumination and were compared with that of pure Zn 2 GeO 4 nanobelts. The results suggested that the composite photocatalyst had much higher photocatalytic activities than pure Zn 2 GeO 4 nanobelts under irradiation of visible light. Meanwhile, no obvious deactivation of Zn 2 GeO 4 /CdS was observed after the three recycles experiments in photodegradation of RhB. The possible mechanism of visible light photocatalytic degradation is also proposed.
研究领域:
材料科学
·
环境科学
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Functional Materials Letters
·
2021
·
IF 2.17
Xu Huang,Yiwen Zhang,Zhi Liang,Yingfeng Zhao,Huiwen Yuan,Mingyang Li,Fengping Peng,Wei Wang
In this paper, a series of isotype heterojunction photocatalysts with urea-derived g-C 3 N 4 (CNU) as the core and cyanamide-derived g-C 3 N 4 (CNC) as the shell are reported. A much thinner CNC shell which can protect the CNU core from thermal etching and determines the light absorption is beneficial to improve the photocarrier transfer and separation efficiency, pore volume, and the overall crystalline degree of the most active CNU/CNC2 core–shell isotype heterojunction photocatalyst for rhodamine B (RhB) degradation. Contrast experiments confirm that the electron-derived oxidant species (⋅O 2 − ) play key roles in driving the RhB degradation.
研究领域:
材料科学
·
环境科学
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2018
·Vol. 219
·期 18
·1800189
·
IF 2.492
Meina Xiao,Jingxing Jiang,Tongtong Zhang,Anli Xu,Zhuofeng Ke,Liangzhi Hong
The hybrid copolymerization of vinyl monomers with cyclic esters endows the formed copolymers new features, such as biodegradability and functionality. However, the recently reported hybrid copolymerizations are mainly based on polar vinyl monomers and cyclic esters catalyzed by organocatalysts. The copolymerization of non-polar vinyl monomers with cyclic esters is still a challenge. In this work, the copolymerization of β-butyrolactone (β-BL) with styrene catalyzed by B(C 6 F 5 ) 3 in the absence of coinitiators is reported. The density functional theory studies suggest the formation of zwitterion between β-BL and B(C 6 F 5 ) 3 . It is found that β-BL and styrene are concurrently copolymerized through the macro-zwitterion intermediates. The obtained copolymers are carefully examined by 1 H NMR, 2D 1 H- 13 C HMBC, differential scanning calorimetry, thermogravimetric analysis, hydrolysis experiments, as well as Brady's reagents.
研究领域:
高分子化学
·
有机化学
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Li Liuqing,Wei Zhengwen,Lü Xiang-fei,Jiang Zhen-Yi,Wang Wei
By utilizing the in situ polymerization reaction of o-tolidine and p-phthalaldehyde, magnetic inorganic/organic hybrid materials were synthesized. Various characterization techniques were employed to analyze the morphology and phase composition of the materials. Using Rhodamine B as a characteristic pollutant, it was found that the maximum adsorption capacity of the materials reached 171.59 mg/g. Density functional theory (DFT) calculations were conducted on different adsorption configurations, revealing that the adsorption process is primarily dominated by π–π interactions, alongside electrostatic attraction and donor–acceptor interactions. This provides a theoretical basis for the subsequent design and preparation of more efficient adsorption materials.
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高影响因子
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