JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Guo-Cheng Liu,Yan Li,Ying Xiong,Xiang-Xiang Liu,Qiao-Min Li,Ju-Wen Zhang,Hong-Yan Lin,Xiao-Wu Li
To investigate the effect of the spacers of S-/O-bridged dipyridylamides on the structures of Co(II)/Zn(II) complexes, [Co(L1)(chda)]·1.5H2O (CP1), [Co(L2)(chda)] (CP2), [Zn(L1)(hip)]·DMA·2H2O (CP3), and [Zn(L2)(hip)]·2.8H2O (CP4) [L1 = N,N′-bis(pyridine-3-yl)thiophene-2,5-dicarboxamide, H2chda = trans-1,4-cyclohexanedicarboxylic acid, L2 = N,N′-bis(pyridine-3-yl)-4,4′-oxybis(benzoic) dicarboxamide, H2hip = 5-hydroxyisophthalic acid, DMA = N,N-dimethylacetamide], have been solvothermally synthesized. X-ray single-crystal diffraction shows that CP1 is a 2-D 3,5-connected network based on Co-L1 linear chains and (Co-chda)2 double chains. CP2 features a 1-D structure derived from 1-D wave-like (Co-chda)2 double chains decorated by terminal L2 ligands. CP3 and CP4 show wave-like (4,4) networks constructed by 1-D Zn-L1 zigzag and Zn-hip zigzag (for CP3)/linear (for CP4) chains. The effect of the spacers of S-/O-bridged dipyridylamides on the structures of the title complexes was discussed. Electrochemical behaviors of CP1–CP2 and solid-state luminescent properties of CP3–CP4 were studied. The luminescence investigations show that CP3 and CP4 are recycled fluorescent probes for environmentally relevant Fe3+ ions. The photocatalytic properties for the degradation of methylene blue (MB) under ultraviolet light irradiation of CP3–CP4 and the recyclable materials after fluorescent sensing Fe3+ ions (named CP3@Fe3+ and CP4@Fe3+) have also been investigated.
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ACS Applied Energy Materials
·
2018
·
IF 0
Junjie Fu,Jie Fu,Qingwen Tian,Houlin Wang,Fengming Zhao,Jun Kong,Xiangyun Zhao,Sixin Wu
The Se content in a Cu2ZnSn(S, Se)4 absorber layer has a significant impact on the electronic properties, but it is rather challenging to control the Se/(S + Se) ratio due to a complicated selenization process. Here, a low-toxicity thiol/amine-based solution process was developed to tune the Se content in a Cu2ZnSn(S, Se)4 absorber layer to an optimal value by ingeniously controlling the SeO2 in the precursor solution. We demonstrated that the crystal growth and the band gap of Cu2ZnSn(S, Se)4 thin films are affected by the Se/(S + Se) ratio. By this approach, the open-circuit voltage deficit (Voc,def) of the device was effectively decreased, and the short-circuit density (Jsc) and fill factor (FF) were remarkably improved; thus, the power conversion efficiency of the Cu2ZnSn(S, Se)4 solar cells was successfully increased from 5.6% to 9.7% for the optimal band gap (Eg = 1.13 eV).
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RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
·
2018
·Vol. 44
·期 7
·454-459
·
IF 0.674
Ye H. D.,Zhan Y. L.,Liang J.,Ye T. Y.,Zhang D.,Peng H. N.,Hu J. R.
Treatment of o -carborane, n -butyllithium, sulfur (or selenium) and MeCpCo(CO)I 2 (or Cp*Co(CO)I 2 ) (Cp* = pentamethylcyclopentadienyl) under argon leads to half-sandwich carborane complex MeCpCo(S 2 C 2 B 10 H 10 ) (I) (or Cp*Co(Se 2 C 2 B 10 H 10 ) ( II )). Complex I reacts with triphenylphosphine to afford addition product MeCpCo(S 2 C 2 B 10 H 10 )(PPh 3 ) ( III ). However, II does not react with triphenylphosphine. Complexes II and III have been characterized by elemental analysis, mass, NMR spectroscopy, IR and X-ray structural analyses (CIF files CCDC nos. 1571705 ( II ) and 1571706 ( III )).
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 8
·7834-7843
·
IF 2.8
Yang Hang,Zhang Li,Hou Guangying,Liu Chunguang
As an alternative to bisphenol A, bisphenol S (BPS) is widely used in industrial production and daily life, which is then discharged into sewage treatment plants and accumulates in sludge. In this research, impact and interaction mechanism of BPS on lipids hydrolysis in sludge is studied from the respect of soluble organic matter and volatile organic fatty acids (VFAs). Multi-spectra, thermodynamics, molecule docking, and enzyme activity assay are applied to elucidate the effect mechanism of BPS on lipids hydrolysis. Results show that lipids hydrolysis is restrained due to the denaturation of lipase with BPS exposure. The interaction mechanism is involved in hydrophobic bond and hydrogen bond interaction in the activity region of lipase. This interaction not only results in an unfolding skeleton structure of lipase and a less hydrophobic microenvironment of tyrosine and tryptophan residues but also leads to fluorophore static quenching with the formation of lipase-BPS complex. The experimental results and the combined research methods not only contribute to the development of novel technique for sludge treatment containing micropollutant but also profit to clarify the interaction mechanism between other micropollutant and enzymes.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ning Wan,Zipeng Xing,Junyan Kuang,Zhenzi Li,Junwei Yin,Qi Zhu,Wei Zhou
In-situ oxygen vacancy-mediated C-N-S-tridoped single crystal black TiO 2 (B) nanorods are smoothly manufactured. The sample preparation is divided into two steps, first of all, a simple hydrothermal process, followed by an in-situ solid-state chemical substitution method with calcination at 500 °C. We have a number of representations of the catalyst such as crystallinity, morphological structure, etc. by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–vis diffuse reflectance spectroscopy, respectively. This b-C-N-S-TiO 2 (B) has the advantages of Oxygen Vacancy, single crystal structure of nanorods, Ti 3+ self-doping, C-N-S-tridoped, so this sample band gap is narrow. Moreover, through the reduction of phenol and Cr(VI), we know the photocatalytic performance of the b-C-N-S-TiO 2 (B), the reduction efficiency of phenol and Cr(VI) is ∼6.1 times and ∼7 times of no doping samples, respectively, under visible light illumination. The predominant photocatalytic performances because of the synergetic action of Ti 3+ self-doping, C-N-S-tridoped, oxygen vacancy, and the 1D single crystal B phase nanostructure, favoring the separation and transportation of photogenerated charge carriers and the visible light utilization.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Chunquan Li,Zhiming Sun,Wanzhong Zhang,Caihong Yu,Shuilin Zheng
A novel 3D heterogeneous g-C 3 N 4 /TiO 2 /kaolinite composite with enhanced visible light activity was fabricated via a mild sol-gel method associated with chemical stripping and self-assembly. Compared with bare photocatalysts, the g-C 3 N 4 /TiO 2 /kaolinite 3D structure exhibits enhanced adsorption-photocatalytic degradation ability for the removal of ciprofloxacin (CIP) under visible-light irradiation, and also facilitate the recyclability of the photocatalyst as demonstrated from the reusability test. The apparent rate constant of the composite is up to around 5.35 times, 6.35 times and 4.49 times that of bare TiO 2 , g-C 3 N 4 and P25, respectively, and a possible degradation pathway was also proposed. On the other hand, the as-received composite also exhibited enriched disinfection ability towards S. aureus . It is indicated that the superoxide radical ( O 2 − ) is the main active species in the degradation process, and the superior photocatalytic performance of composite should be mainly attributed to both the improvement of light harvesting as well as the enhanced separation and transfer efficiency. It is expected that this novel ternary visible-light responding composite would be a promising candidate material for the organic pollutants degradation and bacteria inactivation.
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TALANTA
·
2025
·
IF 6.1
Lijun Wang,Jiangchuan Tang,Shanshan Ren,Haixia Hu,Xiao Yang,Xianggui Chen
Although many colorimetric methods have been developed for on-site pesticide detection, most exhibit low sensitivity and limited resistance to interference. To address these issues, this study developed a novel dual-mode colorimetric-ratiometric fluorescence method for isocarbophos (ICP) detection using sulfur and nitrogen co-doped carbon nanodots (S, N-CDs) to inhibit catalytic Fe 3 O 4 @Cu-BTC nanozyme activity. The synthesized Fe 3 O 4 @Cu-BTC nanozymes with higher peroxidase-like activity were inhibited by S, N-CDs. The inhibitory mechanism was deeply investigated and was ascribed to (1) the restriction of the reaction between Fe 3 O 4 @Cu-BTC and hydrogen peroxide (H 2 O 2 ), which decreased the ·OH production, and (2) the ·OH scavenging ability of the S, N-CDs, forming the basis of the dual-mode method. The Fe 3 O 4 @Cu-BTC/Apt-complementary strand (CS)/S, N-CDs hybridization complexes demonstrated minimal to no peroxidase-like activity, preventing H 2 O 2 from oxidizing o -phenylenediamine (OPD) to produce yellow fluorescent 2,3-diaminophenazine (DAP). Meanwhile, the detection system demonstrated a low fluorescence intensity ratio (I 575 /I 465 ) at an excitation wavelength of 390 nm. However, the presence of ICP caused the CS/S, N-CDs to separate from the Fe 3 O 4 @Cu-BTC/Apt due to the high affinity between Apt and ICP. Then, the Fe 3 O 4 @Cu-BTC/Apt-ICP complexes recovered peroxidase-like activity, which promoted DAP production, accompanied by a pronounced fluorescence intensity ratio (I 575 /I 465 ). In optimum conditions, the detection limits (LODs) were 2.79 ng/mL (colorimetric) and 0.26 ng/mL (ratiometric fluorescence), respectively. The feasibility of the proposed method was verified via three spiked samples, yielding recovery rates of between 86.08 % and 112.64 %, indicating the significant potential for the highly sensitive, accurate on-site detection of ICP in actual samples.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Xuanxuan Liu,Qingliu Wu,Yong Cao,Lu Wang,Hao Qu,Lei Zheng
l -cysteine plays a vital role in both the nutritional value and taste profile of chicken broth, underscoring the necessity for an accurate and sensitive approach to detect and measure l -cysteine at minute concentrations. A reliable method for identifying trace amounts of l -cysteine is imperative for ensuring the quality and authenticity of chicken broth products. Such a technique would enable precise control over the levels of this crucial amino acid, ultimately contributing to the overall consumer satisfaction and product consistency. This research focused on developing an SGGT-based sensor for the rapid detection of l -cysteine by leveraging the self-assembly of l -cysteine molecules on the surface of the Au gate electrode to form covalent Au-S bonds. This process triggers a rearrangement of charge carriers on the surface, leading to a shift in the electric double layer potential. Through field effect amplification, a substantial channel current response is generated. This innovative sensing mechanism effectively addresses the selectivity challenges of SGGT in complex liquid environments, significantly enhancing its ability to detect l -cysteine. Subsequently, the study examined three different gate voltages, with the optimal voltage achieving a detection limit of 10 nM (1.21 ng/mL) and a linear detection range of 30 nM – 3 μM. Moreover, the sensor exhibits highly selective detection of l -cysteine in chicken broth, demonstrating an 85.87 % recovery rate. The innovative technology demonstrates encouraging prospects for real-world usage in the identification of l -cysteine in food items or as a biomarker. Its capabilities offer a reliable method for detecting this amino acid, showcasing its versatility and potential impact on food safety and quality assessment.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Hao Wang,Nanping Deng,Yayi Lu,Yongbing Jin,Geng Li,Bowen Cheng,Weimin Kang
In this study, the CoP-Co 2 P heterojunction nanoparticles embedded in N-doping porous carbon nanofibers (CoP-Co 2 P/NPCNFs) are designed and prepared. The highly conductive grid of NPCNFs can physically confining lithium polysulfide (LiPS) and provide facilitated channels for Li + transport. Furthermore, due to the spontaneous built-in electric field (BIEF) based on at the formed heterogeneous interfaces of CoP-Co 2 P, the heterojunction can significantly catalyze bi-directional conversion of LiPS and chemically adsorb LiPS which confirmed by the DFT calculations, suppressing the “shuttle effect” of LiPS. Thus, the Li-S batteries with the CoP-Co 2 P/NPCNFs modified separators exhibit a high initial specific capacity of 1322.86 mAh g −1 at 1 mA cm −2 and stable 695 cycles with a low decay rate (0.069 %). More importantly, the assembled pouch cell also can run with ultra-low specific capacity decay rate. Additionally, the pouch battery can also be applied to the operation of fans, temperature and humidity meters, mobile phone charging, etc.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 2
·1-11
·
IF 2.101
Du Yingying,Yang Ping,Matras-Postolek Katarzyna,Wang Junpeng,Che Quande,Cao Yongqiang,Ma Qian
A silanization process was employed to transfer hydrophobic quantum dots (QDs) prepared via an organic route at high temperature into water phase. The QDs were further coated with a thin organic SiO 2 shell to form QDs@SiO 2 composite nanoparticles by ligand exchange or remaining initial organic ligands on the surface. In this study, QDs with different ligands, either trioctylphosphine oxide (TOPO) or oleic acid (OA), were employed to investigate the effects of ligands on the reverse micelles in preparing QDs@SiO 2 nanoparticles. In the preparing process, hydrophobic QDs were silanized by partially hydrolyzed tetraethyl orthosilicate (TEOS). For TOPO-capped CdSe QDs, surface TOPO ligands were completely replaced by partially hydrolyzed TEOS. As for OA-capped CdSe/Cd
x
Zn 1− x
S QDs, surface OA ligands were partially replaced. It was found that the ligand exchange drastically reduced the photoluminescence (PL) efficiency of CdSe QDs. Furthermore, the cytotoxicity studies of QDs@SiO 2 have been carried out in detail. The results indicate that CdSe/Cd
x
Zn 1− x
S QDs@SiO 2 composite nanoparticles exhibit lower cytotoxicity compared with CdSe QDs@SiO 2 , because the SiO 2 shell and remained OA ligand layer can effectively prevent the leakage of toxic Cd 2+ ions. Meanwhile, it was found that these CdSe/Cd
x
Zn 1− x
S QDs@SiO 2 nanocomposites could keep excellent PL properties even for 24 h incubating with Siha cells, which indicating that our prepared composite nanoparticles are potentially applicable for cell imaging in biological systems.
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BIOMACROMOLECULES
·
2015
·
IF 5.75
Zhao Wang,Ting Luo,Ruilong Sheng,Hui Li,Jingjing Sun,Amin Cao
In this work, a series of diblock terpolymer poly(6-O-methacryloyl-d-galactopyranose)-b-poly(methacrylic acid-co-6-cholesteryloxy hexyl methacrylate) amphiphiles bearing attached galactose and cholesterol grafts denoted as the PMAgala-b-P(MAA-co-MAChol)s were designed and prepared, and these terpolymer amphiphiles were further exploited as a platform for intracellular doxorubicin (DOX) delivery. First, employing a sequential RAFT strategy with preliminarily synthesized poly(6-O-methacryloyl-1,2:3,4-di-O-isopropylidene-d-galactopyranose) (PMAIpGP) macro-RAFT initiator and a successive trifluoroacetic acid (TFA)-mediated deprotection, a series of amphiphilic diblock terpolymer PMAgala-b-P(MAA-co-MAChol)s were prepared, and were further characterized by NMR, Fourier transform infrared spectrometer (FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and a dynamic contact angle testing instrument (DCAT). In aqueous media, spontaneous micellization of the synthesized diblock terpolymer amphiphiles were continuously examined by critical micellization concentration assay, dynamic light scattering (DLS), and transmission electron microscopy (TEM), and the efficacies of DOX loading by these copolymer micelles were investigated along with the complexed nanoparticle stability. Furthermore, in vitro DOX release of the drug-loaded terpolymer micelles were studied at 37 °C in buffer under various pH conditions, and cell toxicities of as-synthesized diblock amphiphiles were examined by MTT assay. Finally, with H1299 cells, intracellular DOX delivery and localization by the block amphiphile vectors were investigated by invert fluorescence microscopy. As a result, it was revealed that the random copolymerization of MAA and MAChol comonomers in the second block limited the formation of cholesterol liquid-crystal phase and enhanced DOX loading efficiency and complex nanoparticle stability, that ionic interactions between the DOX and MAA comonomer could be exploited to trigger efficient DOX release under acidic condition, and that the diblock terpolymer micellular vector could alter the DOX trafficking in cells. Hence, these suggest the pH-sensitive PMAgala-b-P(MAA-co-MAChol)s might be further exploited as a smart nanoplatform toward efficient antitumor drug delivery.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Qi Zhao,Junting Li,Xiaoqian Zhang,Zhengping Li,Yanli Tang
We designed and synthesized a novel oligo(thiophene ethynylene) (OTE) to investigate the antibacterial activities against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative (Ralstonia solanacearum and Escherichia coli) bacteria in vitro by photodynamic therapy (PDT). Notably, OTE presents broad-spectrum and greatly high antibacterial activities after white light irradiation at nanogram per milliliter concentrations. The half inhibitory concentrations (IC50) values obtained for S. aureus, S. epidermidis, E. coli, and R. solanacearum are 8, 13, 24, and 52 ng/mL after illumination for 30 min, respectively, which are lower than that of other PDT agents. Interestingly, OTE shows the specific and very strong dark killing capability against S. aureus at the concentration of 180 ng/mL for 30 min, which is the highest efficiency biocide against S. aureus without the need of irradiation to date. The antibacterial mechanism investigated demonstrated that reactive oxygen species or singlet-oxygen generated by OTE kills bacteria irreversibly upon white light irradiation, and OTE as a v-type oligomer exerts its toxicity directly on destroying bacterial cytoplasmic membrane in the dark. Importantly, the OTE shows no cell cytotoxicity and excellent biocompatibility. The results indicate that it is potential to provide versatile applications in the efficient control of pathogenic organisms and specific application for killing S. aureus.
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