FOOD CHEMISTRY
·
2021
·
IF 7.514
Xueqing Gao,Xiaowen Gu,Qi Min,Yueyue Wei,Chunyuan Tian,Xuming Zhuang,Feng Luan
In this work, we demonstrate a novel solid-state electrochemiluminescence (ECL) sensor based on the Ru(bpy) 3 2+ @terbium-guanosine monophosphate infinite coordination polymer network ((Ru(bpy) 3 2+ @Tb-GMP ICPn). Comparing with the traditional luminescence of Ru(bpy) 3 2+ observed in a liquid system, the proposed method of encapsulating Ru(bpy) 3 2+ into ICPn for immobilization greatly improves the ECL signal and efficiency, which is attributed to the unique porous structure and large specific surface area of ICPn. Moreover, the solid-state Ru(bpy) 3 2+ ECL sensor has good biocompatibility and low toxicity. Taking histamine (HA) as a detection model, a good linear relationship between ECL intensity and logarithm of HA concentration was obtained with a low detection limit of 17 nM, and satisfactory results were obtained for detecting HA levels in fish samples as well. The proposed solid-state Ru(bpy) 3 2+ ECL sensor has great application prospects in the safety of food.
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高影响因子
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY
·
2021
·Vol. 26
·期 7
·793-808
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IF 3.358
Chen Jincan,Deng Yuanyuan,Wang Jie,Chen Suxiang,Peng Fa,He Xuerong,Liu Meijun,Luo Hui,Zhang Jingjing,Chen Lanmei
Abstract Two new cyclometalated Ru(II)-β-carboline complexes, [Ru(dmb) 2 (Cl-Ph-βC)](PF 6 ) (dmb = 4,4′-dimethyl-2,2′-bipyridine; Cl-Ph-βC = Cl-phenyl-9H-pyrido[3,4-b]indole; RuβC-3 ) and [Ru(bpy) 2 (Cl-Ph-βC)](PF 6 ) (bpy = 2,2′-bipyridine; RuβC-4 ) were synthesized and characterized. The Ru(II) complexes display high cytotoxicity against HeLa cells, the stabilized human cervical cancer cell, with IC 50 values of 3.2 ± 0.4 μM ( RuβC-3 ) and 4.1 ± 0.6 μM ( RuβC-4 ), which were considerably lower than that of non-cyclometalated Ru(II)-β-carboline complex [Ru(bpy) 2 (1-Py-βC)] (PF 6 ) 2 (61.2 ± 3.9 μM) by 19- and 15-folds, respectively. The mechanism studies indicated that both Ru(II) complexes could significantly inhibit HeLa cell migration and invasion, and effectively induce G0/G1 cell cycle arrest. The new Ru(II) complexes could also trigger apoptosis through activating caspase-3 and poly (ADP-ribose) polymerase (PARP), increasing the Bax/Bcl-2 ratio, enhancing reactive oxygen species (ROS) generation, decreasing mitochondrial membrane potential (MMP), and inducing cytochrome c release from mitochondria. Further research revealed that RuβC-3 could deactivate the ERK/Akt signaling pathway thus inhibiting HeLa cell invasion and migration, and inducing apoptosis. In addition, RuβC-3 -induced apoptosis in HeLa cells was closely associated with the increase of intracellular ROS levels, which may act as upstream factors to regulate ERK and Akt pathways. More importantly, RuβC-3 exhibited low toxicity on both normal BEAS-2B cells in vitro and zebrafish embryos in vivo. Consequently, the developed Ru(II) complexes have great potential on developing novel low-toxic anticancer drugs. Graphic Abstract
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高影响因子
FUEL
·
2021
·
IF 6.609
Yishuang Wu,Zixiang Lin,Xun Zhu,Xun Hu,Mortaza Gholizadeh,Hongqi Sun,Yong Huang,Shu Zhang,Hong Zhang
Catalytic hydrogenolysis of lignin to phenolic monomers has received a lot of attention, but it is still a challenge because the cleavage of the strong C(sp 2 )-O/C bonds between structural units is usually under harsh conditions, resulting in the presence of the competing reaction of hydrogenation. Herein, hydrogenolysis of an herbaceous lignin into phenolic monomers was performed over Ru supported on various (non)-functionalized graphitized carbon nanotubes (CNT, CNT-OH, CNT-COOH, and CNT-NH 2 ), which were featured by different hydrogenation performances originally from the diverse metal-support interactions. Among the investigated supports, CNT-NH 2 enables the formation of the finest Ru nanoparticles with an average size of 1.86 nm, leading to the highest yield of phenolic monomers from lignin hydrogenolysis. The best hydrogenolysis performance of Ru@CNT-NH 2 was mainly from the partial hydrogenation of C(sp 2 )-O/C bonds to C(sp 3 )-O/C bonds in lignin, thus reducing their bond dissociation energy (BDE). The intimacy between hydrogenolysis and hydrogenation was further proved by depolymerization of a lignin β-O-4 model compound.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Lirong Lv,Sheng Wang,Ya Ding,Lei Zhang,Yang Gao,Shudong Wang
In this study, the divergent behaviors were elucidated for CH2Cl2 and CH3Br oxidation over TiO2 and Ru/TiO2. Possible reaction mechanisms were elucidated. It was concluded that the adsorption and activation of halogenated volatile organic compounds were strongly dependent on the hard–soft acid–base theory.
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Catalysis Science & Technology
·
2019
·Vol. 10
·期 2
·440-449
·
IF 5.726
Pengqi Zhu,Jin Zhang,Jie Wang,Peng Kong,Yunwei Wang,Zhanfeng Zheng
Hydroxyl coordinated ruthenium dispersed on the surface of γ-Al2O3 can be applied to the selective oxidation of amines with light irradiation and an atmospheric pressure of O2 at room temperature. Sunlight is also an effective light source for the selective aerobic oxidation of primary amines to corresponding nitriles. The high photocatalytic activity and selectivity over Ru/γ-Al2O3 originate from the adsorption of amines and imine intermediates on the abundant surface OH groups of the photocatalyst and further formation of Ru–amide species by ligand exchange of adsorbed amines and imine intermediates with adjacent exposed active Ru sites. Light is introduced to the system successfully via the formation of Ru–amide species, which are used as the light absorption sites of the photocatalytic selective oxidation of amines. Primary amines are directly converted to corresponding nitriles via a two-step oxidative dehydrogenation process.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Lifang An,Jie Fan,Buhuan Wang,Jingyi Yang,Guolian Wang,Meng Zhang,Zhongyi Liu
Ru/Fumed SiO 2 achieves 100% DMT conversion and 100% DMCD selectivity. • Macropores of Fumed SiO 2 lower diffusion barriers and enhance active site utilization. • Strong Ru-O-Si interaction promotes Ru dispersion and ensures 5-cycle reusability. • Low apparent activation energy enables high-efficiency aromatic ring hydrogenation. The growing accumulation of waste polyethylene terephthalate (PET) causes severe resource depletion and environmental pollution, making its high-value chemical recycling essential for sustainable development. PET methanolysis affords dimethyl terephthalate (DMT), and its selective hydrogenation to dimethyl 1,4-cyclohexanedicarboxylate (DMCD) connects waste PET valorization with high-performance polyester synthesis. Herein, a series of Ru-based catalysts supported on microporous-dominated S-1, ordered mesoporous MCM-41 and SBA-15, and Fumed SiO 2 with the open interparticle macro-mesoporous were prepared by the incipient wetness impregnation, and the role of support pore structure in DMT hydrogenation to DMCD was systematically examined. The results show that the open interparticle macro-mesoporous framework of Fumed SiO 2 alleviates diffusion constraints and improves the accessibility of Ru active sites. This structure enables uniform Ru dispersion, giving Ru/Fumed SiO 2 the smallest average Ru particle size (6.0 nm). Surface Si-OH groups anchor Ru species through Ru-O-Si interfacial structures, which strengthens metal-support interactions and promotes H 2 activation and active-site utilization. Under 180 °C, 3.0 MPa H 2 , and 3 h, Ru/Fumed SiO 2 delivers 100% DMT conversion and 100% DMCD selectivity. It also shows the lowest apparent activation energy (39.0 kJ·mol −1 ), stable performance over five cycles, and over 93% conversion and selectivity for representative substituted aromatic compounds. These findings demonstrate that an open interparticle macro-mesoporous framework could improve molecular accessibility, mitigate mass-transfer limitations, and enhance hydrogenation efficiency. Download: Download high-res image (185KB) Download: Download full-size image
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Materials Horizons
·
2023
·Vol. 10
·期 12
·5712-5719
·
IF 13.3
Mengmeng Wang,Yunmei Du,Shuangshuang Li,Xiaoli Sun,Bin Li,Yuanxiang Gu,Lei Wang
The N-doping strategy plays a vital role in optimizing electrocatalytic performance, but it often requires high-temperatures accompanied by the emission of irritating gases, which is contrary to the concept of energy saving and environmental protection. Based on this, this work innovatively uses the quenching of waste heat and the non-equilibrium state of materials to realize controllable N-doping. Notably, N dopants stimulate metal-like electroconductivity and accelerate the alkaline HER kinetics by optimizing the electronic structure of Ru2P. Surprisingly, the hydrophilic Ru core and the N-Ru2P shell with a low HER reaction energy barrier synergistically expedite hydrogen release. As anticipated, the current density of N-Ru2P@Ru (963 mA cm−2) is 2.6-fold that of Pt/C (359 mA cm−2) at 150 mV. Overall, the novel N-doping technology greatly simplifies material preparation procedures and reduces energy consumption. Moreover, this unique N-doping strategy provides a new idea for optimizing the catalyst structure and reaction kinetics.
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高影响因子
CATALYSIS LETTERS
·
2018
·Vol. 149
·期 1
·180-189
·
IF 2.911
Hu Yin,Chen Wei,Ba Mingwei,Song Weiguo
Solvent-free selective hydrogenation of α -pinene to synthesize cis -pinane with high efficiency has always been a challenge in the catalytic research. The key to achieve this goal is the development of the highly efficient and recyclable catalysts. Cubic NaNbO 3 crystals were functionalized by (γ-aminopropyl)-triethoxysilane (APTS) and decorated with Ru species by a simple solvothermal approach combined with a sol-gel method. And this compound was applied to the catalytic hydrogenation of α -pinene. The crystal phase, chemical structure and surface components of the catalysts were analyzed by X-ray diffraction, field emission transmission electron microscope, X-ray photoelectron spectroscopy, Fourier transform infrared spectra and thermogravimetric analysis. APTS-functionalization of the catalyst surface contributes to the highly dispersed and uniform Ru species with small particle size, leading to the outstanding conversion of α -pinene and selectivity of cis -pinane over NaNbO 3 /APTS/Ru catalyst. The performance of this catalyst is better than that of other similar catalysts, and is comparable to that of commercial Ru/C. The possible mechanisms of the formation of catalyst and the hydrogenation reaction were proposed and discussed. The decrease of catalytic performance after seven cycles should be ascribed to the decomposition and leaching of APTS during the hydrogenation process. The work provides an alternative strategy to design a kind of reusable catalyst with highly efficient hydrogenation performance based on the surface functionalization. Graphical Abstract
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SEPARATION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.2
Yan Yan,Qi Wang,Zeyang Xiang,Yanzhao Yang
A reasonable project was presented for the extraction and separation of Pt(IV), Pd(II), Ru(III), and Rh(III) from the mixed imidazolium-based ionic liquids (ILs) [C6mim]Cl, [C6mim][NTf2], and [C6mim][DDTC]. Pt(IV) was first separated from other three platinum group metals with a mixture of [C6mim]Cl and [C6mim][NTf2]. Then, separation of Pd(II) and Ru(III) from Rh(III) was realized by changing the concentration of [C6mim][DDTC]. Back-extraction of Pt(IV), Pd(II), and Ru(III) from loaded hydrophobic phase and the recovery of Rh(III) in aqueous phase were also investigated. Mechanisms between Pd(II)/Ru(III) and [C6mim][DDTC] were further explored using ultraviolet spectrophotometry (UV-Vis), infrared spectrophotometry (FTIR), the method of continuous variations, ab initio quantum chemical studies, and X-ray crystallographic analysis. The results afford more directions for extracting and separating metals by introducing devisable functionalized group into ILs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Sai Lian,Zhiyong Huang,Zhengzhong Lin,Xi Chen,Munetaka Oyama,Xiaomei Chen
In this work, a novel and highly selective molecularly imprinted sensor for the detection of melamine in milk using electrochemiluminescence (ECL) is reported. The preparation was carried out by modification of a glassy carbon electrode with a composite of silica nanoparticles doped with [Ru(bpy) 3 ] 2+ (RUDS) and molecularly imprinted polymer (MIP). The keys of the sensor were to employ RUDS as an ECL luminophore to prevent [Ru(bpy) 3 ] 2+ leaching from the modified electrode and MIP as a material for selective recognition. Taking advantage of the MIP pre-concentration effect, melamine could be extracted from the solution and detected by the resulting ECL signal enhancement of [Ru(bpy) 3 ] 2+ . Under optimized conditions, the relative ECL signal was proportional to the logarithm of melamine concentration in the range of 1 × 10 −12 –1 × 10 −7 mol L −1 , with a detection limit as low as 5 × 10 −13 mol L −1 . Compared with the RUDS/non-imprinted polymer, the RUDS/MIP modified electrode displayed high recognition ability, good reproducibility, and stability. To verify its reliability, the fabricated ECL sensor was used for determining the concentration of melamine in milk.
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Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 47
·18354-18365
·
IF 8.262
Lin Han,Pengfei Wang,Hui Liu,Qiangqiang Tan,Jun Yang
Tailoring the internal structure and chemical composition of nanomaterials is an effective way to enhance their performance for a given application. Herein, we report a general wet-chemistry approach to produce copper (Cu)-based binary hollow nanostructures with well defined architectures and investigate their catalytic properties in electrochemical reactions. This strategy relies on the galvanic replacement between Cu seeds and noble metal precursors including ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and platinum (Pt) in oleylamine at an appropriate temperature, which is essential to balance the reduction kinetics of the noble metal precursors by oleylamine during their galvanic replacement with Cu seed particles. Typically, the bimetallic CuPt hollow nanostructures with polyhedral morphologies exhibit enhanced catalytic properties for the oxygen reduction reaction (ORR), while their spherical counterparts obtained at a relatively low temperature show high activity for the methanol oxidation reaction (MOR). In particular, we will also demonstrate a unique application of the CuRu hollow nanostructures in supercapacitors after converting them into binary metal oxides at elevated temperatures in air.
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JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Jingbo Yang,Hongwei Mi,Shan Luo,Yongliang Li,Peixin Zhang,Libo Deng,Lingna Sun,Xiangzhong Ren
Flexible Li-O 2 batteries have attracted worldwide research interests and been considered to be potential alternatives for the next-generation flexible devices. Nitrogen-doped carbon nanofibers (N-CNFs) prepared by electrospinning are used as flexible substrate and an amorphous TiO 2 layer is coated by atomic layer deposition (ALD) and then decorated with Ru nanoparticles . The Ru/N-CNFs@TiO 2 composite is directly used as a free-standing electrode for Li-O 2 batteries and the electrode delivers a high specific capacity, improved round-trip efficiency and good cycling ability. The superior electrochemical performance can be attributed to the amorphous TiO 2 protecting layer and superior catalytic activity of Ru nanoparticles. Based on density functional theory (DFT) calculations from first principles, the carbon electrode after coating with TiO 2 is more stable during discharge/charge process. The analysis of Li 2 O 2 on three different interfaces (Li 2 O 2 /N-CNFs, Li 2 O 2 /TiO 2 , and Li 2 O 2 /Ru) indicates that the electron transport capacity was higher on Ru and TiO 2 compared with N-CNFs, therefore, Li 2 O 2 could be formed and decomposed more easily on the Ru/N-CNFs@TiO 2 cathode. This work paves a way to develop the free-standing cathode materials for the future development of high-performance flexible energy storage systems .
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