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Ca2+ cation-mediated microenvironment for electrochemical hydrodimerization of furfural

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Science China chemistry 2025年

作者： Wei Du Shuangshuang cha Can Lei Mengxin Qu Zhongqiang Deng Ming Gong Xinhe Bao department of chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University State Key Laboratory of Catalysis National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences

Furfural is one of the most important biomass-based platform molecules as sustainable precursors for chemicals and fuels. The electrochemical hydrodimerization of furfural can generate hydrofuroin, which is a promising precursor for gasoline or jet ***, steering the selectivity toward hydrodimerization under near-neutral conditions that suppress polymerization and disproportionation of furfural remains challenging. Herein, we discovered that tuning the electrolyte cations could be an effective and alternative strategy for modulating furfural reduction to the traditional electrocatalyst design. Under the optimal Ca2+cations,hydrofuroin yield could be much improved from other cations with hydrofuroin selectivity of 95.5%. The systematic characterization of the ion-centered double layer reflected the suitable sizes and charges of hydrated Ca2+for suppressing the hydrogen evolution reaction from activation of surrounding water molecules as well as encouraging furfural accumulation via non-covalent interaction for directing the electron transfer to furfurals. Ions with smaller or larger sizes can either activate local water molecules or form a crowded ionic interface that casts an adverse effect on furfural enrichment. This work not only presents an effective strategy for facilitating biomass valorization via hydrodimerization but also emphasizes the essential role of the ion-centered microenvironment for steering the electrocatalytic pathways.

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Injectable bioorthogonal hydrogel (BIOGEL) accelerates tissue regeneration in degenerated intervertebral discs

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Bioactive Materials 2023年第5期23卷 551-562页

作者： Jeffrey Luo Anjani Darai Thanapat Pongkulapa Brian Conley Letao Yang Inbo Han Ki-Bum Lee department of chemistry and Chemical Biology RutgersThe State University of New JerseyPiscatawayNJ08854USA department of Neurosurgery CHA University School of MedicineCHA Bundang Medical Center59 Yaptap-roBundang-guSeongnam-siGyeonggi-do13496Republic of Korea

Intervertebral disc(IVD)degeneration is a leading cause of back pain and precursor to more severe conditions,including disc herniation and spinal *** traditional growth factor therapies(e.g.,TGFβ)are effective at transiently reversing degenerated disc by stimulation of matrix synthesis,it is increasingly accepted that bioscaffolds are required for sustained,complete IVD *** scaffolds(e.g.,metal/polymer composites,non-mammalian biopolymers)can be improved in one or more IVD regeneration demands:biodegradability,noninvasive injection,recapitulated healthy IVD biomechanics,predictable crosslinking,and matrix repair *** meet these demands,tetrazine-norbornene bioorthogonal ligation was combined with gelatin to create an injectable bioorthogonal hydrogel(BIOGEL).The liquid hydrogel precursors remain free-flowing across a wide range of temperatures and crosslink into a robust hydrogel after 5-10 min,allowing a human operator to easily inject the therapeutic constructs into degenerated ***,BIOGEL encapsulation of TGFβpotentiated histological repair(e.g.,tissue architecture and matrix synthesis)and functional recovery(e.g.,high water retention by promoting the matrix synthesis and reduced pain)in an in vivo rat IVD degeneration/nucleotomy *** BIOGEL procedure readily integrates into existing nucleotomy procedures,indicating that clinical adoption should proceed with minimal *** bioorthogonal crosslinking is essentially non-reactive towards biomolecules,our developed material platform can be extended to other payloads and degenerative injuries.

关键词： Bioorthogonal chemistry Growth factor Injectable hydrogel Intervertebral disc degeneration Tissue engineering

Electrochemical Probe of Hydroxylation of 4-Nitro-phenol by Cytochrome C with Hydrogen Peroxide

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Chemical Research in Chinese Universities 1998年第2期14卷 45-51页

作者： ZHU Yi-min WANG Jin-cheng LI Jing-hong DONG Shao-jun BU Feng-quan Laboratory of Electroanalytical chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 Norma n Bethune Univer sity of Medica l Science Cha ngchun130023

BU Fengquan(Norman Bethune University of Medical Science, changchun, 130023)(Received Dec. 2, 1996) The reaction of hydrogen peroxide with cytochrome c makes them coupled to lead to the hydroxylation of 4-nitrophenol. In situ electrochemical probe was used to detect the hydroxylation of 4-nitrophenol, which can avoid the tedious extraction procedure, the loss of the active species and the interference of some colored substances in the detection of 4-nitrocatechol by spectroscopic method. The hydroxyl radical scavengers mannitol and sodium benzoate did not eliminate hydroxylation, but the inhibitory effect of uric acid on the hydroxylation lead to the formation of the ferryl species of the protein during the reaction. These studies suggest that the electrochemical probe might efficiently detect the trace 4-nitrocatechol from the onset of the hydroxylation reaction and thus provides a more sensitive tool.

关键词： Hydrogen peroxide Hydroxylation of 4-nitrophenol Cytochrome c

Crystal Structure of Adduct 2-Phenyl-imidazo[4,5-f] 1,10-phenanthroline Methanol

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Chinese Journal of chemistry 2003年第8期21卷 1054-1058页

作者：林惠文朱文祥 department of chemistry Hainan Normal University department of chemistry Beijing Normal University

absractThe structure of the title adduct comprises a phenanthroline derivative 2 phenyl imidazo[4,5 f ] 1,10 phenanthroline and a methanol. The composition of the crystalline adduct was cha^racterized as C 19 H 12 N 4·CH 3OH. It belongs to orthorhombic system, space group Pna 2 1 with a =1 3693(4) nm, b = 2 2988(7) nm, c =0 51338(15) nm, V =1 6160(8) nm 3, Z =4, and final R 1=0 0423, wR 2=0 1012. Crystal structure shows that all the 19 carbon atoms and 4 nitrogen atoms are coplanar. The bond length data indicated that a very extensive conjugation system was formed. This conjugation makes the compound being a potentially excellent energy transformer used for luminescent materials.

关键词： phenanthroline derivative crystalline adduct crystal structure 2 phenyl imidazo[4,5 f ] 1,10 phenanthroline

Analysis of volatile oil in Rhizoma Ligustici Chuanxiong-Radix Paeoniae Rubra by gas chromatography-mass spectrometry and chemometric resolution

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Acta Pharmacologica Sinica 2006年第4期27卷 491-498页

作者： Xiao-ru LI Yi-zeng LIANG~2 Fang-qiu GUO College of chemistry and Chemical Engineering,Research Center of Modernization of Traditional Chinese Medicines,Central South University,changsha 410083.China CollegeofchemistryandChemicalEngineering ResearchCenterofModernizationofTraditionalChineseMedicinesCentralSouthUniversityCha

Aim:To analyze the volatile chemical components of the herbal pair RhizomaLigustici Chuanxiong-Radix Paeoniae Rubra(RLC-RPR)and compare them withthose of each of the herbs ***:Gas chromatography-mass spectrom-etry(GC-MS),a chemometric resolution technique using the heuristic evolvinglatent projections(HELP)method,and the overall volume integration methodwere ***:In total,52,38,and 61 volatile chemical components in RLC,RPR,and RLC-RPR essential oils were determined,respectively,accounting for95.14%,95.19%,and 89.68% of the total contents of essential oil of RLC,RPR,andRLC-RPR,*** main volatile chemical components werebutyldienephthalide(20.65%)and ligustilide(50.15%)for RLC;and n-hexadecanoicacid(20.18%),[Z,Z]9,12-octadecadienoic acid(30.11%),2-hydroxy-benzaldehyde(17.08%)for RPR,and butyldienephthalide(14.80%),and ligustilide(38.91%)*** main volatile chemical components of RLC-RPR were almost thesame as those of RLC,but the relative amounts were ***:Thenumber of volatile chemical components in RLC-RPR was almost equal to the sumof the number in the 2 constituent herbs,but the relative amounts were ***,an acid-base reaction takes place during the process of decoctingthe *** data gathered in this study may be helpful for understanding thesynergistic nature of this herb pair in traditional Chinese medicine.

关键词： herbal pair Rhizoma Ligustici Chuanxiong-Radix Paeoniae Rubra essential oil gas chromatography-mass spectrometry chemometric resolution method

Effects of structure and electronic properties of D-π-A organic dyes on photovoltaic performance of dye-sensitized solar cells

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Journal of Energy chemistry 2021年第3期30卷 208-216页

作者： Min-Woo Lee Jae-Yup Kim Hyung-Geun Lee Hyun Gil cha Duck-Hyung Lee Min Jae Ko Bio-Based chemistry Research Center Advanced Convergent Chemistry DivisionKorea Research Institute of Chemical Technology(KRICT)Ulsan 44429Republic of Korea department of Chemical Engineering Dankook UniversityYongin 16890Republic of Korea department of chemistry Sogang UniversitySeoul 04107Republic of Korea department of Chemical Engineering Hanyang UniversitySeoul 04763Republic of Korea Institute of Nano Science and Technology Hanyang UniversitySeoul 04763Republic of Korea

Herein,we examine the performance of dye-sensitized solar cells containing five D-π-A organic dyes designed by systematic modification of π-bridge size and geometric *** dye has a simple push-pull structure with a triarylamino group as an electron donor,bithiophene-4,4-dimethyl-4 H-cyclopenta 1,2-b:5,4-b’]dithiophene(M11),4,4-dimethyl-4 H-cyclopenta[1,2-b:5,4-b’]dithiophenethiophene(M12),thiophene-4,4-dimethyl-4 H-cyclopenta[1,2-b:5,4-b’]dithiophene(M13),4,4-dimethyl-4 H-cyclopenta[1,2-b:5,4-b’]dithiophene-benzene(M14),and 4,4-dimethyl-4 H-cyclopenta[1,2-b:5,4-b’]dithiophene(M15)units asπ-bridges,and cyanoacrylic acid as an electron acceptor/*** extension of theπ-bridge linkage favors wide-range absorption but,because of the concomitant molecular volume increase,hinders the efficient adsorption of dyes on the TiO_(2) film ***,higher loadings are achieved for smaller dye molecules,resulting in(i)a shift of the TiO_(2) conduction band edge to more negative values,(ii)a greater photocurrent,and(iii)suppressed charge recombination between the photoanode and the redox couple in the ***,under one-sun equivalent illumination(AM 1.5 G,100 mW/cm^(2)),the highest photovoltage,photocurrent,and conversion efficiency(η=7.19%)are observed for M15,which has the smallest molecular volume among M series dyes.

关键词： Dye-sensitized solar cells Donor-acceptor dyes Electron-rich unit Wide-range absorption Impedance spectroscopy

Synthesis and characterization of a New 2D Ca(Ⅱ) Coordination Polymer Containing 1D Calcium-oxygen chains

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Chinese Journal of Structural chemistry 2014年第7期33卷 1069-1073页

作者：王记江唐龙侯向阳高楼军付峰张美丽 department of chemistry and Chemical Engineering Shaanxi Key Laboratory of Chemical Reaction EngineeringYan’an University

A new 2D Ca（II） coordination polymer, [Ca（H2btc）（H20）2]n （1, H4btc = biphenyl- 3,3＇,5,5＇-tetracarboxylic acid）, has been synthesized using the hydrothermal method and cha- racterized by single-crystal X-ray diffraction, elemental analysis, IR, thermogravimetric analysis, and photoluminescent analysis. Complex 1 crystallizes in the monoclinic system, space group C2/c with a = 17.5676（15）, b = 11.4496（8）, c = 7.6197（8） A,β= 102.787（2）°, V= 1494.6（2） A3, Z = 4, Dc = 1.797 Mg·m-3,μ= 0.483 mm-1, F（000） = 832, the final R = 0.0348 and wR = 0.0915 for 1521 observed reflections with I 〉 2a（I）. Complex 1 has a 2D network containing 1D calcium-oxygen chains. These 2D networks are further connected by O-H……O hydrogen bonding interactions to generate a 3D supramolecular structure.

关键词： coordination polymer calcium-oxygen chains photoluminescent property

Voltammetric determination of venlafaxine as an antidepressant drug employing Gd_2O_3 nanoparticles graphite screen printed electrode

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Journal of Rare Earths 2019年第3期37卷 322-328页

作者： Hadi Beitollahi Shohreh Jahani Somayeh Tajik Mohammad Reza Ganjali Farnoush Faridbod Taher Alizadeh Environment department Institute of Science and High Technology and Environmental Sciences Graduate University of Advanced Technology NanoBioElectrochemistry Research Center Bam University of Medical Sciences Center of Excellence in Electrochemistry School of Chemistry College of Science University of Tehran Biosensor Research Center Endocrinology & Metabolism Molecular-Cellular Sciences Institute Tehran University of Medical Sciences department of Analytical chemistry Faculty of Chemistry College of Science University of Tehran

Graphite screen printed electrode modified with Gd_2 O_3 nanoparticles(Gd_2 O_3/SPE) was developed for the determination of venlafaxine(VF). The Gd_2 O_3 nanoparticles were thoroughly characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM) and X-ray diffraction(XRD) analyses. To study the electrochemical behaviour of venlafaxine cyclic voltammetry(CV), chronoamperometry(cha)and differential pulse voltammetry(DPV) were employed. These studies reveal that the oxidation of venlafaxine is facilitated at Gd_2 O_3/SPE. After optimization of analytical conditions, analysis of venlafaxine using the modified electrode in 0.1 mol/L PBS(pH 7.0) demonstrates that the peak currents corresponding to venlafaxine vary linearly with its concentration in the range of 5.0 ×10^(-6)-9.0 × 10^(-4) mol/L. The detection limit(S/N = 3) of 2.1 × 10^(-7) mol/L is obtained for venlafaxine using DPV. The prepared modified electrode benefits from advantages such as simple preparation method, high sensitivity and low detection ***, the evaluation of practical applicability of this proposed method is successful in the identification of venlafaxine in pharmaceutical formulations, urine and water samples.

关键词： Venlafaxine Gd2O3 nanoparticles Electrochemical techniques Screen printed electrode Rare earths

Highly effective H_(2)/D_(2)separation in a stable Cu-based metalorganic framework

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Nano Research 2021年第2期14卷 518-525页

作者： Yanan Si Xiang He Jie Jiang Zhiming Duan Wenjing Wang Daqiang Yuan State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China department of chemistry College of SciencesShanghai UniversityShanghai 200444China University of the Chinese Academy of Sciences Beijing 100049China

A three-dimensional copper metal-organic framework with the rare chabazite(cha)topology namely FJI-Y11 has been constructed with flexibly carboxylic ligand 5,5'-[(1,4-phenylenebis(methylene))bis(oxy)]diisophthalic acid(H_(4)L).FJI-Y11 exhibits high water stability with the pH range from 2 to 12 at temperature as high as 373 ***,FJI-Y11 also shows high efficiency of hydrogen isotope separation using dynamic column breakthrough experiments under atmospheric pressure at 77 *** to its excellent structural stability,FJI-Y11 possesses good regenerated performance and maintains high separation efficiency after three cycles of breakthrough experiments.

关键词： metal-organic framework(MOFs) hydrogen isotope separation breakthrough experiments