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  1. Article ; Online: Reactivity and Selectivity of the Diels-Alder Reaction of Anthracene in [Pd

    Mao, Xin-Rui / Wang, Qian / Zhuo, Shu-Ping / Xu, Li-Ping

    Inorganic chemistry

    2023  Volume 62, Issue 10, Page(s) 4330–4340

    Abstract: The field of supramolecular metal-organic cage catalysis has grown rapidly in recent years. However, theoretical studies regarding the reaction mechanism and reactivity and selectivity controlling factors for supramolecular catalysis are still ... ...

    Abstract The field of supramolecular metal-organic cage catalysis has grown rapidly in recent years. However, theoretical studies regarding the reaction mechanism and reactivity and selectivity controlling factors for supramolecular catalysis are still underdeveloped. Herein, we demonstrate a detailed density functional theory study on the mechanism, catalytic efficiency, and regioselectivity of the Diels-Alder reaction in bulk solution and within two [Pd
    Language English
    Publishing date 2023-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.3c00005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Cation Vacancies in Feroxyhyte Nanosheets toward Fast Kinetics in Lithium-Sulfur Batteries.

    Niu, Aimin / Mu, Jinglin / Zhou, Jin / Tang, Xiaonan / Zhuo, Shuping

    Nanomaterials (Basel, Switzerland)

    2023  Volume 13, Issue 5

    Abstract: Lithium-sulfur batteries have attracted extensive attention owing to their environmental friendliness, abundant reserves, high specific discharge capacity, and energy density. The shuttling effect and sluggish redox reactions confine the practical ... ...

    Abstract Lithium-sulfur batteries have attracted extensive attention owing to their environmental friendliness, abundant reserves, high specific discharge capacity, and energy density. The shuttling effect and sluggish redox reactions confine the practical application of Li-S batteries. Exploring the new catalyst activation principle plays a key role in restraining polysulfide shuttling and improving conversion kinetics. In this respect, vacancy defects have been demonstrated to enhance the polysulfide adsorption and catalytic ability. However, inducing active defects has been mostly created by anion vacancies. In this work, an advanced polysulfide immobilizer and catalytic accelerator is developed by proposing FeOOH nanosheets with rich Fe vacancies (FeVs). The work provides a new strategy for the rational design and facile fabrication of cation vacancies to improve the performance of Li-S batteries.
    Language English
    Publishing date 2023-02-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano13050909
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  3. Article ; Online: Green Catalytic Method for Hydrothiolation of Allylamines: An External Electric Field.

    Zhang, Mingxia / Li, Wenzuo / Zhou, Ziyan / Zhuo, Shuping / Su, Zhongmin

    ACS omega

    2022  Volume 7, Issue 7, Page(s) 5782–5790

    Abstract: Based on the idea of environmental friendliness, we first studied the hydrothiolation reactions of thiophenol with allylamine using a green catalyst-an external electric field (EEF). The hydrothiolation reactions could occur through Markovnikov addition ( ...

    Abstract Based on the idea of environmental friendliness, we first studied the hydrothiolation reactions of thiophenol with allylamine using a green catalyst-an external electric field (EEF). The hydrothiolation reactions could occur through Markovnikov addition (path M) and anti-Markovnikov addition (path AM) pathways. The calculation results demonstrated that when the EEF was oriented along
    Language English
    Publishing date 2022-02-11
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c05741
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  4. Article: Carbon and phosphorus co-doped carbon nitride hollow tube for improved photocatalytic hydrogen evolution

    Zhao, Shuo / Liu, Yuepeng / Wang, Yanyun / Fang, Jiasheng / Qi, Yiqiang / Zhou, Yuming / Bu, Xiaohai / Zhuo, Shuping

    Journal of colloid and interface science. 2022 June 15, v. 616

    2022  

    Abstract: Graphitic carbon nitride, regarded as a charming conjugated polymer, has been a visible light photocatalyst. Bulk carbon nitride endures the limited light absorption ability, few surface active sites and slow separation of photoinduced charge carriers, ... ...

    Abstract Graphitic carbon nitride, regarded as a charming conjugated polymer, has been a visible light photocatalyst. Bulk carbon nitride endures the limited light absorption ability, few surface active sites and slow separation of photoinduced charge carriers, leading to the poor catalytic activity. Herein, a new carbon (C) and phosphorus (P) co-doped carbon nitride hollow tube with adjustable optical property (CPCN) was developed by applying melamine and polyacrylic amide as the precursors and phosphoric acid as the P source via a hydrothermal-thermal copolymerization way. The effects of polyacrylic amide content on the morphology and photocatalytic performance were intensively investigated. The special hollow tube favors the improvement of active sites and visible light harvesting ability. Meantime, C and P co-doping results in the narrow band gap and rapid charge transfer, thus enabling an enhanced catalytic activity under visible light irradiation. Particularly, CPCN-50 exhibits a remarkable H₂ generation rate of 4485.7 μmol h⁻¹ g⁻¹ under λ > 400 nm, which is higher than pure carbon nitride CN (902.3 μmol h⁻¹ g⁻¹), C doped sample CCN-50 (3741.1 μmol h⁻¹ g⁻¹) and P doped sample CNP (2280.0 μmol h⁻¹ g⁻¹). It implies that C, P co-doping exhibits a synergistic effect on boosting photoinduced charge transfer and hindering the recombination. Moreover, CPCN-50 illustrates a higher H₂ generation rate (3024.5 μmol h⁻¹ g⁻¹) than CN (400.8 μmol h⁻¹ g⁻¹) under λ > 420 nm irradiation. This way developed in this work might exhibit utility for synthesizing highly effective photocatalysts for the CO₂ reduction, H₂ evolution and so on.
    Keywords absorption ; carbon dioxide ; carbon nitride ; copolymerization ; graphene ; hydrogen production ; irradiation ; light ; melamine ; phosphoric acid ; phosphorus ; photocatalysis ; photocatalysts ; polymers ; synergism
    Language English
    Dates of publication 2022-0615
    Size p. 152-162.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 241597-5
    ISSN 1095-7103 ; 0021-9797
    ISSN (online) 1095-7103
    ISSN 0021-9797
    DOI 10.1016/j.jcis.2022.02.057
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    In stock of ZB MED Bonn / Germany

    Z 71/707: Show issues

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  5. Article: Hollow tubular carbon doping graphitic carbon nitride with adjustable structure for highly enhanced photocatalytic hydrogen production

    Liu, Yuepeng / Zhao, Shuo / Zhang, Chao / Fang, Jiasheng / Xie, Liying / Zhou, Yuming / Zhuo, Shuping

    Carbon. 2021 Sept., v. 182

    2021  

    Abstract: Carbon nitride, considered to be a promising photocatalyst, still has much room to increase the catalytic performance owing to the slow charge transfer and limited light harvesting ability. Herein, carbon doping carbon nitride with hollow tubular ... ...

    Abstract Carbon nitride, considered to be a promising photocatalyst, still has much room to increase the catalytic performance owing to the slow charge transfer and limited light harvesting ability. Herein, carbon doping carbon nitride with hollow tubular structure was successfully developed by using melamine and sodium alginate as precursors via a simple hydrothermal calcination method. The effects of carbon content on the structure and photocatalytic activities of as-obtained carbon nitride were researched in detail. The hollow tubular structure can assist the enhancement of specific surface area, increase of visible light harvesting ability and enhancement of electron transport ability. Simultaneously, carbon doping can adjust the photoelectric performance and band structure of carbon nitride due to the generation of delocalized big π bonds to enhance the photocatalytic activities. The catalytic performance of as-obtained carbon nitride is estimated by hydrogen evolution reaction. And carbon doping carbon nitride with hollow tubular structure accounts for 3 times and 2 times promotion than pristine CN in hydrogen evolution rate under λ > 420 nm and λ > 400 nm, respectively. Especially, the sample CN-40 shows a highly enhanced hydrogen generation efficiency of 1210.3 μmol h-1 g-1, which should be inseparable from the function of carbon doping and hollow tubular structure.
    Keywords carbon nitride ; electron transfer ; graphene ; hydrogen production ; light ; melamine ; photocatalysis ; photocatalysts ; sodium alginate ; surface area
    Language English
    Dates of publication 2021-09
    Size p. 287-296.
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ISSN 0008-6223
    DOI 10.1016/j.carbon.2021.06.008
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  6. Article: Nickel-Embedded Carbon Materials Derived from Wheat Flour for Li-Ion Storage.

    Ding, Wen / Wu, Xiaozhong / Li, Yanyan / Wang, Shuo / Zhuo, Shuping

    Materials (Basel, Switzerland)

    2020  Volume 13, Issue 20

    Abstract: The biomass-based carbons anode materials have drawn significant attention because of admirable electrochemical performance on account of their nontoxicity and abundance resources. Herein, a novel type of nickel-embedded carbon material (nickel@carbon) ... ...

    Abstract The biomass-based carbons anode materials have drawn significant attention because of admirable electrochemical performance on account of their nontoxicity and abundance resources. Herein, a novel type of nickel-embedded carbon material (nickel@carbon) is prepared by carbonizing the dough which is synthesized by mixing wheat flour and nickel nitrate as anode material in lithium-ion batteries. In the course of the carbonization process, the wheat flour is employed as a carbon precursor, while the nickel nitrate is introduced as both a graphitization catalyst and a pore-forming agent. The in situ formed Ni nanoparticles play a crucial role in catalyzing graphitization and regulating the carbon nanocrystalline structure. Mainly owing to the graphite-like carbon microcrystalline structure and the microporosity structure, the NC-600 sample exhibits a favorable reversible capacity (700.8 mAh g
    Language English
    Publishing date 2020-10-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma13204611
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  7. Article ; Online: Mechanistic Study on Palladium-Catalyzed Regioselective Oxidative Amination: Roles of Ammonium Salts.

    Yang, Zhen-Hua / Wang, Qian / Zhuo, Shuping / Xu, Li-Ping

    The Journal of organic chemistry

    2020  Volume 85, Issue 11, Page(s) 6981–6991

    Abstract: Anti-Markovnikov selective oxidative amination reaction with simple alkenes is particularly promising but challenging because of the inherent electronic effect of the alkene substrate which is in favor of the Markovnikov product. In a recently reported ... ...

    Abstract Anti-Markovnikov selective oxidative amination reaction with simple alkenes is particularly promising but challenging because of the inherent electronic effect of the alkene substrate which is in favor of the Markovnikov product. In a recently reported Pd-catalyzed anti-Markovnikov oxidative amination reaction, the addition of quaternary ammonium salts is shown to be critical. We performed a comprehensive DFT study to elucidate the reaction mechanism and the origin of the regioselectivity, as well as the roles of the ammonium salts. Our results show that without and with the ammonium salts the reaction mechanisms are different. Detailed analyses indicate that the steric effects account for the switch of regioselectivity. The roles of the quaternary ammonium salts have been elucidated: (1) Me
    Language English
    Publishing date 2020-05-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.0c00296
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4473: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  8. Article ; Online: External electric field: a new catalytic strategy for the anti-Markovnikov hydrohydrazination of parent hydrazine.

    Zhang, Ming-Xia / Li, Wen-Zuo / Xu, Hong-Liang / Zhou, Zi-Yan / Zhuo, Shu-Ping

    RSC advances

    2021  Volume 11, Issue 19, Page(s) 11595–11605

    Abstract: The anti-Markovnikov hydroamination reaction is considered to be a particular challenge, and one of the reactants, parent hydrazine, is also regarded as a troubling reagent. In this study, we first studied the hydrohydrazination of parent ... ...

    Abstract The anti-Markovnikov hydroamination reaction is considered to be a particular challenge, and one of the reactants, parent hydrazine, is also regarded as a troubling reagent. In this study, we first studied the hydrohydrazination of parent hydrazine
    Language English
    Publishing date 2021-03-22
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra01037a
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  9. Article ; Online: Study and Comparison on Purification Methods of Multicolor Emission Carbon Dots.

    Zhou, Shengju / Sui, Ying / Zhu, Xiaotong / Sun, Xiaofeng / Zhuo, Shuping / Li, Hongguang

    Chemistry, an Asian journal

    2021  Volume 16, Issue 4, Page(s) 348–354

    Abstract: Recent years have witnessed a rapid development of carbon dots (CDs), due to their outstanding luminescence properties and excellent biocompatibility. However, the internal structure and photoluminescent (PL) mechanism of CDs are still the subject of ... ...

    Abstract Recent years have witnessed a rapid development of carbon dots (CDs), due to their outstanding luminescence properties and excellent biocompatibility. However, the internal structure and photoluminescent (PL) mechanism of CDs are still the subject of considerable debate, which is due to the fact that reaction products usually contain mixtures of several CD fractions as well as molecular intermediate and side products. Therefore, careful purification of the CDs is significant for analysis of structure and luminescence mechanism. Here, multicolor emission CDs were prepared by a one-pot pyrolysis of citric acid in formamide. Then, the precipitation method, dialysis and gel permeation chromatography (GPC) are successively employed to purify the multicolor emission CDs. This post-treatment allowed us to compare the optical properties of CDs obtained by different separation methods and provide a valuable guidance for the purification of CDs.
    Language English
    Publishing date 2021-01-26
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2233006-9
    ISSN 1861-471X ; 1861-4728
    ISSN (online) 1861-471X
    ISSN 1861-4728
    DOI 10.1002/asia.202001352
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  10. Article: Investigation on the role of different conductive polymers in supercapacitors based on a zinc sulfide/reduced graphene oxide/conductive polymer ternary composite electrode

    Xu, Zichen / Zhang, Zhiqiang / Yin, Huiling / Hou, Shengxian / Lin, Hongtao / Zhou, Jin / Zhuo, Shuping

    RSC advances. 2020 Jan. 17, v. 10, no. 6

    2020  

    Abstract: Conductive polymers, such as polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh) and poly 3,4-ethylenedioxythiophene (PEDOT), play an important role in the application of pseudocapacitors. It is necessary to explore the effects of different ... ...

    Abstract Conductive polymers, such as polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh) and poly 3,4-ethylenedioxythiophene (PEDOT), play an important role in the application of pseudocapacitors. It is necessary to explore the effects of different conductive polymers in electrode composites. Herein, we prepare zinc sulfide/reduced graphene oxide (ZnS/RGO) by the hydrothermal method, and conductive polymers (PANI, PPy, PTh and PEDOT) doped with the same mass ratio (polymer to 70 wt%) via in situ polymerization on the surface of ZnS/RGO composite. For the supercapacitor application, the ZnS/RGO/PANI ternary electrode composite possesses the best capacitance performance and cycle stability out of all of the polymer-coated ZnS/RGO composites. In the three-electrode system, the discharge specific capacitance and cycle stability of ZnS/RGO/PANI are 1045.3 F g⁻¹ and 160% at 1 A g⁻¹ after 1000 loops. In a two-electrode symmetric system, the discharge specific capacitance and cycle stability of ZnS/RGO/PANI are 722.0 F g⁻¹ and 76.1% at 1 A g⁻¹ after 1000 loops, and the greatest energy and power density of the ZnS/RGO/PANI electrode are 349.7 W h kg⁻¹ and 18.0 kW kg⁻¹. In addition, conductive polymers can effectively improve the voltage range of the electrode composites in 6 M KOH electrolyte for the two-electrode system. The discharge voltage ∼1.6 V makes them promising electrode materials for supercapacitors.
    Keywords capacitance ; electric potential difference ; electrochemical capacitors ; electrodes ; electrolytes ; graphene oxide ; hot water treatment ; polyaniline ; polymerization ; potassium hydroxide ; pyrroles ; zinc sulfide
    Language English
    Dates of publication 2020-0117
    Size p. 3122-3129.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c9ra07842h
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