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1. Study on Synthesis and Electrochemical Performance of PMo-PDDA-GO Composite | |||
Ding Chao ,Gu Dawei,Lu Yi ,Xu Tianye ,Sun Hongshun,Li Jishu, Wang Lei,Shen Linjiang | |||
Chemistry 28 March 2017 | |||
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Abstract:A series of composites containing polyoxometalate (PMo), poly (diallyldimethylammonium chloride) (PDDA), and graphene oxide (GO) with different oxidation degrees were prepared in a two-step self-assembly process. The resulting polyoxometalate-poly (diallyldimethylammonium chloride)-graphene oxide (PPGx, x = 1 to 5) composites and their precursors (PDDA-GOx, x = 1 to 5) were analyzed with AFM, XRD, and FTIR spectroscopy. The self-assembly process was schematically summarized. The interspace distance between GO sheets in PPGx increased when the oxidation degree of GO increased. This increase in interspace distance was accompanied by a rapid decrease in the electrical conductivity of PPGx. At a sufficient high oxidation degree (x > 3), PDDA was completely inserted into the interspace of the laminated structure of the GO sheets in PPGx. The experimental results indicated that PDDA acted as a bridge, increasing electrostatic interaction between PMo anions and the GO sheets and causing many PMo anions to become anchored on the GO sheets. The electrochemical performances of the PPGx composites were greatly enhanced by the immobilization of PMo anions on GO sheets via PDDA, resulting in a much larger specific capacitance and a remarkably enhanced cycling stabilityIn this paper. | |||
TO cite this article:Ding Chao ,Gu Dawei,Lu Yi , et al. Study on Synthesis and Electrochemical Performance of PMo-PDDA-GO Composite[OL].[28 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4723025 |
2. Studies on thermal stability, dielectric and dynamic mechanical properties of functionalized kaolin reinforced epoxy composites | |||
Liu Xin,He Aixiao,Guo Jinshan | |||
Chemistry 02 March 2017 | |||
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Abstract: To improve the compatibility and dispersion stability of kaolin (K) in epoxy matrix, oligomeric epoxy was employed to modify K by a simple dry-method. After modification, epoxy resin was successfully grafted on the surface of K through chemical bonds, and the grafting rate was as high as 21.65 wt%. The contact angle of EP-K (101.28 ) was much higher than that of the pristine K (12.65 ). It was proved that the hydrophobic nature of organically modified K was improved significantly. Compared with the raw K, SEM demonstrated that the EP-K exhibited a homogeneous dispersion in organic solvent or in epoxy matrix. The EP-K /EP composites fabricated by solvent-free method possessed improved thermal stability and significant improvement on storage modulus. Due to the excellent insulation of K and the homogeneous dispersion, the dielectric constant of composites was lower than neat epoxy with the EP-K≤30 wt%. Compared with the non-modified K composite, the modification of K on permittivity of the composite was encouraged. However, all of the EP-K/EP composites still maintained a good insulating property. Hence the material developed in this work could be explored for a possible high performance and industrial application as microelectronic encapsulation material. | |||
TO cite this article:Liu Xin,He Aixiao,Guo Jinshan. Studies on thermal stability, dielectric and dynamic mechanical properties of functionalized kaolin reinforced epoxy composites[OL].[ 2 March 2017] http://en.paper.edu.cn/en_releasepaper/content/4720463 |
3. Three new complexes of Eu3+ ion with polydentate Schiff base ligands: Synthesis, crystal structure, and luminescence properties | |||
QIN Jin,NI Chanchan,GAO Xusheng | |||
Chemistry 24 February 2017 | |||
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Abstract:Three europium complexes, Eu(DAPABH)2Cl3 (1), Eu(DAPMBH)2(NO3)3.2H2O (2) and Eu(DAPBSH)(DMSO)2NO3(OH)2 (3) have been synthesized and characterized by various spectroscopic techniques, where DAPABH=2,6-diacetylpyridine-bis(4-aminobenzoyhydrazone), DAPMBH=2,6-diacetylpyridine-bis(4-methoxybenzoyhydrazone), DAPBSH=2,6-diacetylpyridine-bis(benzenesulfonyldrazide). The crystal structure of 1 and 3 were established via single crystal X-ray crystallography. The Eu3+ ion is ten-coordinated with six N-atoms and four O-atoms from two pentadentate DAPABH ligands to form a bicapped tetragonal antiprism geometry in 1, while the nine-coordinate Eu3+ ion is bound to two oxygen atoms of the nitrate counter ion, three N-atoms and two O-atoms of a pentadentate DAPBSH ligands as well as to two oxygen atoms of two disorder dimethyl sulfoxide molecules with a bicapped tetragonal antiprism coordination environment in 3. We have exploited their photo-physical abilities through fluorescence excitation spectrum and fluorescence emission spectrum both in solid state and solution state. | |||
TO cite this article:QIN Jin,NI Chanchan,GAO Xusheng. Three new complexes of Eu3+ ion with polydentate Schiff base ligands: Synthesis, crystal structure, and luminescence properties[OL].[24 February 2017] http://en.paper.edu.cn/en_releasepaper/content/4719278 |
4. Effect of photocatalysis on Fischer-Tropsch synthesis activity and selectivity of the TiO2 nanotube supported Co Catalyst | |||
WANG Limin,WANG Liqing,ZHANG Yichi,SU Haiquan | |||
Chemistry 21 December 2016 | |||
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Abstract:To explore a method with high activity and selectivity,is the key to improve Fischer-Tropsch synthesis(FTS) technology and the main focus in academic field. Herein,a photocatalytic route was employed into traditional thermochemical FTS,constituting a photothermocatalytic system.The 20%Co/TiO2 nanotube catalyst was prepared by the incipient wetness impregnation method, and applied to phtothermocatalytic process to investigate the role of illumination for the FTS reaction.The introduction of light dramatically improved CO conversion, from 9.18% to 63.92%.In addition,illumination gave rise to an increase in light paraffin selectivity.The present work demonstrates that photothermocatalysis could be a promising research direction on enhancing FTS catalytic performance and adjusting product distribution . | |||
TO cite this article:WANG Limin,WANG Liqing,ZHANG Yichi, et al. Effect of photocatalysis on Fischer-Tropsch synthesis activity and selectivity of the TiO2 nanotube supported Co Catalyst[OL].[21 December 2016] http://en.paper.edu.cn/en_releasepaper/content/4714367 |
5. The Synthesis of Novel Quinolinone Derivatives Containing 1,2,3-Triazole Unit Through Ultrasonic Irradiation Promoted 1,3-Dipolar Cycloaddition | |||
BI Wenzhu,MA Huili,LIU Shuyun,ZHU Shaohua,WEI Qiuren,CHEN Xiaolan,ZHAO Yufen | |||
Chemistry 18 November 2016 | |||
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Abstract:An efficient ultrasonic irradiation promoted copper(I)-catalyzed azide-alkyne 1,3-dipolar cycloaddition was used for the synthesis of quinolinone derivatives linked with 1,2,3-triazole moiety. The efficiency of 1,3-dipolar cycloaddition were notably promoted through the introduction of ultrasound irradiation. A wide variety of applicable quinolinone derivatives containing 1,2,3-triazole unit were synthesized at room temperature in high yields and their structures were elucidated by 1H NMR, 13C NMR, IR and HRMS. | |||
TO cite this article:BI Wenzhu,MA Huili,LIU Shuyun, et al. The Synthesis of Novel Quinolinone Derivatives Containing 1,2,3-Triazole Unit Through Ultrasonic Irradiation Promoted 1,3-Dipolar Cycloaddition[OL].[18 November 2016] http://en.paper.edu.cn/en_releasepaper/content/4710029 |
6. A sensitive PEC immunoassay based silicon phthalocyanine-decorated TiO2 mesocrystal | |||
Zheng Hongli,Wang Huixia,LI Yilin,Chen Sihong,Dai Hong | |||
Chemistry 31 October 2016 | |||
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Abstract:Herein, a new photoelectrochemical sensor for a?atoxin B1 (AFB1) detection was established based on the all-carbon nanohybrids as transducer scaffold accompanied with quasi-octahedral TiO2 mesocrystal (QOTM) absorbed dentritic Si phthalocyanines (SiPcs) as the efficient bioprobe. Specifically, The dentritic SiPcs sensitized QOTM presented better photocurrent response and stability in comparison with QOTM alone due to impressive light-harvesting capability of the dentritic SiPcs. The all-carbon nanocomposites exhibited fine photoelectric properties due to the photo-generated electrons of carbon quantum dots , which evidently expedited the electron transport, and the nanohybrids were first employed as affinity support to anchor AFB1 antibody.Under light irradiation, the photo-induced electrons of SiPcs migrated to the QOTM, and successively transferred to carbon quantum dots as electron relay mediator then via carbon nanohorns to the electrode surface . In this competitive immunosensor, the AFB1 standards compete with the labeled AFB1, leading to photocurrent decreased with the increasing target concentration in a wide linear range of 10-6-102 ng/mL. The newly developed methodology provided a versatile approach for ultrasensitive detection of small molecules. | |||
TO cite this article:Zheng Hongli,Wang Huixia,LI Yilin, et al. A sensitive PEC immunoassay based silicon phthalocyanine-decorated TiO2 mesocrystal[OL].[31 October 2016] http://en.paper.edu.cn/en_releasepaper/content/4706749 |
7. Porous N-Doped Carbon Prepared From Triazine-Based Polypyrrole Network: An Highly Efficient Metal-Free Catalyst for Oxygen Reduction Reaction in Alkaline Media | |||
YANG Mei,LIU Yijiang,LIU Bei,YANG Duanguang,CHEN Hongbiao,LI Huaming | |||
Chemistry 04 August 2016 | |||
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Abstract:Metal-free N-doped carbon (NC) materials have been considered as one of the most promising catalysts for the oxygen reduction reaction (ORR) in alkaline media owing to their high ORR catalytic activity, long-term stability, and excellent methanol tolerance. So far only a few examples of such catalysts have been prepared from triazine-based polymeric networks. Herein, we report the synthesis of such NC catalyst by directly pyrolyzing a nitrogen-rich, triazine-based polypyrrole network (TPN). The TPN is fabricated by oxidative polymerization of 2,4,6-tripyrrol-1,3,5-triazine monomer in the presence of TfOH using benzoyl peroxide as the oxidizing agent. Compared to commercial Pt/C catalyst, the as-prepared NC-900 (pyrolyzed at 900 C) catalyst exhibits superior ORR activity in alkaline electrolytes with a high onset potential of 0.972 V (vs. RHE), a large kinetic-limiting current density of 15.83 mA cm?2, and excellent methanol tolerance and durability. The results obtained are significant for the development of novel NC catalysts for alkaline fuel cells. | |||
TO cite this article:YANG Mei,LIU Yijiang,LIU Bei, et al. Porous N-Doped Carbon Prepared From Triazine-Based Polypyrrole Network: An Highly Efficient Metal-Free Catalyst for Oxygen Reduction Reaction in Alkaline Media[OL].[ 4 August 2016] http://en.paper.edu.cn/en_releasepaper/content/4700837 |
8. Total Synthesis of Mangiferin, Homomangiferin, and Neomangiferin | |||
WEI Xiong,LIANG Danlin,WANG Qing,MENG Xiangbao,LI Zhongjun | |||
Chemistry 26 July 2016 | |||
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Abstract:Total synthesis of mangiferin, homomangiferin, and neomangiferin, three C-glycosyl xanthone natural products with a wide spectrum of pharmacological effects, have been achieved starting from 2,3,4,6-tetra-O-benzyl-glucopyranose. The key steps involve a stereoselective Lewis acid promoted C-glycosylation of protected phloroglucinol with tetrabenzylglucopyranosyl acetate and a highly regioselective base-induced cyclization for the construction of the core xanthone skeleton. | |||
TO cite this article:WEI Xiong,LIANG Danlin,WANG Qing, et al. Total Synthesis of Mangiferin, Homomangiferin, and Neomangiferin[J]. |
9. Aerobic Oxidative Approach to pyrrolo[1,2-a]quinoxalines | |||
LI Yun,WANG Chao,ZHAI Hongbin | |||
Chemistry 13 July 2016 | |||
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Abstract:We have developed an environmentally benign and practical protocol for the synthesis of pyrrolo[1,2-a]quinoxalines, which represent ubiquitous structural units common to a number of biologically active compounds. This synthetic system features simple operation and using clean oxidant, as well as mild reaction conditions. Both aromatic and aliphatic aldehydes can be used for the reaction and the products were obtained in good to excellent yields. | |||
TO cite this article:LI Yun,WANG Chao,ZHAI Hongbin. Aerobic Oxidative Approach to pyrrolo[1,2-a]quinoxalines[J]. |
10. Newborn 2D materials for flexible energy conversion and storage | |||
LIU Jinxin,CAO Hui,JIANG Bei,XUE Yinghui,FU Lei | |||
Chemistry 14 June 2016 | |||
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Abstract:Newborn two-dimensional materials (NB2DMs) beyond graphene such as transition metal dichalcogenides (TMDs) exhibited excellent optoelectronic and mechanical properties as well as high theoretical specific capacity, which make them become the promising building blocks of flexible energy devices related to energy conversion and storage. Compared to graphene with zero band gap or traditional friable materials such as Si, these NB2DMs are more suitable to construct flexible devices as active layers of optoelectronic devices or as active materials for batteries. The presented review focuses on the recent advances in bendable energy devices based on NB2DMs, including batteries, supercapacitors (SCs), solar cells, photodetectors and nanoerators (NGs). The NB2DMs pave a new way to construct next-generation flexible energy devices with improved performance and we believe that those devices will be seen in our daily life and change our lifestyle in the immediate future. | |||
TO cite this article:LIU Jinxin,CAO Hui,JIANG Bei, et al. Newborn 2D materials for flexible energy conversion and storage[OL].[14 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4697002 |
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