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| 1 | Influence of chelate ring size on the properties of phosphine-sulfonate palladium catalysts显示文摘Phosphine-sulfonate based palladium is one of the most extensively studied catalyst systems in olefin polymerization.This type of catalyst features six-membered chelate ring size,and can enable the copolymerizations of ethylene with a wide variety of polar monomers.In this contribution,we decide to investigate the influence of chelate ring size on the properties of phosphinesulfonate palladium catalysts.As such,a series of phosphine-sulfonate ligands and the corresponding seven-membered ring Pd(II)complexes[κ~2-(P,O)-2-(CH_2-PR_1R_2)-4-methylphenyl-sulfonato]Pd(Me)(DMSO)(Pd1,R_1=R_2=Cy,Pd2,R_1=R_2=o-Me O-C_6H_4;Pd3,R_1=Ph,R_2=2-[2,6-(Me O)_2C_6H_3]C_6H_4;DMSO=dimethyl sulfoxide)were designed,prepared and characterized.These palladium complexes are moderately active when they were applied in ethylene polymerization and copolymerizations with methyl acrylate and butyl vinyl ether.However,their properties are greatly reduced from those of the classic six-membered ring phosphine-sulfonate palladium complex Pd2′.The experimental results indicate that the bigger chelate ring size can increase the ligand flexibility and damage the catalytic properties for the phosphine-sulfonate type palladium catalysts. | Chen Zou Wenmin Pang Changle Chen | 2018 | Science China Chemistry2018，61，9： | 3 |
| 2 | Positional Electronic Effects in Iminopyridine-N-oxide Nickel Catalyzed Ethylene Polymerization显示文摘A series of dibenzhydryl-based iminopyridine-N-oxide ligands bearing a range of electron-donating or-withdrawing substituents(OMe,H;and NO_(2))and corresponding nickel pre-catalysts are prepared and characterized.The substituents are installed at different positions on the ligand structure,including 4-position of the pyridine-N-oxide moiety(position X)and 4-position of the aniline moiety(position Y).These nickel pre-catalysts are highly active in ethylene polymerization with the addition of very little amount of aluminum cocatalysts,leading to the formation of polyethylenes with molecular weights of well above one million.Electron-donating substituents make the catalysts sensitive to polymerization temperature.In contrast,the catalysts bearing electron-withdrawing NO_(2) substituents show relatively steady performances at different temperatures.Most importantly,we demonstrate that different substituents and different positions both play important roles in determining the properties of nickel catalysts.This provides an alternative strategy for the future design of high-performance polymerization catalyst. | Mingjun Chi Ao Chen Wenmin Pang Chen Tan Changle Chen | 2021 | Chinese Journal of Chemistry2021，39，6： | 2 |
| 3 | Microbial pretreatment of corn stovers by solid-state cultivation of phanerochaetechrysosporium for biogas production显示文摘 | LIU Shan WU Shubiao PANG Changle | 2014 | Applied Biochemistry and Biotechnology2014，172，3： | 1 |
| 4 | Drying kinetics and quality of Monukka seedless grapes dried in an air-impingement jet dryer显示文摘 | Xiao Hongwei Pang Changle Wang Lihong | 2010 | Biosystems Engineering2010，105，2： | 1 |
| 5 | Py-GC/MS study of lignin pyrolysis and effect of catalysts on product distribution显示文摘Fast pyrolysis is one of the most promising methods to convert lignin into fuels and chemicals.In the present study,pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS)was used to evaluate vapor phase product distribution of lignin fast pyrolysis.During the non-catalytic pyrolysis process,lignin was pyrolyzed at 400℃,500℃ and 600℃ respectively,finding that the highest yield of aromatic hydrocarbons was obtained at 600℃.Catalytic pyrolysis experiments were also conducted to investigate the effects of catalyst pore structure and acidity on the product distributions.Five different catalysts(HZSM-5,MCM-41,TiO_(2),ZrO_(2) and Mg(Al)O)were applied to lignin catalytic pyrolysis,and the catalytic performance was estimated by analyzing the pyrolytic products.The catalysts were characterized by using X-ray diffraction(XRD),BET,and NH3(CO_(2))temperature programmed desorption.Based on these characterizations,discussion was carried out to explain the formation of the produc distributions.Among the five catalysts,HZSM-5 exhibited the best performance on the formation of aromatic hydrocarbons. | Si Zhan Wang Chenguang Bi Kang Zhang Xinghua Yu Chiling Dong Renjie Ma Longlong Pang Changle | 2017 | International Journal of Agricultural and Biological Engineering2017，10，5： | 1 |
| 6 | Drying kinetics and quality of Monukka Seedless grapes dried in an air-impingement jet dryer显示文摘 | Xiao Hongwei Pang Changle Wang Lihong | 2010 | Biosystems Engineering2010，105，2： | 1 |
| 7 | Drying kinetics and quality of Monukka Seedless grapes dried in an air-impingement jet dryer显示文摘 | Xiao Hongwei Pang Changle Wang Lihong | 2010 | Biosystems Engineering2010，105，2： | 1 |
| 8 | Drying kinetics and quality of Monukka Seedless grapes dried in an air-impingement jet dryer显示文摘 | Xiao Hongwei Pang Changle Wang Lihong | | 0，，02： | 1 |
| 9 | Drying kinetics and quality of 'Monukka' seedless grapes dried in an air-impingement jet dryer显示文摘 | XIAO Hongwei PANG Changle WANG Lihong | 2010 | Biosystems Engineering2010，105，2： | 1 |
| 10 | Drying kinetics and quality of Monukka seedless grapes dried in an air-impingement jet dryer显示文摘 | Xiao Hongwei Pang Changle Wang Lihong | 2010 | Biosystems Engineering2010，105，2： | 1 |
| 11 | Lewis acid/base modulation in β-diiminate zinc-catalyzed switchable ring-opening polymerization of rac-lactide显示文摘Two β-diiminate zinc complexes were prepared and found to show high activity and well-controlled catalytic behavior in the ring-opening polymerization of rac-lactide. Coordination of the Lewis acid to the zinc complexes completely terminated the polymerization. The coordinated Lewis acid was easily cleaved by using a Lewis base, so that the polymerization could resume.Thus, switchable polymerization could be realized by the subsequent addition of a Lewis acid and a Lewis base. This work provides a new strategy to control the ring-opening polymerization of rac-lactide. | Pan Zhang Minhui Zhao Wenmin Pang Changle Chen | 2019 | Science China Chemistry2019，62，4： | 1 |
| 12 | Vertical Schottky ultraviolet photodetector based on graphene and top–down fabricated GaN nanorod arrays显示文摘GaN has been widely used in the fabrication of ultraviolet photodetectors because of its outstanding properties.In this paper,we report a graphene–GaN nanorod heterostructure photodetector with fast photoresponse in the UV range.GaN nanorods were fabricated by a combination mode of dry etching and wet etching.Furthermore,a graphene–GaN nanorod heterostructure ultraviolet detector was fabricated and its photoelectric properties were measured.The device exhibits a fast photoresponse in the UV range.The rising time and falling time of the transient response were 13 and 8 ms,respectively.A high photovoltaic responsivity up to 13.9 A/W and external quantum efficiency up to 479%were realized at the UV range.The specific detectivity D*=1.44×10^(10) Jones was obtained at–1 V bias in ambient conditions.The spectral response was measured and the highest response was observed at the 360 nm band. | Xuemin Zhang Changling Yan Jinghang Yang Chao Pang Yunzhen Yue Chunhong Zeng Baoshun Zhang | 2022 | Journal of Semiconductors2022，43，6： | 0 |
| 13 | Practice Instruction of Innovative and Entrepreneurial Training Program for Aquatic Animal Medicine Students显示文摘As an important platform for the combination of theory and practice,college students' innovative and entrepreneurial training program has an important impact on improving the comprehensive ability of undergraduates. The major of aquatic animal medicine is a new sea-related major. The continuous development and transformation and upgrading of aquaculture in the new period have put forward newer and higher requirements for the innovative and practical ability and comprehensive quality of aquatic animal medicine graduates. Taking the innovation and entrepreneurship program of college students majoring in aquatic animal medicine as an example,this paper analyzes the significance of the innovation training program for college students,the cultivation of students' scientific research ability,and the problems existing in the application and operation of the program,in order to provide a reference for the innovative education and talent training for students majoring in aquatic animal medicine. | Huanying PANG Miao XIE Ziling WANG Xiuying YAN Huiling LIU Changling LI Jichang JIAN | 2019 | Asian Agricultural Research2019，11，4： | 0 |
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