It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯負(fù)載金雞納堿金屬絡(luò)合物的合成與表征及其不對(duì)稱催化性能研究本章分為兩節(jié)日本人男女乱伦发生性关系视频。，以辛可寧和奎寧及聚-4-氨甲基苯乙烯為原料a黄大片久久网，合成了4種聚-4-氨甲基苯乙烯負(fù)載金雞納堿絡(luò)合物催化劑亚洲精选无码精品，并對(duì)它們的結(jié)構(gòu)用元素分析AV无码一级A片在线播放免费、X-射線光電子能譜、TG/DTA等幾種測試手段進(jìn)行了表征农村人性爱一区二区；首次將所合成的手性高分子負(fù)載的金屬絡(luò)合物用于催化芳香酮不對(duì)稱還原反應(yīng)AV乱网站，詳細(xì)研究了所得的手性高分子負(fù)載的金屬絡(luò)合物對(duì)不同底物的催化性能，用HPLC等分析手段定量檢測了還原過程的底物轉(zhuǎn)化率及其產(chǎn)物對(duì)映異構(gòu)體選擇性在线国产91小视频，并考察了反應(yīng)時(shí)間欧美丝袜A∨在线一区二区三区、反應(yīng)溫度、催化劑和底物投料比鲁一鲁性爱视频播放、反應(yīng)溶劑和循環(huán)次數(shù)對(duì)催化性能的影響加勒比官网中文在线。

Study of Optimization DesignThis paper programs three Command Batch Files that can respectively perform optimization designs of 4-point-supported-glass, 6-point-supported-glass and the specially designed 6-point-supported-glass.

這三段命令流可供熟悉ANSYS操作的工程設(shè)計(jì)人員使用。

Our results reveal that with the same number of cobalt atoms and the same cobalt-substrate interation stength, the melting points and pre-melting intervals of the two kinds of supported Co clusters are all in reasonable agreement with each other. With increasing the depth of supported potential, the melting points increase for the supported cluster. Similar to the case of free clusters, the linear relation between the melting point and the inverse of cluster's size cube root is also found for the two kinds of supported clusters.

結(jié)果表明：對(duì)于給定原子數(shù)目的支撐Co團(tuán)簇免费亚洲爱爱视频，在襯底勢強(qiáng)度相同時(shí)国产麻豆综合在线视频，兩種襯底勢下對(duì)支撐團(tuán)簇熔點(diǎn)及預(yù)熔化區(qū)間給出了一致的描述；隨襯底勢強(qiáng)度增加韩国日本国产欧美一区二区，支撐團(tuán)簇熔點(diǎn)升高国产乱人视频在线观看ktv，且兩種襯底勢所描述的支撐Co團(tuán)簇也類同于自由Co團(tuán)簇都表現(xiàn)出較好的熔點(diǎn)與尺寸依賴的線性關(guān)系。

New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene PolymerizationFacile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that:1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

本工作的新貢獻(xiàn)如下：(1)啪啪啪啪网址、球形氯化鎂負(fù)載后過渡金屬催化荊催化乙烯聚合本文將配合物2久久无码免费的A毛片大全，3-雙(2，6-二異丙基苯亞胺)丁烷二溴化鎳(1)和配合物2欧美AA级三级片，6-二[1-(2在线观看所有免费AV网站，4，6-三甲基苯亞胺)乙基]吡啶二氯化鐵(2)分別直接負(fù)載于經(jīng)不同熱脫醇溫度處理的球形氯化鎂載體上成人福利影院免费观看网站，研究了氯化鎂載體的脫醇溫度對(duì)負(fù)載化后過渡金屬催化劑及其聚合物的影響www.sw23s.com，研究表明：1、通過對(duì)球形MgCl_2·2.56C_2H_5OH載體進(jìn)行熱脫醇處理国产精品久久永二区二区，可以獲得合適機(jī)械強(qiáng)度一区二区综合、較高比表面積和較高孔隙度的球形氯化鎂載體欧美一级片免费网；2、BETjizzjzz中国，XRD国产污视频在线免费看，IR，SEM一本大道无码av一二三区，GPC和DSC研究表明看A一级欧美黄色录像，脫醇溫度極大地影響負(fù)載后過渡金屬催化劑的活性和聚合物的性能。

New contributions of this work are as follows:(1). Preparation of Spherical MgCl_2-Supported Late-Transition Metal Catalysts for Ethylene Polymerization Facile and effective immobilization of late-transition metal catalysts. 2,3-bis-(2,6-diisopropylphenyl) butane diimine nickel dibromide (1) and 2,6-bis-[1-(2,4,6-trimethylphenylimino)ethyl]pyridine iron dichloride (2), for ethylene polymerization has been achieved, using spherical MgCl_2 supports obtained by thermal dealcoholization of MgCl_2·2.56C_2H_5OH, and the effects of dealcoholization temperature on supported late-transition metal catalysts and the properties of resultant polymers were studied, the results indicated that: 1.Supports with appropriate mechanical strength, high surface area and high porosity could be prepared by thermal dealcoholization of spherical MgCl_2·2.56C_2H_5OH supports; 2.BET, XRD, IR, SEM, GPC and DSC analyses indicate that the activities of the supported late-transition metal catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature.

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Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

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Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area; 2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support; 3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier; 4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling; 5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene Polymerization In this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that: 1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS; 2.co-mlling time had no obvious effect on the texture of support after 12 hours; 3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

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Three kinds of ionic liquid were used to support the acetylacetone at the C3 position directly according to the method indicated above. These synthesized ionic liquid supported acetylacetone catalysts include imidazolium salts ionic liquid supported acetylacetone catalysts, pyridinium salts ionic liquid supported acetylacetone catalysts and ammonium salts ionic liquid supported acetylacetone catalysts. All these catalysts were characterized by ~1H-NMR,~(13)C-NMR, IR and elementary analysis.

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With the development of modern communication networks and computer application technology, more and more attentions are paid to the CSCW (Computer Supported Cooperative Work) study field, which orients to multi-user cooperation.

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New box design with durable 0.5 inch (13 mm) paving skin Vertically-adjusting mold mount for precise leveling of mold to machine Telescoping end sections with 12 inches (305 mm) of width variation on each side are available Standard paving depth is zero to 24 inches (610 mm)Edge slump adjustment Hydraulic Vertical Hinged Sideplates, self-contained inside the mold for track clearance Split, pressure-compensated sideplates Folding side plate wings for transporting without removing Pivoting mold mounting beam to eliminate stress points Self-supported TA is hydraulically driven with 3.5 inch (89 mm) ACME screws for up to a six inch (152 mm) crown Front and rear top T-bar on mold for attaching accessories and structural integrity Inserts are bolted together with front and rear alignment pins for easy mold assembly New vibrator mounting tube attaches to T-bar on mold – Vertical vibrator lift – Rear lubrication system with grease zerks accessible from the work bridge New strike-off – Mounted on paver frame T-rail, independent of the mold – New modular design with wedge lock system for ease in changing widths – 10 inches (254 mm) of hydraulic height adjustment – Hydraulic crown adjustment Spreader plow mounted to paver frame T-rail, optional auger available Tamper bar optional

與耐久性的新的箱子設(shè)計(jì)鋪精密水準(zhǔn)測量的0.5英寸(13 mm)皮膚垂直調(diào)整的模子登上模子用機(jī)器制造擠撞與12英寸(305 mm)的末端部分在每邊的寬度變異是可利用的標(biāo)準(zhǔn)鋪的深度是零對(duì)24英寸(610 mm)邊緣暴跌調(diào)整水力垂直的取決于的Sideplates，獨(dú)立性在軌道清除分裂的模子里面，折疊運(yùn)輸?shù)膒ressure-compensated sideplates旁邊板材翼沒有去除在軸上旋轉(zhuǎn)的模子架置射線消滅重音點(diǎn)Self-supported TA水力駕駛與3.5英寸(89 mm)由六英寸(152 mm)冠決定的尖端螺絲在前后冠上在模子的T酒吧附有的輔助部件并且結(jié)構(gòu)正直插入物與容易的模子匯編新的振蕩器架置管隨員T酒吧的定位銷一起在前后被閂上在模子–垂直的振蕩器推力與油膏zerks的–后方潤滑系統(tǒng)容易接近從新工作的橋梁觸擊–在攤鋪機(jī)框架足跡未满18搞黄色网站在线视频免费看，模子的獨(dú)立登上了與楔子鎖系統(tǒng)的–新的模塊設(shè)計(jì)在改變的寬度的舒適的– 10英寸(254 mm)水力高低調(diào)整–水力冠調(diào)整分布器犁登上了對(duì)攤鋪機(jī)框架足跡九九线精品视频，任意任意木鉆可利用的堵塞器的酒吧