A pair of "pinwheel-like" metal free phthalocyanines, (D)-and (L)-1,8,15,22-tetrakis (2-isopropyl-5-methylcyclohexoxyl)phthalocyanine (1) were isolated for the first time from cyclic tetramerization of (D)-a...A pair of "pinwheel-like" metal free phthalocyanines, (D)-and (L)-1,8,15,22-tetrakis (2-isopropyl-5-methylcyclohexoxyl)phthalocyanine (1) were isolated for the first time from cyclic tetramerization of (D)-and (L)-3- (2-isopropyl-5-methylcyclohexoxyl)-1,2-dicyanobenzene (2), respectively, in refluxing npentanol in the presence of lithium pentanoate followed by treatment with acetic acid. Owing to the steric hindrance of the bulky menthol groups, C4 tetra-a-substituted phthalocyanine 1 is the main phthalocyanine product generated and then could be purified readily by column chromatography. The newly prepared phthalocyanine has been characterized by a series of spectroscopic technique including MALDI-TOF mass, NMR, electronic absorption and IR spectroscopy in addition to elemental analysis. In addition, their electrochemical properties have also been studied by cyclic voltammetry measurement.展开更多
为了提高RV减速器承载能力,对摆线针轮副基本参数进行了优化.在RV减速器体积标准化前提下,将基本参数偏心距和针齿半径作为设计变量,建立以提高承载能力为目标的优化模型;针对承载能力与基本参数关系无法用简单解析式表达的问题,通过对...为了提高RV减速器承载能力,对摆线针轮副基本参数进行了优化.在RV减速器体积标准化前提下,将基本参数偏心距和针齿半径作为设计变量,建立以提高承载能力为目标的优化模型;针对承载能力与基本参数关系无法用简单解析式表达的问题,通过对遗传算法适应度函数的改进,达到快速搜寻的目的.选择RV-20E减速器进行实例分析,数值仿真结果表明优化后其承载能力提升了11.15%;试制出优化后的摆线针轮副,完成了整机装配,并进行了承载能力实验.结果显示:优化后RV减速器在额定负载时传动效率提高了2.3%,温度和噪声分别降低了0.7℃和1 d B,且在重载时表现更佳.展开更多
基金supported by the National Natural Science Foundation of China(Nos. 41771342 and 21607096)Funds of Shandong "Double Tops" Program(No. SYL2017XTTD15)
文摘A pair of "pinwheel-like" metal free phthalocyanines, (D)-and (L)-1,8,15,22-tetrakis (2-isopropyl-5-methylcyclohexoxyl)phthalocyanine (1) were isolated for the first time from cyclic tetramerization of (D)-and (L)-3- (2-isopropyl-5-methylcyclohexoxyl)-1,2-dicyanobenzene (2), respectively, in refluxing npentanol in the presence of lithium pentanoate followed by treatment with acetic acid. Owing to the steric hindrance of the bulky menthol groups, C4 tetra-a-substituted phthalocyanine 1 is the main phthalocyanine product generated and then could be purified readily by column chromatography. The newly prepared phthalocyanine has been characterized by a series of spectroscopic technique including MALDI-TOF mass, NMR, electronic absorption and IR spectroscopy in addition to elemental analysis. In addition, their electrochemical properties have also been studied by cyclic voltammetry measurement.
文摘为了提高RV减速器承载能力,对摆线针轮副基本参数进行了优化.在RV减速器体积标准化前提下,将基本参数偏心距和针齿半径作为设计变量,建立以提高承载能力为目标的优化模型;针对承载能力与基本参数关系无法用简单解析式表达的问题,通过对遗传算法适应度函数的改进,达到快速搜寻的目的.选择RV-20E减速器进行实例分析,数值仿真结果表明优化后其承载能力提升了11.15%;试制出优化后的摆线针轮副,完成了整机装配,并进行了承载能力实验.结果显示:优化后RV减速器在额定负载时传动效率提高了2.3%,温度和噪声分别降低了0.7℃和1 d B,且在重载时表现更佳.