摘要：The rational design of efficient single-atomic(SA)catalysts is essential and highly desirable but impeded by the lack of sufficient acknowledge between structure and *** this end,it is critical to clarify the effect of the coordination structure of active metal centers on the catalytic activities for the design of such ***,we report that different coordination structures of SA Pt catalysts can dramatically influence their activities for anti-Markovnikov hydroboration of *** with the other two coordination structures(Pt-N4 and Pt-O2),the SA Pt species coordinated with three O atoms(Pt-O3)display the highest turnover number value of 3288 for the hydroboration reaction to access the important alkylboronic *** functional theory calculations reveal that a superior catalytic activity can be expected for alkene hydroboration over the three O coordinated Pt species due to the lowest reaction energy(ΔG)limiting step from the reaction phase diagram.

摘要：运用三因素二次回归正交旋转组合设计的试验方法,进行钼肥对玉米、大豆间作体系总产量影响的研究。结果表明,施钼量和玉米密度,施钼量和带型配置都有一定的互作效应;当玉米密度、带型配置适当时施入钼肥均能增加产量,即在玉米、大豆间作体系中加入钼肥能有效地提高间作总产量。在试验条件下,当玉米密度为43642株·hm-2、玉米与大豆带型配置为2∶2、大豆钼酸铵施用量为3750g·hm-2时,间作总产量可达到8347 5kg·hm-2。