位置选择性合成 regioselective synthesis
The enzymatic performances of the imprinted polymers were evaluated by catalyzing the nitration reaction of toluene. The effect of type of solvent and functional monomers, as well as degree of cross-linking on the regioselectivity of nitration reaction, has been studied.
将分子印迹聚合物作为甲苯硝化反应体系的催化剂,探讨功能单体种类、致孔剂的种类、交联度以及反应温度等对甲苯硝化反应位置选择性的影响。
参考来源 - 分子印迹聚合物的合成及其仿生催化性能的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
用前线分子轨道（FMO）理论可以说明上述反应的区域选择性与位置选择性。
The regioselectivity and site selectivity of above cycloadditions can be elucidated by FMO theory.
一定条件下该硝化剂具有较好的反应位置选择性，这一是由于反应介质低的介电常数，二是多孔载体也具有明显的作用。
In this system good regioselectivity can be achieved mainly because of the existence of a porous support and the low dielectric constant of the reaction media.
你一定看到过选择性使用颜色的例子：一个艺术家拍完了照片，将所有颜色去掉，只保留焦点位置的颜色。
Almost assuredly, you’ve seen the use of selective chromacity: an artist will take a photo and remove color from everything except the area of focus.
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