... 分配色谱法：partition chromatography 供电子取代基：electron donating group 红外分光光度法：infrared spectrophotometry ...
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... electron beam regulator 释义：电子束调节器 electron donating group 释义：给电子基团,推电子基团 electron exchange resin 释义：电子交换树脂 ...
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donating electron group 推电子基团
Moreover, We found that the relaxation time of H2TPP with donating electron group is about 7 times faster than that with withdrawing electron group.
另外，还发现推电子基团取代的卟啉弛豫过程比吸电子基团取代的卟啉弛豫过程快7倍。
The dinitrobenzene with electron-withdrawing group can be hydrogenated much easier than the dinitrobenzene with electron-donating group.
含有吸电子基团的二硝基苯类化合物反应活性明显高于含有供电子基的二硝基化合物的加氢反应；
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