Amines are the compounds and functional groups that contain a basic Nitrogen () atom with a lone pair.
The electron-donating group increases and the electron-withdrawing groups decrease the basicity of an amine.
Thus, the stronger the ability of an amine to donate the electron pair, the more basic it will be.
For examples:
To further comprehend it, when an electron-donating group, such as an alkyl group , is connected to an amine, it becomes more basic. In the other approach, when an electron-withdrawing group is attached, basic nature decreases. An alkyl-substituted amine, for example, is more basic than an aryl amine.