What are the fields in which I should pursue PhD after masters in chemistry?

Spontaneous gold synthesis , or water to wine transition studies.

:-) That was hilarious!
Medicine? Ok, that's not a PhD, though you do get the two little letters before your name. I know someone who did a master's in chemistry and then went into medicine, seems like a good choice. (But then I'm doing humanities, so I wouldn't really know.) :-)

Politics....it owns all. Not sure that Chemistry is helpful though, maybe you could do a Masters in Politics and then move on from there. You really should have thought about this before.

Politics sounds perfect. Didn't Mrs T do a degree in chemistry? And she became prime minister. So with a masters in chemistry you might be able to aim even higher.

:-)