No, there isn't a branch of chemistry specifically named after oxygen. While oxygen is a critical element in many areas of chemistry, it's not the focus of a dedicated field of study the way some other elements are.

For example, you have:

* Organic Chemistry: Focuses on carbon-containing compounds.

* Inorganic Chemistry: Studies non-organic compounds.

* Biochemistry: Explores the chemistry of living organisms.

Oxygen is crucial in many of these fields (like in oxidation reactions and respiration), but it's not a central theme or organizing principle for any specific branch of chemistry.