T-structures on derived categories of coherents heaves are an important tool to encode both representation-theoretic and geometric information. Unfortunately there are only a limited amount of tools available for the constructions of sucht-structures. We show how certain geometric/categorical quantum affine algebra actions naturally in duce t-structures on the categories under lying the action. In particular were cover the categories of exotics heaves of Bezrukavnikov and Mirkovi ́c. This is joint work with Sabin Cautis.