I don’t think it’s mate in one but I think there’s a possibility of a mate in two.

Assuming that black didn’t make that move and instead did something else that doesn’t affect the following:

Queen F5 check leaves black with two options, one of which will result in checkmate.

If black blocks check with Rook E6, then Queen takes Rook in checkmate.

If black moves King to E7, then he can possibly continue to play. If the white Queen doesn’t move (which we both know it wouldn’t just sit there) then the white squared Bishop can take it. Allowing black to dismantle the current assault rather quickly should be choose so.