No, the first time Qo'nos (or, in TUC, "Kronos") was mentioned was in the 1991 release of the film. In earlier TNG outings, we heard "Kling" or the generic "The Klingon Homeworld" or...even worse...the "Commander, set course for the First City of the Klingon Imperial Empire" line from Picard.
I could have sworn it was used in "Redemption"...