The Boilermakers led for nearly the entire game and appeared to be in control of the contest with a 60-51 lead with 6 1/2 minutes to go, but just when the Buckeyes looked like they needed a flawless performance to pull out a victory, they turned in just that.
Perfect on the offensive end, at least.
They scored on all of their last 10 possessions of the game, including a three-pointer by Brittany Johnson with .7 seconds on the clock that turned a one-point deficit into a two-point win.
The Buckeyes made only three defensive stops along the way, including an interception of the final desperation pass by the Boilermakers before time expired, but prevailed thanks to often trading three for two.
In outscoring the Boilermakers 23-12 down the stretch, the Buckeyes made five three-pointers - four by Johnson - and gave up none.
Jantel Lavender led Ohio State with 23 points and nine rebounds. The senior forward and three-time Big Ten Player of the Year also found Johnson open in the corner for the game-winning shot after Purdue chose to double-team her.
Ohio State overcame being outscored 26-13 at the free throw line and outrebounded 38-29 in front of 9,943 fans at Mackey Arena and a national television audience on ESPN2.
With the win, the Buckeyes (17-9, 8-6) moved into a tie with Iowa for fifth place in the Big Ten while the Boilermakers (18-10, 8-7) slipped a half-game behind them.
The top five teams in the final standings receive a bye in the conference tournament.