Hart more than made up for the technical and introduced himself to Illinois with 14 points, five of them in an early second-half run that gave the Boilermakers a lead they rode to an 84-78 victory."Our guy obviously made a mistake and he wasn't in the score book,'" Purdue coach Matt Painter said. "It cost us two points. It's a pretty good trade out."
JaJuan Johnson led Purdue with 24 points.
The win ended a three-game losing streak for Purdue (15-3, 3-3) and kept the Boilermakers in the thick of a crowded Big Ten, in a fifth-place tie with Ohio State and Minnesota.
The loss dropped Illinois (12-7) to 4-2 in the conference and two games behind Big Ten leaders Michigan State.
Demetri McCamey led the Illini with a game-high 28 points, including 13 from the free-throw line. But he missed six free throws, and the Illini were 17 of 29 (58.6 percent) from the line.
"Demetri played a heck of a ball game," Illinois coach Bruce Weber said. "It's just the free throws."
After trailing 32-28 at the half, Purdue opened the second half with a 15-4 run.
Hart keyed the run, first with a fast break layup that tied the score at 32, then with a 3-pointer that gave the Boilermakers a 35-32 lead.
"We had no energy to start the second half," Weber said. "It's baffling."
The game started to slip away from the Illini even before halftime, though.
Purdue went cold from the field midway through the first half, failing to find the basket from the field for 7:01. But Illinois didn't do much with the opportunity.
The Illini led 16-12 at the start of that stretch, with 10:52 on the clock, and 26-20 when Moore broke the ice at 3:51.
In between Robbie Hummel and Johnson kept Purdue going with two free throws each.
But Illinois could only blame itself. The Illini were 4 for 12 from the field over those seven minutes, including 0 for 3 from three-point range.
Purdue then closed the gap to 28-26 on a jump shot by Hart with 53 seconds left in the half.
Only an unusual technical -- called when the officials noticed after Hart's first points that he didn't appear on the official roster
-- let Illinois widen its cushion. McCamey hit both free throws for a 30-26 lead and Illinois led 32-28 at the half.