Blackhawks general manager Stan Bowman said he first talked to Chayka about acquiring Duclair about a year ago but they couldn't agree on a trade. Talks picked up again over the last week or so.
"He's sort of a player that embodies what the NHL is all about now in terms of his speed and his ability to put the puck in the net," Bowman said. "I really like the way he skates. He brings the ability to be a really electrifying player. You have to give him some time; he's coming to a new team, so we'll be patient with him. But that element of speed and youth is something that was really important to us."
Panik, 26, who signed a two-year contract with the Blackhawks on May 11, has 16 points (six goals, 10 assists) in 37 games. He had 44 points (22 goals, 22 assists) with Chicago last season.
He was a healthy scratch for five games this season, and his goal against the Ottawa Senators on Tuesday was his first since Oct. 21, when he scored against the Coyotes.
"I think I had a really good training camp and I started pretty good and then I had a slump," Panik said. "It took a longer time than I expected to get out of it, and that's what I think cost me the job there.
"The plan for me is just to play my game. I think lately, the last few games, I've played really good. Just stay on that road and bring it every night and help them win a few games. That's where my main focus is."