Air Traffic Control Fully Certified
Situational Awareness; Distraction
ATC Issue All Types; Airspace Violation All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic
Airspace Structure; Human Factors; Procedure
Aircraft X was direct WUVON descending to 4;000 to intercept the final approach course to eventually get the field in sight and cleared for a visual approach. Aircraft Y was about 5 miles in trail direct FRNNY going slightly faster than Aircraft X. As Aircraft X was approaching the final; I observed that there was an unidentified VFR aircraft at their 11 o'clock northeast bound climbing out of 3;300 feet. I instructed Aircraft X to amend their altitude to 4;500 for traffic. VFR traffic and Aircraft X were going to merge so I turned Aircraft X to go behind the traffic. This in turn caused Aircraft X at 4;500 to cross the path of Aircraft Y who was level at 5;000.In the process of recovering separation between Aircraft X and Aircraft Y; Aircraft X descending to 5;000 may have penetrated Niles airspace. Aircraft X was turned to a heading of 340 to continue their descent and away from Niles airspace.I should have just turned Aircraft X northbound; climbed and possibly resequenced them when the VFR target further became a factor. With Aircraft Y 5SM in trail and keeping his speed at a higher velocity; it would have been the easiest option.
A TRACON Controller reported vectoring an aircraft off their approach to avoid unidentified VFR traffic lost required spacing with the arriving in trail traffic.