Synthesis and Luminescence Behavior of Rhenium(I) Triynyl Complexes. X-ray Crystal Structures of [Re(CO)₃(^tBu₂bpy)(C⋮C−C⋮C−C⋮CPh)] and [Re(CO)₃(Me₂bpy)(C⋮C−C⋮C−C⋮CSiMe₃)]

Abstract

Luminescent rhenium(I) triynyl complexes [Re(CO) 3 ( t Bu 2 bpy)(C⋮C−C⋮C−C⋮CPh)] 1, [Re(CO) 3 ( t Bu 2 bpy)(C⋮C−C⋮C−C⋮CSiMe 3 )] 2, and [Re(CO) 3 (Me 2 bpy)(C⋮C−C⋮C C⋮CSiMe 3 )] 3, were synthesized and their photophysical and electrochemical properties studied. The X-ray crystal structures of 1 and 3 have also been determined. A comparison study of their emission properties to that of their mono- and diynyl analogues was made and their emission origin suggested and supported by EHMO studies.