Abstract
We report the first observation of conformational modulation of the efficiency of luminescence of a chelating phosphine containing a saturated backbone and combined with [Ru(bpy) 2] 2+. The observed luminescent lifetimes are very long: 910(20) ns in CD 3CN and 794(20) ns in CH 3CN at 298 K. The bimetallic structure of rac-(ΔΔ/ΛΛ)-[Ru 2(dppcb)(bpy) 4](PF 6) 4 ( 1) and meso-(ΔΛ/ΛΔ)-[Ru 2(dppcb)(bpy) 4](PF 6) 4 ( 2), where dppcb is cis, trans, cis-1,2,3,4-tetrakis(diphenylphosphino)cyclobutane, is responsible for this dramatic effect. An enhanced folding of the cyclobutane rings drastically reduces the efficiency of luminescence as observed in the new monometallic complexes [Ru(dppcb)(bpy) 2](PF 6) 2 ( 3) and [Ru(dppcbO 2)(bpy) 2](PF 6) 2 ( 4), where dppcbO 2 is cis, trans, cis-1,2-bis(diphenylphosphinoyl)-3,4-bis(diphenylphosphino)cyclobutane.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
