OCR Text |
Show COLLEGE OF SCIENCE UNDERGRADUATE RESEARCH ABSTRACTS TUNABLE PHOTOPHYSICAL PROPERTIES OF PLATINUM-BASED SUPRAMOLECULAR COORDINATION COMPLEXES. Greg Schneider (Peter J. Stang) Department of Chemistry University of Utah A large number of reports on supramolecular coordination complexes (SCCs) have been published in the past couple of decades with each year seeing structures with increased structural complexity. SCCs have been proposed for a wide-range of applications, and in the Stang lab SCCs are typically constructed from bis(phosphine) Pt(ll) metal nodes. These Pt(ll)-based SCCs have been synthesized for the purpose of being utilized in bio-medical and imaging devices. However, little research has been performed to understand the photophysical properties of these systems which is critical for the advancement of bis(phosphine) Pt(ll) SCCs into devices for those proposed applications. Recently, a novel Pt(ll)-based SCC was synthesized in the Stang lab that utilized an endohedral amine-functionalized dipyridyl-based ligand, 2,6-bis(pyrid-4-ylethynyl) aniline, that displays unique optical properties upon complexation with Pt(ll). This system has a low-energy excited-state in the visible region of the electromagnetic spectrum and emits above 500 nm.To better understand this system a series of bis(phosphine) Pt(ll) SCCs were synthesized. The resultant systems have displayed facile tunability which is highly advantageous for photon-emitting devices. For example, by functionaliz-ing the pyridyl-based ligand para to the endohedral amine with electron donating and withdrawing groups, SCCs with wavelengths ranging from 475 to 573 n m can be readily synthesized. Peter J. Stang • |