CaltechAUTHORS
  A Caltech Library Service

Synthetic control of excited states: New ancillary ligands for cyclometalated Ir(III) complexes

Li, Jian and Djurovich, Peter I. and Alleyne, Bert D. and Yousufuddin, Muhammed and Ho, Nam and Thomas, J. Christopher and Peters, Jonas C. and Bau, Robert and Thompson, Mark E. (2004) Synthetic control of excited states: New ancillary ligands for cyclometalated Ir(III) complexes. Abstracts of Papers of the American Chemical Society, 227 . INOR 385. ISSN 0065-7727 . https://resolver.caltech.edu/CaltechAUTHORS:20140728-134929197

Full text is not posted in this repository.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140728-134929197

Abstract

Due to the strong spin-orbit coupling of Ir atom, many cyclometalated Ir complexes are phosphorescent at room temperature, making these materials leading candidates for dopant emitters in OLEO applications. One method of modifying emission energies of Ir phosphors is to change the nature of cyclometalating ligand. This presentation will describe a new method of tuning the lowest excited state energy by employing high triplet energy ancillary ligands for Ir phosphors. Using different ancillary ligands, i.e., a family of pyrazolyl ligands and their analogues, and the same cyclometalating ligand, paratolylpyridine (tpy), it is possible to vary the emission color of Ir phosphors over a wide range. Electrochemical analysis shows that different ancillary ligands modify the emission energy by affecting the energy of HOMO while leaving the LUMO relatively unchanged. Meanwhile, the Ir complexes appear to have longer luminescence lifetime and slower radiative decay when their emission energies increase above some level.


Item Type:Article
ORCID:
AuthorORCID
Peters, Jonas C.0000-0002-6610-4414
Additional Information:© 2004 American Chemical Society.
Record Number:CaltechAUTHORS:20140728-134929197
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140728-134929197
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47528
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:28 Jul 2014 21:06
Last Modified:03 Oct 2019 06:54

Repository Staff Only: item control page