Intrachain Electron and Energy Transfer in Conjugated Organometallic Oligomers and Polymers

✍ Scribed by Shawkat Mohammed Aly; Cheuk-Lam Ho; Daniel Fortin; Wai-Yeung Wong; Alaa S. Abd-El-Aziz; Pierre D. Harvey

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 907 KB
• Volume: 14
• Category: Article
• ISSN: 0947-6539
• DOI: 10.1002/chem.200800304

✦ Synopsis

Abstract

The synthesis of polymers of the type (‐Cz‐CC‐PtL~2~‐CC‐Cz‐X‐)~n~ along with the corresponding model compounds (Ph‐PtL′~2~‐CC‐Cz)~2~‐X‐, where Cz=3,3′‐carbazole, X=nothing, Cz, or F (2,2′‐fluorene), L=PBu~3~, and L′=PEt~3~ are reported. The electronic spectra (absorption, excitation, emission, and ns‐transient spectra) and the photophysics of these species in 2‐methyltetrahyrofuran (2MeTHF) at 298 and 77 K are presented. Evidence for singlet electron and triplet energy transfer from the Cz chromophore to the F moiety are provided and discussed in detail. The rate for electron transfer is very fast (>4×10^11^ s^−1^), whereas that for triplet–triplet energy transfer is much slower (≈10^3^ s^−1^). This work represents a very rare example of studies that address electronic communication in the backbone of a conjugated organometallic polymer.