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Highly luminescent terpyridinyl-ethynyl functionalized dithieno[3,2-b:2',3'-d]phospholes: synthesis, properties and complexation behavior.

Authors
Type
Published Article
Journal
Dalton Transactions
1477-9234
Publisher
The Royal Society of Chemistry
Publication Date
Volume
39
Issue
5
Pages
1250–1260
Identifiers
DOI: 10.1039/b919718d
PMID: 20104351
Source
Medline
License
Unknown

Abstract

The synthesis and advanced characterization, as well as the complexation behavior of a series of terpyridinyl-ethynyl substituted dithieno[3,2-b:2',3'-d]phospholes is reported. The functionalization of the dithienophosphole core furnishes the system with suitable ligand properties for a variety of transition metal centers (Zn(2+), Ru(2+), Pt(2+)) to form the corresponding complexes. The terpyridinyl-extended ligand systems show pronounced photoluminescence features that are beneficial for the formation of strongly luminescent transition metal complexes potentially to be employed in organic light emitting electrochemical cells. Theoretical calculations support the strong luminescence of the ligands resulting from pi-pi* transitions involving the extended pi-conjugated scaffold. The ligands were found to exhibit remarkable luminescence stability towards protonation, whereas complexation to transition metals shows distinct changes in the photophysical properties that depend of the nature of the transition metal employed.

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