Abstract
A new iridium(III) complex based on the triazole-pyridine ligand with tetrathiafulvalene unit, [Ir(ppy)2(L)]PF6 (1), has been synthesized and structurally characterized. The absorption spectra, luminescent spectra and electrochemical behaviors of L and 1 have been investigated. Complex 1 is found to be emissive at room temperature with maxima at 481 and 510 nm. The broad and structured emission bands are suggested a mixing of 3LC (3π-π*) and 3CT (3MLCT) excited states. The influence of iridium ion coordination on the redox properties of the TTF has also been investigated by cyclic voltammetry.
Highlights
For several decades, tetrathiafulvalene (TTF) and its derivatives were extensively developed by scientists in photofunctional materials[1,2,3,4,5,6,7,8] because of their strongly electron-donating and attractive reversible redox properties
We have reported a new nitrogen-containing TTF-based ligand, 2-(1-(2-((4',5'-bis(methylthio)[2,2'-bi(1,3-dithiolylidene)]-4-yl)thio)ethyl)-1H-1,2,3triazol-4-yl)pyridine (L)
We report the synthesis of a new bis-cyclometallated TTF-based iridium(III) complex with ppy as C∧N ligand, [Ir(ppy)2(L)]PF6 (1) (Scheme 1)
Summary
Tetrathiafulvalene (TTF) and its derivatives were extensively developed by scientists in photofunctional materials[1,2,3,4,5,6,7,8] because of their strongly electron-donating and attractive reversible redox properties. Coordination of TTF-containing ligands to transition metal centers is typically achieved by functionalizing TTF with nitrogen atom.[9]. We have reported a new nitrogen-containing TTF-based ligand, 2-(1-(2-((4',5'-bis(methylthio)[2,2'-bi(1,3-dithiolylidene)]-4-yl)thio)ethyl)-1H-1,2,3triazol-4-yl)pyridine (L). Niu et al.: New Iridium Complex Coordinated with Tetrathiafulvalene. Yridine N∧N ligand and binap/xantphos as diphosphines P∧P ligand to form two Cu(I) complexes, [Cu(I)(Binap) (L)]BF4 and [Cu(I)(Xantphos)(L)]BF4, which exhibited advantageous electrochemical and photophysical properties.[10] The results led us to further design other metal complexes based on the TTF-containing thioethylbridged triazole-pyridine ligand. We report the synthesis of a new bis-cyclometallated TTF-based iridium(III) complex with ppy as C∧N ligand, [Ir(ppy)2(L)]PF6 (1) (Scheme 1). Their electrochemical and photophysical properties are investigated
Sign-in/Register to view highlights & summary 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.
