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Reaching strong absorption up to 700 nm with new benzo[ g ]quinoxaline-based heteroleptic copper( i ) complexes for light-harvesting applications
- Source :
- Dalton Transactions
- Publication Year :
- 2023
- Publisher :
- Royal Society of Chemistry (RSC), 2023.
-
Abstract
- Heteroleptic copper(I) complexes, with a diimine as a chromophoric unit and a bulky diphosphine as an ancillary ligand, have the advantage of a reduced pseudo Jahn–Teller effect in their excited state over the corresponding homoleptic bis(diimine) complexes. Nevertheless, their lowest absorption lies generally between 350 to 500 nm. Aiming at a strong absorption in the visible by stable heteroleptic Cu(I) complexes, we designed a novel diimine based on 4-(benzo[g]quinoxal-2′-yl)-1,2,3-triazole derivatives. The large π-conjugation of the benzoquinoxaline moiety shifted bathochromically the absorption with regard to other diimine-based Cu(I) complexes. Adding another Cu(I) core broadened the absorption and extended it to considerably longer wavelengths. Moreover, by fine-tuning the structure of the dichelating ligand, we achieved a panchromatic absorption up to 700 nm with a high molar extinction coefficient of 8000 M$^{-1}$ cm$^{-1}$ at maximum (λ = 570 nm), making this compound attractive for light-harvesting antennae.
- Subjects :
- Chemistry & allied sciences
ddc:540
Subjects
Details
- Language :
- English
- ISSN :
- 14779226, 03009246, 13645447, 14727773, and 14779234
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi.dedup.....4b7935baa84975743d06c9f400c7957e
- Full Text :
- https://doi.org/10.5445/ir/1000159125