New molecularly engineered binuclear ruthenium(II) complexes for highly efficient near-infrared light-emitting electrochemical cells (NIR-LECs).
Babak Nemati BidehHashem ShahroosvandPublished in: Dalton transactions (Cambridge, England : 2003) (2022)
From the practical point of view, the stability, response time and efficiency of near-infrared light-emitting electrochemical cells (NIR-LECs) are key factors. By using the high potential of chemical modification potential of the phenanthroimidazole ligand, three new binuclear ruthenium(II) complexes with an alkyl spacer as the NIR-emitter were designed and synthesized. NIR-LECs based on these complexes exhibit near-infrared emission at the maximum wavelength of up to 705 nm and with an EQE of up to 0.72% at 4.0 V, which are among the highest values for NIR-LECs based on cationic binuclear ruthenium(II) complexes reported so far. The lifetimes of NIR-LECs based on binuclear complexes were increased about 1.5-to-4-fold with respect to the ones based on mononuclear complexes. Furthermore, a significant decrease in the turn-on time of NIR-LECs by chemical tethering of a new ionic methylpyridinium moiety from 6.3 to 1.4 minutes was observed. It seems that this combinational modification approach can open a new avenue for practical applications.
Keyphrases
- photodynamic therapy
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- fluorescent probe
- drug release
- fluorescence imaging
- highly efficient
- induced apoptosis
- living cells
- ionic liquid
- cell cycle arrest
- gold nanoparticles
- drug delivery
- cell death
- molecularly imprinted
- minimally invasive
- human health
- sensitive detection
- mass spectrometry
- endoplasmic reticulum stress
- climate change
- signaling pathway
- peripheral blood
- high resolution
- single molecule