72057-26-2Relevant academic research and scientific papers
Reducing lifetime in Cu(i) complexes with thermally activated delayed fluorescence and phosphorescence promoted by chalcogenolate-diimine ligands
Bechtold, Ivan H.,Bortoluzzi, Adailton J.,Cazati, Thiago,Curcio, Sergio F.,De Souza, Bernardo,Dos Santos, Paloma L.,Farias, Giliandro,Heying, Renata S.,Monkman, Andrew P.,Salla, Cristian A. M.
, p. 14595 - 14604 (2020)
Luminescent copper(i) complexes have drawn attention due to their promising performance as alternative optoelectronic materials to the well-known heavy transition metal complexes. Herein, we report the synthesis of six luminescent Cu(i) complexes with phosphines and 1,10-phenanthroline-derived ligands with thiadiazole and selenodiazole groups in order to evaluate the effect of the heavy atom on their photophysical properties. Steady-state and time-resolved spectroscopy confirmed delayed fluorescence emission via a thermally activated delayed fluorescence mechanism in all cases. The experimental spectroscopic data were analyzed with detailed quantum-chemical calculations. Interestingly, these complexes did not show the expected heavy atom effect that enhances the spin-orbit coupling matrix elements, but nevertheless the addition of the heavier chalcogens contributed to reducing the photoluminescence lifetime to roughly 800 ns, which is the lowest reported so far for such TADF materials. This journal is
Synthesis and study on a series of phosphorescent Cu(I) complexes having sterically blocking ligands
Zhang, Kai,Zhang, Dong
, p. 341 - 348 (2014)
In this paper, we report six phosphorescent Cu(I) complexes with 1,10-phenanthroline-derived ligands and phosphorous ligands, including their synthesis, crystal structures, photophysical properties, and electronic nature. The Cu(I) center has a distorted tetrahedral geometry within the Cu(I) complexes. Theoretical calculation reveals that all emissions originate from triplet metal-to-ligand-charge-transfer excited state. It is found that the introduction of alkyl moieties into 2,9-positions of 1,10-phenanthroline is highly effective on restricting the geometric relaxation that occurs in excited states, which greatly enhances the photoluminescence (PL) performances, including PL quantum yield improvement, PL decay lifetime increase, and emission blue shift.
