396723-80-1Relevant articles and documents
Speeding-up Thermally Activated Delayed Fluorescence in Cu(I) Complexes Using Aminophosphine Ligands
Toigo, Jéssica,Farias, Giliandro,Salla, Cristian A. M.,Duarte, Luís Gustavo Teixeira Alves,Bortoluzzi, Adailton J.,Zambon Atvars, Teresa Dib,de Souza, Bernardo,Bechtold, Ivan H.
, p. 3177 - 3184 (2021)
Luminescent copper(I) complexes presenting thermally activated delayed fluorescence (TADF) have drawn attention as emitters for organic light emitting diodes (OLEDs). While the majority of ligands used have nitrogen as donor atoms, in this work, we report the synthesis and characterization of three copper(I) complexes with the diimine ligand 1,10-phenanthroline and aminophosphine-derived ligands containing the piperazine and N,N’-dimethylethylenediamine to evaluate their effect into the emission properties. The photophysical studies as a function of temperature suggested TADF and phosphorescence emission, supported by detailed density functional theory (DFT) calculations. The use of aminophosphine ligands enhance the TADF decay pathway in comparison with copper complex containing the usual POP ligand. These properties, combined with the appropriate HOMO-LUMO energy levels and thermal stability, make these compounds a promising alternative for application in OLEDs.
Heteroleptic Copper(I)-Based Complexes for Photocatalysis: Combinatorial Assembly, Discovery, and Optimization
Minozzi, Clémentine,Caron, Antoine,Grenier-Petel, Jean-Christophe,Santandrea, Jeffrey,Collins, Shawn K.
supporting information, p. 5477 - 5481 (2018/05/01)
A library of 50 copper-based complexes derived from bisphosphines and diamines was prepared and evaluated in three mechanistically distinct photocatalytic reactions. In all cases, a copper-based catalyst was identified to afford high yields, where new heteroleptic complexes derived from the bisphosphine BINAP displayed high efficiency across all reaction types. Importantly, the evaluation of the library of copper complexes revealed that even when photophysical data is available, it is not always possible to predict which catalyst structure will be efficient or inefficient in a given process, emphasizing the advantages for catalyst structures with high modularity and structural variability.
Heteroleptic copper(I) complexes prepared from phenanthroline and bis-phosphine ligands
Kaeser, Adrien,Mohankumar, Meera,Mohanraj, John,Monti, Filippo,Holler, Michel,Cid, Juan-José,Moudam, Omar,Nierengarten, Iwona,Karmazin-Brelot, Lydia,Duhayon, Carine,Delavaux-Nicot, Béatrice,Armaroli, Nicola,Nierengarten, Jean-Fran?ois
, p. 12140 - 12151 (2013/11/19)
Preparation of [Cu(NN)(PP)]+ derivatives has been systematically investigated starting from two libraries of phenanthroline (NN) derivatives and bis-phosphine (PP) ligands, namely, (A) 1,10-phenanthroline (phen), neocuproine (2,9-dimethyl-1,10-phenanthroline, dmp), bathophenanthroline (4,7-diphenyl-1,10-phenanthroline, Bphen), 2,9-diphenethyl-1,10-phenanthroline (dpep), and 2,9-diphenyl-1,10-phenanthroline (dpp); (B) bis(diphenylphosphino) methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3- bis(diphenylphosphino)propane (dppp), 1,2-bis(diphenylphosphino)benzene (dppb), 1,1′-bis(diphenylphosphino)ferrocene (dppFc), and bis[(2- diphenylphosphino)phenyl] ether (POP). Whatever the bis-phosphine ligand, stable heteroleptic [Cu(NN)(PP)]+ complexes are obtained from the 2,9-unsubstituted-1,10-phenanthroline ligands (phen and Bphen). By contrast, heteroleptic complexes obtained from dmp and dpep are stable in the solid state, but a dynamic ligand exchange reaction is systematically observed in solution, and the homoleptic/heteroleptic ratio is highly dependent on the bis-phosphine ligand. Detailed analysis revealed that the dynamic equilibrium resulting from ligand exchange reactions is mainly influenced by the relative thermodynamic stability of the different possible complexes. Finally, in the case of dpp, only homoleptic complexes were obtained whatever the bis-phosphine ligand. Obviously, steric effects resulting from the presence of the bulky phenyl rings on the dpp ligand destabilize the heteroleptic [Cu(NN)(PP)]+ complexes. In addition to the remarkable thermodynamic stability of [Cu(dpp)2]BF4, this negative steric effect drives the dynamic complexation scenario toward almost exclusive formation of homoleptic [Cu(NN)2]+ and [Cu(PP)2]+ complexes. This work provides the definitive rationalization of the stability of [Cu(NN)(PP)]+ complexes, marking the way for future developments in this field.
