A series of luminescent Cu(i) complexes based on the diphosphine ligand and diimine ligand: weak intermolecular interactions, terahertz spectroscopy and photoproperties

Abstract

Five novel mononuclear [Cu(Bphen)(bdppmapy)]X complexes showing photoluminescence were synthesized. The same diphosphine ligand and diimine ligand and different Cu(I) salts were used in the one-pot synthesis of complexes 1-5. These...

Study on the luminescence properties of ionic [Cu(N^N)(P^P)]+ complexes: influence of ligands, counteranions and weak interactions

“…There is an obvious absorption peak at 1.2–1.6 THz in the THz absorption spectra of the phen series complexes 1a–4a , consistent with the previous studies, which is related to the C–H⋯π interactions in the complexes. 49,56–58 The Dpq series complexes 3b and 4b with C–H⋯π interactions show obvious absorption peaks near 1.2–1.6 THz. Due to the absence of π–π and C–H⋯π interactions in complexes 1b and 2b , there is almost no absorption in the corresponding low frequency range of the THz spectra and the absorption peak begins to appear after 2.0 THz.…”

“…44,45 All these complexes have relatively weak band tails at 350-450 nm (ε = 1.1 × 10 4 -2.2 × 10 4 M −1 cm −1 ), combined with the results of TD-DFT calculations and previously reported Cu(I)-diphosphine-diimine complexes, which can be ascribed to metal-to-ligand charge transfer (MLCT). [46][47][48][49][50]…”