Intense millisecond-long red luminescence from heteroleptic Cu(I) 2,1,3-benzothiadiazole complexes

Substituted Pyrrole‐based Schiff Bases: Effect On The Luminescence Of Neutral Heteroleptic Cu(I) Complexes

“…[d] Stokes shift, cm phosphines determined improved photophysical properties of the corresponding Cu(I) complexes. [48][49][50][51] In this case, PPh 3 exhibited a higher P2-Cu1-P1 angle compared to DPEphos and Xantphos, thus supporting the enhanced emissive features of the related Cu(I) derivatives based on the former with respect to the latter (see Tables S2, S4, S6 and S8).…”

“…This outcome can be partly justified considering the energy gap law, i. e. the increase of k nr due to vibrational coupling for longer wavelengths. [46][47][48] In contrast to what is commonly observed in similar Cu(I) complexes, [1,35,44] the use of chelating biphosphines such as DPEphos and Xantphos does not improve the photoluminescent features, presumably because the rigidification of the structure does not compensate the non-radiative processes. Moreover, it is widely recognized that a wide bite angle in the , nm (ɛ/10 4 M À 1 cm À 1 ) λ em [b,c] , nm (n.i.)…”

Synthesis and luminescent properties of three excellent yellow emissive Cu(i) complexes based on the diphosphine ligand and the diimine ligand

“…The bond angles range as follows: P–Cu–P, P–Cu–N, P–Cu–X, X–Cu–N: 111.58(3)°, 108.68(8)–110.97(8)°, 106.24(4)–116.95(4)°, and 101.74(8)° (Table S1†). These values show no significant differences compared to those of the complexes discussed in other articles, 43–49 indicating a distorted tetrahedral geometry around the coordination centers. For complex 3 , as shown in Fig.…”

Single-Crystal X-ray Structure Determination of Tris(pyrazol-1-yl)methane Triphenylphosphine Copper(I) Tetrafluoroborate, Hirshfeld Surface Analysis and DFT Calculations

“…It is therefore likely to suppose that the anion actively participates in the fluxional behaviour, stabilizing the coordinatively unsaturated trigonal complex. The ability of tetrafluoroborate to behave as a ligand towards Cu(I) in so-called coinage (or regium) bonds is well documented in the literature [68][69][70][71]. On the other hand, Figure 8 reveals that a fluxional path involving the Cu-P bond is much less competitive.…”

“…It is therefore likely to suppose that the anion actively participates in the fluxional behaviour, stabilizing the coordinatively unsaturated trigonal complex. The ability of tetrafluoroborate to behave as a ligand towards Cu(I) in so-called coinage (or regium) bonds is well documented in the literature[68][69][70][71]. On the other hand, Figure8reveals that a fluxional path involving the Cu-P bond is much less competitive.Attempts to observe possible intermediate species involved in the fluxional behaviour were carried out by recording the 1 H, 31 P{ 1 H} and 19 F{ 1 H} NMR spectra at variable temperatures (FiguresS3-S5), but no resonance attributable to species such as [Cu(κ 2 -CHpz 3 )(κ 2 -BF 4 )(PPh 3 )] was clearly detected.…”