Pyridylarsine-based Cu(i) complexes showing TADF mixed with fast phosphorescence: a speeding-up emission rate using arsine ligands

Abstract

Can arsine ligands be preferred over similar phosphines to design Cu(I)-based TADF materials? The present study reveals that arsines can indeed be superior to reach shorter decay times of Cu(I)...

Thermo-, Mechano-, and Vapochromic Dinuclear Cuprous-Emissive Complexes with a Switchable CH3CN–Cu Bond

“…Both Cu­(I) atoms are in a distorted P 2 N 2 tetrahedral environment and are separated by 3.288 Å (Tables S1 and S2), as a hint of no Cu···Cu interaction. − Two N atoms bound to Cu1 are from the same fptz, while for Cu2, the two N atoms come from a fptz and a coordinated CH 3 CN. The CH 3 CN–Cu length is 2.138(5) Å, which is longer than those (1.952(5)–2.1275(13) Å) documented in the previously reported dinuclear Cu­(I) complexes, − suggesting that the binding between CH 3 CN and Cu­(I) ion is relatively weak and the coordinated CH 3 CN molecule is easily lost under various stimuli such as heating and grinding, which is supported by a free CH 3 CN proton signal present in the 1 H NMR spectra of 1 (Figure S1).…”

So Close, Yet so Different: How One Donor Atom Changes Significantly the Photophysical Properties of Mononuclear Cu(I) Complexes

“…In fact, replacing a donor atom with a higher homologue in isostructural molecular systems results in a significant change in the lifetime of the excited state. 4 Consequently, the search for novel classes of ligands for the comparative design of luminescent complexes is one of the main aims of current investigations in this field. In this respect, pyridyl-functionalized phosphinines of type A (Figure 1), isostructural to 2,2′-bipyridines (B), are an example of such new potentially applicable compounds.…”

Structural characterization and luminescence properties of trigonal Cu(i) iodine/bromine complexes comprising cation–π interactions

“…Nevertheless, the emission decay times increase by about 2.22 (for 1 ) and 3.70 (for 2 ) times upon cooling down from 298 K to 77 K. The relatively apparent changes in radiative lifetime indicate that the luminescence could not be simply ascribed to pure phosphorescence. With reference to the recent spectral studies of Cu( i ) complexes, 53,54 the luminescence in the present case is reasonably represented by TADF-assisted phosphorescence.…”