Family of Highly Luminescent Pure Ionic Copper(I) Bromide Based Hybrid Materials

While
a number of highly luminescent copper­(I) halide based hybrid
materials built on coordinate bonds (Cu–L; L = N, P, S-based
ligands) have been obtained, the poor structural stability largely
limited their commercialization. In contrast, according to the previous
studies, the ionic structures (L-free) are more stable than those
built on Cu–L coordinate bonds. However, the extremely weak
emission hinders their optical applications. Herein, we report a tetra-alkylammonium-cation-induced
strategy for the synthesis of stable and highly luminescent ionic
CuBr-based hybrid materials. It is interesting to find that the tetra-alkylammonium
cations with different chains could induce diverse CuBr-based anions.
Moreover, most of these CuBr-based hybrids are highly luminescent,
which makes them promising candidates as an alternative to phosphors
and with potential applications in sensing.