Enhancing photoluminescence efficiency of atomically precise copper(i) nanoclusters through a solvent-induced structural transformation

Abstract

Atomically precise copper(I) nanoclusters (CuNCs) with high photoluminescence (PL) efficiency and relatively short lifetime could be promising non-precious metal-based phosphorescent emitters for organic light-emitting diodes (OLEDs), but the synthesis of...

Kernel Regulation of Ultra‐stable Cu12 Nanoclusters by Triple Collaborative Ligands

“…Each Cu 12 cluster core is stabilized by 8 PhCOO − , 4 PhC−C −, and 4 electroneutral 4,4’‐bipyridine ligands, indicating that Cu in Cu 12 ‐1 exists as Cu(I), and Cu 12 ‐1 contains no free valence electron (12‐8‐4=0). X‐ray photoelectron spectroscopy (XPS) clearly reveals that the binding energy for Cu 2p 3/2 of Cu 12 ‐1 is located at 932.97 eV, similar to other Cu(I) complexes, [44] further confirming that Cu are +1 valence in Cu 12 ‐1 (Figure S4). PhC=C − ligands adopt two types of coordination modes with Cu atoms (μ 3 : η 1 : η 1 : η 2 and μ 4 : η 1 : η 1 : η 2 : η 2 ) (Figure 1c) and the Cu−C bond lengths range from 1.906 Å to 2.071 Å.…”

An Atomically Precise Pyrazolate‐Protected Copper Nanocluster Exhibiting Exceptional Stability and Catalytic Activity

“…The usage of other Cu‐NCs (e.g., Cu10 and Cu18 ) that are not stable in basic conditions [16b] much lower the yield to 24 % and 32 %, respectively, revealing the chemical stability of Cu‐NCs played an important role during the catalysis. Furthermore, the reaction kinetics also were studied and the results revealed that the reaction followed the pseudo‐first‐order rate dependence on phenylacetylene concentration, as indicated by the linear fitting of the ln( C 0 / C ) vs reaction time (t) curve (Figure S20).…”

Solvent‐Induced Modulation in the Optical Properties of Copper Nanoclusters and Revealing the Isomeric Effect of Templates

“…These in turn control the spatial distribution of the ligand shell and consequently influence their optical signatures. Recently, considerable attempts have been deployed to design highly luminescent MNCs with tuneable optical properties by varying various external parameters post their synthesis [20–22] . Among these, solvent‐induced tailoring of the optical properties of MNCs is gaining exceptionally pronounced interest over the last decade [23,24] .…”

“…Recently, considerable attempts have been deployed to design highly luminescent MNCs with tuneable optical properties by varying various external parameters post their synthesis. [20][21][22] Among these, solvent-induced tailoring of the optical properties of MNCs is gaining exceptionally pronounced interest over the last decade. [23,24] The variation in the solvent can also evolve the possibility of inter-cluster conversion which in turn modulates their optical properties.…”