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Bottom‐up Synthesis and Self‐Assembly of Copper Clusters into Permanent Excimer Supramolecular Nanostructures
Author(s) -
SantiagoGonzalez Beatriz,
Monguzzi Angelo,
Capitani Chiara,
Prato Mirko,
Santambrogio Carlo,
Meinardi Francesco,
Brovelli Sergio
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201801806
Subject(s) - supramolecular chemistry , cluster (spacecraft) , nanotechnology , nanostructure , intermolecular force , copper , self assembly , excimer , ligand (biochemistry) , luminescence , nanoparticle , chemistry , materials science , crystallography , optoelectronics , crystal structure , molecule , fluorescence , organic chemistry , computer science , biochemistry , physics , receptor , quantum mechanics , programming language
Metal clusters with appropriate molecular ligands have been shown to be suitable subnanometer building blocks for supramolecular architectures with controlled secondary interactions, providing access to physical regimes not achievable with conventional intermolecular motifs. An example is the excimer photophysics exhibited by individual cluster‐based superstructures produced by top‐down etching of gold nanoparticles. Now, a supramolecular architecture of copper clusters is presented with controlled optical properties and efficient non‐resonant luminescence produced via a novel bottom‐up synthesis using mild green reductants followed by a ligand exchange reaction and spontaneous supramolecular assembly. Spectroscopic experiments confirm the formation of the intercluster network and reveal the permanent nature of their excimer‐like behavior, thus extending the potential impact and applicability of metal cluster superstructures as efficient and stable non‐resonant single‐particle emitters.