Bottom-up Synthesis and Self-Assembly of Copper Clusters into Permanent Excimer Supramolecular Nanostructures.

Bottom-up Synthesis and Self-Assembly of Copper Clusters into Permanent Excimer Supramolecular Nanostructures. Angew Chem Int Ed Engl. 2018 Apr 19;: Authors: Santiago-Gonzalez B, Monguzzi A, Capitani C, Prato M, Santambrogio C, Meinardi F, Brovelli S Abstract Metal cluster are promising nontoxic candidates in optoelectronics and photonics. Recently, clusters with appropriate molecular ligands have been demonstrated to be uniquely suitable as subnanometer building blocks for supramolecular architectures with controlled secondary interactions, providing access to physical regimes not achievable with conventional intermolecular motifs. A compelling example of this is the excimer photophysics exhibited by individual cluster-based superstructures produced by top-down etching of gold nanoparticles. The generalization of the strategy to other metals and its extension to more versatile bottom-up routes remains an open challenge in metal cluster chemistry. Here, we report the first example of supramolecular architectures of copper clusters 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 appl...
Source: Angewandte Chemie - Category: Chemistry Authors: Tags: Angew Chem Int Ed Engl Source Type: research