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The Metal–Metal‐to‐Ligand Charge Transfer Excited State and Supramolecular Polymerization of Luminescent Pincer Pd II –Isocyanide Complexes
Author(s) -
Wan Qingyun,
To WaiPong,
Yang Chen,
Che ChiMing
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201712249
Subject(s) - isocyanide , supramolecular chemistry , chemistry , pincer movement , photochemistry , ligand (biochemistry) , intermolecular force , excited state , pincer ligand , polymerization , time dependent density functional theory , metal , crystallography , density functional theory , stereochemistry , molecule , computational chemistry , polymer , crystal structure , organic chemistry , catalysis , biochemistry , receptor , physics , nuclear physics
Pincer Pd II –isocyanide complexes are described that display intermolecular interactions and emissive 3 MMLCT excited states in aggregation state(s) at room temperature. The intermolecular Pd II −Pd II and ligand–ligand interactions drive these complexes to undergo supramolecular polymerization in a living manner. Comprehensive spectroscopic studies reveal a pathway with a kinetic trap that can be modulated by changing the counteranion and metal atom. The Pd II supramolecular assemblies comprise two different aggregation forms with only one to be emissive. DFT/TDDFT calculations lend support to the MMLCT absorption and emission of these pincer Pd II –isocyanide aggregates.