Self-assembly and Cycling of a Three-state Pdx Ly Metallosupramolecular System

Dan Preston; Amanda R Inglis; James D Crowley; Paul E Kruger

doi:10.1002/asia.201901238

Self-assembly and Cycling of a Three-state Pd_x L_y Metallosupramolecular System

Chem Asian J. 2019 Oct 1;14(19):3404-3408. doi: 10.1002/asia.201901238. Epub 2019 Sep 17.

Authors

Dan Preston^{1

2}, Amanda R Inglis¹, James D Crowley^{3

4}, Paul E Kruger^{1

2}

Affiliations

¹ School of Physical and Chemical Sciences, University of Canterbury, Christchurch, 8041, New Zealand.
² MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, 8041, New Zealand.
³ Department of Chemistry, University of Otago, Dunedin, 9054, New Zealand.
⁴ MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Otago, Dunedin, New Zealand.

PMID: 31483940
DOI: 10.1002/asia.201901238

Abstract

The use of stimuli to induce reversible structural transformations in metallosupramolecular systems is of keen interest to chemists seeking to mimic the way that Nature effects conformational changes in biological machinery. While a wide array of stimuli have been deployed towards this end, stoichiometric changes have only been explored in a handful of examples. Furthermore, switching has generally been between only two distinct states. Here we use a simple 2-(1-(pyridine-4-methyl)-1H-1,2,3-triazol-4-yl)pyridine "click" ligand in combination with Pd^II in various stoichiometries and concentrations to quantitatively access and cycle between three distinct species: a [PdL₂ ]²⁺ monomer, a [Pd₂ L₂ ]⁴⁺ dimer, and a [Pd₉ L₁₂ ]¹⁸⁺ cage.

Keywords: palladium(II); self-assembly; structural transformation; supramolecular chemistry.