Abstract
Self‐assembled metallosupramolecular architectures (MSAs) with built‐in functionalities such as light‐harvesting metal centers are a promising approach for developing emergent properties within discrete molecular systems. Herein we describe the synthesis of two new but simple “click” ligands featuring a bidentate 2‐pyridyl‐1,2,3‐triazole chelate pocket linked to a monodentate pyridyl (either 3‐ or 4‐substituted, L1 and L2) unit. The ligands and the corresponding four PdIIand PtIImetallo‐ligands (Pd1, Pd2, Pt1 and Pt2) were synthesized and characterized using nuclear magnetic resonance (NMR) spectroscopy, electrospray ionization mass spectrometry (ESI‐MS), and X‐ray crystallography. Solid‐state characterization of the series of ligands and metallo‐ligands revealed that these compounds display a co‐planar conformation of all the aryl units. The PtIIcontaining metallo‐ligands (Pt1 and Pt2) were found to assemble into square (Sqr) and triangular (Tri) shaped architectures when combined with neutral PdCl2 linker units. Additionally, the ability of the PtIImetallo‐ligands and Tri to photocatalyze the cycloaddition of singlet oxygen to anthracene was investigated.
In the pocket: Platinum(II) and palladium(II) containing metallo‐ligands featuring a bidentate 2‐pyridyl‐1,2,3‐triazole chelate pocket linked to a monodentate pyridyl units are described. The PtII containing metallo‐ligands were found to assemble into square (Sqr) and triangular (Tri) shaped metallo‐macrocycle architectures when combined with neutral PdCl2 linker units. Additionally, the ability of the PtII metallo‐ligands and Tri to photocatalyze the cycloaddition of singlet oxygen to anthracene was investigated.