Abstract
Chemical Synthesis is an open access peer-reviewed journal publishing original research involving all areas of the chemical sciences. The journal aims to be the premier resource of seminal and insightful research and showcases for researchers in both academia and industry, providing a platform of inspiration for the future of chemistry. Chemical Synthesis intends to serve as the preeminent international chemistry journal and has the ambition to be among the first choices of chemists for publication of their discoveries.
Highlights
Coordination-driven self-assembly has proven to be a powerful synthetic strategy for the construction of discrete supramolecular coordination complexes (SCCs) including two-dimensional (2D) polygons and three-dimensional (3D) polyhedral[1-8]
When diarylethene subunits were employed as the backbones within the metallacycles and metallacages, the formation of metallacycles and metallacages could immobilize the conformations of the diarylethene subunits, leading to a great impact on the photochromic properties of the metallacages such as the photoconversion yield, photoreaction rate and fatigue-resistant property
Due to different geometrical structures of the ring-open form and ring-closed form diarylethenes, the structures of the metallacycles and metallacages showed relative size changes under light irradiation, which could be applicated in photoresponsive guest encapsulation/release, light-induced chirality switching and photo-controlled topology transformation within polymer networks
Summary
Coordination-driven self-assembly has proven to be a powerful synthetic strategy for the construction of discrete supramolecular coordination complexes (SCCs) including two-dimensional (2D) polygons and three-dimensional (3D) polyhedral[1-8]. It should be noted that, even though the above-mentioned diarylethene-based metallacycles exhibited excellent photophysical properties and ingratiating applications, they showed no fluorescence or weak fluorescence whether in the ring-open form or ring-closed form. In 2016, Han et al.[39] reported light-controlled structural conversion between a self-assembled triangle and a rhombicuboctahedral sphere within diarylethene-based SCCs. by heating a mixture of the diarylethene-based dipyridinyl ligand 29o at the para-position with [Pd(CH3CN)4](BF4) in a 2:1 ratio in CD3CN at 70 °C, the M3L6 three-membered-ring product 30 with a small amount of M4L8 four-membered-ring product was obtained, as confirmed with 1D and 2D NMR spectra and MS spectra. Similar to the polymer ligand 35o, the model diarylethene ligand without PEG chain exhibited structural conversion between small Pd3L6 triangles and large Pd24L48 rhombicuboctahedra under UV and visible light irradiation, respectively, as confirmed by NMR and ESI-TOF-MS spectra. The metallacages and organic cages were doped with rare earth upconversion materials to form hybrid materials, and the hybrid materials exhibited potential for multi-readout logic gate applications
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