Issue 13, 2019

Self-assembly processes of octahedron-shaped Pd6L12 cages

Abstract

Self-assembly processes of three octahedron-shaped [Pd6L12]12+ cages were investigated by an NMR-based quantitative approach. As to the on-pathway of the Pd6L12 cage assembly, the final intramolecular ligand exchange in an incomplete cage, [Pd6L12Py*]12+ (Py*: 3-chloropyridine, which was used as a leaving ligand), is the rate-determining step in the self-assembly of all the three [Pd6L12]12+ cages. Contrary to the previous finding that the self-assembly of [PdmL2m]2m+ structures (m = 2, 3) and [Pd6L8]12+ capsules from rigid multitopic ligands efficiently takes place without the formation of kinetically trapped species under mild conditions, in the self-assembly of the [Pd6L12]12+ cages, even relatively rigid ditopic ligands co-produced 100 nm-sized kinetic traps through off-pathways, which would be because the energy landscape becomes more complicated by increasing the number of components in the final assembly. It was found that when Py* was used as a leaving ligand in CD3CN, the [Pd6L12]12+ cages were produced in high yield, preventing the formation of the kinetically trapped species, which indicates that the use of Py* as a leaving ligand in CD3CN is effective to obtain the thermodynamically most stable species.

Graphical abstract: Self-assembly processes of octahedron-shaped Pd6L12 cages

Supplementary files

Article information

Article type
Paper
Submitted
15 Гру 2018
Accepted
11 Лют 2019
First published
13 Лют 2019

Dalton Trans., 2019,48, 4139-4148

Self-assembly processes of octahedron-shaped Pd6L12 cages

S. Komine, T. Tateishi, T. Kojima, H. Nakagawa, Y. Hayashi, S. Takahashi and S. Hiraoka, Dalton Trans., 2019, 48, 4139 DOI: 10.1039/C8DT04931A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements