Home
Resources
Publications
Solid-state Characterization and Photoinduced Intramolecular Electron Transfer in a Nanoconfined Octacationic homo[2]catenane

Solid-state Characterization and Photoinduced Intramolecular Electron Transfer in a Nanoconfined Octacationic homo[2]catenane

Jonathan C Barnes, Marco Frasconi, Ryan M Young, Nezar H Khdary, Wei-Guang Liu, Scott M Dyar, Paul R McGonigal, Ian C Gibbs-Hall, Christian S Diercks, Amy A Sarjeant, Charlotte L Stern, William A Goddard 3rd, etc.

J Am Chem Soc. 2014 Jul 30;136(30):10569-72.

PMID: 25010450

Abstract:

An octacationic homo[2]catenane comprised of two mechanically interlocked cyclobis(paraquat-p-phenylene) rings has been obtained from the oxidation of the septacationic monoradical with nitrosonium hexafluoroantimonate. The nanoconfinement of normally repulsive bipyridinium units results in the enforced π-overlap of eight positively charged pyridinium rings in a volume of <1.25 nm(3). In the solid state, the torsional angles around the C-C bonds between the four pairs of pyridinium rings range between 16 and 30°, while the π-π stacking distances between the bipyridinium units are extended for the inside pair and contracted for the pairs on the outside--a consequence of Coulombic repulsion between the inner bipyridinium subunits. In solution, irradiation of the [2]catenane at 275 nm results in electron transfer from one of the paraphenylene rings to the inner bipyridinium dimer, leading to the generation of a temporary mixed-valence state within the rigid and robust homo[2]catenane.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP16941063	Nitrosonium hexafluoroantimonate		16941-06-3	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: