Photophysical Activity and Host-Guest Behavior of Ruthenium Polypyridyl Catalysts Encapsulated in Cucurbit[10]uril
- 5 July 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 59 (13), 9135-9142
- https://doi.org/10.1021/acs.inorgchem.0c00986
Abstract
This work outlines a strategy to combine the use of visible light and confined spaces to form a supramolecular photocatalyst system. Polypyridyl ruthenium(II) complexes [Ru(bpy)(3)](2+) (bpy = 2,2'-bipyridine), [Ru(bpy)(2)(bpm)](2+) (bpm = 2,2'-bipyrimidine), and [Ru(bpy)(2)(bpz)](2+) (bpz = 2,2'-bipyrazine) are encapsulated in cucurbit[10]uril to form host-guest systems in aqueous solution. The photophysical properties of the complexes are altered by encapsulation, with improved emissive behavior for the heteroleptic complexes. Oxidative quenching of the photocatalyst's excited state via intermolecular charge transfer to methyl viologen can occur within the internal cavity, which acts to preorganize the reagents. The host-guest system containing [Ru(bpy)(3)](2+) can bind suitable substrates, and essential criteria for its use as a supramolecular photocatalyst are investigated.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (KO 1537/18-1)
- Australian Research Council (DP160100870)
This publication has 68 references indexed in Scilit:
- The aqueous supramolecular chemistry of cucurbit[n]urils, pillar[n]arenes and deep-cavity cavitandsChemical Society Reviews, 2017
- Cucurbituril-Based Molecular RecognitionChemical Reviews, 2015
- Dynamically Analyte-Responsive Macrocyclic Host–Fluorophore SystemsAccounts of Chemical Research, 2014
- The strategic use of supramolecular pKa shifts to enhance the bioavailability of drugsAdvanced Drug Delivery Reviews, 2012
- Cucurbituril chemistry: a tale of supramolecular successRSC Advances, 2011
- Deep Inside Cucurbiturils: Physical Properties and Volumes of their Inner Cavity Determine the Hydrophobic Driving Force for Host–Guest ComplexationIsrael Journal of Chemistry, 2011
- Encapsulation of Drug Molecules by Cucurbiturils: Effects on their Chemical Properties in Aqueous SolutionIsrael Journal of Chemistry, 2011
- The Potential of Cucurbit[n]urils in Drug DeliveryIsrael Journal of Chemistry, 2011
- Improving platinum(II)-based anticancer drug delivery using cucurbit[n]urilsJournal of Inorganic Biochemistry, 2008
- The Cucurbit[n]uril FamilyAngewandte Chemie-International Edition, 2005