Flexible Modulation of CO-Release Using Various Nuclearity of Metal Carbonyl Clusters on Graphene Oxide for Stroke Remediation
Journal
Advanced Healthcare Materials
Journal Volume
7
Journal Issue
5
Pages
1701113
Date Issued
2018
Author(s)
Tan, M.J.
Pan, H.-C.
Tan, H.R.
Chai, J.W.,
Lim, Q.F.
Wong, T.I.
Zhou, X.
Hong, Z.-Y.,
Liao, L.-D.
Abstract
Utilizing the size-dependent adsorption properties of ruthenium carbonyl clusters (Ru–carbon monoxide (CO)) onto graphene oxide (GO), a facile CO-release platform for in situ vasodilation as a treatment for stroke-related vascular diseases is developed. The rate and amount of formation of the CO-release-active RuII(CO)2 species can be modulated by a simple mixing procedure at room temperature. The subsequent thermally induced oxidation of RuII(CO)2 to RuO2 on the GO surface results in the release of CO. Further modulation of thermal and CO-release properties can be achieved via a hybridization of medium- and high-nuclearity of Ru–CO clusters that produces a RuO2/RuII(CO)2/6Ru–CO–GO composite, where 6Ru–CO–GO provides a photothermally activated reservoir of RuII(CO)2 species and the combined infrared absorption properties of GO and RuO2 provides photothermal response for in situ CO-release. The RuO2/RuII(CO)2/6Ru–CO–GO composite does not produce any cytotoxicity and the efficacy of the composite is further demonstrated in a cortical photothrombotic ischemia rat model. ? 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Subjects
CO-release; graphene oxide; hybridization; nuclearity of clusters; ruthenium carbonyl cluster; stroke
Other Subjects
Carbon monoxide; Carbonylation; Graphene; Graphene oxide; Light absorption; Modulation; Adsorption properties; hybridization; Infrared absorption properties; Metal-carbonyl clusters; Nuclearity; Photothermal response; Ruthenium carbonyl clusters; stroke; Ruthenium compounds; carbon dioxide; carbon monoxide; carbonyl derivative; graphene oxide; metal; ruthenium; coordination compound; graphene oxide; graphite; ruthenium; absorption; adsorption kinetics; Article; brain ischemia; cerebrovascular accident; cytotoxicity; hybridization; neuromodulation; neuroprotection; nonhuman; oxidation; particle size; photothermal therapy; priority journal; room temperature; surface property; vasodilatation; animal; cell line; cerebrovascular accident; chemistry; human; metabolism; pathology; phototherapy; rat; thermotherapy; Animals; Cell Line; Coordination Complexes; Graphite; Humans; Hyperthermia, Induced; Phototherapy; Rats; Ruthenium; Stroke
Type
journal article