Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 18, Pages 15582-15590Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b18663
Keywords
graphene oxide; reduced graphene oxide; ruthenium(II); FRET; pyrene; esterase
Funding
- University of Hong Kong under the Strategically Oriented Research Theme on Functional Materials for Molecular Electronics Towards Materials and Energy Applications
- University Grants Committee Areas of Excellence Scheme [AoE/P-03/08]
- General Research Fund (GRF) grant from the Research Grants Council of Hong Kong Special Administrative Region, China [HKU17304715]
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Pyrene-containing ruthenium(II) tris-bipyridine complexes have been prepared. These complexes have been non-covalently attached onto the few-layered graphene oxide (GO) sheets through their high binding affinity for flat pi-surfaces. Alternatively, the reduced graphene oxide (rGO) sheets have also been covalently functionalized with the ruthenium(II) trisbipyridine complex. The prepared conjugates have been characterized by transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDX), X-ray diffraction (XRD), atomic force microscopy (AFM), Raman spectroscopy, thermogravimetric analysis (TGA), and UV-visible absorption spectroscopy. The energy transfer properties of the resulted conjugates between the graphene and transition metal complexes have been studied via esterase hydrolysis. The energy transfer efficiencies were found to vary with the separation between the donor and the acceptor units.
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