Photoluminescent and oxygen sensing properties of core–shell nanospheres based on a covalently grafted ruthenium(II) complex
✍ Scribed by Shuli Wang; Bin Li; Liming Zhang; Lina Liu; Yinghui Wang
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 239 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0268-2605
- DOI
- 10.1002/aoc.1682
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
SiO~2~ nanospheres coated with silica chemically doped with a ruthenium complex [Ru(Bphen)~2~PhenSi]Cl~2~ (denoted as Ru, there Bphen = 4,7‐diphenyl‐1,10‐phenanthrolin, PhenSi = modified 1,10‐phenathroline) were prepared using a simple solution‐based method. Field‐emission scanning electron microscopy (FE‐SEM) showed that the pure SiO~2~ nanospheres with a mean diameter of ∼185 nm were successfully coated with Ru complex–chemically doped SiO~2~ shell with a thickness of ∼45 nm. The obtained core‐shell nanosphere materials exhibited bright red triplet metal‐to‐ligand charge transfer (^3^MLCT) emission, and their photoluminescent intensity was sensitive to oxygen concentration. These properties make them promising candidates for biomarkers and optical oxygen sensors, which can measure the O~2~ concentration in biological fluids. Copyright © 2010 John Wiley & Sons, Ltd.