Achieving organic nanoparticles with redox-active capabilities: synthesis of gold nanoparticles in water as a proof-of-principle
- 269 Downloads
Herein, we present a unique approach to easily achieve redox-active nanosized organic particles in aqueous environment using a strategy based on ion association between large organic ions, namely tetraphenylborate anions and thiazole orange cations. The anionic tetraphenylborate associates tightly with the cationic redox-active thiazole orange producing a well-defined meta-stable organic nanoscale particle (73 ± 20 nm). These redox-active nanosized organic particles can act as seed sites for metal reductions and as a proof-of-concept, they were used to reduce gold(III) to gold nanoparticles in a neutral, aqueous environment at room temperature.
KeywordsOrganic nanoparticles Thiazole orange Tetraphenylborate Redox active Gold nanoparticle Green chemistry
This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). The authors would like to thank Mr. W. White for mass spectrometry.
- Alvaro M, Cojocaru B, Ismail AA, Petrea N, Ferrer B, Harraz FA, Parvulescu VI, Garcia H (2010) Visible-light photocatalytic activity of gold nanoparticles supported on template-synthesized mesoporous titania for the decontamination of the chemical warfare agent Soman. Appl Catal B-Environ 99(1–2):191–197CrossRefGoogle Scholar
- Demers LM, Mirkin CA, Mucic RC, Reynolds RA, Letsinger RL, Elghanian R, Viswanadham G (2000) A fluorescence-based method for determining the surface coverage and hybridization efficiency of thiol-capped oligonucleotides bound to gold thin films and nanoparticles. Anal Chem 72(22):5535–5541CrossRefGoogle Scholar
- Handley DA (1989) Colloidal gold: principles, methods, and applications. Academic Press, LondonGoogle Scholar
- Link S, El-Sayed MA (1999) Spectral properties and relaxation dynamics of surface plasmon electronic oscillations in gold and silver nanodots and nanorods. J Phys Chem B 103(40):8410–8426Google Scholar