Inorganic/organic hybrid nanoreactors based on cyclic and cubic siloxane scaffolds

Macromolecules

Volumn 38, Issue 15, 2005, Pages 6231-6235

  Chauhan, Bhanu P S ^a,b   Latif, Umar ^a  

^a CITY UNIVERSITY OF NEW YORK   (United States)

^b CITY UNIVERSITY OF NEW YORK   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

METALLIC NANOPARTICLES; NANOPARTICLE SOLUTIONS; SILICON OLIGOMERS; SILOXANE POLYMERS;

MOLECULAR STRUCTURE; OLIGOMERS; PALLADIUM; POLYETHYLENE GLYCOLS; SILICON; SILVER; SOLUTIONS; SYNTHESIS (CHEMICAL);

NANOSTRUCTURED MATERIALS;

EID: 23744466280     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma050344f     Document Type: Article

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57. In a typical reduction procedure, silver acetate (0.0083 g, 0.05 mmol) was suspended in toluene (20 mL) in a 100 mL Schlenk tube equipped with a magnetic stirrer. After continuous stirring for about 10 min, polymer 2 (0.377 g, 0.2 mmol) was added, and resulting mixture was stirred at room temperature. After 45 min, the color of reaction mixture changed to light yellow. The color change indicated that the reduction of silver acetate to silver nanoparticles has ensued. In the course of 4 h, the color changed to dark yellow and then to brown, indicating the complete reduction of silver acetate to silver colloids. The resulting nanoparticle solution was centrifuged at 3000 rpm for 10 min in order to remove unreacted silver acetate. The formation of silver nanoparticles was confirmed by UV-vis spectroscopy and transmission electron microscopy. In a similar fashion, reduction reactions with various ratios of polymer were examined. In case of palladium, stable black homogeneous colloidal solution was obtained.