Abstract
Water-soluble gold nanoparticles (AuNP) stabilized with cavitands having carboxylic acid groups have been synthesized and characterized by a variety of techniques. Apparently, the COOH groups similar to thiol are able to prevent aggregation of AuNP. These AuNP were stable either as solids or in aqueous solution. Most importantly, these cavitand functionalized AuNP were able to include organic guest molecules in their cavities in aqueous solution. Just like free cavitands (e.g., octa acid), cavitand functionalized AuNP includes guests such as 4,4′-dimethylbenzil and coumarin-1 through capsule formation. The exact structure of the capsular assembly is not known at this stage. Upon excitation there is communication between the excited guest present in the capsule and gold atoms and this results in quenching of phosphorescence from 4,4′-dimethylbenzil and fluorescence from coumarin-1.
| Original language | English |
|---|---|
| Pages (from-to) | 12703-12709 |
| Number of pages | 7 |
| Journal | Langmuir |
| Volume | 29 |
| Issue number | 41 |
| DOIs | |
| State | Published - Oct 15 2013 |
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ASJC Scopus subject areas
- Electrochemistry
- Condensed Matter Physics
- Surfaces and Interfaces
- Materials Science(all)
- Spectroscopy
Cite this
Synthesis, characterization, guest inclusion, and photophysical studies of gold nanoparticles stabilized with carboxylic acid groups of organic cavitands. / Mondal, Barnali; Kamatham, Nareshbabu; Samanta, Shampa R.; Jagadesan, Pradeepkumar; He, Jibao; Ramamurthy, Vaidhyanathan.
In: Langmuir, Vol. 29, No. 41, 15.10.2013, p. 12703-12709.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis, characterization, guest inclusion, and photophysical studies of gold nanoparticles stabilized with carboxylic acid groups of organic cavitands
AU - Mondal, Barnali
AU - Kamatham, Nareshbabu
AU - Samanta, Shampa R.
AU - Jagadesan, Pradeepkumar
AU - He, Jibao
AU - Ramamurthy, Vaidhyanathan
PY - 2013/10/15
Y1 - 2013/10/15
N2 - Water-soluble gold nanoparticles (AuNP) stabilized with cavitands having carboxylic acid groups have been synthesized and characterized by a variety of techniques. Apparently, the COOH groups similar to thiol are able to prevent aggregation of AuNP. These AuNP were stable either as solids or in aqueous solution. Most importantly, these cavitand functionalized AuNP were able to include organic guest molecules in their cavities in aqueous solution. Just like free cavitands (e.g., octa acid), cavitand functionalized AuNP includes guests such as 4,4′-dimethylbenzil and coumarin-1 through capsule formation. The exact structure of the capsular assembly is not known at this stage. Upon excitation there is communication between the excited guest present in the capsule and gold atoms and this results in quenching of phosphorescence from 4,4′-dimethylbenzil and fluorescence from coumarin-1.
AB - Water-soluble gold nanoparticles (AuNP) stabilized with cavitands having carboxylic acid groups have been synthesized and characterized by a variety of techniques. Apparently, the COOH groups similar to thiol are able to prevent aggregation of AuNP. These AuNP were stable either as solids or in aqueous solution. Most importantly, these cavitand functionalized AuNP were able to include organic guest molecules in their cavities in aqueous solution. Just like free cavitands (e.g., octa acid), cavitand functionalized AuNP includes guests such as 4,4′-dimethylbenzil and coumarin-1 through capsule formation. The exact structure of the capsular assembly is not known at this stage. Upon excitation there is communication between the excited guest present in the capsule and gold atoms and this results in quenching of phosphorescence from 4,4′-dimethylbenzil and fluorescence from coumarin-1.
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U2 - 10.1021/la403310e
DO - 10.1021/la403310e
M3 - Article
VL - 29
SP - 12703
EP - 12709
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 41
ER -