Journal of Nanomaterials & Molecular NanotechnologyISSN: 2324-8777

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Research Article, J Nanomater Mol Nanotechnol Vol: 3 Issue: 2

Rapid Induced Aggregation of Gold Nanoparticles by Diolefinic Dyes

Ahmed A Abo-Alhasan1, Samy A El-Daly1,2, Morad M El-Hendawy3,5, Shahar H El-Khalfy1 and El-Zeiny M Ebeid1,4*
1Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
2Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
3Chemistry Department, Faculty of Science, Kafrelsheikh University, Kafrelsheikh, Egypt
4Misr University for Science and Technology (MUST), 6th of October City, Egypt
5Higher Institute for Engineering and Technology, Kafrelsheikh, Egypt
Corresponding author : Dr. El-Zeiny M. Ebeid
Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
Tel: +2-0403318302; E-mail: [email protected]
Received: January 22, 2013 Accepted: March 11, 2014 Published: March 15, 2014
Citation: Abo-Alhasan AA, El-Daly SA, El-Hendawy MM, El-Khalfy SH, Ebeid EM (2014) Rapid Induced Aggregation of Gold Nanoparticles by Diolefinic Dyes. J Nanomater Mol Nanotechnol 3:2. doi:10.4172/2324-8777.1000142

Abstract

Rapid Induced Aggregation of Gold Nanoparticles by Diolefinic Dyes

Aggregation kinetics of gold nanoparticles (Au NPs) interaction in the presence of some diolefinic dyes, namely 1,4-bis (β-pyridyl-2-vinyl) benzene (P2VB), 1,4 bis(2-methylstyryl) benzene (MSB) and 2,5 distyrylpyrazine (DSP), were studied in methanol using steady state UV-Vis spectrophotometry and stopped-flow spectrophotometry. All three dyes induced the aggregation of Au NPs, but with different rates. The rate of interaction of P2VB and MSB with Au NPs were in time-scale of milliseconds, 6 ms-1 and 3.25 ms-1, respectively, while the interaction between DSP and Au NPs occurred in time-scale of minutes. The rates of interaction between Au NPs and these dyes go in the order of P2VB > MSB » DSP. The density functional theory (CAM-B3LYP) predicted that the dye with higher group charge on the terminal moieties possess higher affinity toward the aggregation as it strengthen its electrostatic interactions with the citrate-capped Au NPs.

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