Excimer Formation of Aryl Iodides Chemisorbed on Gold Nanoparticles for the Significant Enhancement of Photoluminescence

Prasenjit Maity; Kenji Sasai; Raghu Nath Dhital; Hayato Sakai; Taku Hasobe; Hidehiro Sakurai

doi:10.1021/acs.jpclett.9b03557

Excimer Formation of Aryl Iodides Chemisorbed on Gold Nanoparticles for the Significant Enhancement of Photoluminescence

J Phys Chem Lett. 2020 Feb 20;11(4):1199-1203. doi: 10.1021/acs.jpclett.9b03557. Epub 2020 Jan 30.

Authors

Prasenjit Maity^{1

2}, Kenji Sasai³, Raghu Nath Dhital^{1

3}, Hayato Sakai⁴, Taku Hasobe⁴, Hidehiro Sakurai^{1

3}

Affiliations

¹ Institute for Molecular Science , Myodaiji , Okazaki 444-8787 , Japan.
² Institute of Research and Development , Gujarat Forensic Sciences University , Gandhinagar 382007 , India.
³ Division of Applied Chemistry, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita , Osaka 565-0871 , Japan.
⁴ Department of Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama , Kanagawa 223-8522 , Japan.

PMID: 31967476
DOI: 10.1021/acs.jpclett.9b03557

Abstract

The photoluminescence properties of aryl iodides chemisorbed on gold nanoparticles were examined. Chemisorption of a series of aryl iodides onto poly(N-vinylpyrrolidone)-protected Au nanoparticles (Au:PVP) in solution resulted in highly enhanced luminescence. Kinetic studies revealed that the photoluminescence is derived from the excimer formation of aryl iodides on Au:PVP, and the process is significantly faster than intersystem crossing by the heavy atom.