Naslov
Intramolecular Charge Transfer and Solvation Dynamics of Thiolate-Protected Au20(SR)16 Clusters Studied by Ultrafast Measurement

Autori
Meng, Zhou ; Vdović, Silvije ; Long, Saran ; Zhu, Man-Zhou ; Yan, Linyin ; Wang, Yingying ; Niu, Yingli ; Wang, Xuefei ; Guo, Qianjin ; Jin, Rongchao ; Xia, Andong

Izvornik
The Journal of Physical Chemistry. A (1089-5639) 117 (2013), 40; 10294-10303

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
monolayer protected Au clusters (MPC); intramolecular charge transfer (ICT); solvation

Sažetak
It is accepted that the monolayer ligand shell in monolayer protected gold nanoclusters (MPCs) plays an important role in stabilizing the metal core structure. Previous reports have shown that the core and the shell do not interact chemically, and very few studies investigating the intramolecular charge transfer (ICT) between the core and ligand shell in clusters have been reported. The underlying excited state relaxation mechanisms about the influence of solvents, the optically excited vibration and the roles of core/shell in charge transfer remain unknown to a large extent. Here we report a femtosecond transient absorption study of a Au20(SR)16 (R=CH2CH2Ph) cluster in toluene and tetrahydrofuran. The ICT from the outside shell to the inside core upon excitation in Au20(SR)16 is identified. The observed solvation-dependent oscillations in different solvents further confirms the photoinduced ICT formation in Au20(SR)16. The results provide fundamental understanding of the structure-property relationships about the solvation–dependent core/shell interaction in Au MPCs.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA