Blue Luminescence of Dendrimer-Encapsulated Gold Nanoclusters

• Published in: Chemphyschem Vol. 15; no. 14; pp. 2917 - 2921
• Main Authors: Kim, Jun Myung, Sohn, So Hyeong, Han, Noh Soo, Park, Seung Min, Kim, Joohoon, Song, Jae Kyu
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 06.10.2014; WILEY‐VCH Verlag; Wiley; Wiley Subscription Services, Inc
• Subjects: Chemistry; Colloidal state and disperse state; dendrimers; Exact sciences and technology; General and physical chemistry; gold; Luminescence; nanoparticles; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Spectrum analysis; time-resolved spectroscopy; time-resolved spectroscopy; Nanocluster; Gold; nanoparticles; Branched polymer; dendrimers; Nanoparticle; Luminescence; Transition metal; Dendritic structure; gold; luminescence
• ISSN: 1439-4235; 1439-7641
• DOI: 10.1002/cphc.201402287

Direct evidence for the blue luminescence of gold nanoclusters encapsulated inside hydroxyl‐terminated polyamidoamine (PAMAM) dendrimers was provided by spectroscopic studies as well as by theoretical calculations. Steady‐state and time‐resolved spectroscopic studies showed that the luminescence of the gold nanoclusters consisted largely of two electronic transitions. Theoretical calculations indicate that the two transitions are attributed to the different sizes of the gold nanoclusters (Au8 and Au13). The luminescence of the gold nanoclusters was clearly distinguished from that of the dendrimers. A shining heart of gold: The luminescence of gold nanoclusters that are encapsulated inside hydroxyl‐terminated PAMAM dendrimers contains two electronic transitions of Au8 and Au13. The luminescence of the gold nanoclusters is clearly distinguished from that of the dendrimers.