| Title: |
pH-Induced transformation of ligated Au-25 to brighter Au-23 nanoclusters |
| Authors: |
Waszkielewicz, M.; Olesiak-Banska, J.; Comby-Zerbino, Clothilde; Bertorelle, Franck; Dagany, Xavier; Bansal, A. K.; Sajjad, M. T.; Samuel, I. D. W.; Sanader, Z.; Rozycka, M.; Wojtas, M.; Matczyszyn, K.; Bonacic-Koutecky, V.; Antoine, Rodolphe; Ozyhar, A.; Samoc, M. |
| Contributors: |
Wroclaw University of Science and Technology = Politechnika Wroclawska Wrocław; Institut Lumière Matière Villeurbanne (ILM); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS); SUPA School of Physics and Astronomy University of St Andrews; University of St Andrews Scotland -Scottish Universities Physics Alliance (SUPA); University of Split = Université de Split (UNIST); Humboldt-Universität zu Berlin = Humboldt University of Berlin = Université Humboldt de Berlin (HU Berlin) |
| Source: |
ISSN: 2040-3364. |
| Publisher Information: |
CCSD; Royal Society of Chemistry |
| Publication Year: |
2018 |
| Collection: |
HAL Lyon 1 (University Claude Bernard Lyon 1) |
| Subject Terms: |
[CHIM]Chemical Sciences; [PHYS]Physics [physics]; [SPI]Engineering Sciences [physics] |
| Description: |
International audience ; Thiolate-protected gold nanoclusters have recently attracted considerable attention due to their size-dependent luminescence characterized by a long lifetime and large Stokes shift. However, the optimization of nanocluster properties such as the luminescence quantum yield is still a challenge. We report here the transformation of Au 25 Capt 18 (Capt labels captopril) nanoclusters occurring at low pH and yielding a product with a much increased luminescence quantum yield which we have identified as Au 23 Capt 17 . We applied a simple method of treatment with HCl to accomplish this transformation and we characterized the absorption and emission of the newly created ligated nanoclusters as well as their morphology. Based on DFT calculations we show which Au nanocluster size transformations can lead to highly luminescent species such as Au 23 Capt 17 . |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1039/c8nr00660a |
| Availability: |
https://univ-lyon1.hal.science/hal-02289862; https://univ-lyon1.hal.science/hal-02289862v1/document; https://univ-lyon1.hal.science/hal-02289862v1/file/hal-02289862.pdf; https://doi.org/10.1039/c8nr00660a |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.1D6668B8 |
| Database: |
BASE |