TY - JOUR
T1 - Contribution of Metal Defects in the Assembly Induced Emission of Cu Nanoclusters
AU - Wu, Zhennan
AU - Liu, Huiwen
AU - Li, Tingting
AU - Liu, Jiale
AU - Yin, Jun
AU - Mohammed, Omar F.
AU - Bakr, Osman
AU - Liu, Yi
AU - Yang, Bai
AU - Zhang, Hao
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by NSFC (51425303), the National key research and development program of China (2016YFB0401701), the 973 Program of China (2014CB643503), and the Special Project from MOST of China.
PY - 2017/3/20
Y1 - 2017/3/20
N2 - Aggregation/assembly induced emission (AIE) has been observed for metal nanoclusters (NCs), but the origin of the enhanced emission is not fully understood, yet. In this work, the significant contribution of metal defects on AIE is revealed by engineering the self-assembly process of Cu NCs using ethanol. The presence of ethanol leads to a rapid assembly of NCs into ultrathin nanosheets, promoting the formation of metal defects-rich surface. Detailed studies and computer simulation confirm that the metal defects-rich nanosheets possess increased Cu(I)-to-Cu(0) ratio, which greatly influences ligand-to-metal-metal charge transfer and therewith facilitates the radiative relaxation of excitons. Consequently, the Cu NCs self-assembly nanosheets exhibit obvious emission enhancement.
AB - Aggregation/assembly induced emission (AIE) has been observed for metal nanoclusters (NCs), but the origin of the enhanced emission is not fully understood, yet. In this work, the significant contribution of metal defects on AIE is revealed by engineering the self-assembly process of Cu NCs using ethanol. The presence of ethanol leads to a rapid assembly of NCs into ultrathin nanosheets, promoting the formation of metal defects-rich surface. Detailed studies and computer simulation confirm that the metal defects-rich nanosheets possess increased Cu(I)-to-Cu(0) ratio, which greatly influences ligand-to-metal-metal charge transfer and therewith facilitates the radiative relaxation of excitons. Consequently, the Cu NCs self-assembly nanosheets exhibit obvious emission enhancement.
UR - http://hdl.handle.net/10754/623813
UR - http://pubs.acs.org/doi/full/10.1021/jacs.7b00773
UR - http://www.scopus.com/inward/record.url?scp=85016475321&partnerID=8YFLogxK
U2 - 10.1021/jacs.7b00773
DO - 10.1021/jacs.7b00773
M3 - Article
C2 - 28318238
SN - 0002-7863
VL - 139
SP - 4318
EP - 4321
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 12
ER -