共 61 条
Controlling Aggregation-Induced Emission in Bimetallic Gold-Copper Nanoclusters via Surface Motif Engineering
被引:34
作者:

Chakraborty, Sikta
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机构:
Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India

Bain, Dipankar
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机构:
Inst Nano Sci & Technol, Mohali 140306, India Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India

Maity, Subarna
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Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India

Kolay, Sarita
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Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India

Patra, Amitava
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h-index: 0
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Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India
Inst Nano Sci & Technol, Mohali 140306, India Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India
机构:
[1] Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, India
[2] Inst Nano Sci & Technol, Mohali 140306, India
关键词:
AU(I)-THIOLATE COMPLEXES;
METAL NANOCLUSTERS;
ELECTRON-TRANSFER;
CLUSTERS;
SILVER;
LUMINESCENCE;
NANOPARTICLES;
PH;
SPECTROSCOPY;
INSIGHTS;
D O I:
10.1021/acs.jpcc.1c10237
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Aggregation-induced emission (AIE) has been significantly explored to enhance luminescence properties. Here, we synthesized bimetallic AuCu nanoclusters (NCs) and studied their AIE by reconstructing the surface motif from -SAu(I)S Au(I)S to -SAu(I)SCu(I)S, as evident from X-ray photoelectron spectroscopy (XPS) and microscopy studies. A significant blue shift in the emission band of Au NCs is observed with the change of the Au/Cu molar ratio. We observed enormous emission enhancement with decreasing temperature due to suppression of the intramolecular motion of surface ligands. A 200-fold emission enhancement occurs due to the aggregation of ultrasmall-sized AuCu NCs in a less polar medium of the waterethanol mixture. An increase in the radiative rate supports the effect of the Au(I)Cu(I) metallophilic interaction. A decrease in the nonradiative rate confirms the restriction of ligand motions in the aggregated state. Metal cluster-based AIE-type materials pave the way to design highly luminescent materials for potential applications in sensing, biolabeling, light-emitting diodes (LEDs), and other fields.
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页码:2896 / 2904
页数:9
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