Silver() nanoclusters of carbazole-1,8-bis(acetylide): from visible to near-infrared emission

A feasible synthetic approach to achieve Ag 8 , Ag 16 and Ag 29 silver( i ) nanoclusters is reported by the use of 1,8-diethynyl-9 H -carbazole (H 3 decz) as a directing ligand. The silver( i ) nanoclusters exhibit room-temperature photoluminescence in both solution and solid state. The emission ban...

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Published inChemical communications (Cambridge, England) Vol. 55; no. 44; pp. 6281 - 6284
Main Authors Zhang, Xu, Wang, Jin-Yun, Huang, Ya-Zi, Yang, Ming, Chen, Zhong-Ning
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 28.05.2019
Subjects
Carbazoles
Crystal structure
Crystallography
Dichloromethane
Emission
Format
Nanoclusters
Near infrared radiation
Photoluminescence
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Summary:A feasible synthetic approach to achieve Ag 8 , Ag 16 and Ag 29 silver( i ) nanoclusters is reported by the use of 1,8-diethynyl-9 H -carbazole (H 3 decz) as a directing ligand. The silver( i ) nanoclusters exhibit room-temperature photoluminescence in both solution and solid state. The emission band shows stepwise red-shifts from visible to near-infrared region with the increase of cluster nuclearity following 2 (Ag 8 , λ em = 571 nm) → 3 (Ag 16 , λ em = 651 nm) → 4 (Ag 29 , λ em = 916 and 875sh nm) in fluid CH 2 Cl 2 . High-nuclearity silver( i ) nanoclusters of carbazole-1,8-bis(acetylide) exhibit visible to near-infrared luminescence and gradual emission spectral red-shift with the stepwise increase of cluster nuclearity following Ag 8 → Ag 16 → Ag 29 .
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
10.1039/c9cc02066g
1890201-1890204
Electronic supplementary information (ESI) available: Figures and tables giving additional structural and photophysical results, and X-ray crystallographic files in CIF format for the determination of crystal structures. CCDC
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ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc02066g