2017年5月23日
Quantitative Solid-State NMR Study on Ligand-Surface Interaction in Cysteine-Capped CdSe Magic-Sized Clusters
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
- ,
- ,
- 巻
- 8
- 号
- 12
- 開始ページ
- 2555
- 終了ページ
- 2559
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.jpclett.7b00909
- 出版者・発行元
- AMER CHEMICAL SOC
Ligand-surface interaction of semiconductor nanoparticles (NPs) controls their optoelectronic properties, and thus examination of the interaction is essential for the nanoelectronic applications of NPs. Herein, solid-state nuclear magnetic resonance (NMR) is performed to unravel the ligand-surface interaction in cysteine-capped CdSe magic-sized clusters. N-15-Cd-113 through-bond J-filtered NMR directly shows the presence of the nitrogen-cadmium chemical bond for the first time and indicates that similar to 43% of the amines form the chemical bond. N-15-Cd-113 through-space dipolar-correlated NMR reveals that similar to 54% of the amines locate nearby the surface cadmium with the average nitrogen-cadmium distance of 0.247 nm. The average distance is comparable with that estimated by J-filtered NMR. The difference of the two ratios (similar to 11%) proposes that some amines locate on the surface without forming the chemical bond, and these amines affect the relatively long observed distance in the dipolar-based experiment. Our study shows effectiveness of solid-state NMR for investigation of the ligand-surface interactions of NPs.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.jpclett.7b00909
- ISSN : 1948-7185
- Web of Science ID : WOS:000403741800002