메뉴 건너뛰기




Volumn 130, Issue 37, 2008, Pages 12279-12281

Reaction chemistry and ligand exchange at cadmium-selenide nanocrystal surfaces

Author keywords

[No Author keywords available]

Indexed keywords

CADMIUM; NANOCRYSTAL; SELENIDE;

EID: 51949105694     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja804414f     Document Type: Article
Times cited : (349)

References (31)
  • 12
    • 51949108417 scopus 로고    scopus 로고
    • Assuming this resonance corresponds to the acidic hydrogen of an octadecylphosphonic acid ligand bound to the nanocrystal accounts for only one hydrogen per 11.5 ± 2% of the octadecylphosphonate moieties. Additional work is required to unequivocally assign this resonance
    • Assuming this resonance corresponds to the acidic hydrogen of an octadecylphosphonic acid ligand bound to the nanocrystal accounts for only one hydrogen per 11.5 ± 2% of the octadecylphosphonate moieties. Additional work is required to unequivocally assign this resonance.
  • 14
    • 51949111165 scopus 로고    scopus 로고
    • 1/2 > 12 hr).
    • 1/2 > 12 hr).
  • 15
    • 51949097075 scopus 로고    scopus 로고
    • The relative integrals of the methylene and methyl resonances (1:17) from the remaining aliphatic chains showed that they are composed of octadecyl chains
    • The relative integrals of the methylene and methyl resonances (1:17) from the remaining aliphatic chains showed that they are composed of octadecyl chains.
  • 16
    • 51949087741 scopus 로고    scopus 로고
    • Adding 8 to our nanocrystals resulted in a ∼5 nm shift of the fluorescence maximum.
    • Adding 8 to our nanocrystals resulted in a ∼5 nm shift of the fluorescence maximum.
  • 17
    • 51949084167 scopus 로고    scopus 로고
    • 1H NMR spectroscopy. Addition of excess chlorotrimethylsilane results in etching of the CdSe particles, as evidenced by a blue-shifting of their absorption and fluorescence spectra, as well as a decrease in quantum yield of the CdSe/ZnS core-shell samples.
    • 1H NMR spectroscopy. Addition of excess chlorotrimethylsilane results in etching of the CdSe particles, as evidenced by a blue-shifting of their absorption and fluorescence spectra, as well as a decrease in quantum yield of the CdSe/ZnS core-shell samples.
  • 21
    • 51949101781 scopus 로고    scopus 로고
    • A small concentration (<10%) of free surfactant ligands appeared upon the addition of 5, that rapidly reached equilibrium. Surprisingly, heating this sample to 100°C for 16 h made little difference to these spectra. Further experiments to probe this reaction are underway and will be reported elsewhere.
    • A small concentration (<10%) of free surfactant ligands appeared upon the addition of 5, that rapidly reached equilibrium. Surprisingly, heating this sample to 100°C for 16 h made little difference to these spectra. Further experiments to probe this reaction are underway and will be reported elsewhere.
  • 22
    • 51949100453 scopus 로고    scopus 로고
    • The important resonance structures of the dianionic form of octadecylphosphonic acid anhydride show that this moluecule, unlike 6, is not chiral. Similarily, its protonated form shows a single line spectrum as a result of rapid hydrogen ion exchange between the P-OH and P=O functionalities see Supporting Information, Similar chemical shifts were reported in ref 3a
    • The important resonance structures of the dianionic form of octadecylphosphonic acid anhydride show that this moluecule, unlike 6, is not chiral. Similarily, its protonated form shows a single line spectrum as a result of rapid hydrogen ion exchange between the P-OH and P=O functionalities (see Supporting Information). Similar chemical shifts were reported in ref 3a.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.