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Volumn 129, Issue 2, 2007, Pages 305-312

Mechanistic study of precursor evolution in colloidal group II-VI semiconductor nanocrystal synthesis

Author keywords

[No Author keywords available]

Indexed keywords

OLEIC ACID ANHYDRIDES; SEMICONDUCTOR NANOCRYSTAL SYNTHESIS; TRIALKYLPHOSPHINE OXIDE; TRIALKYLPHOSPHINE SELENIDES;

EID: 33846191609     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0656696     Document Type: Article
Times cited : (383)

References (69)
  • 30
    • 33846242017 scopus 로고    scopus 로고
    • 31P NMR spectrum (Supporting Information Figure S1). The same batch of TOPO was used whenever two experimental results were to be compared.
    • 31P NMR spectrum (Supporting Information Figure S1). The same batch of TOPO was used whenever two experimental results were to be compared.
  • 36
    • 33846259227 scopus 로고    scopus 로고
    • This was prepared by adding CdMe2 to a CDCl3 solution of n-octylphosphonic acid at room temperature in a glovebox
    • 3 solution of n-octylphosphonic acid at room temperature in a glovebox.
  • 37
    • 33846242439 scopus 로고    scopus 로고
    • 13C NMR.
    • 13C NMR.
  • 41
    • 33846222695 scopus 로고    scopus 로고
    • 2 was used as the cadmium precursor in the CdSe synthesis in TOPO (Figure S11, Supporting Information).
    • 2 was used as the cadmium precursor in the CdSe synthesis in TOPO (Figure S11, Supporting Information).
  • 45
    • 33846242896 scopus 로고    scopus 로고
    • The slow hydrolysis rate also suggests that most of the added water does not dissolve in the reaction mixture at 260-290 °C
    • The slow hydrolysis rate also suggests that most of the added water does not dissolve in the reaction mixture at 260-290 °C.
  • 46
    • 33846224183 scopus 로고    scopus 로고
    • Cd-ODPA showed increased reactivity toward TOPS cleavage with added water, suggesting that water may contribute to the cleavage mechanism in that case. See Figure S12, Supporting Information.
    • Cd-ODPA showed increased reactivity toward TOPS cleavage with added water, suggesting that water may contribute to the cleavage mechanism in that case. See Figure S12, Supporting Information.
  • 53
    • 33846234571 scopus 로고    scopus 로고
    • Whether the nucleophile is free in solution as shown in Figure 8 or bound to cadmium is unknown. The transition structure drawn was chosen for the sake of simplicity.
    • Whether the nucleophile is free in solution as shown in Figure 8 or bound to cadmium is unknown. The transition structure drawn was chosen for the sake of simplicity.
  • 54
    • 0037044046 scopus 로고    scopus 로고
    • Quantitation of the CdSe nanocrystal produced upon TOPSe cleavage in TOPO/Cd-ODPA by monitoring the size-independent particle absorption at 350 nm Leatherdale, C. A, Woo, W. K, Mikulec, F. V, Bawendi, M. G. J. Phys. Chem. B 2002, 106, 7619-7622
    • Quantitation of the CdSe nanocrystal produced upon TOPSe cleavage in TOPO/Cd-ODPA by monitoring the size-independent particle absorption at 350 nm (Leatherdale, C. A.; Woo, W. K.; Mikulec, F. V.; Bawendi, M. G. J. Phys. Chem. B 2002, 106, 7619-7622)
  • 55
    • 33846239910 scopus 로고    scopus 로고
    • 31P NMR spectra of reaction aliquots showed the extent of TOPSe cleavage matches the appearance of CdSe: Owen, J. S.; Liu, H. T.; Alivisatos, A. P. Manuscript in preparation.
    • 31P NMR spectra of reaction aliquots showed the extent of TOPSe cleavage matches the appearance of CdSe: Owen, J. S.; Liu, H. T.; Alivisatos, A. P. Manuscript in preparation.
  • 56
    • 33846235786 scopus 로고    scopus 로고
    • Other studies have also shown that phosphine sulfide and selenide could be converted to phosphine oxide by organic Lewis acid like trifluoroacetic acid anhydride. See ref 57
    • Other studies have also shown that phosphine sulfide and selenide could be converted to phosphine oxide by organic Lewis acid like trifluoroacetic acid anhydride. See ref 57.
  • 60
    • 33846230427 scopus 로고    scopus 로고
    • Studies in our laboratory to identify the dependence of the reaction kinetics on phosphonic acid are under way: Manuscript in preparation
    • Studies in our laboratory to identify the dependence of the reaction kinetics on phosphonic acid are under way: Owen, J. S.; Liu, H. T.; Alivisatos, A. P. Manuscript in preparation.
    • Owen, J.S.1    Liu, H.T.2    Alivisatos, A.P.3
  • 62
    • 33846208219 scopus 로고    scopus 로고
    • We note that a cadmium center coordinated by the more acidic anhydride of ODPA is likely to bind and activate TOPSe to a greater extent, but may also be a weaker nucleophile in the cleavage step
    • We note that a cadmium center coordinated by the more acidic anhydride of ODPA is likely to bind and activate TOPSe to a greater extent, but may also be a weaker nucleophile in the cleavage step.
  • 64
    • 33846185813 scopus 로고    scopus 로고
    • We note that, in the absence of acid surfactant, some precursors, such as phosphine telluride, could react differently. See refs 64-66
    • We note that, in the absence of acid surfactant, some precursors, such as phosphine telluride, could react differently. See refs 64-66.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.