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Volumn 118, Issue 39, 1996, Pages 9377-9386

Iodine as a visible probe for the evaluation of zeolite donor strength

Author keywords

[No Author keywords available]

Indexed keywords

IODINE; ZEOLITE;

EID: 0029855780     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja952112+     Document Type: Article
Times cited : (51)

References (137)
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    • Zhdanov, S.P.1    Kotov, E.I.2
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    • Fraissard, J., Petrakis, L., Eds.; NATO ASI Series C 444; Kluwer Academic: Dordrecht
    • (a) Barthomeuf, D. In Acidity and Basicity of Solids; Fraissard, J., Petrakis, L., Eds.; NATO ASI Series C 444; Kluwer Academic: Dordrecht, 1994; p 181.
    • (1994) Acidity and Basicity of Solids , pp. 181
    • Barthomeuf, D.1
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    • note
    • The terms used for the zeolites used in this study were mostly taken from their structure codes since some zeolites have different names depending on the Si/Al ratio, despite their structures being identical.
  • 89
    • 10244225529 scopus 로고    scopus 로고
    • note
    • +-LTA should be attributed to the smaller pore opening of the zeolite (3 Å) than the kinetic diameter of iodine (4 Å).
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    • note
    • 3 with water followed by measuring the pH of the solution.
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    • Tamres, M.1
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    • note
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    • Such a trend was observed from the solutions of alkyl halides, alcohols, and ethers, except aromatic solvents.
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    • Society of Chemical Industry: London
    • (b) Dempsey, E. In Molecular Sieves; Society of Chemical Industry: London, 1968; p 293.
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    • Rabo, J. A., Ed.; ACS Monograph 171; American Chemical Society: Washington, DC, Chapter 3
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    • Harper Collins College Publications: New York
    • L were Si 2.14, Al 1.71, O 3.65, Li 0.89, Na 0.56, and K 0.45. The values were taken from: Huheey, J. E.; Keiter, E. A.; Keiter, R. L. Inorganic Chemistry, 4th ed.; Harper Collins College Publications: New York, 1993, pp 187ff.
    • (1993) Inorganic Chemistry, 4th Ed.
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    • note
    • The lack of free iodine bands from the highly blue-shifted visible iodine bands in Figures 1, 3, and 4 suggests that the steady-state concentration of free iodine (in the unadsorbed state) is negligible. Accordingly, the residence time of iodine on the oxygen surface is expected to be rather high.
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    • note
    • In general, the absorption intensity of this band was 2-3 times higher than the visible band, as typically shown in the inset of Figure 8, despite the trend of the diffuse reflectance spectroscopy which renders the absorption bands at shorter wavelengths become less pronounced.
  • 131
    • 10244260684 scopus 로고    scopus 로고
    • note
    • The intensities of these bands were usually weaker than those of the visible bands.
  • 132
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    • note
    • These weaker bands showed no consistent trends of shift with the variation of the donor strengths of the framework.
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    • Kostinko, J. A. In Intrazeolite Chemistry; Stucky, G. D., Dwyer, F. G., Eds.; ACS Symp. Ser. 218; American Chemical Society: Washington, DC, 1983; pp 2ff.
    • (1983) Intrazeolite Chemistry
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.