Characterization of microenvironment polarity and solvent accessibility of polysilsesquioxane xerogels by the fluorescent probe technique

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Poly (1, 4 bis(triethoxysilyl)benzene) (PTESB), a representative of a new type of organic-inorganic hybrid polysilsesquioxane material, was characterized by fluorescence spectroscopy for both microenvironmental polarity and solvent accessibility. A dansyl fluorescent molecule was incorporated into the bulk as well as onto the surface of both PTESB and silica materials. Information about the microenvironment polarity and accessibility of PTESB to various organic solvents was determined and compared to that of silica gel. This study found that both the bulk and surface of PTESB are less polar than that of the silica material. The silica material is accessible to polar solvents and ... continued below

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8 p.

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Shea, K.J.; Zhu, H.D. & Loy, D.A. May 1, 1995.

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  • Shea, K.J.
  • Zhu, H.D. Univ., of California, Irvine, CA (United States). Dept. of Chemistry
  • Loy, D.A. Sandia National Labs., Albuquerque, NM (United States)

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Poly (1, 4 bis(triethoxysilyl)benzene) (PTESB), a representative of a new type of organic-inorganic hybrid polysilsesquioxane material, was characterized by fluorescence spectroscopy for both microenvironmental polarity and solvent accessibility. A dansyl fluorescent molecule was incorporated into the bulk as well as onto the surface of both PTESB and silica materials. Information about the microenvironment polarity and accessibility of PTESB to various organic solvents was determined and compared to that of silica gel. This study found that both the bulk and surface of PTESB are less polar than that of the silica material. The silica material is accessible to polar solvents and water, while YMB is accessible to polar solvents but not to water. The hydrophobicity of PTESB differentiates these new materials from silica gel.

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8 p.

Notes

OSTI as DE95011874

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  • American Chemical Society spring meeting, Anaheim, CA (United States), 2 Feb 1995

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  • Other: DE95011874
  • Report No.: SAND--95-0932C
  • Report No.: CONF-950297--1
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 69431
  • Archival Resource Key: ark:/67531/metadc705850

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • May 1, 1995

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Aug. 23, 2016, 2:55 p.m.

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Shea, K.J.; Zhu, H.D. & Loy, D.A. Characterization of microenvironment polarity and solvent accessibility of polysilsesquioxane xerogels by the fluorescent probe technique, article, May 1, 1995; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc705850/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.