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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 6
BKCSDE 21(6)
June 20, 2000 

Organic-Inorganic Nano-Composite of PMMA-Forsterite Doped with EU+3
Dong Con Park, Jin Kang, Hea Young Kwon
Drying-step in sol-gel processing was bypassed by exchanging alcoholic solvent in forsterite alcogel directly with MMA. By in-situ polymerization of the MMA, organic-inorganic nano-composite of PMMA-forsterite was prepared. As porous nature of inorganic networks in the gel was preserved and fixated in the composite, spherical morphology of PMMA was resulted. The PMMA-forsterite composite was optically transparent, machinable,mechanically sustainable, and thermally more stable than pristine PMMA. When doped with Eu+3,inorganic moiety in the composite provided site environment that is very different from that in pristine PMMA. Prominent 5Do -> 7Fo transition at 578 nm, broken degeneracy in 5Do -> 7F1 and 5D0 ->7F2 transitions suggested that Eu+3 was exclusively doped in the inorganic moiety of the composite, which had lower symmetry than the organic counterpart.
604 - 610
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