Structural Analysis of Bis(1,2-benzoquinonedioximato)platinum(II) Polymorphs Formed Epitaxially on Alkali Halides
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Accession number;05A0303235
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| Title;Structural Analysis of Bis(1,2-benzoquinonedioximato)platinum(II) Polymorphs Formed Epitaxially on Alkali Halides |
| Author;
YOSHIDA K
(Kyoto Univ., Kyoto, Jpn)
YAJI T
(Kyoto Univ., Kyoto, Jpn)
KOSHINO M
(Kyoto Univ., Kyoto, Jpn)
ISODA S
(Kyoto Univ., Kyoto, Jpn)
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Journal Title;Jpn J Appl Phys Part 1
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Journal Code:G0520B
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ISSN:0021-4922
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VOL.44;NO.1B;PAGE.491-494(2005)
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| Figure&Table&Reference;FIG.8, TBL.3, REF.9 |
| Pub. Country;Japan |
| Language;English |
| Abstract;We analyzed the crystal structures of bis(1,2-benzoquinonedioximato)platinum(II), (Pt(bqd)2), thin films fabricated by vacuum deposition on the (001) surfaces of NaCl, KCl, KBr and KI substrates at room temperature. Pt(bqd)2 thin films exhibited some polymorphs. These structures and crystallographic orientations were studied by transmission electron microscopy (TEM). On NaCl, KCl and KBr, Pt(bqd)2 grows in the .BETA.-form; unit cell dimensions are a=2.57 nm, b=0.66 nm and c=0.37 nm. The .BETA.-polymorph transforms into the ordinary orthorhombic .ALPHA.-form by heating at different rates depending on the substrate. The instability of the .BETA.-form was influenced by lattice-matching between the .BETA.-form and substrate used. On KI, Pt(bqd)2 grows as the polymorphic tetragonal form (.GAMMA.-form: a=1.42 nm and c=0.656 nm). From the result of high-resolution TEM observations, many defects or domain boundaries in this film were observed, which are related to the structural change during the growth. (author abst.) |
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