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3
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0342426933
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J. Ladik: Nature 202 (1964) 1208.
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Nature
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Ladik, J.1
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9
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2742576911
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22
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0024012365
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K. Shiraishi, A. Oshiyama, N. Shima, T. Nakayama and H. Kamimura: Solid State Comm. 66 (1988) 629.
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26
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85033745760
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2h
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2h.
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27
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85033754932
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note
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In the present calculations, the x axis is settled to the main axis of the polymer backbone chain, and the y axis is settled so that the xy plane is equal to the skeleton plane of the trans-planar form. Therefore, the z axis is toward the out-of-skeleton plane.
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28
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85033749647
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note
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2h symmetry) also produces this type of energy gaps at point X, the origin of the symmetry lowering is different between PIC and such PA: The symmetry lowering in a PIC chain originates from the different-atoms catenation in the backbone, while that in a PA chain is caused by the bond alternation due to the Peierls instability.
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29
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0001626771
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Real polyisocyanate chains having alkyl-group side-chains produce the fundamental absorption edge at about 250 nm. This larger band-edge is caused, because these actual PIC has a slightly helical not planar backbone, which cuts the π and σ electronic delocalization and leads to a wider band gap: A. E. Tonelli; Macromol. 7 (1974) 628, and M. M. Green, C. Anderola, B. Muñoz and M. P. Reidy, J. Am. Chem. Soc. 110 (1988) 4063.
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, pp. 628
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Tonelli, A.E.1
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30
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33845280516
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Real polyisocyanate chains having alkyl-group side-chains produce the fundamental absorption edge at about 250 nm. This larger band-edge is caused, because these actual PIC has a slightly helical not planar backbone, which cuts the π and σ electronic delocalization and leads to a wider band gap: A. E. Tonelli; Macromol. 7 (1974) 628, and M. M. Green, C. Anderola, B. Muñoz and M. P. Reidy, J. Am. Chem. Soc. 110 (1988) 4063.
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J. Am. Chem. Soc.
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Green, M.M.1
Anderola, C.2
Muñoz, B.3
Reidy, M.P.4
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34
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P. Soven: Phys. Rev., 156 (1967) 809; D. W. Taylor: Phys. Rev. 156 (1967) 1017; F. Yonezawa and K. Morigaki: Prog. Theor. Phys. Suppl. 53 (1973) 1.
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Phys. Rev.
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Soven, P.1
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35
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P. Soven: Phys. Rev., 156 (1967) 809; D. W. Taylor: Phys. Rev. 156 (1967) 1017; F. Yonezawa and K. Morigaki: Prog. Theor. Phys. Suppl. 53 (1973) 1.
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Taylor, D.W.1
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