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Multilayer second-order nonlinear optical films of head-to-head, mainchain chromophoric polymers

  • US 5,520,968 A
  • Filed: 05/05/1995
  • Issued: 05/28/1996
  • Est. Priority Date: 05/05/1995
  • Status: Expired due to Fees
First Claim
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1. A multilayer polarized film, which comprises at least one bilayer of two monomolecular layers of water-insoluble, head-to-head, mainchain, amphophilic, chromophoric polymers, one monomolecular layer A being formed of a polymer A and the other monomolecular layer B being formed of a polymer B, polymers A and B independently having two or more sequences of bridged chromophore units having the formulas ##STR8## wherein:

  • C and C'"'"' are chromophores of polymers A and B, respectively, wherein each chromophore has an electron accepting end represented by an arrow head, an electron donating end represented by an arrow tail, and a rigid connecting group which contains delocalized H-electrons and which is connected between the electron accepting end and the electron donating end of the chromophore;

    BLA is a hydrophobic (lipophilic) bridging group extending between and attached to the electron accepting ends of two C'"'"' chromophores;

    BLD is a hydrophobic (lipophilic) bridging group, extending between and attached to the electron donating ends of two C chromophores;

    BHA is a hydrophilic bridging group extending between and attached to the electron accepting ends of two C chromophores;

    BHD is a hydrophilic bridging group, extending between and attached to the electron donating ends of two C'"'"' chromophores;

    y1 and y2 are degrees of polymerization of polymers A and B, respectively, which independently range from a minimum value of 2 to a maximum value greater than 300.

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