Colorants for metalorganic compounds and their application in electronic display technology

摘要

Colored metalorganic fluids for electrowetting, electrofluidic, and electrophoretic devices are disclosed. The colored fluid can include a polar or nonpolar solvent including silicon and/or germanium and a modified, oligomeric, or polymeric dye. The dye includes a chromophore attached to a low molecular weight group with molecular weight 10 to 800 or an oligomeric or polymeric chain, which includes silicon and/or germanium. The dye has a molecular weight from 100 to 100,000, solubility in the solvent of at least 5% wt at 25° C., and a dynamic viscosity from 0.5 cPs to 2,000 cPs at 25° C. If the solvent is polar, the fluid has a conductivity from about 0.01 pS/cm to 3000 pS/cm, a surface tension of 15 dynes/cm to 90 dynes/cm at 25° C., and a total content of monatomic ions with radii smaller than 2.0 A and polyatomic ions with radii smaller than 1.45 A less than 500 ppm.

主权项

1. A colored metalorganic fluid comprising:
at least one polar or non-polar solvent and at least one modified, oligomeric, polymeric dye in the solvent, the dye having at least one chromophore attached to a low molecular weight group with molecular weight up to 800 or an oligomeric or polymeric chain, wherein the low molecular weight group or the oligomeric or polymeric chain includes silicon or germanium, the dye further having a total molecular weight from 100 to 100,000, solubility in the solvent of at least 5% by wt at 25° C., and a dynamic viscosity from 0.1 cPs to 2,000 cPs at 25° C., and wherein, if the solvent is the polar solvent, the colored metalorganic fluid has a conductivity from about 0.01 μS/cm to 3000 μS/cm, a surface tension of 15 dynes/cm to 90 dynes/cm at 25° C., and a total content of monatomic ions with radii smaller than 2.0 Å and polyatomic ions with radii smaller than 1.45 Å less than 500 ppm, and, if the solvent is the non-polar solvent, the colored metalorganic fluid has a conductivity less than 5×10−3 μS/cm and a surface tension of 10 dynes/cm to 40 dynes/com at 25° C.