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crystals. An example of one of these carbazole-phenoxy methacrylates is shown below.243

H N

O

N

  • O

    (CH2)2 O

Gaudiana, et al., produced high refractive index carbazole based methacrylates and acrylates for optical applications, where the pendant carbazole groups were halogenated (Figure 2.20). Refractive indices ranged from 1.67 to 1.77.244 Copolymers of carbazole based methacrylates and acrylates have also found potential use in contact lens and intraocular lens applications.245

O

O

Br

O (CH2)m N

Br

I

O (CH2)m N

I

Br

Br

I

I

Figure 2.20 Examples of Methacrylates with Halogenated Carbazole Groups246

243 244 245 246

Urya, T.; Yozo, K., (Nippon) JP Patent, 1996, 8092324. Gaudiana, R.; Minns, R.; Rogers, H., (Polaroid) US Patent, 1992, 5,132,430. Makker, H.; Liao, X.; Weinschenk, J., (Allergan) WO Patent, 2000, 00/26698. Gaudiana, R.; Minns, R.; Rogers, H., Op. Cit.

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