Thermally stable molecules with large dipole moments and polarizabilities and applications thereof
申请人:California Institute of Technology
公开号:US06402994B1
公开(公告)日:2002-06-11
Disclosed are fused ring bridge, ring-locked dyes that form thermally stable photorefractive compositions. The fused ring bridge structures are &pgr;-conjugated bonds in benzene-, naphthalene- or anthracene-derived fused ring systems that connect donor and acceptor groups. The donor and acceptor groups contribute to a high molecular dipole moment and linear polarizability anisotropy. The polarization characteristics of the dye molecules are stabilized since the bonds in the fused ring bridge are not susceptible to rotation, reducing the opportunity for photoisomerization. The dyes are compatible with polymeric compositions, including thermoplastics. The dyes are electrically neutral but have charge transport, electronic and orientational properties such that upon illumination of a composition containing the dye, the dye facilitates refractive index modulation and a photorefractive effect that can be utilized advantageously in numerous applications such as in optical quality devices and biological imaging.
本发明涉及一种融合环桥、环锁定染料,形成热稳定的光折变组合物。所述融合环桥结构是苯、萘或蒽衍生的融合环系统中的π-共轭键,连接给体和受体基团。给体和受体基团有助于高分子偶极矩和线性偏振各向异性。染料分子的极化特性得到稳定,因为融合环桥中的键不易旋转,减少了光异构化的机会。该染料与聚合物组合物相容,包括热塑性聚合物。该染料是电中性的,但具有电荷传输、电子和取向性质,因此在含有该染料的组合物照明时,该染料促进折射率调制和光折变效应,可在许多应用中得到优越的应用,如光学质量器件和生物成像。