Hydrogels that degrade under appropriate conditions of pH and temperature by virtue of crosslinking compounds that cleave through an elimination reaction are described. The hydrogels may be used for delivery of various agents, such as pharmaceuticals.

Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore. Solution: a chromophore comprising a donor structure D, a -conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.

Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

Hydrogels that degrade under appropriate conditions of pH and temperature by virtue of crosslinking compounds that cleave through an elimination reaction are described. The hydrogels may be used for delivery of various agents, such as pharmaceuticals.

Compositions and articles including host polymers and chromophores and methods of producing the same are provided. In an exemplary embodiment, an article includes a host polymer with a host polymer refractive index. The article also includes a chromophore with a chromophore refractive index that is greater than the host polymer refractive index. The chromophore refractive index changes with changes in an electric field, and the chromophore is dissolved within the host polymer. The article has an article refractive index that is between the host polymer refractive index and the chromophore refractive index.

Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

Hydrogels that degrade under appropriate conditions of pH and temperature by virtue of crosslinking compounds that cleave through an elimination reaction are described. The hydrogels may be used for delivery of various agents, such as pharmaceuticals.

Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

Hydrogels that degrade under appropriate conditions of pH and temperature by virtue of crosslinking compounds that cleave through an elimination reaction are described. The hydrogels may be used for delivery of various agents, such as pharmaceuticals.

Hydrogels that degrade under appropriate conditions of pH and temperature by virtue of crosslinking compounds that cleave through an elimination reaction are described. The hydrogels may be used for delivery of various agents, such as pharmaceuticals.