Linked azo dyes
AssigneeBASF SE
InventorsStefan Beckmann, Karl-Heinz Etzbach, Karl Siemensmeyer, Ruediger Sens
Life of this patent
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Abstract
Azo dyes of the formula W(--X--Y--Chr).sub.n, where n is 2 to 6, y is C.sub.1 -C.sub.6 -alkylene, Chr is the radical of a mono- or polyazo dye, X is a radical of the formula CO--O or O--CO and W is an n-valent radical which is derived from an unsubstituted or substituted C.sub.2 -C.sub.20 -alkane, an unsubstituted or substituted C.sub.4 -C.sub.7 -cycloalkane, an unsubstituted or substituted benzene or an unsubstituted or substituted naphthalene, or, if n is 4, is also silicon, and their use in nonlinear optics or for dyeing or printing textile materials are described.
Claims3
A process for nonlinearly varying optical radiation which comprises the step of interacting the optical radiation with an azo dye of the Formula I and recovering the nonlinearly varied optical radiation:
- W(--X--Y--Chr).sub.n (I),
- where
- n is 2 to 6,
- Y is C.sub.1 -C.sub.6 -alkylene,
- Chr is a radical which is derived from a mono- or poly-azo dye and which is bonded to the radical Y via a chemical bond, CO--O, oxygen, sulfur, imino or C.sub.1 -C.sub.4 -alkylimino,
- X is a radical of the formula CO--O or O--CO and
- W is an n-valent radical which is derived from an unsubstituted or substituted C.sub.2 -C.sub.20 -alkane, an unsubstituted or substituted C.sub.4 -C.sub.7 -cycloalkane, an unsubstituted or substituted benzene or an unsubstituted or substituted naphthalene, or, if n is 4, is also silicon.
A process for modulating optical radiation which comprises interacting the optical radiation with an azo dye of the Formula I and recovering the modulated optical radiation:
- W(--X--Y--Chr).sub.n (I),
- where
- n is 2 to 6,
- Y is C.sub.1 -C.sub.6 -alkylene,
- Chr is a radical which is derived from a mono- or poly-axo dye and which is bonded to the radical Y via a chemical bond, CO--O, oxygen, sulfur, imino or C.sub.1 -C.sub.4 -alkylimino.
- X is a radical of the formula CO--O or O--CO and
- W is an n-valent radical which is derived from an unsubstituted or substituted C.sub.2 -C.sub.20 -alkane, an unsubstituted or substituted C.sub.4 -C.sub.7 -cycloalkane, an unsubstituted or substituted benzene or an unsubstituted or substituted naphthalenes, or, if n is 4, is also silicon.
A nonlinear optical device comprising as an active nonlinear element an azo dye of the formula I:
- W(--X--Y-Chr).sub.n (I),
- where
- n is 2 to 6,
- Y is C.sub.1 -C.sub.6 -alkylene,
- Chr is a radical which is derived from a mono- or poly-axo dye and which is bonded to the radical Y via a chemical bond, CO--O, oxygen, sulfur, imino or C.sub.1 -C.sub.4 -alkylimino,
- X is a radical of the formula CO--O or O--CO and
- W is an n-valent radical which is derived from an unsubstituted or substituted C.sub.2 -C.sub.20 -alkane, an unsubstituted or substituted C.sub.4 -C.sub.7 -cycloalkane, an unsubstituted or substituted benzene or an unsubstituted or substituted naphthalene, or, if n is 4, is also silicon.
Dependencies are inferred from the claim text.