Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I):

##STR00001##

or a stereoisomer, tautomer or salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, L.sup.1, L.sup.2, L.sup.3, L.sup.4, M, m and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.

Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I):

##STR00001##

or a stereoisomer, tautomer or salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, L.sup.1, L.sup.2, L.sup.3, L.sup.4, M, m and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.

Color changeable materials can be incorporated into adhesive materials while maintaining the efficacy and stability of the indicator. The indicators provide simple, reliable, and cost effective detection means for detecting ammonia and carbon dioxide, and may find use in applications such as food packaging and medical applications.

Color changeable materials can be incorporated into adhesive materials while maintaining the efficacy and stability of the indicator. The indicators provide simple, reliable, and cost effective detection means for detecting ammonia and carbon dioxide, and may find use in applications such as food packaging and medical applications.

The invention discloses an environment-friendly leuco dye vegetable oil solvent, prepared from the following components by mass percent: 10-40% of component A, 40-750% of component B and 10-20% of methyl chloride, and the sum of the mass percentage of the above components being 100%. The component A is vegetable oil or vegetable oil methyl ester, and the component B is epoxy vegetable oil or epoxy methyl ester.

The invention discloses an environment-friendly leuco dye vegetable oil solvent, prepared from the following components by mass percent: 10-40% of component A, 40-750% of component B and 10-20% of methyl chloride, and the sum of the mass percentage of the above components being 100%. The component A is vegetable oil or vegetable oil methyl ester, and the component B is epoxy vegetable oil or epoxy methyl ester.

Derivatized malachite green leuco dyes for use in radio-chromic systems are described. The dyes have the following structure:

##STR00001##

in which Ar is a substituted phenyl or thiophene ring in which at least one substitution of the Ar ring is not ortho to the bond between the ring and the linking carbon, and in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from methyl, alkyl, or alkyl halide. The systems include the dyes in conjunction with an activator, e.g., a halogenated activator, and a carrier, e.g., a fluid carrier or an encapsulating polymeric matrix.

Derivatized malachite green leuco dyes for use in radio-chromic systems are described. The dyes have the following structure:

##STR00001##

in which Ar is a substituted phenyl or thiophene ring in which at least one substitution of the Ar ring is not ortho to the bond between the ring and the linking carbon, and in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from methyl, alkyl, or alkyl halide. The systems include the dyes in conjunction with an activator, e.g., a halogenated activator, and a carrier, e.g., a fluid carrier or an encapsulating polymeric matrix.

Derivatized malachite green leuco dyes for use in radio-chromic systems are described. The dyes have the following structure: ##STR00001##
in which Ar is a substituted phenyl or thiophene ring in which at least one substitution of the Ar ring is not ortho to the bond between the ring and the linking carbon, and in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from methyl, alkyl, or alkyl halide. The systems include the dyes in conjunction with an activator, e.g., a halogenated activator, and a carrier, e.g., a fluid carrier or an encapsulating polymeric matrix.

Derivatized malachite green leuco dyes for use in radio-chromic systems are described. The dyes have the following structure: ##STR00001##
in which Ar is a substituted phenyl or thiophene ring in which at least one substitution of the Ar ring is not ortho to the bond between the ring and the linking carbon, and in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently selected from methyl, alkyl, or alkyl halide. The systems include the dyes in conjunction with an activator, e.g., a halogenated activator, and a carrier, e.g., a fluid carrier or an encapsulating polymeric matrix.