An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R.sup.1 to R.sup.5 represents a cyano group, at least one of R.sup.1 to R.sup.5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R.sup.1 to R.sup.5 represents a hydrogen atom or a substituent.

##STR00001##

The present disclosure provides a laundry care composition having at least one laundry care ingredient and at least one leuco composition conforming to Formula (I):

##STR00001##

wherein Ar.sup.2 and Ar.sup.3 are independently a carbocyclic aryl or heteroaryl, and Ar.sup.1 is selected from the group consisting of: unsubstituted phenyl, electron deficient carbocyclic aryl, and heteroaryl. The present disclosure also provides a method of determining an authentic laundry care composition and test kits for detecting authentic laundry care compositions.

The present disclosure provides a laundry care composition having at least one laundry care ingredient and at least one leuco composition conforming to Formula (I):

##STR00001##

wherein Ar.sup.2 and Ar.sup.3 are independently a carbocyclic aryl or heteroaryl, and Ar.sup.1 is selected from the group consisting of: unsubstituted phenyl, electron deficient carbocyclic aryl, and heteroaryl. The present disclosure also provides a method of determining an authentic laundry care composition and test kits for detecting authentic laundry care compositions.

The present invention relates to a compound of the following formula (I): ##STR00001## The invention also relates to uses thereof as dye or pigment, notably as a luster pigment. The invention relates also to a reflective or photonic or nanophotonic or optoelectronic device comprising a compound of the invention. The invention relates also to a metal-like reflective coating, a metal-like particle or an organic-based metal-like liquid film comprising a compound of the invention.

The present invention relates to a compound of the following formula (I): ##STR00001## The invention also relates to uses thereof as dye or pigment, notably as a luster pigment. The invention relates also to a reflective or photonic or nanophotonic or optoelectronic device comprising a compound of the invention. The invention relates also to a metal-like reflective coating, a metal-like particle or an organic-based metal-like liquid film comprising a compound of the invention.

A vital stain for observation under multiphoton laser microscopy, the vital stain comprising one or more edible dye compounds.

A vital stain for observation under multiphoton laser microscopy, the vital stain comprising one or more edible dye compounds.

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.

The present invention relates to a compound of the following formula (I):

##STR00001##

The invention also relates to uses thereof as dye or pigment, notably as a luster pigment. The invention relates also to a reflective or photonic or nanophotonic or optoelectronic device comprising a compound of the invention. The invention relates also to a metal-like reflective coating, a metal-like particle or an organic-based metal-like liquid film comprising a compound of the invention.