Heterocyclic compounds are provided. In particular, the heteroatom of the heterocyclic compound may be nitrogen. The heterocyclic compounds may demonstrate capacity of stabilizing photoactive compounds. Topical compositions comprising these heterocyclic compounds are also provided. In particular, these topical compositions further comprise photoactive compounds. Methods for stabilizing photoactive compounds are also provided. These methods comprise mixing the photoactive compounds with photostabilizing heterocyclic compounds.

##STR00001##

The invention relates a fluorescent compound of formula I: wherein A is selected from P, P═O and N; .Math.R.sup.1 is a residue comprising an oxygen atom.Math.R.sup.2 is a residue comprising an oxygen atom, or a halogen, .Math.R.sup.3, R.sup.4 and R.sup.5 are alkyls, possibly substituted or a salt or a solvate thereof. The compound is useful as a fluorescent probe sensitive to membrane fluidity and for diagnosing cancer.

##STR00001##

The invention relates a fluorescent compound of formula I: wherein A is selected from P, P═O and N; .Math.R.sup.1 is a residue comprising an oxygen atom.Math.R.sup.2 is a residue comprising an oxygen atom, or a halogen, .Math.R.sup.3, R.sup.4 and R.sup.5 are alkyls, possibly substituted or a salt or a solvate thereof. The compound is useful as a fluorescent probe sensitive to membrane fluidity and for diagnosing cancer.

The present invention provides an intermediate compound for easily producing a compound having an azaperylene skeleton. Another object of the present invention is to provide a method for easily producing a compound having an azaperylene skeleton.

The compound of the present invention is a compound represented by Formula (I), or a compound represented by Formula (II).

##STR00001##

A composition includes two or more near infrared absorbing compounds having an absorption maximum in a wavelength range of 650 to 1000 nm and having a solubility of 0.1 mass % or lower in water at 23° C., in which the two or more near infrared absorbing compounds include a first near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm, and a second near infrared absorbing compound having an absorption maximum in a wavelength range of 650 to 1000 nm which is shorter than the absorption maximum of the first near infrared absorbing compound, and a difference between the absorption maximum of the first near infrared absorbing compound and the absorption maximum of the second near infrared absorbing compound is 1 to 150 nm.

A color material dispersion liquid including a color material, which is a salt-forming compound of an organic dye with a heteropolyoxometalate, a dispersant and a solvent, wherein the organic dye is at least one organic dye selected from the group consisting of a porphyrin dye, a tetraazaporphyrin dye, a phthalocyanine dye and a squarylium dye, and wherein the heteropolyoxometalate is a heteropolyoxometalate which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode.

Provided are a wavelength selective absorption filter including a resin and the following dye A and dye D, each of which has a main absorption wavelength band in a different wavelength range, in which an absorbance Ab (λ) at a wavelength λ nm of this wavelength selective absorption filter satisfies a relationship of the Relational Expression (I) 0.05<Ab (450)/Ab (430)<1.00, as well as a polarizing plate and an organic electroluminescent display device or liquid crystal display device including the wavelength selective absorption filter. The dye A is a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 400 to 430 nm. The dye D is a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 640 to 730 nm.

The present application relates to substituted dyes containing bis-boron fused heterocycles and their uses as fluorescent labels. These compounds may be used as fluorescent labels for nucleotides in nucleic acid sequencing applications.

The invention relates to a vehicle utilizing a LiDAR sensor system for driver assistance systems. A composition consisting of a thermoplastic material based on polycarbonate, polyester carbonate and/or polymethylmethacrylate is used here for forming a cover for the sensor against the surroundings.

The invention relates to a vehicle utilizing a LiDAR sensor system for driver assistance systems. A composition consisting of a thermoplastic material based on polycarbonate, polyester carbonate and/or polymethylmethacrylate is used here for forming a cover for the sensor against the surroundings.