An object of the present invention is to provide a luminescent particle having an emission maximum wavelength in a long wavelength range of 680 nm or longer and exhibiting a high quantum yield; and a compound having an emission maximum wavelength in a long wavelength range of 680 nm or longer and exhibiting a high quantum yield in the particles. According to the present invention, provided is a luminescent particle containing at least one kind of compound represented by Formula (1) (definitions of substituents in the formula are as set forth in the description) and a particle. ##STR00001##

An investigation made by the inventors has found that when the pressure-sensitive adhesive layer having incorporated thereinto tetraazaporphyrin is used as a color correction member, the layer absorbs light having a wavelength around 545 nm, and hence the brightness of a panel including the layer reduces. A color correction member is disclosed that can satisfactorily achieve both of the widening of the color gamut of an image display apparatus and the prevention of a reduction in brightness thereof. A color correction member, which is characterized in that, when a value of an absorption peak at from 580 nm to 610 nm of an absorption spectrum is represented by A.sub.max, and a value of an absorbance at 545 nm of the absorption spectrum is represented by A.sub.545, a ratio A.sub.545/A.sub.max is 0.13 or less.

Provided is a composition with which a film having excellent temporal stability and excellent adhesiveness with a support or the like can be formed. In addition, provided are a film, a near infrared cut filter, a solid image pickup element, an image display device, and an infrared sensor. The composition includes: a near infrared absorbing compound that includes a -conjugated plane having a monocyclic or fused aromatic ring; and a compound A having a weight-average molecular weight of 3000 or higher that has a radically polymerizable ethylenically unsaturated group, in which the compound A includes a repeating unit having a graft chain.

A squarylium compound has high transmittance in a visible wavelength spectrum of light and is configured to selectively absorb light in an infrared/near infrared wavelength spectrum of light.

Disclosed are tethered chromophore compositions comprising a membrane-spanning tether. The compounds can include covalently tethered fluorophore-quencher combinations useful for measuring action potentials and other fast electrical events in cells and tissues.

Disclosed are tethered chromophore compositions comprising a membrane-spanning tether. The compounds can include covalently tethered fluorophore-quencher combinations useful for measuring action potentials and other fast electrical events in cells and tissues.

A dibenzopyrromethene boron chelate compound is represented by the following formula (1): ##STR00001## in which X.sub.1 to X.sub.6 in the above formula (1) are each independently of one another a sulfur atom, a carbon atom having a hydrogen atom, or a carbon atom having a substituent R.sub.0, and the substituent R.sub.0 represents an alkyl group, an alkoxy group, an alkylthio group, an aromatic group, a halogen atom, a hydroxyl group, a mercapto group, a nitro group, a substituted amino group, an unsubstituted amino group, a cyano group, a sulfo group, an acyl group, a sulfamoyl group, an alkylsulfamoyl group, a carbamoyl group, or an alkylcarbamoyl group; and adjacent groups of X.sub.1 to X.sub.6 may be connected to each other to form a ring structure. The compound has an absorption band in a near-infrared light region, and a BO chelate structure due to a thiophene ring.

A dibenzopyrromethene boron chelate compound is represented by the following formula (1): ##STR00001## in which X.sub.1 to X.sub.6 in the above formula (1) are each independently of one another a sulfur atom, a carbon atom having a hydrogen atom, or a carbon atom having a substituent R.sub.0, and the substituent R.sub.0 represents an alkyl group, an alkoxy group, an alkylthio group, an aromatic group, a halogen atom, a hydroxyl group, a mercapto group, a nitro group, a substituted amino group, an unsubstituted amino group, a cyano group, a sulfo group, an acyl group, a sulfamoyl group, an alkylsulfamoyl group, a carbamoyl group, or an alkylcarbamoyl group; and adjacent groups of X.sub.1 to X.sub.6 may be connected to each other to form a ring structure. The compound has an absorption band in a near-infrared light region, and a BO chelate structure due to a thiophene ring.

The present invention is directed, in certain embodiments, to polymerizable near-IR dyes and polymers comprising said dyes as monomeric residues. In other embodiments, the present invention also relates to methods for the preparation of polymerizable near-IR dyes, and to the use of polymerizable near-IR dyes in the preparation of fluorescent polymers.

The present disclosure provides polymerizable luminescent dyes useful for incorporation into polymers. The dyes and the polymers can be used in sensing and imaging applications, for example, to provide accurate and optionally long term measurements of glucose in vivo. The present disclosure also provides sensors including the polymers described herein. The sensors can be implanted into a tissue of a subject and used for long-term or short-term continuous and semi-continuous collection of data of various biochemical analytes, optionally without the use of implantable hardware of any type and/or enzymatic and electrochemical detection methods.