A stable 2,2-bibenzo[d]imidazolidene compound is provided. The 2,2-bibenzo[d]imidazolidene compound is expressed by the following General Formula (1). In General Formula (1), Ar.sub.1 to Ar.sub.8 each represent a substituted or unsubstituted condensed ring. R.sub.1 to R.sub.8 each represent a hydrogen atom or a substituent. ##STR00001##

The invention provides a novel class of cyanine dyes that are functionalized with sulfonic acid groups and a linker moiety that facilitates their conjugation to other species and substituent groups which increase the water-solubility, and optimize the optical properties of the dyes. Also provided are conjugates of the dyes, methods of using the dyes and their conjugates and kits including the dyes and their conjugates.

The present disclosure relates to new compounds and their use as fluorescent labels. The compounds may be used as fluorescent labels for nucleotides in nucleic acid sequencing applications.

To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm:

##STR00001##

In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.

An optical filter includes an absorption layer containing a near-infrared absorbing dye with an absorption characteristic in dichloromethane satisfying (i-1) to (i-3). (i-1) In an absorption spectrum of a wavelength of 400 to 800 nm, there is a maximum absorption wavelength .sub.max in 670 to 730 nm. (i-2) Between a maximum absorption coefficient .sub.A of light with a wavelength of 430 to 550 nm and a maximum absorption coefficient .sub.B of light with a wavelength of 670 to 730 nm, the following relational expression: .sub.B/.sub.A65 is established. (i-3) In a spectral transmittance curve, the difference between a wavelength .sub.80 with which the transmittance becomes 80% on a shorter wavelength side than the maximum absorption wavelength with the transmittance at the maximum absorption wavelength .sub.max set to 10% and the maximum absorption wavelength .sub.max is 65 nm or less.

A color filter substrate is disclosed, including a substrate, a black matrix disposed on the substrate and multiple color resist blocks separated by the black matrix and disposed on the substrate. Each color resist block is filled with a color resist material, the color resist material includes pigment molecules, including at least one photosensitive substituent. A liquid crystal display device having the same is also disclosed. Utilizing an UV irradiation step in the CF process, the pigment molecules are aligned directionally, which can increase the transmittance of the color filter substrate, the utilization rate of the backlight, and decrease the power consumption. Under the same display brightness, the thickness of the color filter substrate can be decreased; the pigment molecules aligned directionally can make an emitting light to be along a same direction to reduce the light interference between adjacent sub-pixels having different colors to greatly decrease the color shift.

Provided are a thermal fusion-type lithographic printing plate precursor in which the visibility is excellent, ablation during laser exposure is suppressed, and the contamination of dampening water and printing ink during on-machine development is suppressed by a lithographic printing plate precursor having a support and an image-recording layer, in which the image-recording layer is capable of forming an image by infrared laser exposure, a non-exposed portion of the image-recording layer is removable by at least one of dampening water and printing ink on a printer, and the image-recording layer contains (1) a color developing system in which a hue change generated by infrared laser exposure is a/b0.6 and (2) 70% by mass or more of a thermoplastic polymer particle with respect to a solid content of the image-recording layer and a plate-making method in which the thermal fusion-type lithographic printing plate precursor is used.

To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: ##STR00001##
In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.

An imaging device, comprising: an infrared light absorption layer including a cyanine dye represented by Chemical Formula (A) below: wherein R.sub.1 and R.sub.2 are selected from the group consisting of: a chain alkyl group, a cyclic alkyl group, a phenyl group, and a benzyl group; wherein the chain alkyl group and the cyclic alkyl group including at least one group member selected from the group consisting of: 1) a first group having one or more hydrogen atoms in a first alkyl group substituted with at least one functional group selected from the group consisting of: a halogen atom, an alkoxy group, an alkanoloxy group, an amino group, a thiol group, and a mercapto group; 2) a second group having at least one reactive group selected from the group consisting of: a vinyl group, an acrylic group, a carbonyl group, a carboxyl group, an alkenyl group, an alkenyloxy group, an alkoxycarbonyl group, a nitrile group, a carboxyl group, a carbonyl group, a sulfonyl group, a sulfamoyl group, a carbamoyl group, a benzoyloxy group, and a cyano group, wherein the reactive group is any one of introduced at a terminal alkyl group of at least one of the chain alkyl group and the cyclic alkyl group and positioned two or more carbon atoms away from an indoline ring; 3) an unsubstituted chain alkyl group; and 4) an unsubstituted cyclic alkyl group; and wherein X.sup. represents an anion.

An optical filter includes an absorption layer containing a near-infrared absorbing dye with an absorption characteristic in dichloromethane satisfying (i-1) to (i-3). (i-1) In an absorption spectrum of a wavelength of 400 to 800 nm, there is a maximum absorption wavelength .sub.max in 670 to 730 nm. (i-2) Between a maximum absorption coefficient .sub.A of light with a wavelength of 430 to 550 nm and a maximum absorption coefficient .sub.B of light with a wavelength of 670 to 730 nm, the following relational expression: .sub.B/.sub.A65 is established. (i-3) In a spectral transmittance curve, the difference between a wavelength .sub.80 with which the transmittance becomes 80% on a shorter wavelength side than the maximum absorption wavelength with the transmittance at the maximum absorption wavelength .sub.max set to 10% and the maximum absorption wavelength .sub.max is 65 nm or less.