Organic perylene diimide-based compounds are provided. Methods of producing the organic compounds is also provided as well as methods of their use including, among other things, their use as organic semiconductor materials.

A reverse photochromic compound of the related art has difficulty in sensing light with a wavelength of 600 nm or greater in a visible light region which has been used for medical applications. Therefore, an object of the present invention is to provide a reverse photochromic compound and a polymer which have a high sensitivity to light having a wavelength of 600 nm or greater.

The present invention relates to a compound and the like represented by the following general formula (1).

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(In the formula, R.sub.1 and R.sub.4 each independently represent a hydrogen atom or the like, R.sub.2, R.sub.3, and R.sub.5 each independently represent an alkyl group or the like, R.sub.6 represents a group having a polymerizable unsaturated group, a carboxy group, or an alkoxycarbonyl group, R.sub.31 and R.sub.32 each independently represent an alkoxy group or the like, R.sub.33 and R.sub.34 each independently represent a hydrogen atom or the like, Y.sub.1 represents an oxygen atom or a sulfur atom, An.sup. represents an anion, n.sub.1 to n.sub.3 represent a specific integer, and R.sub.1 and R.sub.2, R.sub.3 and R.sub.4, and/or R.sub.33 and R.sub.34 may form an alkylene group.)

A contact lens includes at least one color changeable region, wherein the color changeable region includes at least one photoluminescence material. When a wavelength of the photoluminescence material having a maximum radiation intensity is WEmMx, an average transmittance in a wavelength range of 400 nm-700 nm of the color changeable region is T4070, a size of a total area of the color changeable region is AC, and a size of a total area of the contact lens is AL, certain conditions relating to WEmMx, T4070 and AC/AL are satisfied.

The present disclosure relates to chemical dyes useful for staining and imaging of cells. In particular, the disclosure relates to compound of Formula I, method of preparation thereof, and it's use as a fluorescent probe for staining and/or imaging mitochondria in cells, tissues or animals, resulting in a range of applications including, but not limiting, to sensing local ordering or viscosity of mitochondria, tracking mitochondrial mobility, comparing & evaluating mitochondrial function, local ordering, microviscosity and dynamics. Said dyes have additional advantages including, but not limiting, to low toxicity, longer shelf-life, generate little or no reactive species upon long term light irradiation and do not perturb the functionality of the mitochondria in cells compared to prior art dyes.

##STR00001##

The invention relates to cationic direct dyes of the formula I (1), wherein m and n are independently from each other 0 or 1, D is an aromatic or a cationic heteroaromatic group, which are further specified, K is an aromatic or heteroaromatic group, E.sub.1 and E.sub.2 are independently from each other CH or N, An is an anion and a is a number from 1 to 6 and R.sub.1 and R.sub.2 are independently from each other and further specified. The compounds show washfastness at hair-dying. ##STR00001##

The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow to orange colourings with improved light fastness and improved thermal stability.

The present invention relates to a coloring resin composition exhibiting pleochroism comprising 100 parts by weight of a transparent thermoplastic resin (A); 0.01 to 0.03 parts by weight of a dye for coloring a resin (B) which is one selected from the group consisting of an azo-based dye (b1), an anthraquinone-based dye (b2), and a methine dye (b3); and 0.1 to 0.3 parts by weight of a functional black dye (C) obtained by mixing an anthraquinone-based dye (c1) and a perinone-based dye (c2). A resin molded article manufactured by the coloring resin composition exhibiting pleochroism of the present invention is characterized by exhibiting different colors of light according to thicknesses although the resin molded article is irradiated with light sources in a single wavelength.

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.

Provided herein are aggregation-induced emission luminogens useful for imaging and/or detecting cancer cells and dynamically monitoring the viability of cancer cells and methods of use and preparation thereof.

An organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one -conjugated unit is described. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC).