Water-soluble photoactive polymers, included polymer tandem dyes, as described as well as methods for their preparation and use. The photoactive polymers can be prepared by direct modification of core polymers (e.g., violet excitable polymers) with dyes or other functional groups. Methods of detecting analytes using the polymers are also described.

In an aspect, an artificial selenomelanin material comprises: one or more selenomelanin polymers; wherein the one or more selenomelanin polymers comprise a plurality of covalently bonded selenomelanin base units; and wherein a chemical formula of each of the one or more selenomelanin base units comprises at least one selenium atom. Optionally, each selenomelanin polymer is a pheomelanin. Preferably, the chemical formula of each of the one or more selenomelanin base units comprises at least one covalent bond with each of the at least one selenium atom.

Compounds useful as fluorescent or colored dyes are disclosed. In some embodiments, 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.sub.2, L.sub.3, L.sup.4, M.sup.1, M.sup.2, m, and n are as defined herein. Methods associated with preparation and use of such compounds is also provided.

Compounds useful as fluorescent or colored dyes are disclosed. In some embodiments, 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.sub.2, L.sub.3, L.sup.4, M.sup.1, M.sup.2, m, and n are as defined herein. Methods associated with preparation and use of such compounds is also provided.

The invention relates to a compound chosen from the compounds of formulae (I) and (II), the leucoforms thereof, the optical and geometrical isomers thereof and the tautomers thereof, and also the addition salts thereof with an acid or a base, and the solvates thereof. The invention also relates to the use of these particular compounds for dyeing keratin fibres.

##STR00001##

Compounds useful as fluorescent or colored dyes are disclosed. The compounds have the following structure (I):

##STR00001##

including stereoisomers, salts and tautomers thereof, wherein R.sup.1, R.sup.2, R.sup.3, L.sup.1, L.sup.2, L.sup.3, L.sup.4, L.sup.5, L.sup.6, M.sup.1, M.sup.2, A, q, w and n are as defined herein. Methods associated with preparation and use of such compounds are also provided.

The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types of pigments in a non-aqueous solvent and also provides a pigment composition, a pigment dispersion, and a toner, each of which has a preferable coloring power. The compound includes a polymer which has a monomer unit having a specific structure and also includes a specific partial structure.

A quencher is disclosed having a compound represented by the following general formula (1):

##STR00001##

wherein R.sub.5 each independently represent a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an amino group having a substituent or not having a substituent, a hydroxy group, an aryl group, an aryloxy group, or an arylalkyl group; R.sub.6 represents a group having a polymerizable unsaturated group, a hydroxy group, or the like; Y.sub.1 represents an oxygen atom, or the like; An.sup.− represents an anion; Ar.sub.1 represents a specific ring structure; * and ** represent binding positions; Ar.sub.2 represents a benzene ring, a naphthalene ring, or an anthracene ring; n.sub.1 represents a specific integer;
and the following structure (1-10) in the general formula (1) is an asymmetric structure;

##STR00002##

(wherein R.sub.5, Y.sub.1, Ar.sub.1, Ar.sub.2, n.sub.1, * and ** are the same as described above.).

There is provided an electroactive material having Formula I

##STR00001##

wherein: Q is the same or different at each occurrence and can be O, S, Se, Te, NR, SO, SO.sub.2, or SiR.sub.3; R is the same or different at each occurrence and can be hydrogen, alkyl, aryl, alkenyl, or alkynyl; and R.sup.1 through R.sup.6 are the same or different and can be hydrogen, alkyl, aryl, halogen, hydroxyl, aryloxy, alkoxy, alkenyl, alkynyl, amino, alkylthio, phosphino, silyl, —COR, —COOR, —PO.sub.3R.sub.2, —OPO.sub.3R.sub.2, or CN.

Provided herein are compounds that are able to bind metal ions (e.g., free metal ions or metal ions bound to low affinity ligands) in a sample or subject. Also provided herein are methods of using the compounds for chelating metal ions and for the treatment of diseases associated with abnormal levels of metal ions. Methods of preparing the compounds and pharmaceutical compositions are also provided.