An organic light-emitting element which emits delayed fluorescence comprising specifically substituted 1,2,4-triazole derivatives, 1,2,4-oxadiazole derivatives or 1,2,4-thiadiazole derivatives in the light-emitting layer, a light-emitting layer comprising the specifically substituted 1,2,4-triazole derivatives, 1,2,4-oxadiazole derivatives or 1,2,4-thiadiazole derivatives, specific specifically substituted 1,2,4-triazole derivatives, 1,2,4-oxadiazole derivatives and 1,2,4-thiadiazole derivatives and an organic light emitting element comprising the specific 1,2,4-azole derivatives as well as a light emitting layer comprising the specific 1,2,4-azole derivatives; the use of the specifically substituted 1,2,4-triazole derivatives, 1,2,4-oxadiazole derivatives and 1,2,4-thiadiazole derivatives for electrophotographic photoreceptors, photoelectric converters, sensors, dye lasers, solar cell devices and organic light emitting elements, and the use of the specifically substituted 1,2,4-triazole derivatives, 1,2,4-oxadiazole derivatives and 1,2,4-thiadiazole derivatives for generating delayed fluorescence emission.

A process for the preparation of diaminophenothiazinium compounds is described, which allows achieving quickly and effectively a high degree of purity of the same.

A process for the preparation of diaminophenothiazinium compounds is described, which allows achieving quickly and effectively a high degree of purity of the same.

The invention provides compounds having the general formula I: and pharmaceutically acceptable salts thereof, wherein the variables R.sup.1, R.sup.2, R.sup.3, R.sup.4, subscipt m and n, have the meaning as described herein, and compositions containing such compounds and methods for using such compounds and compositions.

The invention provides compounds having the general formula I: and pharmaceutically acceptable salts thereof, wherein the variables R.sup.1, R.sup.2, R.sup.3, R.sup.4, subscipt m and n, have the meaning as described herein, and compositions containing such compounds and methods for using such compounds and compositions.

This invention patent relates, in a first aspect, to cell staining compositions comprising a mixture of dyes or salts and complexes thereof in an aqueous medium and optionally a cell lysis agent. Also disclosed are methods for preparing a staining composition and a lysis agent, besides the uses of the staining composition in methods for preparing cell samples. The compositions of the present invention make simultaneous cell staining and differentiation possible, allowing a direct differential count to be carried out, without requiring the stained sample to be smeared on a slide.

This invention patent relates, in a first aspect, to cell staining compositions comprising a mixture of dyes or salts and complexes thereof in an aqueous medium and optionally a cell lysis agent. Also disclosed are methods for preparing a staining composition and a lysis agent, besides the uses of the staining composition in methods for preparing cell samples. The compositions of the present invention make simultaneous cell staining and differentiation possible, allowing a direct differential count to be carried out, without requiring the stained sample to be smeared on a slide.

Methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as diaminophenothiazinium compounds) including Methythioninium Chloride (MTC) (also known as Methylene Blue) are provided.

##STR00001##

Methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as diaminophenothiazinium compounds) including Methythioninium Chloride (MTC) (also known as Methylene Blue) are provided.

##STR00001##

Disclosed herein are methods for preparing ultrapure diaminophenothiasinium compounds with high solubility in solutions, e.g., water, and the compositions provided therefrom.