The present invention relates to compounds of the formula (I) and to the use thereof in organic electronic devices, and to organic electronic devices which comprise compounds of the formula (I), preferably as hole-transport materials and/or as matrix materials, in particular in combination with a further matrix material.

The present invention relates to organic light emitting elements, comprising thermally activated delayed fluorescence (TADF) emitters and/or hosts on basis of benzotriazoles, which have a sufficiently small energy gap between S.sub.1 and T.sub.1 (E.sub.ST) to enable up-conversion of the triplet exciton from T.sub.1 to S.sub.1. The organic light emitting elements show high electroluminescent efficiency.

A compound represented by the following general formula is useful as a light emitting material. X represents an oxygen atom or a sulfur atom. R.sup.1 to R.sup.8 represent a hydrogen atom or a substituent, provided that at least one of R.sup.1 to R.sup.8 is a carbazolyl group, etc. ##STR00001##

A compound represented by the following general formula is useful as a light emitting material. X represents an oxygen atom or a sulfur atom. R.sup.1 to R.sup.8 represent a hydrogen atom or a substituent, provided that at least one of R.sup.1 to R.sup.8 is a carbazolyl group, etc. ##STR00001##

Disclosed are methods of synthesis and/or purification of certain 3,7-diamino-phenothiazin-5-ium compounds (diaminophenothiazinium compounds) including Methylthioninium Chloride (MTC) (Methylene Blue), and the resulting high purity characterized by a purity greater than 98%, and very low levels of heavy metals and organic impurities Azure A, B, C and MVB. Also disclosed are methods of treatment of a tauopathy or methemoglobinemia in a patient in need thereof, comprising administering to the patient a therapeutically effective amount of the high-purity diaminophenothiazinium compound.

The present invention provides a method for measuring a component to be measured in a sample, comprising converting the component to be measured in the sample into hydrogen peroxide and measuring the formed hydrogen peroxide in the presence of an -keto acid using an oxidative-coloring chromogen. The present invention also provides a method for suppressing the influence of a peroxide on a method of converting a component to be measured in a sample into hydrogen peroxide and measuring the formed hydrogen peroxide using an oxidative-coloring chromogen, the suppression method comprising using an -keto acid. The measuring method and the suppression method of the present invention using an -keto acid suppress the influence of a peroxide to give an accurate measurement of the component to be measured in the sample.

The present invention provides a method for measuring a component to be measured in a sample, comprising converting the component to be measured in the sample into hydrogen peroxide and measuring the formed hydrogen peroxide in the presence of an -keto acid using an oxidative-coloring chromogen. The present invention also provides a method for suppressing the influence of a peroxide on a method of converting a component to be measured in a sample into hydrogen peroxide and measuring the formed hydrogen peroxide using an oxidative-coloring chromogen, the suppression method comprising using an -keto acid. The measuring method and the suppression method of the present invention using an -keto acid suppress the influence of a peroxide to give an accurate measurement of the component to be measured in the sample.

A rhodamine-methylene blue derivative fluorescent probe and its preparation method and application are in the technical field of organic synthesis. The rhodamine-methylene blue derivative fluorescent probe has available raw materials and a simple prepared method; the rhodamine-methylene blue derivative fluorescent probe can detect ClO.sup. and ATP in cells by synchronized dual-channel fluorescence, with a detection limit of 0.90 nM for the ClO.sup. and 23.60 nM for the ATP, and thus the rhodamine-methylene blue derivative fluorescent probe can be used for fluorescence quantitative detection of the ClO.sup. and the ATP, and can also be used for simultaneous fluorescence imaging of ClO.sup. and ATP in drug-stimulated cells. Therefore, the rhodamine-methylene blue derivative fluorescent probe has a wide range of potential applications.

A rhodamine-methylene blue derivative fluorescent probe and its preparation method and application are in the technical field of organic synthesis. The rhodamine-methylene blue derivative fluorescent probe has available raw materials and a simple prepared method; the rhodamine-methylene blue derivative fluorescent probe can detect ClO.sup. and ATP in cells by synchronized dual-channel fluorescence, with a detection limit of 0.90 nM for the ClO.sup. and 23.60 nM for the ATP, and thus the rhodamine-methylene blue derivative fluorescent probe can be used for fluorescence quantitative detection of the ClO.sup. and the ATP, and can also be used for simultaneous fluorescence imaging of ClO.sup. and ATP in drug-stimulated cells. Therefore, the rhodamine-methylene blue derivative fluorescent probe has a wide range of potential applications.

Provided is a measuring method of a component to be measured in a specimen while suppressing an influence of bilirubin. A measuring method of a component to be measured, comprising converting the component to be measured in the specimen to hydrogen peroxide through an enzymatic reaction, reacting the formed hydrogen peroxide with an oxidative-coloring chromogen in the presence of a peroxidase, and measuring an absorbance of the colored reaction solution to thereby determine the component to be measured, wherein a fatty acid or a salt thereof coexists. The measuring method of a component to be measured in a specimen according to the present invention is useful in clinical diagnosis.