A compound represented by the general formula (1) is useful as a light emitting material. In the general formula (1), Ar.sup.1 to Ar.sup.3 represent an aryl group, provided that Ar.sup.2 and Ar.sup.3 are the same as each other, and at least one of Ar.sup.1 to Ar.sup.3 represents an aryl group substituted with a group represented by the general formula (2). In the general formula (2), R.sup.1 to R.sup.8 represent a hydrogen atom or a substituent; Z represents O, S, R.sup.9N, (R.sup.10) (R.sup.11)C, or (R.sup.12) (R.sup.13)Si; and R.sup.9 to R.sup.13 each independently represent a hydrogen atom or a substituent. ##STR00001##

A compound represented by the general formula (1) is useful as a light emitting material. In the general formula (1), Ar.sup.1 to Ar.sup.3 represent an aryl group, provided that Ar.sup.2 and Ar.sup.3 are the same as each other, and at least one of Ar.sup.1 to Ar.sup.3 represents an aryl group substituted with a group represented by the general formula (2). In the general formula (2), R.sup.1 to R.sup.8 represent a hydrogen atom or a substituent; Z represents O, S, R.sup.9N, (R.sup.10) (R.sup.11)C, or (R.sup.12) (R.sup.13)Si; and R.sup.9 to R.sup.13 each independently represent a hydrogen atom or a substituent. ##STR00001##

A leuco polymer comprising a polyethylenimine and at least one leuco moiety covalently bound to the polyethylenimine, wherein the polyethylenimine comprises three or more amine nitrogen atoms and 1 mol. % or more of amine hydrogen atoms in the polyethylenimine are replaced with a moiety selected from the group consisting of 2-hydroxypropyl, 1-hydroxypropane-2-yl, and polyalkoxy groups. Methods of making the leuco polymer, laundry care compositions comprising the leuco polymer and methods of treating textiles with such laundry care compositions.

A leuco polymer comprising a polyethylenimine and at least one leuco moiety covalently bound to the polyethylenimine, wherein the polyethylenimine comprises three or more amine nitrogen atoms and 1 mol. % or more of amine hydrogen atoms in the polyethylenimine are replaced with a moiety selected from the group consisting of 2-hydroxypropyl, 1-hydroxypropane-2-yl, and polyalkoxy groups. Methods of making the leuco polymer, laundry care compositions comprising the leuco polymer and methods of treating textiles with such laundry care compositions.

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.

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.

The present application relates to an electronic device comprising a heteroaromatic compound of a formula (I) as functional material, in particular as electron-transport material and as matrix material for emitter compounds. ##STR00001##

The present application relates to an electronic device comprising a heteroaromatic compound of a formula (I) as functional material, in particular as electron-transport material and as matrix material for emitter compounds. ##STR00001##

An object of the invention is to provide: a photoelectric conversion material which has excellent deposition stability such that when the photoelectric conversion material is used in a photoelectric conversion element, the change in the performance of the element due to variations in the concentration of the photoelectric conversion material is small; a photoelectric conversion element using the photoelectric conversion material; and an optical sensor and an imaging element including the photoelectric conversion element. The photoelectric conversion material of the invention is a compound (A) expressed by the following Formula (1). ##STR00001##

An object of the invention is to provide: a photoelectric conversion material which has excellent deposition stability such that when the photoelectric conversion material is used in a photoelectric conversion element, the change in the performance of the element due to variations in the concentration of the photoelectric conversion material is small; a photoelectric conversion element using the photoelectric conversion material; and an optical sensor and an imaging element including the photoelectric conversion element. The photoelectric conversion material of the invention is a compound (A) expressed by the following Formula (1). ##STR00001##