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##

The present invention relates to a method for prevention of premature polymerization during the preparation, purification, transportation and storage of a polymerizable compound with at least one conjugated unsaturated group in the presence of an azine dye-based compound as inhibitor. Further the present invention relates to methods of preparing such inhibitors as well as to the inhibitors itself, as well as to methods of improving solubility and stability of dissolved inhibitors.

The present invention relates to a method for prevention of premature polymerization during the preparation, purification, transportation and storage of a polymerizable compound with at least one conjugated unsaturated group in the presence of an azine dye-based compound as inhibitor. Further the present invention relates to methods of preparing such inhibitors as well as to the inhibitors itself, as well as to methods of improving solubility and stability of dissolved inhibitors.

A compound having a tricyclic nucleus and having formula (I)

##STR00001##

wherein Ar is C.sub.3-C.sub.25 aryl in which at least one aromatic ring atom is nitrogen; X is O, S or CR.sup.9R.sup.10; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently are hydrogen, deuterium, C.sub.1-C.sub.12 alkyl, C.sub.4-C.sub.12 aryl or C.sub.2-C.sub.12 alkenyl; R.sup.7 and R.sup.8 independently are hydrogen, deuterium, C.sub.1-C.sub.12 alkyl, C.sub.4-C.sub.12 aryl or C.sub.2-C.sub.12 alkenyl or R.sup.7 and R.sup.8 groups attached to a nitrogen atom are joined by a single bond, O, S or CR.sup.11R.sup.12 to form a single nitrogen-containing substituent; R.sup.9 and R.sup.10 independently are hydrogen, deuterium, C.sub.1-C.sub.12 alkyl, C.sub.4-C.sub.12 aryl or C.sub.2-C.sub.12 alkenyl; and R.sup.11 and R.sup.12 independently are hydrogen, deuterium, C.sub.1-C.sub.12 alkyl, C.sub.4-C.sub.12 aryl or C.sub.2-C.sub.12 alkenyl; provided that Ar does not contain an aromatic ring attached to the tricyclic nucleus which contains more than two aromatic ring nitrogen atoms.

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.

An organic metal complex represented by the following general formula is useful as a light emitting material for an organic electroluminescent device and others. X represents O, S or N(R.sup.7); Y represents O, S or N(SO.sub.2R.sup.8); R.sup.1 to R.sup.8 represent H, an alkyl group or an aryl group; at least one of Z.sup.1 and Z.sup.2 represents a phenoxazin-10-yl group, a phenothiazin-10-yl group, a phenazin-10-yl group, etc.; M represents an element of the group 1 except for hydrogen, the group 2, the group 11, the group 12, or the group 13 of the periodic table; L represents a ligand; n is 1 to 3; and m is 0 to 2: ##STR00001##

An organic metal complex represented by the following general formula is useful as a light emitting material for an organic electroluminescent device and others. X represents O, S or N(R.sup.7); Y represents O, S or N(SO.sub.2R.sup.8); R.sup.1 to R.sup.8 represent H, an alkyl group or an aryl group; at least one of Z.sup.1 and Z.sup.2 represents a phenoxazin-10-yl group, a phenothiazin-10-yl group, a phenazin-10-yl group, etc.; M represents an element of the group 1 except for hydrogen, the group 2, the group 11, the group 12, or the group 13 of the periodic table; L represents a ligand; n is 1 to 3; and m is 0 to 2: ##STR00001##

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.

Methods, systems, and apparatus for monitoring and controlling electronic devices using wired and wireless protocols are disclosed. The systems and apparatus may monitor their environment for signals from electronic devices. The systems and apparatus may take and disambiguate the signals that are received from the devices in their environment to identify the devices and associate control signals with the devices. The systems and apparatus may use communication means to send control signals to the identified electronic devices. Multiple apparatuses or systems may be connected together into networks, including mesh networks, to make for a more robust architecture.