Abstract: A compound may include a partial structures of formula (3-1A), (32h), and (3-11B) in one molecule, R300 to R306 being independently H or a substituent, or adjacent pair(s) form a ring, at least one of R301 to R306 is a single bond to another atom/structure in the molecule, and one of R301 to R306 is a single bond to the partial structure of formula (32h), X30 is N bonded to the partial structure of formula (3-1A), Y41 to Y48 are independently CR32, or C bonded to another atom/structure in the molecule, at least one of Y41 to Y48 is C bonded to the partial structure of formula (3-11B), R32 are independently H or a substituent, or pair(s) of adjacent R32 are bonded to form a ring, and at least one R32 is independently a single bond to another atom/structure in the molecule.

Abstract: A compound may include partial structures of formula (3-11B) and (31a), mutually bonded in one molecule: R314 being a single bond bonded to * in formula (31a), R300 being independently H or a substituent, or at least one of adjacent pairs of R300 are mutually bonded to form a ring, or R300 is a single bond bonded to another atom/structure in the molecule, one or more R300 is H, at least one of H being D, Y12 to Y16 being independently N, CR31, or C bonded to another atom/structure in the molecule, 1 to 3 of Y12 to Y16 being N, and R31 independently being H or a substituent.

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom, and the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C). S1(M2) of the compound M2 and S1(M3) of the compound M3 satisfy a relationship of S1(M3)>S1(M2). In the formulae (1C) and (2C), Y41 to Y48 are each independently a N atom, CR, or a C atom bonded to another atom or the like in the compound M3, where each R is independently a H atom or a substituent, at least one of Y41 to Y48 is a N atom, and at least one of Y41 to Y48 is a C atom bonded to another atom or the like in the compound M3.

Abstract: What is provided is an automobile body in which batteries, tires, and liquids containing water and oil are removed from a public road vehicle with superior collision safety, the public road vehicle comprising at least a steel material containing a steel sheet with a tensile strength of 1180 MPa or higher, a non-ferrous metal material, and a resin material, wherein the ratio of a mass mh (kg) of the steel sheet having a tensile strength of 1180 MPa or higher to a mass m (kg) of the automobile body is 9% or higher, and a mass m (kg) of the automobile body and a projected area s (m2) of the automobile body from an upper side satisfy a formula (1) and a formula (2) 6 < s < 11 ( 1 ) m < ( 2 ? 7 ? 2 . 3 ? 7 × s - 8 ? 3 ? 5 ) × 0 ? .98 .

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer contains a compound, including a structure including a first partial structure of formula (3-100) and a second partial structure of formula (3-1A), mutually bonded in one molecule: In formula (3-100), D1 to D3 are each a deuterium atom, or one of D1 to D8 is a single bond to another atom/structure in the molecule, and remaining D1 to D8 are each a deuterium atom, and R310 is a single bond bonded to the second partial structure. In formula (3-1A), one of R301 to R306 is a single bond bonded to the first partial structure, and remaining R301 to R306 not being bonded to the first partial structure are independently H, a substituent, or a single bond bonded to another atom/structure in the molecule.

Abstract: An organic electroluminescence device may include an emitting layer between an anode and a cathode, in which the emitting layer contains a first compound that fluoresces, a second compound that exhibits delayed fluorescence, and a third compound. The first compound may have formula (1): the second compound may have formula (2): the third compound may have formula (3): , and a singlet energy of the first compound S1(M1), a singlet energy of the second compound S1(M2), and a singlet energy of the third compound S1(M3) satisfy a Inequality S1(M3)>S1(M2)>S1(M1) ??(Eq. 1).

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer contains a compound, including a structure including a first partial structure of formula (3-100) and a second partial structure of formula (3-1A), mutually bonded in one molecule: In formula (3-100), D1 to D3 are each a deuterium atom, or one of D1 to D8 is a single bond to another atom/structure in the molecule, and remaining D1 to D8 are each a deuterium atom, and R310 is a single bond bonded to the second partial structure. In formula (3-1A), one of R301 to R306 is a single bond bonded to the first partial structure, and remaining R301 to R306 not being bonded to the first partial structure are independently H, a substituent, or a single bond bonded to another atom/structure in the molecule.

Abstract: An organic electroluminescence device includes: an anode; a cathode; and an emitting layer provided between the anode and the cathode, in which the emitting layer contains a delayed fluorescent compound M2 and a compound M3 represented by a formula (3) and a singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy a relationship of a numerical formula (Numerical Formula 1) below, S1(M3)>S1(M2) . . . (Numerical Formula 1). In the formula (3), A3 is a group represented by a formula (3a) or the like.

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom, and the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C). S1(M2) of the compound M2 and S1(M3) of the compound M3 satisfy a relationship of S1(M3)>S1(M2). In the formulae (1C) and (2C), Y41 to Y48 are each independently a N atom, CR, or a C atom bonded to another atom or the like in the compound M3, where each R is independently a H atom or a substituent, at least one of Y41 to Y48 is a N atom, and at least one of Y41 to Y48 is a C atom bonded to another atom or the like in the compound M3.

Abstract: An organic EL device includes: an anode, a cathode, and an emitting layer, in which the emitting layer contains a first compound of a formula (1), a second compound of a formula (2), and a third compound that exhibits delayed fluorescence, and singlet energies S1 of the first compound, the second compound, and the third compound satisfy Numerical Formula 1 and Numerical Formula 2. In the formula (1), A represents a group of a formula (a1) or the like, L represents a linking group or the like, and B represents an aryl group or the like. The first compound of the formula (1) has no carbonyl group. In the formula (2), Y21 to Y26 each independently represent an N atom, CRA, or the like. RA represents a substituent, a group of a formula (2A), or the like.

Abstract: A compound is represented by a formula (1). n is 2 to 4, m is 1 to 4, q is 0 to 3, and m+n+q=6; CN is a cyano group; D1 is a group represented by a formula (2), (3) or (3X), the plurality of D1 are the same; and Rx is a hydrogen atom or substituent. R1 to R8 are each independently a hydrogen atom or substituent. R31 to R38 and R41 to R48 are each independently a hydrogen atom or substituent; p, px and py are each independently 1 to 4; A to C are each independently a cyclic structure represented by a formula (131) or (132). R19 and R20 are each independently a hydrogen atom or substituent. X1 is a sulfur atom or the like, and * represents a bonding position with a carbon atom of a benzene ring in the formula (1).

Abstract: A compound of formula (1) wherein X1 is CR1 or a nitrogen atom, X2 is CR2 or a nitrogen atom, X3 is CR3 or a nitrogen atom, X4 is CR4 or a nitrogen atom, X5 is CR5 or a nitrogen atom, X6 is CR6 or a nitrogen atom, X7 is CR7, a nitrogen atom, or a carbon atom single-bonded to X8, X8 is CR8, a nitrogen atom, or a carbon atom single-bonded to X7, X9 is CR9 or a nitrogen atom, X10 is CR10 or a nitrogen atom, X11 is CR11 or a nitrogen atom, X12 is CR12 or a nitrogen atom, and Q is CRQ or a nitrogen atom, and Y is NRY1, an oxygen atom, a sulfur atom, C(RY2)(RY3) or Si(RY4)(RY5), each R being a hydrogen atom or a substituent.

Abstract: A compound of formula (11) to (13) wherein R1 to R4 are each independently D1 of a formula (1-1) etc. or D2 of a formula (2-1) etc. at least one of R1 to R4 being D1, and at least one of R1 to R4 being D2. In (1-1) and (2-1), X1 is O or S, R101 to R110 and R161 to R168 are each independently H, a substituent etc. In at least one D1, at least one of R101 to R110 is a group of a formula (110) or (120): Z1 is a C etc., a ring (B) is an aromatic hydrocarbon ring etc., Y12 to Y14 are each independently CR10A etc., Y21 to Y24 are each independently CR20A etc., Z2 is an aryl group etc., and * is a bonding position.

Abstract: An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy the relationship S1(M3)>S1(M2).

Abstract: An organic-EL device includes an emitting-layer, first-layer adjacent to the emitting-layer near the anode, and second-layer adjacent to the emitting-layer near the cathode. The emitting-layer contains first, second and third compounds. The first-layer contains a compound of formula-(A). The second-layer contains a compound of formula-(B). The first, second and third compounds are a fluorescent compound of formula-(1), delayed-fluorescent compound of formula-(2), and compound of formula-(3), respectively. Singlet energies S1 of the first to third compounds satisfy S1(M3)>S1(M2)>S1(M1). In the formula-(A), Ra1-Ra5 etc. each represent a substituent etc. In the formula-(B), X1-X3 each represent N atom etc, Ar1 and Ar2 each represent a group of formula-(1B) etc. A represents the group of the formula-(1B). In the formula-(1B), HAr is of formula-(2B), a is 1 to 5, and L1 is a linking group etc. In the formula-(2B), X11-X18 each represent N atom etc, and Y1 represent O, S, or N atom etc.

Abstract: An organic electroluminescence device includes: an anode; a cathode; an emitting layer provided between the anode and the cathode, in which the emitting layer contains a delayed fluorescent compound M2 and a compound M3 represented by a formula (3), and a singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy the relationship S1(M3)>S1(M2). In the formula (3), A30 is a group represented by a formula (3a) or the like.

Abstract: An organic EL device includes an emitting layer, a first layer adjacent to an anode-side of the emitting layer, and a second layer adjacent to a cathode-side thereof. The emitting layer contains first to third compounds. The first and second layers contain compounds of Formulae (1) and (2), respectively. The first and second compounds exhibits fluorescence and delayed fluorescence, respectively. Singlet energies S1 of the first to third compounds satisfy S1(M3)>S1(M2)>S1(M1). In Formula (1), Ra1-Ra5, Rb1-Rb5 and Rc1-Rc5 are each a substituent, etc. In Formula (2), X1-X3 are each nitrogen atom, etc, Ar1-Ar2 are each a group of Formula (2A) or aryl group, etc, A is a group of Formula (2A) in which HAr is of Formula (2B), a is 1 to 5, L1 is a linking group, etc.

Abstract: An organic EL device includes an anode, a cathode, and an emitting layer interposed between the anode and the cathode, in which the emitting layer includes a delayed fluorescent compound M2 and a compound M3 represented by a formula (100), and a singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy a numerical formula (Numerical Formula 1). In the formula (100), X1 is an oxygen atom or a sulfur atom, C1 is a carbon atom, R11 to R18, R2, R31, R32, R34, R35, R4 and R45 to R48 are each independently a hydrogen atom, substituent or the like, n is 1, 2, or 3. When L1 is a single bond, n is 1, k is 1, 2, or 3, m is 2, 3, or 4, k+m=5, and L1 is a single bond or linking group.

Abstract: An organic EL device includes an anode, a cathode, and an emitting layer. The emitting layer contains a first compound represented by a formula (1X) or a formula (1Y), a second compound, and a third compound that exhibits delayed fluorescence. The second compound is different in structure from the first compound. The second compound is different in structure from the third compound. Singlet energies S1 of the first, second, third compounds satisfy Numerical Formula 1 and Numerical Formula 2 below, A is, for example, a group represented by a formula (a1); Y11˜Y13 are, for example, each independently a nitrogen atom or CRy; Ry is, for example, a substituent or a group represented by a formula (1Z); R1X to R3X are, for example, each independently a substituent or a group represented by a formula (1Z).

Abstract: A compound is represented by a formula (1).