Compound, organic electroluminescent element and electronic device
A compound represented by a formula (1) and having at least one deuterium atom is provided. In the formula (1), n is 1 to 4, L 1 is a divalent group or a group represented by a formula (11) and R 111 to R 119 and R 211 to R 219 are each independently a hydrogen atom or a substituent, where the compound represented by the formula (1) does not include a group represented by —N(R 906 ) (R 907 ) and R 906 and R 907 are each independently a hydrogen atom, an alkyl group having 1 to 50 carbon atoms, or the like. In the formula (11), X 13 is an oxygen atom or a sulfur atom, Y 1 to Y 8 are each independently CR 300 or a nitrogen atom, and two of R 300 are a single bond bonded with *a or other L 1 and a single bond bonded with *b or other L 1 .
1 . A compound represented by a formula (1) below and comprising at least one deuterium atom, and having a ratio of the number of deuterium atoms to a total number of hydrogen atoms being 30% or more,
where, in the formula (1): n is 1;
L 1 is a group represented by any one of formulae (L-1) to (L-3) below; and
R 111 to R 119 and R 211 to R 219 are each a hydrogen atom,
where, in the formulae (L-1) to (L-3):
one of two * represents a bonding position with *a in the formula (1) and the other * represents a bonding position with *b in the formula (1); and
R 11 to R 15 are each independently a hydrogen atom, an unsubstituted phenyl group, or an unsubstituted naphthyl group.
2 . The compound according to claim 1 , wherein
L 1 comprises at least one deuterium atom.
3 . The compound according to claim 1 , wherein
at least one of R 11 to R 15 is a deuterium atom.
4 . The compound according to claim 1 , wherein
at least one of R 11 to R 15 is a substituent, and at least one of R 11 to R 15 as the substituent each independently comprises one or more deuterium atom(s).
5 . The compound according to claim 1 , wherein
-(L 1 )n- is a group represented by a formula (L n -18) below,
where, in the formula (L n -18):
Ra is a hydrogen atom; and
one of two * represents a bonding position with *a in the formula (1) and the other * represents a bonding position with *b in the formula (1).
6 . The compound according to claim 5 , wherein
at least one of the plurality of Ra is a deuterium atom.
7 . The compound according to claim 1 , wherein
a total number of carbon atoms comprised in -(L 1 ) n- is 21 or less.
8 . The compound according to claim 1 , wherein
at least one of R 111 to R 119 or R 211 to R 219 is a deuterium atom.
9 . The compound according to claim 1 , wherein
R 111 to R 119 are each a deuterium atom, or
R 211 to R 219 are each a deuterium atom.
10 . The compound according to claim 1 , wherein
R 111 to R 119 and R 211 to R 219 are each a deuterium atom.
11 . An organic electroluminescence device comprising:
an anode;
a cathode; and
an emitting layer interposed between the anode and the cathode, wherein
the emitting layer comprises a compound M2 in a form of the compound according to claim 1 .
12 . The organic electroluminescence device according to claim 11 , wherein
the emitting layer further comprises a fluorescent compound M1.
13 . The organic electroluminescence device according to claim 11 , wherein
a singlet energy S 1 (M2) of the compound M2 and a singlet energy S 1 (M1) of the compound M1 satisfy a relationship of a numerical formula (Numerical Formula 1) below,
S 1 ( M 2)> S 1 ( M 1) (Numerical Formula 1).
14 . The organic electroluminescence device according to claim 11 , wherein
the emitting layer comprises no metal complex.
15 . The organic electroluminescence device according to claim 11 , further comprising
a hole transporting layer between the anode and the emitting layer.
16 . The organic electroluminescence device according to claim 11 , further comprising
an electron transporting layer between the cathode and the emitting layer.
17 . An electronic device comprising the organic electroluminescence device according to claim 11 .
18 . The compound according to claim 1 , wherein
L 1 is a group represented by the formula (L-1).
19 . The compound according to claim 1 , wherein
the ratio of the number of deuterium atoms to the total number of hydrogen atoms of the compound represented by the formula (1) is 40% or more.
20 . The compound according to claim 1 , wherein
the ratio of the number of deuterium atoms to the total number of hydrogen atoms of the compound represented by the formula (1) is 50% or more.
21 . The compound according to claim 1 , wherein
the ratio of the number of deuterium atoms to the total number of hydrogen atoms of the compound represented by the formula (1) is 60% or more.
22 . The compound according to claim 1 , wherein
the ratio of the number of deuterium atoms to the total number of hydrogen atoms of the compound represented by the formula (1) is 70% or more.
23 . The compound according to claim 1 , wherein
the ratio of the number of deuterium atoms to the total number of hydrogen atoms of the compound represented by the formula (1) is 80% or more.