A method to generate cyclic hydrocarbons from farnesene to increase both the density and net heat of combustion of the product fuels.

A compound represented by a formula (1C-A) below.

##STR00001##

One of R.sub.4 to R.sub.8 and R.sub.10 to R.sub.12 is a group represented by a formula (1D-A) above; R.sub.1 to R.sub.3, R.sub.9, and R.sub.4 to R.sub.8 and R.sub.10 to R.sub.12 not being the group represented by the formula (1D-A) are each a hydrogen atom, a substituent, or the like; at least one of R.sub.21 to R.sub.30 is other than a hydrogen atom; when R.sub.11 is a group represented by a formula (1D), R.sub.12 is a hydrogen atom or a phenyl group; when R.sub.12 is a group represented by the formula (1D), R.sub.11 is a hydrogen atom or a phenyl group; in the formula (1D), one of R.sub.21 to R.sub.30 represents a bonding position to a benz[a]anthracene ring in the formula (1C), and R.sub.21 to R.sub.30 not being the bonding position are each a hydrogen atom, a substituent, or the like.

An organic electroluminescence device includes an anode, a cathode, and an emitting region disposed between the anode and the cathode, in which the emitting region includes a first emitting layer and a second emitting layer, the first emitting layer contains a first compound represented by a formula below, and the second emitting layer contains a second compound.

##STR00001##

At least one of R.sub.101 to R.sub.112 in the formula (100A), L.sub.101 or Ar.sub.101 in the formula (100B) has at least one deuterium atom. When only L.sub.101 has at least one deuterium atom, the at least one deuterium atom is bonded to a ring that is of rings forming L.sub.1 and directly bonded to a benz[a]anthracene ring in the formula (100A).

An organic electroluminescence device includes an anode, a cathode, and an emitting region disposed between the anode and the cathode, in which the emitting region includes a first emitting layer and a second emitting layer, the first emitting layer contains a first compound represented by a formula below, and the second emitting layer contains a second compound.

##STR00001##

At least one of R.sub.101 to R.sub.112 in the formula (100A), L.sub.101 or Ar.sub.101 in the formula (100B) has at least one deuterium atom. When only L.sub.101 has at least one deuterium atom, the at least one deuterium atom is bonded to a ring that is of rings forming L.sub.1 and directly bonded to a benz[a]anthracene ring in the formula (100A).

A compound is represented by a formula (1A-A). One of R.sub.4 to R.sub.8 and R.sub.10 to R.sub.12 is a group represented by a formula (1B-A1), (1B-A2), or (1B-A3) above; R.sub.1 to R.sub.3, R.sub.9, and R.sub.4 to R.sub.8 and R.sub.10 to R.sub.12 other than the above are each a hydrogen atom, a substituent, or the like; when R.sub.11 or R.sub.12 is a group represented by the formula (1B-A1), (1B-A2), or (1B-A3), R.sub.12 or R.sub.11 is a hydrogen atom or a phenyl group; and in the formulae (1B-A1) to (1B-A3), R.sub.51 to R.sub.57, R.sub.61 to R.sub.64, R.sub.71 to R.sub.74, and R.sub.81 to R.sub.84 forming no ring in the formulae (1B-A1) to (1B-A3) are each a hydrogen atom, a substituent, or the like; and * represents a bonding position to a benz[a]anthracene ring in the formula (1A-A).

##STR00001##

Disclosed are a bis(vinylbenzyl) fluorene and a preparation method and use thereof, and a bis(vinylbenzyl) fluorene hydrocarbon resin and a preparation method and use thereof, belonging to the technical field of high-frequency substrate materials. The bis(vinylbenzyl) fluorene is selected from 9,9-bis(2-vinylbenzyl)-9H-fluorene having a structure shown in formula I and 9,9-bis(4-vinylbenzyl)-9H-fluorene having a structure shown in formula II:

##STR00001## the 9,9-bis(2-vinylbenzyl)-9H-fluorene has a monoclinic crystal system; and the 9,9-bis(4-vinylbenzyl)-9H-fluorene has a triclinic crystal system.

Disclosed are a bis(vinylbenzyl) fluorene and a preparation method and use thereof, and a bis(vinylbenzyl) fluorene hydrocarbon resin and a preparation method and use thereof, belonging to the technical field of high-frequency substrate materials. The bis(vinylbenzyl) fluorene is selected from 9,9-bis(2-vinylbenzyl)-9H-fluorene having a structure shown in formula I and 9,9-bis(4-vinylbenzyl)-9H-fluorene having a structure shown in formula II:

##STR00001## the 9,9-bis(2-vinylbenzyl)-9H-fluorene has a monoclinic crystal system; and the 9,9-bis(4-vinylbenzyl)-9H-fluorene has a triclinic crystal system.