Polymers containing thermally dissociable and soluble groups and the use of such polymers as organic electroluminescent materials
View Patent ↗A polymer, a luminescent material, and the likes are provided, wherein a film can be formed by a wet film-forming method, the film formed has a high stability, and is capable of being laminated with other layers by a wet film-forming method or another method, which are less decrease in charge transportation efficiency or luminescent efficiency, and attain an excellent driving stability. The polymer has a thermally dissociable and soluble group.
1. A polymer, comprising:
a repeating unit comprising an aromatic ring and a hydrocarbon ring fused to the aromatic ring; and
a thermally dissociable and soluble group which is bonded to the hydrocarbon ring,
wherein:
the thermally dissociable and soluble group is a group which is thermally dissociated through a reverse Diels-Alder reaction at 100° C. or more and 300° C. or less, such that the thermally dissociable and soluble group is cleaved from the hydrocarbon ring and the aromatic ring remains in the repeating unit after the thermal dissociation; and
the hydrocarbon ring is a ring comprising a double bond which is not contained in the aromatic ring.
2. The polymer according to claim 1 , wherein the aromatic ring is an aromatic hydrocarbon ring.
3. The polymer according to claim 1 , wherein the thermally dissociable and soluble group is a group which is thermally dissociated at 120° C. or more and 240° C. or less.
4. The polymer according to claim 1 , wherein the hydrocarbon ring is a ring comprising an etheno group or an ethano group.
5. The polymer according to claim 1 , wherein said polymer comprises a repeating unit comprising a structure represented by the following chemical formula (U3):
wherein
ring A 1 represents an aromatic ring, the aromatic ring may have one or more substituents, and the substituents may be bonded to each other directly or through a divalent linking group to form a ring,
S 21 , S 22 , and R 21 to R 26 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group which may have a substituent, an aromatic hydrocarbon ring group which may have a substituent, an aromatic heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent, an acyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, an acyloxy group which may have a substituent, an arylamino group which may have a substituent, a heteroarylamino group which may have a substituent, or an acylamino group which may have a substituent, and
X 1 and X 2 each independently represent a divalent aromatic hydrocarbon ring group which has 6-50 carbon atoms and may have a substituent, or a divalent aromatic heterocyclic group which has 3-50 carbon atoms and may have a substituent; and
n 1 to n 2 each independently represent an integer of 0-5.
6. The polymer according to claim 5 wherein, the ring A 1 is selected from the group consisting of a benzene ring, a naphthalene ring, an anthracene ring, and a tetracene ring.
7. The polymer according to claim 1 , wherein said polymer comprises a repeating unit represented by the following formula (X):
wherein
m represents an integer of 0-3,
Ar 11 and Ar 12 each independently represent a direct bond, an aromatic hydrocarbon ring group which may have a substituent, or an aromatic heterocyclic group which may have a substituent, and
Ar 13 to Ar 15 each independently represent an aromatic hydrocarbon ring group which may have a substituent or an aromatic heterocyclic group which may have a substituent,
Ar 11 and Ar 12 being not direct bonds simultaneously.
8. The polymer of claim 1 , wherein the aromatic ring is an aromatic heterocycle.
9. A composition comprising the polymer according to any one of claims 1 , 2 and 3 - 7 and a solvent.
10. An organic electroluminescence element comprising
an anode,
a cathode, and
an organic layer disposed between the anode and the cathode,
wherein, the organic electroluminescence element comprises a layer formed from the composition according to claim 9 by a wet film-forming method.
11. A solar cell element comprising an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein, the organic layer, the solar cell element comprises a layer formed from the composition according to claim 9 by a wet film-forming method.
12. An organic EL display device, comprising the organic electroluminescence element according to claim 10 .
13. An organic EL lighting, comprising the organic electroluminescence element according to claim 10 .
14. A polymer, comprising at least one repeating unit selected from the repeating-unit group of