Oligomer and polymer comprising triphenyl phosphine units
View Patent ↗An oligomer or polymer comprising a first repeat unit and a second repeat unit that may be the same or different, the first repeat unit having formula (I): wherein each E independently represents optionally substituted nitrogen or optionally substituted phosphorus, with the proviso that at least one E is optionally substituted phosphorus; each Ar 1 , Ar 2 and Ar 3 is the same or different and independently represents an optionally substituted aryl or heteroaryl; n is 0-3; and in the case of unsubstituted nitrogen and phosphorus, the second repeat unit is directly conjugated to the first repeat unit.
1. An oligomer or polymer comprising a first repeat unit and a second repeat unit that is different from the first repeat unit, the first repeat unit having formula (I):
wherein
each E independently represents a nitrogen or a phosphorus atom, with the proviso that at least one E is a phosphorus atom;
each Ar 1 , Ar 2 and Ar 3 is the same or different and independently represents an optionally substituted aryl or heteroaryl;
each E is further optionally substituted with at least one additional substituent;
n is an integer from 0 to 3; and
wherein the second repeat unit and optionally further repeat units are selected from optionally substituted phenyl, fluorene, spirobifluorene, indenofluorene, heteroaryl and/or dihydrophenanthrene and
with the further proviso that when E is an unsubstituted atom, then the second repeat unit is directly conjugated to the first repeat unit.
2. An oligomer or polymer according to claim 1 wherein each Ar 1 , Ar 2 and Ar 3 is an optionally substituted phenyl.
3. An oligomer or polymer according to claim 1 , wherein at least one Ar 3 is substituted by a substituent selected from the group consisting of optionally substituted, branched, cyclic or linear C 1-20 alkyl or C 1-20 alkoxy; C 1-20 -fluoroalkyl, fluorine, optionally substituted diarylamine and optionally substituted diarylphosphine.
4. An oligomer or polymer according to claim 1 , wherein E is selected from the group consisting of nitrogen, unsubstituted phosphorus and phosphorus oxide.
5. An optical device comprising an oligomer or polymer according to claim 1 .
6. An optical device according to claim 5 , wherein the oligomer or polymer is located in a layer between a first electrode for injection of holes and a second electrode for injection of electrons.
7. An optical device according to claim 6 , wherein the device is an electroluminescent device.
8. A switching device comprising an oligomer or polymer according to claim 1 .
9. A field effect transistor, comprising:
an insulator having a first side and a second side;
a gate electrode located on the first side of the insulator;
an oligomer or polymer according to claim 1 , located on the second side of the insulator; and
a drain electrode and a source electrode located on the oligomer or polymer.
10. An integrated circuit comprising a field effect transistor according to claim 9 .
11. The oligomer or polymer according to claim 1 , wherein the second repeat unit and optionally further repeat units are selected from optionally substituted phenyl, fluorene, spirobifluorene, indenofluorene, heteroaryl, or dihydrophenanthrene.
12. The oligomer or polymer according to claim 1 , wherein the first repeat unit is present in the polymer in the range from 1 to 50 mol %.
13. A polymer according to claim 1 .