Light emitting polymer
AssigneeUniversity of Hull
InventorsMary O'Neill, Stephen Malcolm Kelly, Adam Edward Alexander Contoret, Gary James Richards
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Abstract
There is provided a process for forming a light emitting polymer comprising photopolymerization of a reactive mesogen having an endgroup which is susceptible to photopolymerization e.g. by a radical polymerization process. Also provided are methods for using the light emitter in displays, backlights, electronic apparatus and security viewers.
Claims43
A process for forming a light emitting polymer comprising photopolymerization of a reactive mesogen having the formula:
- B—S-A-S—B (general formula 1)
- wherein
- A is a chromophore;
- S is a spacer;
- and
- B is an endgroup which is susceptible to photopolymerization.
A process according to claim 22, wherein the reactive mesogen is selected from the group consisting of
- 2 n m Compound 8 2 5 Compound 9 3 5 Compound 10 4 5 Compound 11 5 5 Compound 12 6 5 Compound 13 8 5 Compound 14 8 7 Compound 15 8 11
A process for applying a light emitting polymer to a surface comprising
- applying a reactive mesogen to said surface;
- and
- photopolymerizing said reactive mesogen in situ to form the light emitting polymer,
- wherein the reactive mesogen has the formula:
- B—S-A-S—B (general formula 1)
- wherein
- A is a chromophore;
- S is a spacer;
- and
- B is an endgroup which is susceptible to photopolymerization.
An intermediate compound for use in making a light emitting polymer comprising 2,7-bis[5-(4-hydroxyphenyl)thien-2-yl]-9,9-dipropylfluorene (key intermediate 1).
An intermediate compound for use in making a light emitting polymer comprising 9,9-diethyl-2,7-bis(4-hydroxybiphenyl-4′-yl)fluorene (key intermediate 2).
Dependencies are inferred from the claim text.