9,9-Bis(4-aminophenyl)fluorene (FDA), CAS 15499-84-0, is a fluorene-based diamine monomer in which two aminophenyl groups sit on the 9-position of the fluorene core. Supplied by Ossila at >99% purity as a white to pale yellow powder or crystal, it serves as an intermediate for polyimides and organic semiconductors used in high-performance polymers, solar cells and fuel cell membranes.
Its two amine groups make FDA a common monomer for polyimides with high thermal stability (T d5% = 530 °C) and good hydrolytic stability, properties exploited in coatings for optical fiber light guides. Because the molecule is not fully aromatized, it is a preferred choice for thermally stable, transparent polyimides. The resulting polyimide backbone is chemically robust, so the fluorene unit can be further modified through Friedel-Crafts alkylation.
FDA is also partially conjugated, and it has been developed into dopant-free organic hole transporting materials for inverted perovskite solar cells, reaching an overall efficiency of 15.9%.
- Monomer for synthesizing polyimides with high thermal and hydrolytic stability.
- Building block for colourless, thermally stable transparent polyimide films.
- Precursor for polyimide coatings on optical fiber light guides.
- Starting material for dopant-free hole transporting materials in inverted perovskite solar cells.
- Intermediate for polymers used in fuel cell membranes and high-performance polymer research.
| Brand | Ossila |
|---|---|
| CAS number | 15499-84-0 |
| Molecular formula | C25H20N2 |
| Purity | >99% |
| Category | — |
| Pack sizes | 50 g, 100 g, 200 g |
| Physical form | White to pale yellow powder/crystal |
| Storage | — |
- Product code: B1981
- Molecular Weight: 348.44 g/mol
- Synonyms: 4,4'-(9-Fluorenylidene)dianiline, 4-[9-(4-Aminophenyl)-9H-fluoren-9-yl]phenylamine
- Melting Point: 237 °C – 239 °C
- Classification / Family: Fluorene derivatives, Diamine building blocks, Polyimides, solar cells, Fuel cell membranes
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