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Product Code B1981-LT-50g
Price $125 ex. VAT

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A diamino fluorene derived building block

As an intermediate for the synthesis of polyimides and semiconductors in application of high-performance polymers, solar cells, and fuel cell membranes


9,9-Bis(4-aminophenyl)fluorene (FDA)  is a fluorene derivative with two aminophenyl substituents on the 9-position. 9,9-Bis(4-aminophenyl)fluorene is partially conjugated and can be developed as a dopant-free organic hole transporting materials in inverted perovskite solar cells (overall efficiency of 15.9%).

By having the diaminophenyl groups, FDA is commonly used to synthesize polyimides that exhibit high thermal stability (Td5% = 530 °C) and hydrolytic stability for optical fibre light guide coatings. Due to the fact that FDA is not fully aromatized, it is selected for synthesizing thermally stable transparent polyimides. A further modification of the polyimide synthesized from 9,9-bis(4-aminophenyl)fluorene is feasible via Friedel-Crafts alkylation on the fluorene moiety, as the polyimide backbone is chemically stable.

General Information

CAS Number 15499-84-0
Chemical Formula C25H20N2
Full Name 9,9-Bis(4-aminophenyl)fluorene
Molecular Weight 348.44 g/mol
Synonyms 4,4'-(9-Fluorenylidene)dianiline, 4-[9-(4-Aminophenyl)-9H-fluoren-9-yl]phenylamine
Classification / Family Fluorene derivatives, Diamine building blocks, Polyimides, solar cells, Fuel cell membranes

Chemical Structure

9,9-Bis(4-aminophenyl)fluorene(FDA) chemical structure, CAS 15499-84-0
9,9-Bis(4-aminophenyl)fluorene(FDA) chemical structure, CAS 15499-84-0

Product Details

Purity >99%
Melting Point Tm = 237 °C – 239 °C
Appearance White to pale yellow powder/crystal

MSDS Documentation

9,9-Bis(4-aminophenyl)fluorene(FDA)9,9-Bis(4-aminophenyl)fluorene(FDA) MSDS Sheet

Literature and Reviews

  1. Boosting inverted perovskite solar cell performance by using 9,9-bis(4-diphenylaminophenyl)fluorene functionalized with triphenylamine as a dopant-free hole transporting material, H. Pham et al., J. Mater. Chem. A, 7, 12507-12517(2019); DOI: 10.1039/C9TA01681C.
  2. Colorless, heat resistant polyimide films derived from 2,3,3',4'-biphenyltetracarboxylic dianhydride, G. Song et al., IOP Conf. Ser.: Mater. Sci. Eng., 733, 012035(2020); DOI: 10.1088/1757-899X/733/1/012035.
  3. Interfacial polymerization at the alkane/ionic liquid interface, C. Liu et al., Angew. Chem. Int. Ed., 60, 14636– 14643(2021); DOI: 10.1002/anie.202103555.
  4. Low-permittivity copolymerized polyimides with fluorene rigid conjugated structure, X. Dong et al., Materials, 14, 6266(2021); DOI: 10.3390/ma14216266.
  5. Modified CARDO-based copolyimides with improved sour mixed-gas permeation properties, A. Hayek et al., ACS Appl. Polym. Mater., 4(12), 9257–9271(2022); DOI: 10.1021/acsapm.2c01527.
  6. Silicon-containing polyimides: synthesis, properties, and application as optical fiber light guide coatings, D. Sapozhnikov et al., Russ. Chem. Bull., 69(8), 1486-1491(2020); DOI: 10.1007/s11172-020-2927-z.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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