9,9-Bis(4-aminophenyl)fluorene (BAFL) CAS 15499-84-0

Synonyms: 4,4'-(9-Fluorenylidene)dianiline; 4,4'-(9H-fluorene-9,9-diyl)dianilinel; FDA; 9,9'-Bis(4-aminophenyl)fluorene

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Product Details

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9,9-Bis(4-aminophenyl)fluorene, CAS 15499-84-0, also known as 4,4'-(9-Fluorenylidene)dianiline or BAFL, is a rigid, fluorene-derived diamine monomer with partial conjugation and high thermal stability (melting point 237–239°C, Td5% up to 530°C). Its structure enables the synthesis of advanced polymers with enhanced mechanical strength, transparency, and resistance to heat and hydrolysis.

Basic Information of BAFL

Product Name	9,9-Bis(4-aminophenyl)fluorene
Abbreviation	BAFL/FDA
CAS Number	15499-84-0
Molecular Formula	C25H20N2
Molecular Weight	348.44 g/mol
Appearance	White to almost white powder to crystaline
Purity	≥99%
Metal Ion
Package	1kg/bottle, 20kg/drum, or customized
Molecular formula

Key Properties

Excellent thermal and oxidative stability
Rigid molecular structure enhances mechanical strength
Good optical transparency
Low dielectric constant for electronic applications
Strong compatibility with various dianhydrides for polyimide synthesis

Key Applications of BAFL

High-Performance Polymers: Serves as a key monomer for synthesizing polyimides, polyamides, and polyamines with superior thermal, mechanical, and hydrolytic stability, used in aerospace composites, electronics, and industrial materials requiring high strength and temperature resistance.

Optoelectronics and Solar Cells: Acts as a dopant-free hole-transporting material in inverted perovskite solar cells, achieving efficiencies up to 15.9%; also used in semiconductor synthesis.

Optical Coatings: Incorporated into transparent polyimide films for optical fiber light guides, leveraging its clarity and stability; the fluorene moiety allows modifications like Friedel-Crafts alkylation for tailored properties.