23000-28-4

Basic information

• Product Name: 9H-Fluorene, 2,7-dibromo-9-(phenylmethylene)-
• CAS NO: 23000-28-4
• Molecular Formula: C20H12Br2
• Molecular Weight: 412.123
• Mol File: 23000-28-4.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: 9H-Fluorene, 2,7-dibromo-9-(phenylmethylene)-(CAS DataBase Reference)
• NIST Chemistry Reference: 9H-Fluorene, 2,7-dibromo-9-(phenylmethylene)-(23000-28-4)
• EPA Substance Registry System: 9H-Fluorene, 2,7-dibromo-9-(phenylmethylene)-(23000-28-4)

Safety Data

• Hazardous Substances Data: 23000-28-4(Hazardous Substances Data)

Upstream product

• 100-52-7 benzaldehyde 
• 24764-32-7 2,7-dibromofluorenylidenetriphenyl-phosphorane 
• 68570-29-6 2,7-Dibromfluorenyliden-triphenylarsenan 
• 26279-24-3 2,7,9-tribromofluorene 
• 7516-59-8 As-(benzyl)triphenylarsonium bromide 
• 16548-51-9 benzylidenetriphenylarsenane 
• 16433-88-8 2,7-dibromo-9H-fluorene 

Downstream Products

• 272458-04-5 2,7,9-Tribromo-9-[bromo(phenyl)methyl]-9H-fluorene 
• 272458-06-7 2,7-Dibromo-9-[bromo(phenyl)methylene]-9H-fluorene 
• 272458-15-8 2,7-Dibromo-9-[(9H-4,5-diazafluoren-9-ylidene)phenylmethyl]-9H-fluorene 

Relevant articles and documents

Brightness enhanced blue to green light color conversion copolymer, alkylfluorene-benzothiadiazole-benzylidenylfluorene

A new photoluminescent (PL) polymer, alkylfluorene-benzothiadiazole-benzylidenylfluorene copolymer, was synthesized by a Suzuki coupling reaction, and its optical properties and applicability as a color conversion material were studied. The synthesized PL polymer showed good thermal stability and superior color conversion ability which converts blue light into green. A color conversion film was fabricated using a screen printing method and its optical properties were analyzed after placing the fabricated color-conversion film on a blue light emission device. The measured brightness was 1120 cd/m2, which was approximately 346% higher than that measured for the device without a color-conversion film (251 cd/m2).

Intermolecular oxidative Friedel-Crafts reaction triggered ring expansion affording 9,10-diarylphenanthrenes

A novel intermolecular tandem oxidative aromatic coupling between arylidene fluorenes and unfunctionalized aromatics mediated by a DDQ/TFA oxidation system has been developed for the construction of 9,10-diary-lphenanthrenes (DAPs). The formation of a benzylic carbocation species possessing a quaternary sp3-carbon center on the fluorene moiety by an intermolecular oxidative Friedel-Crafts reaction of two different arenes successfully triggered the subsequent ring expansion to afford DAPs.

Facile synthesis of 1,2-diaryl- and triarylethenes with supported fluoride bases

Differently substituted arenecarbaldehydes, mainly benzaldehydes, can be very efficiently condensed with a wide variety of methylbenzenes having an electron-withdrawing group in the para-position, as well as with fluorenes, xanthene, cyclopentadienes and indenes by using a standardized KF- or CsF-Al2O3 base system in dimethylformamide.