187148-75-0

Usage

Uses

A monomer for blue-green light emitting polymers

Upstream product

• 50-00-0 formaldehyd 
• 123863-97-8 9,9-dihexyl-9H-fluorene 
• 86-73-7 9H-fluorene 
• 295796-57-5 9,9’-dihexylfluorene-2,7-dicarbaldehyde 
• 608512-91-0 diethyl 9,9'-dihexyl-9H-fluorene-2,7-dicarboxylate 
• 16433-88-8 2,7-dibromo-9H-fluorene 
• 111-25-1 1-bromo-hexane 
• 295796-56-4 (9,9'-dihexyl-7-hydroxymethyl-9H-fluorene-2-yl)methanol 
• 189367-54-2 2,7-dibromo-9,9-di-n-hexylfluorene 

Relevant academic research and scientific papers

Design, synthesis, and electroluminescent property of CN-poly(dihexylfluorenevinylene) for LEDs

A new green electroluminescence polymer, CN-poly(dihexylfluorenevinylene) (CN-PDHFV), which denotes poly[(9,9-dihexyl-9H-fluorene-2,7-diyl)(1-cyanoethene-1,2-diyl)(9,9-dihexyl-9H-f luorene-2,7-diyl)(2-cyaoethene-1,2-diyl)], was synthesized by condensation polymerization utilizing the Knoevenagel reaction. The resulting polymer exhibits good solubility in common organic solvents such as chloroform, THF, and ODCB. The polymer is also easily cast on a glass plate to green film. The UV-vis spectrum of the polymer exhibits characteristically a broad absorption band at 440 nm. This polymer shows photoluminescence around λmax = 535 nm (exciting wavelength 410 nm) and green electroluminescence around λmax = 530 nm. The current-voltage-luminance (I-V-L) characteristics of the polymer show a turn-on voltage of 4.8 V and a brightness of 600 cd/m2 at 5.8 V in the Al/polymer/PEDOT/ITO device. The highest efficiency was observed to be 0.85 lm/W at 5.6 V.

Poly(arylene vinylene) Synthesis via a Precursor Step-Growth Polymerization Route Involving the Ramberg-B?cklund Reaction as a Key Post-Chemical Modification Step

The synthesis of conjugated copolymers based on poly(fluorene vinylene) [PFV] and poly(fluorene vinylene-co-carbazole vinylene) [PFVCV] was achieved via a previously unexplored precursor three-step synthetic route involving the Ramberg-B?cklund reaction. The resulting π-conjugated (co)polymers proved highly soluble in common organic solvents, such as DCM, THF, or CHCl3. The solution step-growth polymerization between 2,7-bis(bromomethyl)-9,9′-dihexyl-9H-fluorene [F-Br] and 2,7-bis(mercaptomethyl)-9,9′-dihexyl-9H-fluorene [F-SH] was carried out under basic conditions at 100 °C in a mixture of MeOH and THF. The resulting polysulfides were then subjected to an oxidation reaction using m-CPBA, which was followed by the Ramberg-B?cklund reaction in the presence of CF2Br2/Al2O3-KOH, thus achieving the desired PFV. Similarly, PFVCV could be synthesized through the same three-step sequence employing, in this case, 2,7-bis(mercaptomethyl)-9-(tridecan-7-yl)-9H-carbazole (C-SH) and F-Br. Conjugated polymers with apparent molecular weights up to 15 kg mol-1 and exhibiting promising optical features were obtained following this convenient synthetic strategy.

Synthesis and characterization of thiophene and fluorene based donor-acceptor conjugated polymer containing 1,3,4-oxadiazole units for light-emitting diodes

A new donor-acceptor (D-A) conjugated polymer (PDTOF) containing 3,4-didodecyloxythiophene, fluorene and 1,3,4-oxadiazole units is synthesized by using Wittig reaction methodology. The synthesized polymer is characterized by 1H NMR, FTIR, GPC,

Photolumineseenee wavelength control of fluorene derivatives through h-bonding and protonation

A fluorene monomer, which comprised 4-pyridylcyanovinyl groups (FL-CNPy), was synthesized, and the photolumineseenee (PL) properties of FL-CNPy combined with various (di)acids were evaluated. Due to hydrogen (H)-bonding or protonation between the pyridine end groups and acids, the PL emission maxima varied from 460 to 557 nm according to the acidity (pKa) and type of (di)acid. Additionally, adjusting the ratio of FL-CNPy/(di)acid tuned the PL emission wavelength without modifying the materials. Copyright

Tunable fluorene-based dynamers through constitutional dynamic chemistry

Dynamic covalent imino-fluorene-based oligomers and polymers have been generated. They undergo constitutional recomposition under the effect of two parameters, acidity and ZnII metal ions. As a result, marked changes in physical properties take