729569-84-0

Upstream product

• 14348-75-5 2,7-dibromofluorene-9-one 
• 100-44-7 benzyl chloride 
• 16433-88-8 2,7-dibromo-9H-fluorene 
• 100-39-0 benzyl bromide 

Downstream Products

• 203459-07-8 C₅₁H₄₀N₂ 

Relevant academic research and scientific papers

On the degradation process involving polyfluorenes and the factors governing their spectral stability

This study deals with an investigation of the spectral stability of differently structured polyfluorenes (PFs), deprived of 9-H defects, embodying 9,9-dialkylfluorene (P1), 9,9-diarylfluorene (P2), or 9,9-diarylfluorene/9,9- dibenzylfluorene units in a 1:1 alternating fashion (P3). Thermal annealing or UV irradiation carried out on films of P1-P3 in air revealed that their typical blue photoluminescence is invariably stained, independently of their 9-substitution, by the appearance of the low-energy band (g-band) pointing out a remarkable effect of light on the degradation process. A more comprehensive picture of the degradation pathway is proposed, including as key step a light-promoted formation of a PF radical cation generated by aerobic oxidation (photoluminescence test) or p-doping (cyclic voltammetry test). The blue emission of P1-P3 could successfully be preserved by dispersing them into a higher band gap matrix, such as polyvinylcarbazole (PVK), indicating a fundamental role of the intermolecular interactions between PF chains in the appearance of the low-energy emission band. Comparison between the optical behavior of suitably prepared PFs containing either fluorenone moieties (PFK) or 9-(bis-methylsulfanyl-methylene)fluorene moieties (PFS) holds regions of planarity within the PF backbone (inducing local intermolecular interactions) and not the fluorenone charge-transfer emission as responsible of the g-band of degraded PFs.

FLUORENE COMPOUND AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide a fluorene compound that can emit light with high emission quantum efficiency (quantum efficiency or quantum yield), and a method for producing the same and a use therefor. SOLUTION: A fluorene compound is represented by t

AMINE COMPOUND HAVING FLUORENE GROUP AS FRAMEWORK, PROCESS FOR PRODUCING THE AMINE COMPOUND, AND USE OF THE AMINE COMPOUND

Novel amine compounds that can be utilized as hole transport materials, hole injection materials or the like of organic electroluminescence devices, electrophotographic receptors or the like, and their production processes are provided. The novel amine compound is represented by the following general formula (1). In the formula, R 1 and R 2 each independently represents hydrogen atom, a linear, branched or cyclic alkyl group or alkoxy group, an aryl group, an aryloxy group or a halogen atom; Ar 1 and Ar 2 each independently represents a substituted or unsubstituted aryl group or heteroaryl group, and may form a nitrogen-containing heterocyclic ring together with the nitrogen atom bonded thereto; and Ar 3 each independently represents a substituted or unsubstituted phenyl group, naphthyl group, biphenylyl group, terphenylyl group, anthryl group, fluorenyl group or pyridyl group (except for amino-substituted groups); and M represents a single bond, an arylene group or a heteroarylene group.