115033-91-5

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General Description

2,7-diphenyl-9H-fluorene-9-one is a chemical compound with a molecular formula C25H16O. It is a derivative of fluorenone, a polycyclic aromatic hydrocarbon, and is composed of a fluorene framework with two phenyl rings attached to positions 2 and 7 on the fluorene core. 2,7-diphenyl-9H-fluorene-9-one is commonly used in organic synthesis and as a building block for the preparation of various organic materials, including polymers and liquid crystals. It has also been studied for its potential biological activities, particularly its potential as an anticancer agent. The compound has a yellow crystalline appearance and is typically handled and stored under standard laboratory conditions.

Upstream product

• 16218-30-7 2,7-diiodofluoren-9-one 
• 98-80-6 phenylboronic acid 
• 14348-75-5 2,7-dibromofluorene-9-one 
• 100-58-3 phenylmagnesium bromide 
• 6297-11-6 2,7-dichlorofluorenone 
• 28557-00-8 phenylzinc chloride 
• 3419-46-3 2,7-diphenyl-9H-fluorene 

Downstream Products

• 3419-46-3 2,7-diphenyl-9H-fluorene 

Relevant academic research and scientific papers

Self-assembled organic microfibers for nonlinear optics

While highly desired in integrated optical circuits, multiresponsive and tunable nonlinear optical (NLO) active 1D (sub)wavelength scale superstructures from organic materials are rarely reported due to the strong tendency of organic molecules to self-assembly in centrosymmetric modes. Here a solution-processed assembly approach is reported to generate non-centrosymmetric single-crystalline organic microfibers with a cumulative dipole moment for anisotropic combined second- and third-order NLO. Copyright

Green emission in ladder-type quarterphenyl: Beyond the fluorenone-defect

In polyfluorenes it is generally accepted that (photo)degradation leads to fluorenone type defects that accept the excitation energy and emit green-to-yellow light with rather low efficiency. Although initial spectroscopic studies suggest the same to hold

Reversible luminescence color switching in the crystal polymorphs of 2,7-bis(2′-methyl-[1,1′-biphenyl]-4-yl)-fluorenone by thermal and mechanical stimuli

Smart organic luminescence materials that exhibit a reversible stimuli-responsive change of luminescence color in the solid state without changing the chemical structure of their component molecules have attracted increasing interest. We employed the desi

Imidazole spiro-containing compound and application thereof

The invention relates to an imidazole spiro-containing compound and an application thereof. The compound has a structural general formula represented by chemical formula (1). The compound has the advantages of good stability, high luminous efficiency, long service life, and simplicity in synthesis.

Palladium supported SBA-functionalizd 1,2-dicarboxylic acid: The first Pd-based heterogeneous synthesis of fluorenones

The first Pd-based heterogeneous homo- and cross-coupling reactions for the fluorenones synthesis are reported. The palladium supported SBA-functionalizd 1,2-dicarboxylic acid (Pd@DCA-SBA) was prepared and characterized by the FT-IR, TGA, AAS, TEM, and EDS measurements. The prepared catalyst exhibited a high performance in some homo and cross coupling reactions for the synthesis of fluorenone derivatives using 2-bromo or 2,7-dibromo fluorenone in ethanol-water as green solvent medium.

Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials

Photochemical degradation is an important issue to be overcome in advancing the lifetime of fluorene-containing conjugated polymers. In order to optimize the inertness of the materials, a quantitative measure for the efficiency of degradation is needed. Here, we introduce a method to measure a relative quantum yield of the photochemical degradation by monitoring the kinetics of the process by means of UV/vis spectroscopy and liquid chromatography (LC) techniques. This method is employed to a set of differently substituted 2,7-diphenylfluorenes, serving as model compounds for polyfluorene materials. Our measurements show that the quantum yield changes by orders of magnitude upon varying the bridge substituents and that altered kinetics indicate changing degradation mechanisms.

Polymer for Preparing Resist Underlayer Film, Resist Underlayer Film Composition Containing the Polymer and Method for Forming Resist Underlayer Film Using the Composition

Provided are a fluoreneol-based monomer, a polymer for preparing a resist underlayer film obtained therefrom, a resist underlayer film composition containing the polymer, and a method for forming a resist underlayer film using the resist underlayer film composition, wherein the fluoreneol-based monomer is represented by Chemical Formula 2 below:

Selective and general exhaustive cross-coupling of di-chloroarenes with a deficit of nucleophiles mediated by a Pd-NHC complex

We report the first example of a general, exhaustive Pd-mediated cross-coupling of polychloroarenes in the presence of a deficit of nucleophiles, mediated by the highly active PEPPSI-IPent catalyst. Our results indicate that this catalyst system may be applicable to the pseudo-living polymerisation of chloroarene monomers.

Aggregation-induced bathochromic fluorescent enhancement for fluorenone dyes

Organic solid-state luminescence materials with aggregation-induced emission enhancement have attracted considerable interest in recent years. In this work, we develop a class of 2,7-diphenylfluorenone derivatives that exhibit prominent aggregation-induce

Fluorenone organic crystals: Two-color luminescence switching and reversible phase transformations between π-π Stacking-directed packing and hydrogen bond-directed packing

Organic solid-state luminescence switching (SLS) materials with the ability to reversibly switch the luminescence by altering the mode of molecular packing without changing the chemical structures of their component molecules have attracted considerable interest in recent years. In this work, we design and synthesize a new class of 2,7-diphenylfluorenone derivatives (compounds 1-6) that exhibit prominent aggregation-induced emission (AIE) properties with high solid-state fluorescence quantum yields (29-65%). Among them, 2,7-bis(4-methoxyphenyl)-9H-fluoren-9-one (2) and 2,7-bis(4-ethylphenyl)-9H- fluoren-9-one (6) display reversible stimuli-responsive solid-state luminescence switching. Compound 2 transforms between red and yellow crystals (the emission wavelength switches between 601 and 551 nm) under the stimuli of temperature, pressure, or solvent vapor. Similarly, compound 6 exhibits SLS behavior, with luminescence switching between orange (571 nm) and yellow (557 nm). Eight X-ray single-crystal structures, characterization of the photophysical properties, powder X-ray diffraction, and differential scanning calorimetry provide insight into the structure-property relationships of the solid-state fluorescence behavior. The results indicate that the variable solid-state luminescence of the fluorenone derivatives is attributed to the formation of different excimers in different solid phases. Additionally, the stimuli-responsive reversible phase transformations of compounds 2 and 6 involve a structural transition between π-π stacking-directed packing and hydrogen bond-directed packing. The results also demonstrate the feasibility of our design strategy for new solid-state luminescence switching materials: introduction of both π-π stacking and hydrogen bonding into an AIE structure to obtain a metastable solid/crystalline state luminescence system.