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Usage

Uses

Used in Optoelectronic Industry:
Spiro[fluorene-9,9'-xanthene] is used as a key component in the development of organic light emitting diodes (OLEDs) for its high thermal stability and electron transporting properties, which are crucial for the performance and longevity of these devices.
Used in Material Science:
In the field of material science, Spiro[fluorene-9,9'-xanthene] is utilized for its unique properties, contributing to the advancement of new materials with potential applications in various technological areas, including but not limited to optoelectronics.

Upstream product

• 859933-74-7 9-hydroxy-9-(2-phenoxy-phenyl)-fluorene 
• 64-19-7 acetic acid 
• 75-36-5 acetyl chloride 
• 486-25-9 9-fluorenone 
• 108-95-2 phenol 
• 92-83-1 xanthene 
• 1016-05-3 dibenzothiophene sulfone 

Relevant academic research and scientific papers

Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications

Four heterocyclic spiro-type hole transporting materials (HTMs) carrying a spiro[fluorene-9,9′-xanthene] (SFX) (SFX-TPAM and SFX-TPA) or spiro[fluorene-9,9′-thioxanthene] (SFT) unit (SFT-TPAM and SFT-TPA) were synthesized through a low-cost facile route with high yields for perovskite solar cell (PSC) applications. In terms of absorption, these four compounds in the film state are all transparent at wavelengths longer than 430 nm, which is beneficial for allowing visible light to reach the perovskite active layer without being absorbed by the hole transporting layer (HTL). The photovoltaic performance of the inverted PSCs based on these small molecular HTMs with the device architecture of glass/ITO/HTL/CH3NH3PbI3/C60/BCP/Ag was tested. Only SFX-TPAM had its highest occupied molecular orbital (HOMO) level matched with the valence band of CH3NH3PbI3. The inverted PSC based on a dopant-free SFX-TPAM HTL achieves a power conversion efficiency of 10.23% under the illumination of standard one sun lighting, which is better than that (8.17%) of the cell based on dopant-free spiro-OMeTAD. The better photovoltaic performance of SFX-TPAM compared to spiro-OMeTAD may be due to the MAPbI3 film deposited on it having better quality. These results indicate that the facilely synthesized, low-cost SFX based small molecules can be used as the HTMs for PSCs.

A Significantly Twisted Spirocyclic Phosphine Oxide as a Universal Host for High-Efficiency Full-Color Thermally Activated Delayed Fluorescence Diodes

A universal thermally activated delayed fluorescence (TADF) host, 4′-diphenylphosphinoylspiro[fluorene-9,9′-xanthene] (SFXSPO), is constructed with a highly distorted and asymmetric configuration and disordered molecular packing in its solid state. SFXSPO

Unexpected one-pot method to synthesize spiro[fluorene-9,9′-xanthene] building blocks for blue-light-emitting materials

An unexpected one-pot synthetic approach toward spiro[fluorene-9,9′- xanthene] (SFX) under excessive MeSO3H conditions has been developed. The key step involves a thermodynamically controlled cyclization reaction. Blue-light-emitting materials based on SFX building blocks that exhibit high thermal stability have also been synthesized.

Method for synthesizing spirofluorene xanthene based on microreactor

The invention provides a method for synthesizing spirofluorene xanthene based on a microreactor, namely, in a microreactor, a proportional fluorenone derivative and a phenolic derivative are introduced, and under acid catalysis 140 - 180 °C reaction 5 - 410 minutes, through F-C cyclization reaction, the solvent is screened through screening. A multi-substituted or multi-functionalized spirofluorene xanthene aromatic hydrocarbon is synthesized by regulating the flow rate, regulating the mole ratio and the like in one step. Compared with the traditional method, the method provided by the invention greatly shortens the reaction time, shortens the reaction time from 24 hours to 46 minutes, improves the production efficiency, and improves the yield of spirofluorene xanthene to 72%. The method has the advantages of accessible raw materials, simple operation, high yield, atomic economy and the like, and is not only suitable for continuous synthesis in laboratories, but also capable of easily realizing industrial macro preparation.

SFX as a low-cost 'Spiro' hole-transport material for efficient perovskite solar cells

Four spiro[fluorene-9,9′-xanthene] (SFX) derivatives, SFX-TAD, SFX-TCz, SFX-TPTZ and SFX-MeOTAD have been synthesized for use as hole-transport materials and fully characterized by 1H/13C NMR spectroscopy, mass spectrometry, XRD and

Synthesis of spirocyclic diarylfluorenes by one-pot twofold SNAr reactions of diaryl sulfones with diarylmethanes

Treatment of dibenzothiophene dioxides with cyclic diarylmethanes in the presence of KN(SiMe3)2 results in the formation of fluorene-based spirocyclic tetraarylmethanes in a single operation. The transformation would proceed via an intermolecular SNAr reaction of the dioxides with cyclic diarylmethylpotassium followed by intramolecular SNAr cyclization. This straightforward strategy provides a wide range of spirocyclic diarylfluorenes including unusual ones that are otherwise difficult to synthesize.

Chlorination process, alkylation of products of said process and some products thereof

Compounds having acidic protons and a molecular structure which can delocalize the electron density of the conjugate base (target compounds) are chlorinated by contacting such compounds with a perchloroalkane and aqueous base in the presence of a phase transfer catalyst which is an tetraalkylammonium hydroxide. Chlorinated products, preferably gem-dichloro compounds, are produced. The gem-dichloro compounds are useful for alkylation of aromatic compounds. For instance fluorene is chlorinated to form 9,9-dichlorofluorene which is reacted with such compounds as phenol or aniline to form such compounds as 9,9-bis(hydroxyphenyl)fluorene, 9,9-bis(aminophenyl)fluorene, or 9-aminophenyl-9-chlorofluorene.