27192-91-2

Basic information

• Product Name: 2,2',7,7'-TetrabroMo-9,9'-bifluorenylidene
• Synonyms: 2,2',7,7'-TetrabroMo-9,9'-bifluorenylidene
• CAS NO: 27192-91-2
• Molecular Formula: C₂₆H₁₂Br₄
• Molecular Weight: 643.98948
• Mol File: 27192-91-2.mol

Chemical Properties

• Melting Point: 455°C(lit.)
• Boiling Point: 655.5±55.0 °C(Predicted)
• Appearance: /
• Density: 1.985±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 2,2',7,7'-TetrabroMo-9,9'-bifluorenylidene(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2',7,7'-TetrabroMo-9,9'-bifluorenylidene(27192-91-2)
• EPA Substance Registry System: 2,2',7,7'-TetrabroMo-9,9'-bifluorenylidene(27192-91-2)

Safety Data

• Hazardous Substances Data: 27192-91-2(Hazardous Substances Data)

Usage

Uses

Used in Organic Electronics:
2,2',7,7'-TetrabromoMo-9,9'-bifluorenylidene is used as an electron acceptor in organic electronics for its ability to facilitate charge transport and improve the overall performance of electronic devices. Its unique structure allows for efficient charge separation and transfer, which is crucial for the functioning of organic electronic components.
Used in Solar Cells:
In the solar cell industry, 2,2',7,7'-TetrabromoMo-9,9'-bifluorenylidene is utilized as an electron acceptor to enhance the efficiency of solar energy conversion. Its incorporation into solar cell materials can lead to improved light absorption and charge separation, ultimately contributing to higher power conversion efficiencies in solar panels.
By understanding the description and uses of 2,2',7,7'-TetrabromoMo-9,9'-bifluorenylidene, we can appreciate its significance in the development of advanced organic electronic devices and solar cell technologies. Its electron acceptor properties play a crucial role in improving the performance and efficiency of these applications, making it a valuable compound in the field of materials science and renewable energy.

Upstream product

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• 23346-72-7 2,7,2'',7''-tetrabromo-[9,9';9',9'']terfluorene 
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Downstream Products

• 16433-88-8 2,7-dibromo-9H-fluorene 

Relevant articles and documents

9,9′-Bifluorenylidene-Core Perylene Diimide Acceptors for As-Cast Non-Fullerene Organic Solar Cells: The Isomeric Effect on Optoelectronic Properties

Two different non-fullerene small-molecule acceptors, m-PIB and p-PIB, based on 9,9′-bifluorenylidene (BF) and perylene diimide (PDI) were designed and synthesized. Four β-substituted PDIs were linked to BF in different positions. Based on DFT analysis, derivative p-PIB exhibited reduced intramolecular twisting between the PDI moieties, more delocalized wave function, and sufficiently wider π-electron delocalization than that of m-PIB. The absorption ability of p-PIB was enhanced due to increased intermolecular interactions. By blending p-PIB with poly{4,8-bis[5-(2ethylhexyl)thiophen-2-yl]benzo[1,2-b:4,5-b′]dithiophene-co-3-fluorothieno[3,4-b]-thiophene-2-carboxylate} (PTB7-Th), organic solar cells (OSCs) based on p-PIB obtained a maximum power conversion efficiency of 5.95 % without any treatments. Due to the improved and balanced hole and electron mobilities, the short-circuit current and fill factor of OSCs based on PTB7-Th and p-PIB were significantly increased. The AFM and TEM results revealed that the PTB7-Th:p-PIB film had favorable nanoscale phase separation and formed a bicontinuous interpenetrating network.

Highly Efficient Perovskite Solar Cells Employing an Easily Attainable Bifluorenylidene-Based Hole-Transporting Material

The 4,4′-dimethoxydiphenylamine-substituted 9,9′-bifluorenylidene (KR216) hole transporting material has been synthesized using a straightforward two-step procedure from commercially available and inexpensive starting reagents, mimicking the synthetically

ELECTROACTIVE MATERIALS, PRINTING COMPOSITIONS AND METHODS OF MANUFACTURING SOLAR CELLS

The present disclosure relates to electroactive materials such as hole transport materials (HTMs) for use in solar cells, for example solid state organic/hybrid solar cells such as solid state perovskite solar cells. The present disclosure also relates to

Strain and hueckel aromaticity: Driving forces for a promising new generation of electron acceptors in organic electronics

(Figure Presented) Straining at the leash: The main features of electron-accepting materials with a 9,9′-bifluorenylidene backbone are strain relief and a gain in aromaticity. These dimers (see picture) exhibit absorption near the red spectral region (ca. 600 nm) and HOMO (5.58-5.06 eV) and LUMO (3.37-3.09 eV) energy levels, which, together with high solubility and thermal stability render these materials attractive acceptors for bulk heterojunction (BHJ) solar cells.

BIFLUORENYLIDENE DERIVATIVES, THEIR PREPARATION AND USES THEREOF

The invention relates to bifluorenylidene derivatives and their corresponding radical anions and radical-cations of the following general formula (II): wherein: Y = C=O and m is an integer ≥0, preferably m = 1, with the proviso that when m = 0, A = borany

W(CO)6-Mediated Desulfurdimerization of Dithioketals. Evidence for a Thione Intermediate

Upon treatment with W(CO)6, dithioketals undergo desulfurdimerization to give the corresponding dimeric olefins in good to excellent yields.The mechanism of this the newly discovered reaction has been investigated.Thioketones have been isolated from the reactions of highly crowded dithioketals.The mechanism for the formation of thioketones has been shown to occur via a new type of radical fragmentation process of dithiolane.Thermolysis of 2,2-dimethylindan-1-yl 2-thiophenoxyethyl sulfide in the presence of tert-butyl adamantane-1-peroxycarboxylate (a typical radical initiator) has been studied for comparison.Thioketones react with W(CO)6, giving dimeric olefins and/or undergoing carbene-like insertion reactions.

Desulphurisation-Dimerisation of Dithioacetals with W(CO)6

Dithioacetals undergo desulphurisation-dimerisation to give the corresponding dimeric alkenes in good to excellent yields on treatment with W(CO)6.