18959-30-3

Usage

Uses

Used in Polymer Production:
4,5-Difluorophthalic anhydride is used as a monomer in the production of high-performance polymers, such as polyimides. Its presence in these polymers enhances their thermal and chemical resistance, making them suitable for applications in demanding industries.
Used in Electronics Industry:
In the electronics industry, 4,5-Difluorophthalic anhydride is used as a precursor in the synthesis of specialty chemicals that are vital for the development of advanced materials. These materials are employed in the fabrication of electronic components and devices, benefiting from the compound's ability to improve thermal and chemical stability.
Used in Aerospace Industry:
The aerospace industry also benefits from the use of 4,5-Difluorophthalic anhydride, as it is a key component in the creation of materials with superior thermal and chemical resistance. These materials are essential for the construction of aircraft and spacecraft, where high-performance materials are critical for safety and durability.
Used in Specialty Chemicals Synthesis:
4,5-Difluorophthalic anhydride is used as a precursor in the synthesis of various specialty chemicals. Its strong electron-withdrawing properties make it a valuable building block for the development of new compounds with specific properties tailored for use in different applications.
Safety Precautions:
It is important to handle 4,5-Difluorophthalic anhydride with care, as it can be a severe irritant to the eyes, skin, and respiratory system. Proper safety measures should be taken to minimize exposure and ensure the well-being of those working with 4,5-DIFLUOROPHTHALIC ANHYDRIDE.

InChI:InChI=1/C8H2F2O3/c9-5-1-3-4(2-6(5)10)8(12)13-7(3)11/h1-2H

Upstream product

• 18959-31-4 4,5-difluorophthalic acid 
• 56962-08-4 4,5-dichlorophthalic acid 
• 942-06-3 4,5-dichlorophthalic anhydride 

Downstream Products

• 83506-93-8 2-amino-4,5-difluorobenzoic acid 
• 83684-73-5 5,6-difluoroisoindoline-1,3-dione 
• 1454686-04-4 5,6-difluoro-1H-indene-1,3-(2H)-dione 
• 145286-17-5 4,5-Difluoro-phthalic acid 1-methyl ester 2-(2-thioxo-2H-pyridin-1-yl) ester 
• 878207-28-4 2-bromo-4,5-difluorobenzoic acid methyl ester 
• 64695-84-7 2-bromo-4,5-difluorobenzoic acid 
• 145286-16-4 2-Chlorocarbonyl-4,5-difluoro-benzoic acid methyl ester 
• 2083617-82-5 2–(5,6–difluoro–3–oxo–2,3–dihydro–1H–inden–1–ylidene)malononitrile 

Relevant academic research and scientific papers

High-efficiency synthesis method of halogenated 1, 3-indanedione compound

The invention relates to the technical field of new material synthesis, in particular to a novel efficient synthesis method of an organic photoelectric intermediate material. The method is characterized in that the synthesis technology is simple, efficient, easy to operate and good in repeatability. The specific synthesis details are as follows: halogenated phthalic acid which is very easy to obtain in industry is used as a raw material, and a corresponding anhydride is obtained after dehydration treatment; different acid anhydrides are reacted with ethyl acetoacetate or tert-butyl acetoacetate at room temperature, and then carboxyl is mildly removed in a hydrochloric acid aqueous solution to obtain the halogenated 1, 3-indanedione compound. Simple and efficient synthesis of the organic intermediates is achieved through the method, synthesis raw materials are easy to obtain, the synthesis process is simple, the path is short, and the synthesis cost is greatly reduced.

Design, Synthesis, and Photovoltaic Characterization of a Small Molecular Acceptor with an Ultra-Narrow Band Gap

The design of narrow band gap (NBG) donors or acceptors and their application in organic solar cells (OSCs) are of great importance in the conversion of solar photons to electrons. Limited by the inevitable energy loss from the optical band gap of the photovoltaic material to the open-circuit voltage of the OSC device, the improvement of the power conversion efficiency (PCE) of NBG-based OSCs faces great challenges. A novel acceptor–donor–acceptor structured non-fullerene acceptor is reported with an ultra-narrow band gap of 1.24 eV, which was achieved by an enhanced intramolecular charge transfer (ICT) effect. In the OSC device, despite a low energy loss of 0.509 eV, an impressive short-circuit current density of 25.3 mA cm?2 is still recorded, which is the highest value for all OSC devices. The high 10.9 % PCE of the NBG-based OSC demonstrates that the design and application of ultra-narrow materials have the potential to further improve the PCE of OSC devices.

Intermediates in the preparation of 4,5-difluoroanthranillic acid

Compounds of the formula STR1 which are intermediates in the preparation of 4,5-difluoroanthranilic acid, an intermediate itself in the synthesis of quinolone antibacterials, and methods of preparing these intermediates.

Synthesis of 2-bromo-4,5-difluorobenzoic acid

The synthesis of 2-bromo-4,5-difluorobenzoic acid was achieved from difluorophthalic anhydride by either using a Losen rearrangement or the Barton bromodecarboxylation reaction.