852138-89-7 Usage
Description
4,4'-Dibromo-2,2'-diiodobiphenyl, with the chemical formula C12H6Br2I2, is an organic compound characterized by the presence of two bromine and two iodine atoms attached to a biphenyl core. This halogenated aromatic compound exhibits unique structural and electronic properties, making it a versatile building block in various chemical and material synthesis processes.
Uses
Used in Organic/Inorganic Heterofluorene Polymers:
4,4'-Dibromo-2,2'-diiodobiphenyl is utilized as a key building block in the synthesis of hybrid organic/inorganic heterofluorene polymers. Its unique combination of bromine and iodine atoms provides specific electronic and structural features that enhance the overall properties of the resulting polymers, such as improved charge transport, stability, and processability.
Used in Low Band-Gap Polymers for Photovoltaics:
In the photovoltaic industry, 4,4'-Dibromo-2,2'-diiodobiphenyl is employed as a component in the development of low band-gap polymers. These polymers are crucial for improving the efficiency of solar cells by enabling the absorption of a broader range of the solar spectrum. The incorporation of this compound into low band-gap polymers contributes to enhanced light-harvesting capabilities and overall device performance.
Synthesis
Synthesis of 4,4'-Dibromo-2,2'-diiodobiphenyl A solution of diamine (16.0 g, 46.8 mmol) and concentrated HCl (56.0 mL) in water (64.0 mL) was cooled to 0 °C. Next, 8.0g (116 mmol) of NaNO2 in 40 mL of water was added dropwise to the diamine solution over a period of 30 min, keeping the temperature at 0 °C. After the addition of NaNO2 was complete, the resulting mixture was stirred for an additional 30 min. and an aqueous solution of KI (77.7 g in 150 mL of water) at-5 °C was added dropwise over 30 min. The reaction mixture was then stirred (by mechanical stirrer) for 1h at r.t and 3 h at 60 °C, giving a dark brown solution. The solution was then cooled to 25 °C and the brown precipitate was collected by filtration. The crude brown solid was then purified by column chromatography (silica gel, hexane). The title compound as a white solid (7.4 g, 28 % yield). 1H NMR (CDCl3): δ (ppm) 7.04 (2H, d), 7.57 (2H, d), 8.11 (2H, s).
Check Digit Verification of cas no
The CAS Registry Mumber 852138-89-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,2,1,3 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 852138-89:
(8*8)+(7*5)+(6*2)+(5*1)+(4*3)+(3*8)+(2*8)+(1*9)=177
177 % 10 = 7
So 852138-89-7 is a valid CAS Registry Number.