2-bromo-9,9 '- spirobifluoren uygulaması

The molecular formula of 2-Bromo-9,9 '- spirobi [9H fluorescence] is C25H15Br, with a molecular weight of 395.29. It generally appears as a white crystalline solid with a strong odor. The chemical structure of 2-bromo-9,9 '- spirobifluorene contains two fluorene rings connected by a helical bridge, and one of the fluorene rings is substituted with a bromine atom. It is an organic semiconductor material with excellent optoelectronic properties.

Fiziksel ve kimyasal özellikler

Density: 1.522 g/cm3

Melting point: 184 ℃

Boiling point: 517.213 ℃ at 760 mmHg

Flash point: 259.774 ℃

uygulama

In the field of organic synthesis, 2-bromo-9,9 '- spirobifluorene can be reacted with lithium diphenylphosphine to synthesize diphenyl-2- (9,9' - spirobifluorenyl) phosphine with a total yield of 60.6% [1]. In the field of polymer chemistry, literature reports a cover layer molecular structure comprising a polymer structure bonded by a first central structure and a second central structure, wherein the first central structure is one of 9,9-dimethyl-2-bromofluorene, 2-bromo-9,9 '- spirobifluorene, and 2-bromo-9,9-diphenylfluorene; The second central structure is one of 3-p-toluene-4-m-toluenediamine and 4,4 '- di (3,5-dixylene) diphenylamine. This invention reduces the production cost and difficulty of OLED devices .

Regarding research

Choosing appropriate hole transport materials to insert between perovskite and metal electrodes can improve battery performance. Spiro OMeTAD, as a successful hole transport material, has been commonly used in the field of perovskite solar cells due to its excellent electron transport performance and stable redox properties. However, it still has certain shortcomings: complex molecular structure, difficult synthesis, and poor solubility in organic solvents. In order to compensate for the above shortcomings, researchers have developed hole transport materials with simple structure and better solubility, which is of great significance for the development of perovskite solar cells. Research has found that at a reaction temperature of 105 ℃ and a ratio of n (CZ-OMEAD): n (2-bromo-9,9 '- spirobifluorene): n (Pd2 (dba) 3): n (t-Bu) 3P · BF4): n (potassium tert butoxide)=1:1.2:0.08:2, the yield of the target product Spiro-014 can reach 89.1% after 24 hours of reaction. The optimal refining conditions are: m (toluene): m (n-hexane): m (crude product)=10:10:1, and the product purity of Spiro-014 obtained by direct thermal filtration at 70-75 ℃ can reach 99.7%, which can be used as a hole transport material in perovskite solar cells.