439791-57-8

Basic information

• Product Name: 2,7-dibroMo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene]
• Synonyms: 2,7-dibroMo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene]
• CAS NO: 439791-57-8
• Molecular Formula: C₃₃H₃₀Br₂
• Molecular Weight: 586.3993
• Mol File: 439791-57-8.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2,7-dibroMo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene](CAS DataBase Reference)
• NIST Chemistry Reference: 2,7-dibroMo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene](439791-57-8)
• EPA Substance Registry System: 2,7-dibroMo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene](439791-57-8)

Safety Data

• Hazardous Substances Data: 439791-57-8(Hazardous Substances Data)

Usage

General Description

2,7-dibromo-2',7'-di-tert-butyl-9,9'-spirobi[fluorene] is a chemical compound that consists of two spirobifluorene units connected by two tert-butyl groups. The presence of bromine atoms on the spirobifluorene backbone increases the reactivity of the compound, making it useful in various organic synthesis reactions. The tert-butyl groups provide steric hindrance, which can influence the compound's solubility and stability. This chemical has potential applications in organic electronics, optoelectronic devices, and as a building block for creating novel materials with unique properties. Furthermore, its spirobifluorene framework makes it an interesting molecule for studying the structure-property relationships of organic materials.

Upstream product

• 92-52-4 biphenyl 
• 14348-75-5 2,7-dibromofluorene-9-one 
• 1625-91-8 4,4'-di-tert-butylbiphenyl 
• 70728-89-1 2-bromo-4,4'-di-tert-butylbiphenyl 

Downstream Products

• 1365480-11-0 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolanyl)-7-(4-diphenylamino-styryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-99-7 2-(p-phenylselanylphenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-96-4 2-(p-phenylthiophenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-93-1 2-(p-phenoxyphenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-90-8 2-(p-diphenylaminophenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-87-3 2-(p-triphenylsilylphenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-84-0 2-(p-triphenylmethylphenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 1365479-81-7 2-(3,5-di-tert-butylphenyl)-7-(4-diphenylaminostyryl)-2',7'-di-tert-butyl-9,9'-spirobifluorene 
• 862694-81-3 N,N'-diphenyl-[(2',7'-di-tert-butyl)-9,9'-spirobifluorene]-2,7-diamine 

Relevant articles and documents

tert-Butylated spirobifluorene derivative incorporating triphenylamine groups: A deep-blue emitter with high thermal stability and good hole transport ability for organic light emitting diode applications

Abstract A tert-butylated spirobifluorene derivative incorporating triphenylamine groups was synthesized starting from the readily available reagent biphenyl. Without any hole-transport layer, an unoptimized double-layer device exhibits excellent electroluminescent performances with a radiance of 3013 cd/m2 at 9.8 V, a maximum electroluminescent efficiency of 1.71 cd/A, a maximal external quantum efficiency of 2.58% at a brightness of 4.8 cd/m2, narrow full width at half-maximum (54 nm), and blue emission with Commission Internationale de l'Eclairage coordinates of (0.152, 0.103), which is close to the standard for blue. Compared to the reported organic light emitting diodes materials, the molecule displays very high thermal stability. In addition, the bilayer device showed a greatly improved performance as compared to a trilayer device with NPB as hole-transporting layer, which indicated that the molecule possesses good hole transport ability and can be good candidate for hole-transporting layer in organic light emitting diodes.

Synthesis and characterization of highly soluble and oxygen permeable new polyimides based on twisted biphenyl dianhydride and spirobifluorene diamine

The novel spirobifluorene diamine monomer, 2,7-bis-amino-2′,7′- di-tert-butyl-9,9′-spirobifluorene, was obtained. The new organosoluble polyimides were prepared from spirobifluorene diamine containing bulky tert-butyl group and conventional dianhydrides as well as 2,2- ′bis(4″-tert-butylphenyl)4,4′,5,5′- biphenyltetracarboxylic dianhydride (BBBPAn) and 2,2′-bis(4″- trimethylsilylphenyl)-4,4′,5,5′biphenyltetracarboxylic dianhydride (BTSBPAn), which are composed of a noncoplanar twisted biphenyl unit containing bulky p-tert-butylphenyl groups and/or p-trimethylsilylphenyl groups by high-temperature one step polymerization. The structures of polymers were confirmed by various spectroscopic techniques. The weight-average molecular weights and polydispersities of resulting polymers were in the ranges 48 300-183 900 and 2.10-3.26, respectively. The bulky and twisted noncoplanar structural feature confers an enhanced solubility of the polyimides because of a decrease in the degree of molecular packing and crystallinity while imparting a significant increase in both Tg and thermal stability by restricting segmental mobility. The new polyimides exhibit the high oxygen permeabilities (P(O2) = 18-121 barrer) and O2/N2 gas separation properties (P(O2)/P(N2) = 2.2-9).