18733-91-0

Basic information

• Product Name: bis(4-broMophenyl)-diphenyl-silane
• Synonyms: bis(4-broMophenyl)-diphenyl-silane;1,1'-(Diphenylsilylene)bis[4-bromobenzene];NSC 168683
• CAS NO: 18733-91-0
• Molecular Formula: C₂₄H₁₈Br₂Si
• Molecular Weight: 494.29322
• EINECS: -0
• Mol File: 18733-91-0.mol
• Article Data: 29

Chemical Properties

• Melting Point: 167.0 to 171.0 °C
• Boiling Point: 494.4°Cat760mmHg
• Flash Point: 390.5°C
• Appearance: /
• Density: 1.49g/cm³
• Vapor Pressure: 1.97E-09mmHg at 25°C
• Refractive Index: 1.68
• CAS DataBase Reference: bis(4-broMophenyl)-diphenyl-silane(CAS DataBase Reference)
• NIST Chemistry Reference: bis(4-broMophenyl)-diphenyl-silane(18733-91-0)
• EPA Substance Registry System: bis(4-broMophenyl)-diphenyl-silane(18733-91-0)

Safety Data

• Hazardous Substances Data: 18733-91-0(Hazardous Substances Data)

Usage

General Description

Bis(4-bromophenyl)-diphenyl-silane is a chemical compound with the molecular formula C38H28Br2Si. It is a silane derivative with two 4-bromophenyl and two diphenyl groups attached to a central silicon atom. bis(4-bromophenyl)-diphenyl-silane is commonly used as a crosslinking agent in the production of silicone polymers and elastomers, as well as in the synthesis of organic materials and coatings. It is also used as a coupling agent in the manufacturing of composite materials. Bis(4-bromophenyl)-diphenyl-silane is known for its high thermal stability and resistance to oxidation, making it useful in various industrial and commercial applications. However, it is important to handle this compound with care as it may pose hazards to health and the environment if not used properly.

InChI:InChI=1/C24H18Br2Si/c25-19-11-15-23(16-12-19)27(21-7-3-1-4-8-21,22-9-5-2-6-10-22)24-17-13-20(26)14-18-24/h1-18H

Upstream product

• 106-37-6 1.4-dibromobenzene 
• 775-12-2 diphenylsilane 
• 80-10-4 diphenylsilyl dichloride 

Downstream Products

• 431070-74-5 4-[(4-bromophenyl)diphenylsilyl]phenylacetylene 
• 916436-12-9 4,4'-(diphenylsilanediyl)bis(4,1-phenylene)diboronic acid 
• 1415935-14-6 bis(4-(2,3-di(pyridin-2-yl)pyrido[2,3-b]-pyrazin-7-yl)phenyl)diphenylsilane 
• 1579955-06-8 2-(4’-((4-(9H-carbazol-9-yl)phenyl)diphenylsilyl)-(1,1’-biphenyl)-4-yl)-1-phenyl-1H-phenanthro[9,10-d]imidazole 
• 1579955-07-9 2-(4’-((4-(9H-[3,9’-bicarbazol]-9-yl)phenyl)diphenylsilyl)-(1,1’-biphenyl)-4-yl)-1-phenyl-1H-phenanthro[9,10-d]imidazole 
• 848464-60-8 9,9'-[(diphenylsilanediyl)bis(4,1-phenylene)]bis-9H-carbazole 

Relevant articles and documents

Conjugation-broken thiophene-based electropolymerized polymers with well-defined structures: effect of conjugation lengths on electrochromic properties

A series of monomers containing tetraphenylsilane connected to different thiophenes such as thiophene, bithiophene and terthiophene were designed and synthesized and were further used to prepare the corresponding polymers via electrochemical polymerization (pSiTPTP, pSiTPBTP and pSiTPTTP). From the polymers, the effective conjugate elements were well defined as bithiophene, quaterthiophene and sexithiophene because the sp3 Si atom can block the conjugation between the thiophene units in the polymer backbone. The spectroelectrochemical results indicated that pSiTPTP is incapable of electrochromism, which may be attributed to the insufficient conjugation length of the independent bithiophene. In contrast, both pSiTPBTP and pSiTPTTP exhibited obvious electrochromic properties and furthermore, pSiTPTTP displayed a shorter switching time and better stability. Such different electrochemical behaviors can be ascribed to the looser stacking structure and lower oxidation potential of pSiTPTTP with the independent sexithiophene unit. The EIS measurements also confirmed the lower charge-transfer resistance and higher ion-diffusion rate of pSiTPTTP with the independent sexithiophene unit. Hence, we can conclude that the effects of the electrochromic behavior of the conjugation-broken polythiophene derivatives depend on the increased conjugation length of the thiophene repeating unit, in which the inadequate electrochromism with bithiophene units can change to superior electrochromic properties with increased sexithiophene units.

Iridium complex grafted to 3,6-carbazole-alt-tetraphenylsilane copolymers for blue electrophosphorescence

We designed a 3,6-dibromo-9-hexyl-9H-carbazole derivative with the blue emissive iridium complex bis[2-(4,6-difluorophenyl)pyridyl-N,C 2′](picolinato)iridium(III) (Flrpic) linked at the alkyl terminal. Based on this monomer, novel 3,6-carbazole-alt-tetraphenylsilane copolymers grafted with Flrpic were synthesized by palladium-catalyzed Suzuki coupling reaction, and the content of Flrpic in the polymers could be controlled by feed ratio of the monomers. The polymer films mainly show blue emission from Flrpic, and the emission intensity from the polymer backbones is much weaker compared with the doped analogues, which demonstrates an efficient energy transfer from polymeric host to covalently bonded guest. The phase separation in the polymers was suppressed, which can be identified by atomic force microscopy and designed electroluminescent (EL) devices. EL devices based on the polymers exhibited blue phosphorescence from Flrpic. The luminous efficiency of preliminary devices reached 2.3 cd/A, and the efficiency roll-off at high current densities was suppressed.

Silicon-based compound and organic light emitting diode comprising the same

A silicon compound and an organic light emitting device including the same are. disclosed. (by machine translation)