1070162-89-8

Basic information

• Product Name: 4-(2,5-dimethoxyphenylethynyl)-2,5-dimethoxybromobenzene
• Synonyms: 4-(2,5-dimethoxyphenylethynyl)-2,5-dimethoxybromobenzene
• CAS NO: 1070162-89-8
• Molecular Weight: 377.235
• Mol File: 1070162-89-8.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 4-(2,5-dimethoxyphenylethynyl)-2,5-dimethoxybromobenzene(CAS DataBase Reference)
• NIST Chemistry Reference: 4-(2,5-dimethoxyphenylethynyl)-2,5-dimethoxybromobenzene(1070162-89-8)
• EPA Substance Registry System: 4-(2,5-dimethoxyphenylethynyl)-2,5-dimethoxybromobenzene(1070162-89-8)

Safety Data

• Hazardous Substances Data: 1070162-89-8(Hazardous Substances Data)

Upstream product

• 531504-78-6 [(2,5-dimethoxyphenyl)ethynyl]trimethylsilane 
• 186134-37-2 3-iodo-4-methoxyphenyl 4-methylbenzenesulfonate 
• 186134-38-3 2-bromo-5-iodo-4-methoxyphenol 
• 98279-45-9 3-iodo-4-methoxyphenol 
• 25245-35-6 1-iodo-2,4-dimethoxybenzene 
• 3899-91-0 4-methoxyphenyl p-toluenesulfonate 
• 22944-08-7 2-ethynyl-1,4-dimethoxybenzene 
• 174518-82-2 1-bromo-4-iodo-2,5-dimethoxybenzene 

Downstream Products

• 861906-15-2 C₃₀H₂₆O₆ 
• 861906-14-1 1-(2,5-Dimethoxy-phenylethynyl)-4-ethynyl-2,5-dimethoxy-benzene 

Relevant articles and documents

How the π conjugation length affects the fluorescence emission efficiency

How the π conjugation length affects the fluorescence emission efficiency is elucidated by examination of the theoretical and experimental relationship between absolute quantum yield (Φf) and magnitude (Aπ) of the π conjugation lengt

Light-emitting efficiency tuning of rod-shaped π conjugated systems by donor and acceptor groups

In view of the increasing importance of highly efficient light-emitting materials in chemistry, biological science, and materials science, we investigated the light-emitting efficiency tuning of rod-shaped oligo(p-phenylene ethynylene)s (OPEs, trimeric to pentameric systems) by donor and acceptor groups, so that they emit the very intense fluorescence (Φf ≈ 1.0, log ε ≈ 5) at 460 nm as the desired wavelength region. This goal was achieved by side modification by MeO (donor) groups and end modification by a CN-substituted benzene ring or CF3-substituted pyridine ring (acceptor) of tetrameric p-phenylene ethynylene rod-shaped molecules (Φf = 0.96, λem = 458 nm, log ε = 4.96 for the former and Φf = 0.99, λem = 459 nm, log ε = 4.92 for the latter). The high Φf values for 11 and 12 are interpreted in terms of kr (radiative rate constant) and kd (radiationless rate constant). The linear relationship with a positive slope between Φf and the Hammett σ constant was found for the first time. It is found that kd rather than kr varies with σp-X. The photophysical properties (Φf, λem, λabs, log ε) were not so altered with the solvent polarity, which could be explained by the dipole moments in the excited and ground states. The results would be valuable for the molecular design of highly efficient light-emitting materials. Copyright