174518-82-2

Upstream product

• 25245-34-5 1-bromo-2,5-dimethoxybenzene 
• 186134-38-3 2-bromo-5-iodo-4-methoxyphenol 
• 74-88-4 methyl iodide 
• 186134-37-2 3-iodo-4-methoxyphenyl 4-methylbenzenesulfonate 
• 98279-45-9 3-iodo-4-methoxyphenol 
• 3899-91-0 4-methoxyphenyl p-toluenesulfonate 

Downstream Products

• 861906-14-1 1-(2,5-Dimethoxy-phenylethynyl)-4-ethynyl-2,5-dimethoxy-benzene 
• 861906-15-2 C₃₀H₂₆O₆ 
• 203579-51-5 2-bromo-5-iodo-1,4-benzoquinone 

Relevant academic research and scientific papers

Molecular Wire Effects in Phenyleneethynylene Oligomers: Surprising Insights

The synthesis and quenching behavior of a series of water-soluble, carboxylate-carrying phenyleneethynylene oligomers—monomer to tetramer—and their polymers are reported; their quenching behavior with different test analytes (paraquat, lead salts, mercury

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

Synthesis of hydroxyalkyl-substituted, push-pull chromophores based on diphenylacetylenes and 1,4-bis(phenylethynyl)benzenes

Six new push-pull chromophores based on phenylacetylenes were prepared: two 1,2-diphenylacetylenes and four 1,4-bis(phenylethynyl)benzenes. The donor amino groups have hydroxyethyl substituents, and the acceptor groups are cyano or nitro. More soluble ver

Rigid molecular architectures that comprise a 1,3,5-trisubstituted benzene core and three oligoaryleneethynylene arms: Light-emitting characteristics and π conjugation between the arms

In view of increasing interest in light-emitting materials, we have investigated the light-emitting characteristics and occurrence of conjugation between arms of star-shaped rigid molecules that comprise a 1,3,5-triethynylbenzene core and methoxy group-su

Shape-persistent V-shaped mesogens - Formation of nematic phases with biaxial order

A homologous series of shape-persistent V-shaped molecules has been designed to form the biaxial nematic phase. Phenyleneethynylene moieties are attached to a bent fluorenone unit to create an apex angle of about 90°, which is determined from the single c

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

Banana-shaped oligo(aryleneethynylene)s: Synthesis and light-emitting characteristics

(Chemical Equation Presented) Pick of the bunch: Banana-shaped molecules 1 and 2 containing dimethoxybenzene and pyridine units are highly efficient emitters of violet light despite the interruption of the π conjugation because of meta substitution. The c

Multistep Reversible Redox Systems, LXIII. 2,5-Disubstituted N,N'-Dicyanoquinone Diimines (DCNQIs) - Syntheses, and Redox Properties

Quinones 1a-q and DCNQIs 2a-g have been synthesized in order to investigate substituent effects.It was necessary to employ novel synthetic routes for the introduction of iodine into 1f (7), the trifluoromethyl group into 1g-i, deuterium into 1m-p, and esp

Iodination of alkyl aryl ethers by mercury(II) oxide-iodine reagent in dichloromethane

A convenient method for selective mono- and diiodination of alkyl aryl ethers by mercury(II) oxide-iodine reagent in dichloromethane is reported.