1190963-83-7

Basic information

• Product Name: 4,4’-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))dibenzaldehyde
• CAS NO: 1190963-83-7
• Molecular Weight: 394.427
• Mol File: 1190963-83-7.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: 4,4’-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))dibenzaldehyde(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4’-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))dibenzaldehyde(1190963-83-7)
• EPA Substance Registry System: 4,4’-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))dibenzaldehyde(1190963-83-7)

Safety Data

• Hazardous Substances Data: 1190963-83-7(Hazardous Substances Data)

Upstream product

• 1122-91-4 4-bromo-benzaldehyde 
• 51560-21-5 1,4-diiodo-2,5-dimethoxybenzene 
• 63697-96-1 4-Ethynylbenzaldehyde 
• 77123-57-0 4-[(trimethylsilyl)ethynyl]bezaldehyde 
• 74029-40-6 1,4-diethynyl-2,5-bis(methoxyl)benzene 

Relevant articles and documents

Efficient sensing of explosives by using fluorescent nonporous films of oligophenyleneethynylene derivatives thanks to optimal structure orientation and exciton migration

The fluorescence of thin films of a diimine-substituted phenyleneethynylene compound can be efficiently quenched by nitroaromatic vapors, which is not the case for the unsubstituted parent compound. Thin-film porosity is usually considered to be an essential factor for efficient quenching, but in the present case the origin of the quenching is completely different, as both films are nonporous and hermetic to 2,4-dinitrotoluene (DNT) molecules. The molecular organization in the two crystallized thin films offers a low level of p stacking for both compounds, but the orientation of the phenylenethynylene fluorophore differs markedly with respect to the surface of the films. For the substituted compound, the fluorophore is almost parallel to the surface, thus making it readily available to molecules of a nitroaromatic quencher. This rationale is also observed in the case of a related compound bearing methoxy side chains instead of the long octyloxy moieties. Fluorescence-lifetime experiments show that the efficient quenching process in the nonporous crystallized films of the substituted compound is due to a fast (70 ps) diffusion of excitons from the bulk of the film toward the surface where they are quenched, thus providing evidence of antenna effects.

CONJUGATED OLIGOMER-BASED MACROCYCLES FOR LIVE CELL IMAGING

A phenyleneethynylene macrocycle (PEMC) is constructed that is a cyclic or polycyclic oligo (oligophenyleneethynylene-co-polyamine) where a monodispersed oligophenyleneethynylene is coupled with a polyamine. The PEMC is formed by coupling a monodispersed di-aldehyde end-capped oligophenyleneethynylene with a polyamine to form a macrocyclic imine and reducing the imine to an amine. The PEMC is useful at entering living cells for the fluorescence imaging of the living cells without toxicity to the cells.