1,4-BIS(PHENYLETHYNYL)BENZENE

1,4-Bis(phenylethynyl)benzene (CAS No. 1849-27-0) The value of this compound lies in its rigid, fully conjugated π-system, composed of a central benzene ring symmetrically substituted with two phenylethynyl groups. This extended conjugation endows the molecule with excellent electronic delocalization, thermal stability, and optoelectronic properties, making it a key functional material rather than a simple structural intermediate.

Primary Application Fields

Organic Electronic & Optoelectronic Materials

Function:
Acts as a π-conjugated building block with high planarity and rigidity, facilitating efficient charge transport and light–matter interaction.

Effect:
Enhances charge mobility, photoluminescence efficiency, thermal stability, and molecular ordering in organic electronic systems.

Application Examples:

• OLED materials: Used as a core structure or dopant in emissive or charge-transport layers

• Organic semiconductors: Applied in small-molecule or polymer semiconductor research

• Photonic materials: Suitable for nonlinear optical and fluorescence-based applications

High-Performance Polymer & Advanced Materials Research

Function:

Its rigid aromatic–ethynyl structure serves as a structural reinforcement unit in advanced polymer backbones or cross-conjugated systems.

Effect:

Improves thermal resistance, mechanical rigidity, and dimensional stability of high-performance materials.

Application Examples:

• Functional monomers for conjugated polymers

• Reinforcing units in high-temperature resistant materials

• Components in liquid crystalline or ordered molecular systems

Organic Synthesis & Molecular Engineering Intermediate

Function:

The terminal phenyl–ethynyl motifs provide synthetic versatility, allowing further functionalization via coupling, substitution, or cyclization reactions.

Application:

A valuable intermediate for constructing:

• Extended π-conjugated frameworks

• Fluorescent probes and molecular sensors

• Custom-designed optoelectronic molecules