Synthesis and characterization of coumarin-biphenyl derivatives as organic luminescent materials

• Three new coumarin-biphenyl derivatives were synthesized and characterized.
• b2 and b3 show bright blue-green emission.
• b2 exhibits better electroluminescent performance than b3.

Three new coumarin derivatives containing biphenyl group have been successfully synthesized and characterized by EA, IR and NMR. The photophysical properties of all derivatives were investigated by UV–vis and photoluminescence spectroscopic analysis. Their thermal stabilities were demonstrated by TGA. The doped light-emitting devices using the coumarin derivatives as dopants were fabricated. The results show that one of coumarin derivatives with coumarin-biphenyl skeleton would serve as promising luminescent materials.

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