Chemists have found a solution to a problem that is more than 100 years old --- how to couple two unactivated carbon atoms together with the help of a catalyst. The molecules formed --- called biaryl molecules --- are the building blocks of light emitting diodes (LEDs), electron transport devices and liquid crystals found in modern LCD screens, and are found in approximately one in 20 medicines on the market today, such as Vancomycin, a last resort antibiotic and Glivec, an anti-cancer agent.