Synthesis and second-order optical nonlinearity of carbazolyl-substituted furan chromophores with high thermal stability and good transparency

A series of new chromophores, in which N-hexylcarbazole acts as an electron donor and a furan ring is part of a conjugation bridge, are synthesised, and exhibit similar values of the first molecular hyperpolarisability, but better transparency compared with their analogues which contain diethylaminophenyl instead of N-hexylcarbazole as the donor, in addition to high thermal stability.