Replacement of the open chain dithienylethylene
Ï-conjugating spacer by its bridged analog in pushâpull NLO-phores
produces a dramatic increase of the quadratic hyperpolarisability.
在推拉式 NLO 荧光中,用其桥接类似物取代开链二噻吩乙烯Ï-共轭间隔物,可显著提高二次超极性。
Design and Synthesis of Push−Pull Chromophores for Second-Order Nonlinear Optics Derived from Rigidified Thiophene-Based π-Conjugating Spacers
Two series of push-pullchromophores built around thiophene-based pi-conjugating spacersrigidified either by covalent bonds or by noncovalent intramolecular interactions have been synthesized and characterized by UV-vis spectroscopy, electric field induced second harmonic generation (EFISH) and differential scanning calorimetry. Comparison of the linear and second-ordernonlinear optical properties