Study On Synthesis And Optical Properties Of Dentritic Chromophores With Triphenylamine

Organic materials with large conjugate"Ï€"bridge possess strong inner-molecule charge transfer possess not only strong fluorescence emission, but also intense two-photon absorption (TPA). So we synthesized two new chromophores as follows by Wittig, Heck reaction etc. And their structures have been confirmed by IR, MS and 1HNMR. Meanwhile, The triphenylamine derivatives with pyridine groups have been micro-fabricated under two-photon excitation.(1) Compounds with triphenylamine, named as G3-CHO and G3-COOH(2) Compounds with pyridine, named as PN-1, PN-2 and PN-3.The experimental results have shown as follows:1. The chromophores have strong fluorescence emission. The maximum fluorescence wavelength of the chromophores are red-shifted when the polarity of solvents and conjugation of chromophores increase.2. G3-CHO and G3-COOH were packed by metal nanoparticles, which can change the absorption and fluorescence intensity.3. A series of micro-objects were fabricated, such as micro-ox and 3D photonic crystals. Intermolecular electron-transfer from PN to acrylate resins was involved in the two-photon polymerization reaction, and confirmed by the Stern-Volmer equation and electrochemistry measurements.