Two-Photon Absorption and Excited State Dynamics of Two Organic Molecules Containing Donor/ Acceptor Moieties

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2008,（7）
• 页码范围: 2456-2459
• 页数: 4页
• 语种: 英文

摘要

o new two-photon absorption (TPA) molecules, named SK-G1 and NT-G1, are synthesized and the photo-physical characteristics are investigated by using linear absorption spectra, one-photon fluorescence spectra and two-photon excited fluorescence spectra. Both the compounds exhibit TPA properties, and the TPA values determined by z-scan measurement are 10GM and 39GM for SK-G1 and NT-G1, respectively, at wavelength 800nm. Time-resolved spectroscopic techniques are employed to further explore the excited state dynamics of NT-G1 with larger TPA cross section. The research results show that there is an ultrafast intraband energy transfer process (about 3ps) before the formation of charge transfer state with a relatively long lifetime.