Synthesis and nonlinear optical properties of novel multi-branched and dendritic chromophores

• Main Authors: Chia-ling Hu, 胡嘉玲
• Other Authors: Tzu-Chau Lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/04694916514229910197

碩士 === 國立中央大學 === 化學研究所 === 97 === Several series of two-photon absorbing model chromophores with multi-branched and/or dendritic geometries were synthesized and characterized in the femtosecond and nanosecond time domain. The experimental results show that these model compounds exhibit strong two-photon activities within the spectral region of 700~850nm. It is also demonstrated that increasing the branch number within a molecule will lead to promoted two-photon absorptivity. Effective optical power restriction behaviors of these fluorophores were also investigated using nanosecond laser pulses and it was found that these dye molecules possess strong two-photon-assisted excited state absorption and could be potential candidates for broad-band optical limiters especially when against longer laser pulses.