作者:Gugu Kubheka、Kayode Sanusi、John Mack、Tebello Nyokong
DOI:10.1016/j.saa.2017.10.021
日期:2018.2
The optical limiting (OL) properties of 3,5-dipyrenylvinyleneBODIPY dyes that contain both electron withdrawing and donating moieties have been investigated by using the z-scan technique at 532nm in the nanosecond pulse range. The extension of the π-conjugation at the 3,5-positions with pyrenylvinylene groups results in a ca. 200nm red shift of the main BODIPY spectral band to ca. 700nm, so there is
通过使用ns扫描技术在532nm的纳秒脉冲范围内,研究了同时包含吸电子和给电子部分的3,5-二苯乙烯基乙烯基BODIPY染料的光学极限(OL)特性。带有吡啶基亚乙烯基的3,5-位上的π-共轭的延伸导致约1。主BODIPY光谱带向约200nm的红移。700nm,因此在环境光条件下在532nm处的吸收度相对较弱。响应于入射脉冲激光观察到反向饱和吸收率(RSA)曲线,这与CH2Cl2溶液中的两个光子吸收辅助的激发态吸收(ESA)机理一致,并且当染料嵌入聚(碳酸双酚A)中时( PBC)聚合物薄膜。这表明3