摘要
以2-甲基蒽醌为原料,经锌粉还原、溴素溴化和醋酸钯催化的Heck偶联反应合成了以刚性、平面性良好的蒽环分子为电荷转移中心,三苯胺为枝的MAn-G1和MAn-G2,其结构经核磁共振波谱(1 H NMR、13 C NMR)、红外光谱(IR)和质谱(MS)表征,并研究了MAn-G1和MAn-G2的线性和非线性光学性质。结果表明:随着多枝化程度的提高,分子的单光子吸收能力和荧光量子产率分别提高了6.0倍和2.2倍。在飞秒激光脉冲激发下,MAn-G2的双光子上转换荧光明显增强,相对于一代MAn-G1的双光子吸收截面(164 GM),二代MAn-G2的双光子吸收截面(8005 GM)增大了49.0倍。
Two dendrimers MAn-G1 and MAn-G2 with triphenylamine as branch and anthracene-2-methyl as core were prepared from 2-methylanthraquinone by zinc powder reduction,bromination with bromine and palladium catalyzed Heck coupling reaction,and characterized by nuclear magnetic resonance spectroscopy(1 H NMR,13 C NMR),infrared spectroscopy(IR)and mass spectrometry(MS).The linear and non-linear optical properties were studied.With the increase of generation number,the molar absorbance,fluorescence quantum yields are enhanced by 6.0 and 2.2-fold,respectively.Under the action of femtosecond laser pulse,the two-photon upconversion fluorescence of MAn-G2 is significantly enhanced.The two-photon absorption cross-section of MAn-G2(164 GM)is 49.0-fold higher than that of MAn-G1(8005 GM).
作者
谢焕然
王筱梅
梁作芹
XIE Huanran;WANG Xiaomei;LIANG Zuoqin(School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《合成化学》
CAS
2023年第4期290-295,共6页
Chinese Journal of Synthetic Chemistry
基金
国家自然科学基金资助项目(51803147)。
关键词
蒽核
三苯胺多枝分子
合成
双光子吸收
还原
溴化
电荷转移
anthracene core
triphenylamine dendrimer
synthesis
two-photon absorption
reduction
bromination
charge transfer
