Dependence of the intramolecular charge transfer on molecular structure in triazole bridge-linked optical materials
Dependence of the intramolecular charge transfer on molecular structure in triazole bridge-linked optical materials
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DOI：
10.1016/j.dyepig.2012.12.002
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发表时间：
2013-04
影响因子：
4.5
通讯作者：
Y. Zhu;Shanyi Guang;Xinyan Su;Hongyao Xu;Dongyu Xu
中科院分区：
文献类型：
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作者：
Y. Zhu;Shanyi Guang;Xinyan Su;Hongyao Xu;Dongyu Xu
以Huisgen 1,3-偶极环加成反应为基础，采用点击化学方法，设计并合成了4个具有不同端推/拉取代基的新型三唑桥联芴衍生物，收率高。分别用FTIR、1H NMR、13C NMR、MS和元素分析对其结构进行了表征和评价。结果表明，这些三唑桥联芴光学材料几乎可以通过点击化学定量制备。利用分子发射光谱和吸收光谱研究了三唑桥联芴光学材料的分子内电荷转移（ICT），并通过循环伏安法（CV）技术和理论模拟计算进一步证实。研究发现，分子结构对分子内电荷转移有显著影响。通过改变三唑桥接共轭物的末端基团，实现了ICT发射、ICT/局部激发（LE）混合物发射和LE发射。
Four novel triazole bridge-linked fluorene derivatives with different terminal push/pull substituted groups were designed and controlledly synthesized via click chemistry based on Huisgen 1,3-dipolar cycloaddition reaction in high yields. Their structures were characterized and evaluated by FTIR,1H NMR,13C NMR, MS and elemental analyses, respectively. The results show that these triazole bridge-linked fluorene optical materials are almost prepared quantificationally by click chemistry. The intramolecular charge transfer (ICT) in these triazole bridge-linked fluorene optical materials was investigated by molecular emission and absorption spectra, and further confirmed by cyclic voltammetry (CV) technology and theoretical simulation calculation. It is found that the intramolecular charge transfer is significantly affected by molecular structure. ICT emission, ICT/locally excited (LE) mixture emission and LE emission were achieved by changing the terminal group in triazole bridged conjugates.