A Novel Styryldehydropyridocolinium Homodimer: Synthesis and Fluorescence Properties Upon Interaction with DNA
作者:Huirong Yao、Lifang Chang、Chang Liu、Xiaojie Jiao、Song He、Haijun Liu、Xianshun Zeng
DOI:10.1007/s10895-015-1650-x
日期:2015.11
A novel homodimer of the styryldehydropyridocolinium dye (TPTP) has been synthesized and characterized. Free TPTP exhibited low fluorescence quantum yield and large Stokes shift (over 160 nm) in water. However, it showed a significant fluorescence turn-on effect upon intercalation into DNA base pairs. Meanwhile, the fluorescence intensity of the intercalated structures formed by TPTP and DNA decreased quickly upon addition of deoxyribonuclease I, indicating that the dye can be used to monitor deoxyribonuclease I activity and DNA hydrolysis. Electrophoresis analysis revealed that the dye had intercalative binding to DNA and can potentially be used for DNA staining in electrophoresis. Thus, the innate nature of large Stokes shift and excellent fluorescence turn on effect upon interaction with DNA endue the dye with a wide range of applications.
我们合成了一种新型的苯乙烯二氢吡啶鎓染料(TPTP)同源二聚体,并对其进行了表征。游离 TPTP 在水中表现出较低的荧光量子产率和较大的斯托克斯偏移(超过 160 nm)。然而,当它插入 DNA 碱基对时,却显示出明显的荧光开启效应。同时,加入脱氧核糖核酸酶 I 后,TPTP 与 DNA 形成的插层结构的荧光强度迅速下降,这表明该染料可用于监测脱氧核糖核酸酶 I 的活性和 DNA 的水解。电泳分析显示,该染料与 DNA 有插层结合,可用于电泳中的 DNA 染色。因此,该染料与 DNA 相互作用时具有较大的斯托克斯偏移和优异的荧光开启效应,因而具有广泛的应用前景。