Bis- and tris-naphthoimidazolium derivatives for the fluorescent recognition of ATP and GTP in 100% aqueous solution
作者:Zhaochao Xu、Na Ri Song、Jong Hun Moon、Jin Yong Lee、Juyoung Yoon
DOI:10.1039/c1ob06344h
日期:——
Naphthoimidazolium groups can form unique ionic hydrogen bonds with anions as imidazolium moieties, and in addition, they are fluorescent, so no further elaborative synthesis is needed to introduce a fluorescent group. In this paper, three naphthoimidazolium derivatives were synthesized and studied for the recognition of nucleotides. Compound 1 composed of a single naphthoimidazolium group and quaternary ammonium group did not show any significant fluorescent changes with various anions and nucleotides, such as ATP, GTP, CTP, TTP, UTP, ADP and AMP. A tripodal compound 3 bearing three naphthoimidazolium groups and three quaternary ammonium groups, respectively, showed large fluorescence enhancements with UTP, CTP and TTP and moderate fluorescence enhancements with ATP and pyrophosphate and a fluorescence quenching effect with GTP. On the other hand, compound 2 bearing two naphthoimidazolium groups and two quaternary ammonium groups displayed a selective fluorescence enhancement with ATP and a selective fluorescence quenching effect with GTP in 100% aqueous solution.
萘咪唑铵基团能够与阴离子形成独特的离子氢键,作为咪唑铵基部分,此外,它们具有荧光特性,因此不需要进一步复杂的合成来引入荧光基团。本文合成了三种萘咪唑铵衍生物,并研究它们对核苷酸的识别。化合物1由单个萘咪唑铵基团和四元铵基团组成,与各种阴离子和核苷酸(如ATP、GTP、CTP、TTP、UTP、ADP及AMP)并未显示出显著的荧光变化。三臂化合物3具有三个萘咪唑铵基团和三个四元铵基团,分别与UTP、CTP和TTP表现出较大的荧光增强,与ATP和焦磷酸盐有适度的荧光增强,而与GTP则显示出荧光猝灭效应。另一方面,化合物2具有两个萘咪唑铵基团和两个四元铵基团,在100%水溶液中对ATP表现出选择性荧光增强,而对GTP则表现出选择性荧光猝灭效应。