HIGHLY SELECTIVE RECOGNITION OF GUANOSINE PHOSPHATES ON THE BASIS OF ZN(Ⅱ)-CONTROLLED ON-OFF-ON CHARGE TRANSFER FLUORESCENCE OF 1, 4-BIS (IMIDAZOL-1-YLMETHYL) BENZENE
Recognition of guanosine phosphates is very important in biological processes and has been investigated extensively, but still less involved in the charge transfer emission of dual fluorescent molecules until today. In this work, one imidazolium derivative with dual fluorescence emission, 1, 4-bis (imidazol-1ylmethyl) benzene (bix), was reported to display highly selective recognition of guanosine phosphates based on the on-off-on variation of its charge transfer emission, which was suppressed by Zn( Ⅱ ) ion and then resumed by guanosine phosphates. Due to the on-off-on variation of charge transfer emission of bix molecules, the mechanism for ratiometric fluorescent recognition of guanosine phosphates could be established. Through this system, the effectively discrimination of guanosine phosphates from other structurally similar anions, such as ATP and PPi, could be well established, which even had a unique response to the DNA sequences containing guanine base.
guanosine phosphates charge transfer zinc ion ratiometric fluorescence
Liang Lijiao Li Yuanfang Huang Chengzhi
Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and C Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and C Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and C
国际会议
重庆
英文
447-449
2011-10-28（万方平台首次上网日期，不代表论文的发表时间）