Two cryptand molecules are connected viap-xyloyl, benzene-1,4-dicarbolyol and 9,10-dimethylene anthracene. Each cryptand is further derivatized with fluorophores such that electronic absorption of one fluorophore overlaps emission of the other. This way, three different systems L1, L2 and L3 have been synthesized to get a better view of the effect on the distance in single- and two-step fluorescence resonance energy transfer (FRET) process. These molecules are probed for FRET in the presence of a metal ion as input. L1 and L2 exhibit poor performance in single step FRET while in the case of L3, a large two-step FRET process is operational with Cu(II) or Hg(II) as input.
两个加密分子通过p-木酰基、苯-1,4-二羟基和9,10-二亚甲基
蒽连接在一起。每个加密分子进一步衍生化,与荧光团相结合,使得一个荧光团的电子吸收与另一个的发射重叠。通过这种方式,合成了三种不同的系统L1、
L2和L3,以更好地观察在单步和双步荧光共振能量转移(FRET)过程中的距离影响。这些分子在
金属离子的存在下被探测以进行FRET。L1和
L2在单步FRET中表现不佳,而在L3的情况下,以Cu(II)或Hg(II)为输入,发生了大规模的双步FRET过程。