Huang Liuqian, Zhang Jing, Yu Xiaoxiu, Ma Yifan, Huang Tianjiao, Shen Xi, Qiu Huayu, He Xingxing, Yin Shouchun
College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jun 15;145:25-32. doi: 10.1016/j.saa.2015.02.109. Epub 2015 Mar 3.
A novel near-infrared fluorescent chemosensor based on BODIPY (Py-1) has been synthesized and characterized. Py-1 displays high selectivity and sensitivity for sensing Cu(2+) over other metal ions in acetonitrile. Upon addition of Cu(2+) ions, the maximum absorption band of Py-1 in CH3CN displays a red shift from 603 to 608 nm, which results in a visual color change from pink to blue. When Py-1 is excited at 600 nm in the presence of Cu(2+), the fluorescent emission intensity of Py-1 at 617 nm is quenched over 86%. Notably, the complex of Py-1-Cu(2+) can be restored with the introduction of EDTA or S(2-). Consequently, an IMPLICATION logic gate at molecular level operating in fluorescence mode with Cu(2+) and S(2-) as chemical inputs can be constructed. Finally, based on the reversible and reproducible system, a nanoscale sequential memory unit displaying "Writing-Reading-Erasing-Reading" functions can be integrated.
一种基于硼二吡咯（Py-1）的新型近红外荧光化学传感器已被合成并表征。在乙腈中，Py-1对检测Cu(2+) 显示出比其他金属离子更高的选择性和灵敏度。加入Cu(2+) 离子后，Py-1在CH3CN中的最大吸收带从603 nm红移至608 nm，这导致视觉颜色从粉红色变为蓝色。当在有Cu(2+) 存在的情况下，Py-1在600 nm处被激发时，Py-1在617 nm处的荧光发射强度猝灭超过86%。值得注意的是，Py-1-Cu(2+) 配合物可通过引入EDTA或S(2-) 恢复。因此，可以构建一个以Cu(2+) 和S(2-) 作为化学输入、在荧光模式下运行的分子水平的蕴含逻辑门。最后，基于这个可逆且可重复的系统，可以集成一个具有“写入-读取-擦除-读取”功能的纳米级顺序存储单元。
