Sequential Logic Operations with a Molecular Keypad Lock with Four Inputs and Dual Fluorescence Outputs

摘要

A novel coumarin-rhodamine conjugate was prepared, and its metal binding properties were studied by UV/Vis and fluorescence spectroscopy. The conjugate serves as a ratio-metric and highly selective fluorescent sensor for Hg~(2+) ions. Its metal-responsive spectral properties were utilized to construct a molecular keypad lock with four inputs and dual fluorescence outputs. The complexity of this molecular logic network can greatly enhance the security level of this device.