A highly selective fluorescent sensor for the detection of Al³⁺ and CN⁻ in aqueous solution: biological applications and DFT calculations

Abstract

A new turn-on fluorescent chemosensor 1 was developed to detect both Al3+ and CN− and used for practical and biological applications.

A Simple and Highly Sensitive Turn-on Schiff Base Type Naked-eye Fluorescent Sensor for Aluminum Ion in Living Cells

“…The value of the binding constant was calculated as 3.9 • 10 3 M -1 which was within the range of those (10 3 -10 9 M -1 ) previously reported Al 3+ sensors. 41 In addition, the linear plot also proved the 1:1 complexation behavior of SK-1 to Al 3+ . Because, if a 1:1 metal-probe complex is formed between receptor and metal ions, Benesi-Hildebrand plot should be linear.…”

An Indole-Based Fluorescent Chemosensor for Detecting Zn2+ in Aqueous Media and Zebrafish

“…The pH dependence of IH-Sal -Zn 2+ for biological application was tested with various pH values (6–9, Figure S8 ). While there was no fluorescence emission at pH 6, IH-Sal -Zn 2+ showed a remarkable fluorescence response between pH 7 and 9, indicating that IH-Sal can clearly recognize Zn 2+ by the fluorescence application within the environmental pH range [ 68 ]. Based on the result of the pH dependence, fluorescence imaging of zebrafish was performed to widen the biological application.…”

Subtle structural variation in azine/imine derivatives controls Zn2+sensitivity: ESIPT-CHEF combination for nano-molar detection of Zn2+with DFT support

“…A hypsochromic shi to 477 nm is observed with a signicant increase of f b (0.0237) for Ad1 (S 0 / S 1 transition, HOMO / LUMO, HOMO / LUMO + 1), suggesting formation of rigid Ad1. 49 Another HOMO / LUMO transition along with HOMO / LUMO + 1 have been observed for S 0 / S 2 with f b ¼ 0.0095. The HOMO-LUMO energy gap in L2 is 0.11953 eV while it is 0.110807 eV in Ad2 (Fig.…”