A new intramolecular charge transfer receptor as a selective ratiometric 'off-on' sensor for Zn (2+)

作者：Mashraqui Sabir H^*; Khan Tabrez; Sundaram Subramanian; Betkar Rupesh; Chandiramani Mukesh

来源：Tetrahedron Letters, 2007, 48(48): 8487-8490.

DOI：10.1016/j.tetlet.2007.09.163

• ICT probe
• synthesis
• UV-visible
• fluorescence
• stability constants
• Zn2+ ratiometric probe

A new intramolecular charge transfer (ICT) probe 3 is found to display a highly selective photophysical response in the presence of Zn2+, among various biologically significant metal ions examined. The absorption band of 3 is red shifted by 84 nm and the fluorescence intensity increases 13-fold in the presence of Zn2+. The binding interaction follows the order Zn2+ > Cd2+ > Mg2+ > Ba2+ > Ca2+ > K+ congruent to Na+ congruent to Li+ and the stability constant for 3 + Zn2+ is over an order of magnitude higher compared to biologically competing Ca2+ and Mg2+.

• 出版日期2007-11-26