Novel spiropyran derivative based reversible photo-driven colorimetric and fluorescent probes for recognizing Fe3+, Cr3+ and Al3+ metal ions

摘要

A novel spiropyran derivative, 3-(5-methoxy-6'-nitro-3H-spiro Ibenzo [d] thiazole-2,2'-chromen1-3-yl)propane-1-sulfonate (MO-SP) as a chemosensor for metal ions has been synthesized. The prepared MO-SP as a colorimetric and fluorescent sensor is sensitive to common trivalent metal ions (Al3+, Cr3+ and Fe3+). In addition, it can be used as a "naked eye" identification agent of Fe3+, Cr3+ and Al3+. When Fe3+, Cr3+ or Al3+ was added, the color changed from orange to yellow, meanwhile, the absorbance at the maximum absorption wavelength decreased obviously, but it did not change significantly when other metal ions were added. The MO-SP is proved to be sensitive, selective, good linear-relationship and low detection limit for recognition of Fe3+, Cr3+ and Al3+ Moreover, the MO-SP also could be employed as molecular logic function.