A highly selective and sensitive colorimetric chemosensor for Fe(2+) based on fluoran dye.
A highly selective chemosensor based on fluoran dye for Fe(2+), 2'-anilino-3'-methyl-6'-dibuthylamino-N-((2'-(2''-ethylimino) methyl) naphthalen-2-ol) iso-indolin-1-one-fluoran (5), was designed and synthesized. The chemical structures of all the intermediates and the fluoran dye 5 are characterized by (1)H NMR, (13)C NMR, Ms and elemental analysis. Upon addition of Fe(2+), the fluoran dye 5 shows a new peak around 658nm in its absorption spectra, and the color of solution changed from colorless to greenish black. Whereas other ions including Mg(2+), Pb(2+), Ni(2+), Hg(2+), Cd(2+), Fe(3+), Cu(2+), Zn(2+) and Al(3+) and so on induced basically no spectral change, which constituted a Fe(2+) highly sensitive and selective colorimetric chemosensor by "naked eyes".
Wang
Sheng
S
Department of Textile System Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea.
Gwon
Seon-Yeong
SY
Kim
Sung-Hoon
SH
D002863:Chromogenic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods*; D005452:Fluoresceins / Q000138:chemical synthesis / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D012680:Sensitivity and Specificity
D002863:Chromogenic Compounds; D005452:Fluoresceins; C023835:fluoran; D007501:Iron