作者: Xiaofeng Bao , Qiansheng Cao , Xuemei Nie , Yumei Zhou , Renlong Ye
DOI: 10.1016/J.SNB.2015.07.060
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摘要: Abstract A new rhodamine spirolactam derivative bearing a thiodiacetamide moiety and two B fluorophores (RBTDA) was designed, synthesized structurally characterized to develop chemosensor. The interactions of RBTDA with different metal ions have been studied over UV–vis absorption spectra fluorescent spectra. results indicated that exhibited highly sensitive selective turn-on response for Cr3+ in the presence many other cations methanol-HEPES buffer (3:1, v/v, 0.5 mM, pH 7.25) solution. binding analysis based on mass spectroscopic data Job plot suggested formed 1:1 complex Cr3+. association constant (Ka) stoichiometry estimated be 5.01 × 104 M−1 detection limit by further determined 0.378 μM.