Ratiometric and colorimetric near-infrared sensors for multi-channel detection of cyanide ion and their application to measure β-glucosidase

摘要

A near-infrared sensor for cyanide ion (CN?) was developed via internal charge transfer (ICT). This sensor can selectively detect CN? either through dual-ratiometric fluorescence (logarithm of I₄₁₄/I₅₆₄ and I₈₀₃/I₅₆₄) or under various absorption (356 and 440?nm) and emission (414, 564 and 803?nm) channels. Especially, the proposed method can be employed to measure β-glucosidase by detecting CN? traces in commercial amygdalin samples.