Abstract
A carbazole-based bis-dithiane ( 1) was rationally constructed in a straightforward manner for the selective and ratiometric fluorescent detection of Cd 2+ with the concept of aldehyde group protection/deprotection. The probe showed a ratiometric fluorescent response to Cd 2+ with a large emission wavelength shift (>50 nm) and displayed high selectivity for Cd 2+ over other metal ions due to distinct deprotection conditions. In addition, a Cd 2+-promoted dethioacetalization mechanism was proposed.
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