Detection and visualization of heavy metal ions are among the most crucial topics in chemical and environmental science becauseof the importance of these metals in many industrial processes and living systems. In particular, detection of mercury and related species is a critical problem from both the industrial and ecological viewpoints due to their high impact on the environment [1,2]. Thedesign of a variety of elaborate sensor molecules based on fluo-rescein, rhodamine, and other functional dyes has been activelypursued toward this end