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SUZUKI Naoya

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My research focuses on stimuli-responsive dyes, which exhibit remarkable changes in their photophysical properties--such as absorption and emission wavelengths--in response to various external stimuli including light, heat, pressure, and pH. In addition to these environmental factors, they also respond to specific chemical species such as metal ions and reactive oxygen species, as well as enzymatic reactions.

Thanks to these unique characteristics, stimuli-responsive dyes have been widely applied in diverse fields, including fluorescent probes for bio-imaging, optoelectronic materials, and drug delivery systems.

In my research, I aim to develop novel dyes with superior performance by employing molecular structures that have not previously been utilized for stimuli-responsive systems. In particular, my recent work focuses on fluorescent carbanions.

Carbanions are generally unstable and therefore have rarely been explored as dye components. However, compared to conventional anionic dyes, carbanions offer the potential for greater π-conjugation extension, making them promising candidates for long-wavelength-emissive dyes.
Currently, I am working on the development of dyes capable of generating stable and strongly luminescent carbanions, with the ultimate goal of applying these systems to bioimaging.

Fig. 1 Comparison of the π-expansion between conventional anionic species and carbanion

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