Green-Fluorescent Dye with Extremely Small Molecular Size

BMeS-p-A (1) is a novel synthetic dye. Due to its unique and symmetrical molecular design, 1 shows green fluorescence despite its small molecular size (Table1). 1 shows large Stokes shifts up to 140 nm due to a large conformation change in the excited-state.
The absorption and fluorescence properties of 1 are independent of pH, solvents, or concentration (Figure1, 2). 1 additionally shows high photo-stability. The unique and robust qualities of 1 could be expected to be applied to a variety of applications.

Table 1. Optical properties of BMeS-p-A

Figure 1. Absorption and fluorescence spectra of BMeS-p-A in various solvents

Figure 2. Absorption and fluorescence spectra of BMeS-p-A under various pH conditions

This material was produced by collaboration with Prof. Hiroshi Katagiri at Yamagata University.