Figure 2.

Absorption (5 μM), excitation and emission spectra (1 μM) of (A) 7, λem: 560 nm, λex: 405 nm; B) 1, λem: 620 nm, λex: 405 nm; C) 2, λem: 690 nm, λex: 405 nm and their BCN conjugates in PBS‐SDS; fluorescence spectra were normalized for each BCN conjugates.