Fig. 1. (A) Absorption spectra of (E)-1/(Z)-1, (E)-2/(Z)-2, and (E)-3/(Z)-3 (λ max = 378 nm, 424 nm, and 410 nm, respectively). (B) Emission spectra of (E)-1/(Z)-1, (E)-2/(Z)-2, and (E)-3/(Z)-3 (λ max = 435 nm, 518 nm, and 536 nm, respectively). Spectra of (E)-1/(Z)-1 were recorded in chloroform, while spectra of (E)-2/(Z)-2, and (E)-3/(Z)-3 were recorded in water.
