Anion Sensing with a Blue Fluorescent Triarylboron-Functionalized Bisbenzimidazole and Its Bisbenzimidazolium Salt.

ABSTRACT: A blue fluorescent p-dimesitylboryl-phenyl-functionalized 1,3-bisbenzimidazolyl benzene molecule (1) has been synthesized in high yield by Stille coupling of bisbenzimidazolyl bromobenzene with p-BMes₂-SnBu₃-benzene. Methylation of 1 led to the formation of the bisbenzimidazolium salt (2). The utility of both 1 and 2 in sensing CN^- and halide (F^-, Cl^-, Br^-, and I^-) was examined, and it was found that only the small fluoride and cyanide anions were able to bind to the boron atom with binding constants in the range of 2.9 × 10⁴ to 5 × 10⁵ M^-1. Computational studies provided insight into the photophysical properties of the molecules and

SUBMITTER: Brazeau AL 

PROVIDER: S-EPMC6645667 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature