Dual-functional hydrogen-bonded organic frameworks for aniline and ultraviolet sensitive detection

A dual-functional hydrogen-bonded organic frameworks FJU-200 for aniline and ultraviolet sensitive detection. [Display omitted] A novel hydrogen-bonded organic frameworks (HOFs) FJU-200 has been constructed from N,N'-bis(5-isophthalic acid)naphthalimide (H4L). FJU-200 has a good dual-function of aniline and ultraviolet detection. FJU-200 is the first case of HOF with dual sensing of visual color changes and photoluminescence quenching for aniline detection, and the detection limit of aniline can reach 5.5 × 10−4 mol/L. Under ultraviolet FJU-200 will rapidly change from light yellow to rustic brown, which makes it possible to use FJU-200 to achieve minute-level ultraviolet detection. Moreover, for more convenient use, FJU-200 test papers are prepared. Using them, convenient and fast aniline or ultraviolet detection can be realized. The single-crystal X-ray structures show that compared with the original FJU-200, both PhNH2@FJU-200 and UV-FJU-200 have larger pore sizes, and the dihedral angles of the H2L2− in framework has been changed.