A 3D porous coordination polymer transformed from a 1D nonporous coordination polymer for selectively sensing of diiodomethane

Highlights: • By adding K⁺ ions, one-dimensional chain structure (1) can be converted into three-dimensional porous structure (BIPT-2). • BIPT-2 possess 1D quadrangular channel with 3-interpenetration dia network. • Owing to the porous of BIPT-2, it shows excellent selectivity and sensitivity to diiodomethane than 1 through a strong fluorescence quenching. - Abstract: By adding K⁺, one-dimensional (1D) chain structure (1) can be converted into three-dimensional (3D) porous structure (BIPT-2). Two coordination polymers were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, Thermogravimetric analyses, IR spectroscopy and fluorescence spectroscopy. Owing to its porosity, BIPT-2 shows excellent selectivity and sensitivity to diiodomethane than 1 through a strong fluorescence quenching.