Synthesis of 3-D co(II)-oxonate colorimetric probe for selective detection of isopropanol, Co²⁺, and MnO₄^–

Abstract

A coordination polymer (CP) based on Co(II), {[Co(Ox)(H₂O)₃] · 2H₂O}_n (KA@CP2_ARS), has been synthesized using 1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene (Timb) and potassium oxonate (OxK) at room temperature which was examined by single-crystal X-ray diffraction. KA@CP2_ARS contains a one-dimensional (1-D) helical chain that is extended through hydrogen-bonding interactions to form two-dimensional (2-D) and three-dimensional (3-D) supramolecular networks. KA@CP2_ARS demonstrates highly selective luminescent performance for IPA, Co²⁺, MnO₄^–, and uric acid with detection limits of 0.214, 0.16, 0.076, and 0.65 ppm, respectively, among the screened analytes. KA@CP2_ARS displays strong photocatalytic activities for degrading 88.6% of methyl violet dye under ultraviolet irradiation.

Keywords:

• Coordination polymer
• luminescent sensing
• dye degradation
• hydrogen-bonding

Acknowledgements

Anat Ram Sidar, the writer, expresses gratitude to the National Institute of Technology Raipur and the Departments of Chemistry for their support in providing research facilities, and Dr Kafeel Ahmad Siddiqui would like to express his gratitude to the Director and the National Institute of Technology Raipur for their cooperation with the "Crystal Engineering" project.

Disclosure statement

No potential conflict of interest was reported by the authors.

Scheme 1. The mechanism of photocatalytic degradation of dye with KA@CP2_ARS.