title: Complete Transmetalation in a Metal-Organic Framework by Metal Ion Metathesis in a Single Crystal for Selective Sensing of Phosphate Ions in Aqueous Media.
abstract: A complete transmetalation has been achieved on a barium metal-organic framework (MOF), leading to the isolation of a new Tb-MOF in a single-crystal (SC) to single-crystal (SC) fashion. It leads to the transformation of an anionic framework with cations in the pore to one that is neutral. The mechanistic studies proposed a core-shell metal exchange through dissociation of metal-ligand bonds. This Tb-MOF exhibits enhanced photoluminescence and acts as a selective sensor for phosphate anion in aqueous medium. Thus, this work not only provides a method to functionalize a MOF that can have potential application in sensing but also elucidates the formation mechanism of the resulting MOF.
authors: School of Chemistry, Indian Institute Science Education and Research, Thiruvananthapuram, India.
authors: K S
authors: KS
authors: Asha
authors: Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-, 700032, India.
authors: Rameswar
authors: R
authors: Bhattacharjee
authors: School of Chemistry, Indian Institute Science Education and Research, Thiruvananthapuram, India. sukhendu@iisertvm.ac.in.
authors: Sukhendu
authors: S
authors: Mandal
keywords: SC to SC transformation; metal-organic frameworks; metathesis; phosphate; selective sensing