Multicolour lanthanide(III) porous 1D coordination polymers: tunable wide spectrum emission and efficient CuII sensing

Sanchita Karmakar; Adrija Ghosh; Komal Prasad; Faruk Ahamed Rahimi; Darsi Rambabu; Ritesh Haldar; Tapas Kumar Maji

doi:10.1039/d1dt01860d

Multicolour lanthanide(III) porous 1D coordination polymers: tunable wide spectrum emission and efficient Cu^II sensing

Dalton Trans. 2021 Sep 28;50(37):13002-13011. doi: 10.1039/d1dt01860d.

Authors

Sanchita Karmakar¹, Adrija Ghosh², Komal Prasad², Faruk Ahamed Rahimi¹, Darsi Rambabu¹, Ritesh Haldar^{2

3}, Tapas Kumar Maji^{1

2}

Affiliations

¹ Molecular Materials Laboratory, Chemistry and Physics of Materials Unit (CPMU), School of Advanced Materials (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Post, Bangalore-560064, India. tmaji@jncasr.ac.in.
² New Chemistry Unit (NCU), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Post, Bangalore-560064, India.
³ Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad 500064, Telengana, India.

PMID: 34581361
DOI: 10.1039/d1dt01860d

Abstract

Five isostructural 1D porous coordination polymers (PCPs) with a general formula of {[M(L)(DMF)(H₂O)]·1.5H₂O}_n [M = Tb^III (1), Eu^III (2), Yb^III (3), Nd^III (4) and Er^III (5)] have been synthesized using a flexible tripodal organic linker (L) and characterized. Tb^III (1) and Eu^III (2) PCPs exhibit metal-based green and red emission, respectively, whereas Yb^III (3), Nd^III (4) and Er^III (5) PCPs show near-infrared (NIR) emission. Doping Eu^III in 1 in a precisely controlled stoichiometric amount leads to different mixed lanthanide PCPs, {[Tb_1-xEu_x(L)(DMF)(H₂O)]·1.5H₂O}_n (1a-1f) that show tunable emission including that of bright white light. The PCPs decorated with Lewis basic -O- binding sites make them potential candidates for the binding and selective sensing of traces of Cu^II ions, and this is illustrated for PCP 2 (limit of detection = 0.69 ± 0.02 ppm). The photoluminescence of 2 can be recovered by the introduction of a chelating ligand ethylenediaminetetraacetic acid (EDTA) without any structural disintegration, indicating the potential of the lanthanide PCPs for future sensing applications.