Lanthanide-based coordination polymers: a fluorometric Frontier in explosive sensing
In the pursuit of public safety, environmental protection, and counter-terrorism, significant advancements have been made in explosive detection techniques. However, challenges such as limited sensitivity, poor selectivity, and high operational costs remain, particularly for trace-level detection. In this study, we present a simple and scalable synthesis of lanthanide-based coordination polymers (Ln-COPs), denoted as Ho(DAB) and Tb(DAB), formed through the coordination of Ho(iii) and Tb(iii) ions, respectively, with the organic linker 3,3?-diaminobenzidine (DAB). Spectroscopic and electron microscopic analyses confirm their two-dimensional planar structure, resulting from the self-assembly of infinitely long polymeric strands. These luminescent Ln-COPs demonstrate exceptional performance as sensors for detecting both nitroaromatic and non-nitroaromatic explosives via fluorescence quenching. Notably, Tb(DAB) exhibits a remarkable limit of detection of 7.7 M for TNP. Furthermore, mechanistic insights into the quenching process are explored. These results underscore the sensitivity and practical applicability of Ln-COPs in advanced explosive detection systems. This journal is The Royal Society of Chemistry, 2025
Anand, Samika; Kumar, Abhishek; Sunajadevi, Kalathiparambil Rajendra Pai; Yelamaggad, Channabasaveshwar V.; Bhattacharyya, Kaustava
RSC Advances;Volume;15;Issue;52;pp.44797-44811
https://doi.org/10.1039/d5ra02731d https://www.scopus.com/pages/publications/105025948810?origin=resultslist
Anand S., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Kumar A., Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Karnataka, Manipal, 576104, India, Centre for Nano and Soft Matter Sciences (CeNS) Arkavathi, Survey No. 7, Shivanapura, Dasanapura Hobli, Karnataka, Bengaluru, 562162, India; Sunajadevi K.R.P., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Yelamaggad C.V., Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Karnataka, Manipal, 576104, India, Centre for Nano and Soft Matter Sciences (CeNS) Arkavathi, Survey No. 7, Shivanapura, Dasanapura Hobli, Karnataka, Bengaluru, 562162, India, SJB Institute of Technology, Health & Education City Kengeri, Karnataka, Bangalore, 560060, India; Bhattacharyya K., Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India, Homi Bhabha National Institute Anushaktinagar, Mumbai, 400094, India