Organic linkers play a crucial role in constructing lanthanide (Ln) coordination polymers (CPs), influencing structural topologies and physicochemical properties. Herein, we introduce 6-oxo-1,6-dihydro-2,5-pyridinedicarboxylic acid (2,5-H3PODC) as a new ligand for constructing lanthanide coordination polymers that integrates the structural features of terephthalic acid with the chelation capabilities of pyridinone-based functional groups. Six lanthanide-based coordination polymers were synthesized with 2,5-H3PODC, forming two types of CPs – type 1: [Ln(HPODC)(Ox)0.5(H2O)2] (where (Ox) = oxalic acid and Ln = Pr3+ (1), Nd3+ (2)) and type 2: [Ln(H2PODC)(HPODC)(H2O)] (Ln = Eu3+ (3), Gd3+ (4), Dy3+ (5), Er3+ (6)). All compounds were structurally characterized by single-crystal and powder X-ray diffraction, and both compound types are 2D ladder-like networks with cem topologies where the trivalent metal centers are bridged via HPODC2− and Ox2− ligands in type 1 structures and H2PODC− and HPODC2− linkers in type 2 structures. Thermogravimetric analysis (TGA) demonstrated that the metal–organic networks of type 1 and type 2 compounds exhibit distinct decomposition patterns, and the photoluminescent properties of 3 were also examined, revealing efficient ligand based sensitization and characteristic emission bands for Eu(III).
Katuwana Arachchige, Ashanthi K., et al. "Combining coordination and chelation moieties to engineer a new linker for lanthanide coordination chemistry." Dalton Transactions, vol. 55, no. 2, Dec. 2025. https://doi.org/10.1039/D5DT02620B
Katuwana Arachchige, Ashanthi K., Lottes, Brett, Unruh, Daniel K., Greer, Samuel Michael, Stein, Benjamin W., & Carter, Korey P. (2025). Combining coordination and chelation moieties to engineer a new linker for lanthanide coordination chemistry. Dalton Transactions, 55(2). https://doi.org/10.1039/D5DT02620B
Katuwana Arachchige, Ashanthi K., Lottes, Brett, Unruh, Daniel K., et al., "Combining coordination and chelation moieties to engineer a new linker for lanthanide coordination chemistry," Dalton Transactions 55, no. 2 (2025), https://doi.org/10.1039/D5DT02620B
@article{osti_3021579,
author = {Katuwana Arachchige, Ashanthi K. and Lottes, Brett and Unruh, Daniel K. and Greer, Samuel Michael and Stein, Benjamin W. and Carter, Korey P.},
title = {Combining coordination and chelation moieties to engineer a new linker for lanthanide coordination chemistry},
annote = {Organic linkers play a crucial role in constructing lanthanide (Ln) coordination polymers (CPs), influencing structural topologies and physicochemical properties. Herein, we introduce 6-oxo-1,6-dihydro-2,5-pyridinedicarboxylic acid (2,5-H3PODC) as a new ligand for constructing lanthanide coordination polymers that integrates the structural features of terephthalic acid with the chelation capabilities of pyridinone-based functional groups. Six lanthanide-based coordination polymers were synthesized with 2,5-H3PODC, forming two types of CPs – type 1: [Ln(HPODC)(Ox)0.5(H2O)2] (where (Ox) = oxalic acid and Ln = Pr3+ (1), Nd3+ (2)) and type 2: [Ln(H2PODC)(HPODC)(H2O)] (Ln = Eu3+ (3), Gd3+ (4), Dy3+ (5), Er3+ (6)). All compounds were structurally characterized by single-crystal and powder X-ray diffraction, and both compound types are 2D ladder-like networks with cem topologies where the trivalent metal centers are bridged via HPODC2− and Ox2− ligands in type 1 structures and H2PODC− and HPODC2− linkers in type 2 structures. Thermogravimetric analysis (TGA) demonstrated that the metal–organic networks of type 1 and type 2 compounds exhibit distinct decomposition patterns, and the photoluminescent properties of 3 were also examined, revealing efficient ligand based sensitization and characteristic emission bands for Eu(III).},
doi = {10.1039/D5DT02620B},
url = {https://www.osti.gov/biblio/3021579},
journal = {Dalton Transactions},
issn = {ISSN 1477-9234},
number = {2},
volume = {55},
place = {United States},
publisher = {Royal Society of Chemistry},
year = {2025},
month = {12}}
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Office of Workforce Development for Teachers & Scientists (WDTS); USNRC