1) Dawid, U.; Pruchnik, F..; Starosta, R.; Dal. Trans.2009, (17), 3348-3353, DOI: 10.1039/b820474h ; Structure and properties of 2,2′-bipyridine-3,3′,6,6′-tetracarboxylic acid and its iron(II) and cobalt(II) complexes
2) Ji, B.; Deng, D.; He, X.; Liu, B.; Miao, S.; Ma, N.; Wang, W.; Ji, L.; Liu, P.; Li, X.; Inorg. Chem. 2012, 51(4), 2170-2177, DOI: 10.1021/ic202063h ; Syntheses, Structures, Luminescence, and Magnetic Properties of One-dimensional Lanthanide Coordination Polymers with a Rigid 2,2′-Bipyridine-3,3′,6,6′-tetracarboxylic Acid Ligand
3) Li, Q.; Ren, C.; Huang, Y.; Li, J.; Liu, P.; Liu, B.; Liu, Y.; Wang, Y.; Chem. -Eur. J. 2015, 21(12), 4703-4711, DOI: 10.1002/chem.201405984 ; Thermally Triggered Solid‐State Single‐Crystal‐to‐Single‐Crystal Structural Transformation Accompanies Property Changes