Biologically inspired discrete metal-mediated self-assemblies are constructed from small building blocks utilizing weak supramolecular interactions. Coordination of cis-protected Pd(II) units with suitable polydentate ligands generate [PdxLxLy]2x+ (L= chelating ligand) type discrete metal organic cages whereas the use of simple Pd(II) result [PdmLn]2m+ type complexes.[1] Construction of binuclear [Pd2L2LB2]4+ and [Pd2LB4]4+ type complexes employing non-chelating bidentate ligand (LB) has been well explored and their functions are studied.[1] Controlled design of ligand backbone can have access to nuclearity, shape and size of the derived cages.[2] The inner space of Pd(II) based trinuclear complexes have potential application in catalysis reaction, drug delivery and concurrent hetero guests binding.[3] Linear and lateral extensions of LB ligand permit the design of non-chelating E shaped and tripodal tridentate ligands (LT). Ligands LB and LT coordinate to Pd(II) units to construct [Pd3L3LB3]6+, [Pd3LB6]6+, [Pd3L3LT2]6+ and [Pd3LT4]6+ type trinuclear architectures.[3-5] The influence of counter anions such as induce-fit transformation on Pd(II) driven complexes is a fascinating area of research.[6] This inspired us to construct bidentate and tridentate ligands and their complexes with Pd(II) ions. We reproduced three regio isomeric non-chelating bidentate ligands [7] and performed the anion variation study on [Pd2LB4]4+ type cages. Complexation study using some tridentate ligands is under progress.
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[1] Debata, N. B.; Tripathy, D.; Chand, D.K. Coord. Chem. Rev. 2012, 256,1831.
[2] Saha, S.; Regeni, I.; Clever, G. H. Coord. Chem. Rev. 2018, 374, 1.
[3] Vasdev, R. A. S.; Preston, D.; Crowley, J. D. Chem. Asian J. 2017, 12, 2513.
[4] Fujita, M.; Nagao, S.; Ogura, K. J. Am. Chem. Soc. 1995, 117, 1649.
[5] Dasary, H.; Jagan, R.; Chand, D.K. Chem. Eur. J. 2015, 21, 1499.
[6] Zhang, T.; Zhou, L. P.; Guo, X. Q.; Sun, Q. F. Nat. Commun. 2017, 8, 15898.
[7] Dasary, H.; Jagan, R.; Chand, D.K. Inorg. Chem. 2018, 57, 12222.