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A Series of Trifacial Pd6 Molecular Barrels with Porphyrin Walls

Bar, Arun Kumar and Mohapatra, Sudip and Zangrando, Ennio and Mukherjee, Partha Sarathi (2012) A Series of Trifacial Pd6 Molecular Barrels with Porphyrin Walls. In: CHEMISTRY-A EUROPEAN JOURNAL, 18 (31). pp. 9571-9579.

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Official URL: http://dx.doi.org/10.1002/chem.201201077

Abstract

Three new nanoscopic trigonal prisms, (tmen)6Pd6(H2L)3](NO3)12 (1), (Meen)6Pd6(H2L)3](NO3)12 (2), and (2,2'-bipy)6Pd6(H2L)3](NO3)12 (3), have been synthesized in excellent yields through single-step metalligand-coordination-driven self-assembly using 5,10,15,20-tetrakis(3-pyridyl)porphyrin (H2L) as a donor and cis-blocked PdII 90 degrees acceptors. These complexes were fully characterized by spectroscopic studies and single-crystal X-ray diffraction. All of these barrels quantitatively bind ZnII ions in the N4 pockets of the porphyrin walls at room temperature. Their corresponding zinc-embedded complexes, (tmen)6Pd6(ZnL)3](NO3)12 (1?a), (Meen)6Pd6(ZnL)3](NO3)12 (2?a), and (2,2'-bipy)6Pd6(ZnL)3](NO3)12 (3?a), were synthesized under ambient conditions by the post-synthetic binding of ZnII ions into the H2N4 pockets of the porphyrin walls of these complexes. These zinc-embedded complexes were characterized by electronic absorption, fluorescence emission, 1H NMR spectroscopy, as well as elemental analysis. Complexes 13 exhibited considerable microporosity in their solid state. Complex 1 was an efficient adsorbent for nitrogen gas and EtOH, MeOH, and water vapors.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to WILEY-V C H VERLAG GMBH
Keywords: cage compounds;metal-ligand coordination;palladium; porphyrins;self-assembly
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 28 Aug 2012 07:13
Last Modified: 28 Aug 2012 07:13
URI: http://eprints.iisc.ernet.in/id/eprint/44978

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