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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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
Publication:	CHEMISTRY-A EUROPEAN JOURNAL
Publisher:	WILEY-V C H VERLAG GMBH
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.ac.in/id/eprint/44978

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