Component Selection in the Self-Assembly of Palladium(II) Nanocages and Cage-to-Cage Transformations

Samanta, Dipak and Mukherjee, Partha Sarathi (2014) Component Selection in the Self-Assembly of Palladium(II) Nanocages and Cage-to-Cage Transformations. In: CHEMISTRY-A EUROPEAN JOURNAL, 20 (39). pp. 12483-12492.

PDF che-A_eur_jou_20-39_12483_2014.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Dynamic supramolecular systems involving a tetratopic palladium(II) acceptor and three different pyridine-and imidazole-based donors have been used for self-selection by a synergistic effect of morphological information and coordination ability of ligands through specific coordination interactions. Three different cages were first synthesized by two-component self-assembly of individual donor and acceptor. When all four components were allowed to interact in a reaction mixture, only one out of three cages was isolated. The preferential binding affinity towards a particular partner was also established by transforming a non-preferred cage into a preferred cage by interaction with the appropriate ligand. Computational studies further supported the fact that coordination interaction of imidazole moiety to Pd-II is enthalpically more preferred compared to pyridine, which drives the selection process. Analysis of crystal packing of both complexes indicated the presence of strong hydrogen bonds between nitrate and water molecules and also H-bonded 3D networks of water. Both complexes exhibit promising proton conductivity (10(-5) to ca. 10(-3) Scm(-1)) at ambient temperature under a relative humidity of circa 98% with low activation energy.

Item Type:	Journal Article
Publication:	CHEMISTRY-A EUROPEAN JOURNAL
Publisher:	WILEY-V C H VERLAG GMBH
Additional Information:	Copyright for this article belongs to the WILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY.
Keywords:	cage compounds; coordination compounds; hydrogen bonding; palladium; supramolecular chemistry
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	08 Nov 2014 05:29
Last Modified:	08 Nov 2014 05:29
URI:	http://eprints.iisc.ac.in/id/eprint/50201

Actions (login required)

View Item