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Stepwise Construction of Self-Assembled Heterometallic Cages Showing High Proton Conductivity

Saha, Rupak and Samanta, Dipak and Bhattacharyya, Aninda Jiban and Mukherjee, Partha Sarathi (2017) Stepwise Construction of Self-Assembled Heterometallic Cages Showing High Proton Conductivity. In: CHEMISTRY-A EUROPEAN JOURNAL, 23 (37). pp. 8980-8986.

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Official URL: http://dx.doi.org/10.1002/chem.201701596


Two neutral tripodal metalloligands (CoL and FeL where L=C18H21N10) containing a clathrochelate core were synthesized and characterized in one-step. Reactions of these ligands with three different metal acceptors cis-(tmen)Pd(NO3)(2) (tmen = tetramethylethylenediamine), Zn(NO3)(2) and Mn(ClO4)(2) separately yielded a series of heterometallic coordination cages (1a3a and 1b-3b) in high yields. Depending on the nature of coordination geometry of the acceptors, the resulting assemblies have trigonal- bipyramidal (1a/1b), open-cubic (2a/2b), and closed-cubic structures (3a/3b). The structures of the complexes 1a, 2a, 2b, 3a, and 3b were confirmed by single-crystal X-ray diffraction studies. Analysis of crystal packing of the complexes 3a and 3b revealed the presence of several coordinated and lattice water molecules in the intermolecular channels. Both these complexes (3a and 3b) showed very high water adsorption under humid conditions. In addition, 3a and 3b exhibited promising proton conductivity of 3.31x10(-3) and 1.05x10(-4) S cm(-1) at 70 degrees C under 98 % relative humidity (RH) respectively, with activation energy of 1.000.78 eV.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 21 Jul 2017 09:21
Last Modified: 21 Jul 2017 09:21
URI: http://eprints.iisc.ac.in/id/eprint/57445

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