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

Saha, Rupak ; Samanta, Dipak ; Bhattacharyya, Aninda Jiban ; Mukherjee, Partha Sarathi (2017) Stepwise Construction of Self-Assembled Heterometallic Cages Showing High Proton Conductivity Chemistry - A European Journal, 23 (37). pp. 8980-8986. ISSN 0947-6539

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

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

Abstract

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 (1 a–3 a and 1 b‐3 b) in high yields. Depending on the nature of coordination geometry of the acceptors, the resulting assemblies have trigonal‐ bipyramidal (1 a/1 b), open‐cubic (2 a/2 b), and closed‐cubic structures (3 a/3 b). The structures of the complexes 1 a, 2 a, 2 b, 3 a, and 3 b were confirmed by single‐crystal X‐ray diffraction studies. Analysis of crystal packing of the complexes 3 a and 3 b revealed the presence of several coordinated and lattice water molecules in the intermolecular channels. Both these complexes (3 a and 3 b) showed very high water adsorption under humid conditions. In addition, 3 a and 3 b exhibited promising proton conductivity of 3.31×10−3 and 1.05×10−4 S cm−1 at 70 °C under 98 % relative humidity (RH) respectively, with activation energy of 1.00–0.78 eV.

Item Type:Article
Source:Copyright of this article belongs to John Wiley & Sons, Inc.
Keywords:Cage Compounds; Clathrochelate; Heterometallic; Self-assembly; Supramolecular Chemistry.
ID Code:116770
Deposited On:20 May 2021 05:47
Last Modified:20 May 2021 05:47

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