Issue 7, 2006

Self-assembly of N,N′,N″-tris(4-pyridyl)trimesic amide and N,N′,N″-tris(3-pyridyl)trimesic amide with AgI or CdII ions

Abstract

We report herein an interesting family of tripyridyltriamides (L1N,N′,N″-tris(3-pyridyl)trimesic amide, L2N,N′,N″-tris(4-pyridyl)trimesic amide) used as tridentate bridging ligands to carry out crystal-engineering studies. The reaction of AgPF6 with L1 leads to a 2-D coordination polymer, [Ag(L1)PF6]n (1). The 48-membered macrocycles constructed from three-coordinate AgI ions as connectors and three tripyridyltriamide moieties propagate into 2-D extended structures. Indeed, the AgI⋯π interaction (the distance of the AgI⋯centroid of benzene is 3.209 Å) increases the supramolecular complexity, and leads to inter-sheet dimerization. The reaction of CdCl2 with L2 forms a 3-D coordination network, [Cd(L2)2Cl2]n (2). The open channels with a diameter of ca. 7.5 Å containing the tripyridyltriamide moieties propagate into 3-D extended structures. This is an interesting example of 3-D coordination networks containing tripyridyltriamides as functional moieties inside the channels. However, the channels are filled with disordered water molecules and chloride anions, where the latter are appended through hydrogen-bonding interactions with the amide moieties inside the channels. In addition, 1 displays a high-energy emission with a maximum at ca. 450 nm, whereas 2 shows a low-energy emission with a maximum at ca. 532 nm. The former with a ca. 450 nm emission is assigned to an intraligand transition, and the latter with a ca. 532 nm emission is tentatively ascribed to a metal-to-ligand charge-transfer transition.

Graphical abstract: Self-assembly of N,N′,N″-tris(4-pyridyl)trimesic amide and N,N′,N″-tris(3-pyridyl)trimesic amide with AgI or CdII ions

Supplementary files

Article information

Article type
Paper
Submitted
27 Mar 2006
Accepted
16 May 2006
First published
05 Jun 2006

New J. Chem., 2006,30, 1087-1092

Self-assembly of N,N′,N″-tris(4-pyridyl)trimesic amide and N,N′,N″-tris(3-pyridyl)trimesic amide with AgI or CdII ions

B. Tzeng, B. Chen, H. Yeh, G. Lee and S. Peng, New J. Chem., 2006, 30, 1087 DOI: 10.1039/B604446H

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