Synthesis, Characterization and Fluorescent Properties of Three One‐Dimensional Coordination Polymers Derived from Polypyridyl Ligands 

Abstract

Three one‐dimensional coordination polymers, [MnCl2(4‐pyterpy)]∙2CHCl3 (1), [Mn(NO3)2(4‐pyterpy)]∙CHCl3 (2) and [Ag(NO3)(3‐pyterpy)]∙H2O (3) (4‐pyterpy = 4′‐(4‐pyridyl)‐2,2′:6′,2″‐terpyridine and 3‐pyterpy = 4′‐(3‐pyridyl)‐2,2′:6′,2″‐terpyridine) were synthesized and characterized by X‐ray diffraction. All three compounds exhibit a rare “head‐to‐tail” coordination of the multidentate ligand, but differ significantly in their polymer chain conformations. Additionally, the fluorescent properties of all three compounds were investigated and show a weak, ligand‐centered fluorescence at 416–418 nm.

A Journey from Supramolecular Chemistry to Nanoscale Networks

“…Perhaps the simplest manifestation is in the complex [{Ag(2)} n ][NO 3 ] n in which near planar four-coordinate silver ions are coordinated to one tpy and one pyridine metal-binding domain from each of two 2 ligands. [23] The Ag…Ag distance is 10.462 Å and the angle between the metal-binding domains of 122.7°is close to the expectation value (Fig. 5a).…”

“…Interestingly, the zig-zag arrangement is also observed in [{Mn(NO 3 ) 2 (1) n ] in which one bidentate and one monodentate nitrate ligand generate a facial O 3 donor set whereas [{MnCl 2 (1) n ] is topologically and topographically linear. [23] Another elegant way in which the topographical properties of the coordination polymer can be influenced is through the engineering of the angle subtended between the metal-binding vectors (Fig. 5).…”

Structural Studies, Antimicrobial Activity and Protein Interaction of Photostable Terpyridine Silver(I) Complexes

“…The coordination geometries of Ag(I) ion include linear, trigonal planar, tetrahedral, and trigonal‐bipyramidal , . The coordination chemistry of 2,2′:6′,2′′‐terpyridine (tpy) towards Ag(I) is a subject of interest encouraged by the exciting photophysical properties . Normally, tpy behaves towards metal ions as a planar tridentate ligand, and in rarely examples tpy acts as a bidentate ligand with a free pyridine arm .…”

“…Crystal structure of [Ag 2 (tpy‐4′‐phen) 2 ](SO 3 CF 3 ) 2 (Figure a) was reported; each Ag(I) ion is coordinated by two N‐atoms of a given tpy ligand, and by one N atom from the adjacent molecule . Extension of terpyridine ligand system led to develop of bimetallic complexes and hydrogen‐bonded polymers via the head‐to‐tail interaction . Three one‐dimensional coordination polymer of [Ag(NO 3 )(3‐pytpy)] · H 2 O (3‐pytp = 4′‐(3‐pyridyl)‐2,2′:6′,2′′‐terpyridine), (Figure b), was synthesized by Dehnen .…”

“…Extension of terpyridine ligand system led to develop of bimetallic complexes and hydrogen‐bonded polymers via the head‐to‐tail interaction . Three one‐dimensional coordination polymer of [Ag(NO 3 )(3‐pytpy)] · H 2 O (3‐pytp = 4′‐(3‐pyridyl)‐2,2′:6′,2′′‐terpyridine), (Figure b), was synthesized by Dehnen . [Ag 2 (L PY ‐ k 2 N 1 ,N 2 ) 2 (PF 6 ) 2 ], and [Ag 2 (L PY ‐ k 3 N 1 ,N 2 N 3 ) 2 ] (PF 6 ) 2 (Figure d) were isolated from reaction of L PY with silver hexafluorophosphate.…”