A new polymorph of terpyridine: variable temperature X-ray diffraction studies and solid state photophysical properties

Varying the frameworks of coordination polymers with (CuI)4 cubane cluster by altering terminal groups of thioether ligands

“…Many efforts have been devoted to the rational design of specific complexes including 1D chains and ladders, 2D grids, 3D microporous networks, interpenetrated nets, and chiral frameworks [4][5][6]. In fact, the formation of these complexes is influenced by many factors such as coordination environment of metal center (or clusters as secondary building units), the choice of rigid or flexible ligand, solvent, template, counterion [7][8][9]. In this context, complex construction between copper(I) halides and sulfur containing organic compounds has great current interest for their potential use in the rational design and synthesis of new polymeric metal-organic coordination architectures [10,11].…”

A new polymorph of 4′-tolyl-2,2′:6′,2′′-terpyridine (ttpy) and the single crystal structures of [Fe(ttpy)2][PF6]2 and [Ru(ttpy)2][PF6]2

“…2,2 0 :6 0 ,2 00 -Terpyridine itself crystallizes in both orthorhombic and monoclinic forms [26,27], 1387-7003/$ -see front matter Ó…”

“…2,2 0 :6 0 ,2 00 -Terpyridine itself crystallizes in both orthorhombic and monoclinic forms [26,27] and it is concluded that p-p stacking and CÀHÁÁÁp interactions are dominant in the molecular packing in both polymorphs [27]. A search of the Cambridge Structural Database [28] revealed the only other example to be our recently reported 4 0 -(hex-5-ynyloxy)-2,2 0 :6 0 ,2 00 -terpyridine, in which the packing motif in both polymorphs is a dimer involving N py ÁÁÁHC alkyne interactions [29].…”

Experimental Evidence of Reversible Crystalline State Transformation of 2,2':6',2"-Terpyridine: Visualization and Seed Effect

“…Resulting crystals were picked up and were washed several times. Structures of the crystals were confirmed as orthorhombic form by comparing the measured powder XRD pattern with a theoretical XRD pattern calculated using a crystal structure data [2] [3]. Melting point of the orthorhombic crystals was reported as 359 -361 K [1].…”

“…Mutai et al, reported two crystal structures of 2,2':6',2"-terpyridine (Figure 1, expressed as terpy hereafter) [1]. In Figure 2, two crystal structures of terpy are shown using reported crystallographic data [2] [3]. A remarkable difference between the two crystal structures is their molecular packing motif.…”