A one-dimensional manganese(III)–porphyrin coordination polymer: crystal structure and photophysical properties

Abstract

A novel manganese(III)-porphyrin complex, namely, catena-poly[[chloridomanganese(III)]-2 -5,10,15,20-tetrakis(pyridin-3-yl)-21H,23H-porphinato(2À)-5 N 21 ,N 22 ,N 23 ,N 24 :N 5 ], [MnCl(C 40 H 24 N 8 )] n , 1, was prepared by the hydrothermal reaction of manganese chloride with 5,10,15,20-tetrakis(pyridin-3-yl)-21H,23Hporphine. The crystal structure was determined by single-crystal X-ray diffraction. The porphyrin macrocycle exhibits a saddle-like distortion geometry. The Mn III atom has a six-coordination geometry. Each porphyrin unit links to two neighbouring units to yield a one-dimensional coordination polymer. These chains are further interlinked by hydrogen bonds to form a two-dimensional network. The complex shows red photoluminescence emission bands in ethanol solution, which can be attributed to ligand-to-ligand charge transfer (LLCT) accompanied by partial metal-to-ligand charge transfer (MLCT), as revealed by TDDFT calculations.research papers 376 Wen-Tong Chen A 1D manganese(III)-porphyrin polymer

An Imidazole-Copper(I) Metallacycle Complex Exhibiting Thermochromic Fluorescence

“…As an important branch of coordination chemistry, crystal engineering of copper(I) coordination complexes has attracted much attention due to their structural diversity [1][2] and potential applications in photochromism [3][4][5][6][7][8][9], photoluminescence [10][11][12][13][14][15][16][17], nonlinear optics [18], gas adsorption [19][20][21] and catalysis [22][23]. It is well known that structure is correlated with luminescence behavior, so the design of ligand structure play a key role in the resulting assembly with metal ions.…”

Crystallographic and (spectro)electrochemical characterizations of cobalt(II) 10-phenyl-5,15-di-p-tolylporphyrin

“…(CH2Cl2)0.6 the distances between the cobalt(II) atom Co1 and the carbon atoms C2 and C3 are significantly shorter (3.178(7) and 3.074(7) Å, respectively). The close porphyrin stacking is also strengthened by C(from porphyrin 1)•••C(from porphyrin 2) short interactions with d(C68-C20) = 3.274(8) Å and d(C69-C1) = 3.278(7) Å.Interestingly, 1-Co molecules form three pairs of stacked aromatics dimers obtained by inversion symmetry centers along the a-axis with an angle between the two porphyrins included in the asymmetric unit equal to 21.09(4)°[47,48]. Their slipped cofacial orientations resemble the…”