Unique 2D metalloporphyrin networks constructed from iron(II) and meso-tetra(4-pyridyl)porphyrin

A one-pot solvothermal reaction of iron(II) with mesotetra(4-pyridyl) porphyrin (TPyP) leads to two novel layered structures with an unprecedented two-dimensional paddle-wheel-like pattern; the two structures have the same composition Fe(TPyP) but a different packing sequence, namely ...ABAB... and ...ABCDABCD....