Crystal structure and self-assembly property of sandwich-type mixed (phthalocyaninato)(porphyrinato) rare earth double-decker complexes

Two sandwich-type mixed (phthalocyaninato)(porphyrinato) rare earth double-decker complexes, M(Pc)(TPP) [H2Pc = phthalocyanine; H2TPP = meso-tetra(phenyl)porphyrin] (M = Eu, Lu) (1, 2) were synthesized and the structure of Lu(Pc)(TPP) was characterized by X-ray single-crystal diffraction method. Crystal data: triclinic, space group P1¯, Z = 2, C77H45Cl3LuN12, Mr = 1419.57, a = 12.573(5), b = 12.911(5), c = 22.935(5) Å, α = 103.793(5)°, β = 101.363(5)°, γ = 93.682(5)°, V = 3521(2) Å3, μ(Mo Kα) = 1.196 mm−1, F(000) = 1426, R = 0.0590, and wR = 0.1639 for 9745 observed reflections with I > 2σ(I). X-ray analysis reveals that the coordination polyhedron adopts a slightly distorted square-antiprismatic structure around the metal center. Both phthalocyanine and porphyrin ligands are saucer-shaped, with the skew angle of the two ligand planes approximately 45°. The self-assembled nano-structures of both complexes 1 and 2 were systematically investigated by electronic absorption and Fourier transform infrared (FT-IR) spectroscopy, transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), and X-ray diffraction (XRD) techniques, revealing the effect of molecular structure on the dimension of self-assembled nano-structures.

Two sandwich-type mixed (phthalocyaninato)(porphyrinato) rare earth double-decker complexes, M(Pc)(TPP) [H2Pc = phthalocyanine; H2TPP = meso-tetra(phenyl)porphyrin] (M = Eu, Lu) (1, 2) were synthesized and the structure of Lu(Pc)(TPP) was characterized by X-ray single-crystal diffraction method. Comparative studies over the self-assembly properties of the europium and lutetium double-deckers clearly reveal the effect of molecular structure on the dimension of self-assembled nano-structures.Figure optionsDownload as PowerPoint slideHighlight
► Two sandwich-type double-deckers, M(Pc)(TPP) (M = Eu, Lu), were synthesized.
► The structure of Lu(Pc)(TPP) was characterized by X-ray crystallography.
► The self-assembly properties of both complexes were comparatively investigated.
► Results reveal the effect of molecular structure on self-assembled nano-structures.