The reaction of a double-decker phthalocyanine (Pc) complex, bis(phthalocyaninato)lutetium ([LuPc2](-)), with cadmium acetate at 400 degrees C for 30 min under argon provided the first example of a discrete quadruple-decker Pc complex, 1. The structure of 1 was unambiguously determined through the use of high-resolution mass spectrometry, elemental analysis, and NMR techniques such as (1)H-(1)H COSY, (13)C-(1)H COSY, and NOE experiments. The absorption and magnetic circular dichroism spectra of 1 resembled those of [LuPc(2)](-) and [Lu(2)Pc(3)] rather than those of the neutral double-decker species [LuPc(2)](0), since the formal charge on each Pc moiety is 2-. Electrochemical measurements exhibited a stacking effect based on the delocalization of the holes or electrons introduced by oxidation or reduction, respectively, over the entire complex.
An analysis of paramagnetic shifts in proton NMR spectra of non-radical lanthanide(III)-phthalocyanine sandwich complexes
作者:Hideo Konami、Masahiro Hatano、Akio Tajiri
DOI:10.1016/0009-2614(89)87576-1
日期:1989.8
Proton NMRspectra of [NBu4] [Ln(III)Pc2] ([NBu4] = tetra (n-butyl)ammonium; Ln = Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Er, Yb and Lu; Pc = phthalocyanine) are reported. Analysis of NMR and UV-visible spectra suggests a highly symmetrical structure for [LnPc2]− in solution. Contact shifts and pseudo-contact shifts were separated from the observed paramagnetic shifts by a statistical analysis and the
Haghighi, M. Safarpour; Homborg, H., Zeitschrift fur Anorganische und Allgemeine Chemie
作者:Haghighi, M. Safarpour、Homborg, H.
DOI:——
日期:——
Relationship between the Skew Angle and Interplanar Distance in Four Bis(phthalocyaninato)lanthanide(III) Tetrabutylammonium Salts ([NBu<i><sup>n</sup></i><sub>4</sub>][Ln<sup>III</sup>Pc<sub>2</sub>]; Ln = Nd, Gd, Ho, Lu)
Four crystal structures of the title complexes have been analyzed by X-ray crystallography. 1: C80H68N17Nd, a = 17.0545(6) Angstrom, c = 22.807(3) Angstrom, tetragonal, P4/ncc, Z = 4. 2: C80H68N17Gd, a = 17.399(8) Angstrom, c = 11.377(6) Angstrom, tetragonal, P42(1)2, Z = 2. 3: C80H70N17OHo, a = 18.096(5) Angstrom, c = 11.079(6) Angstrom, tetragonal, P42(1)2, Z = 4. 4: C80H70N17OLu, a = 18.171(3) Angstrom, c = 10.987(4) Angstrom, tetragonal, P4/nmm, Z = 2. The [Ln(III)Pc(2)](-) and [NBu(4)(n)](+) ions in each crystal stack alternately in a column along the 4-fold axis. The Ln(III) cation of each [Ln(III)Pc(2)](-) is eight-coordinated by two phthalocyanato dianions (Pc). The interplanar distances between the two Pc rings have a linear relationship to the ionic radii of the central Ln(III) cations. The skew angles between the two Pc rings are 6.2, 34.4, 43.2, and 45.0 degrees for the Nd, Gd, Ho, and Lu complexes, respectively. The skew angle seems to depend on the strength of the pi-pi interaction between the two Pc rings.