Georg Pawlowski

Synthesis and properties of a new kind of one-dimensional conductor VIII. Synthesis and characterization of trans-bis-1-alkynyl substituted silicon, germanium, tin phthalocyanines and germanium hemiporphyrazines

Abstract The preparation of several new trans -bis-1-alkynyl(phthalocyaninato)silicon (VIc—f), -germanium (VIIc—f) and -tin (VIIId, f) compounds as well as trans -bis-1-alkynyl(hemiporphyrazinato)germanium (XIc, e, f) derivatives is described. The products were obtained in high yields by treating the corresponding dichlorides (I, II, IV, X; X = (Cl) with 1-alkynyl Grignard reagents (Vc—f) in tetrahydrofuran (THF) and were characterized spectroscopically. The compounds obtained are considered as models for a new kind of one-dimensional conductor.

A Convenient Synthesis of Trifluoromethyl Substituted Phthalocyanines

Abstract Our studies on solubility effects of peripheric substituents in phthalocyanines2, especially with respect to the electrical conductivity of a new kind of one-dimensional conductors proposed by us3, led to the preparation of some new tetra- and octa-trifluoromethyl substituted phthalocyanines 1a,b - 3a,b.

Third-order nonlinear optical properties of trans-dihydroxy-1,6,11,16-tetra(tert.butyl)porphyrazine germanium thin films

Third-order nonlinear optical susceptibilities χ(3) of trans-dihydroxy-1,6,11,16-tetra-(tert.butyl) porphyrazine germanium [t-Bu4PazGe(OH)2] thin films measured by the third-harmonic generation technique are reported for the first time. The χ(3)(−3ω;ω,ω,ω) value as high as 1.3×10−11 esu was observed from a dominant three-photon resonance. The χ(3) values of porphyrazine germanium derivative are analogous to metallophthalocyanines and these results imply that axial substitution is beneficial for enhancing third-order optical nonlinearity.

Lösliche Phthalocyaninatometalloxane, Dotierung und Leitfähigkeit / Soluble Phthalocyaninatometaloxanes, Doping and Conductivity

Abstract The polymeric μ-oxo-(tetraalkylphthalocyaninato)-metal IV B derivatives 1 a-d were synthesized by thermal condensation of the monomeric dihydroxo(tetraalkylphthalo-cyaninato)-metal IV B compounds 5 a-d. The high solubility of the metaloxanes 1 a-d enables a homogeneous reaction with the dopant. The electrical conductivities of the undoped and doped compounds are reported.