Synthesis, Characterization and OFET Properties of Amphiphilic Mixed (Phthalocyaninato)(porphyrinato)europium(III) Complexes

Amphiphilic mixed (phthalocyaninato)(porphyrinato)europium(III) triple-decker complexes Eu-2[Pc(15C5)(4)](2)[T(C10H21)(4-) P] (1) and Eu-2[Pc(15C5)(4)](2)[TPOPP] (2) [H2PC(15C5)(4) = 2,3,9,10,16,17,23,24-tetrakis (15-crown-5) phthalocyanine; H2T-(C10H21)(4)P = meso-5,10,15,20-tetra-n-decylporphyrin, H2TPOPP = meso-5,10,15,20-tetrakis(4-pentyloxyphenyl)porphyrin] were designed and synthesized by the raise-by-one-story method. These novel sandwich triple-decker complexes were characterized by a wide range of spectroscopic methods, and they were also electrochemically studied. Highly ordered films were fabricated by the Langmuir-Blodgett (LB) technique into organic field-effect transistors (OFETs). The devices display good OFET performance with a carrier mobility in the range 0.03-0.78 cm(2) V-1 s(-1). As expected, the devices show a low threshold voltage range from -1.19 to -4.34 V. The mobility of compound I reaches 0.78 cm(2) V-1 s(-1), which is the highest value so far achieved for LB film-based OFETs, as a result of the narrow energy gap (1.04 eV) of this compound. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)