Journal
LANGMUIR
Volume 23, Issue 25, Pages 12549-12554Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la701512r
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A series of four amphiphilic heteroleptic tris(phthalocyaninato) europium complexes with different lengths of hydrophobic alkoxy substituents on one outer phthalocyanine ligand [Pc(15C5)(4)]Eu[Pc(15C5)(4)]Eu[Pc(OCnH2n+1)(8)] (n = 4, 6, 10,12) (1, 2, 4, and 5) was designed and prepared. Their film forming and organic field effect transistor properties have been systematically studied in comparison with analogous [Pc(15C5)(4)]Eu[Pc(15C5)(4)]Eu[Pc(OC8H17)(8)] (3). Experimental results showed that all these typical amphiphilic sandwich triple-decker molecules have been fabricated into highly ordered films by the Langmuir-Blodgett (LB) technique, which displays carrier mobility in the direction parallel to the aromatic phthalocyanine rings in the range of 0.0032-0.60 cm(2) V-1 s(-1) depending on the length of the hydrophobic alkoxy substituents. This is rationalized on the basis of comparative morphology analysis results of the LB films by the atomic force microscopy technique.
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