Bis[Tetrakis(Trans-2-methoxy-4-(2-nitrovinil)phenoxy)-phtha-
locyaninato]lutetium(III) (4). A mixture of (0.73 g,
computer. The results obtained under these conditions were
reproducible with an uncertainty less than 3%.
3
2.28 mmol) anhydrous lutetium(III) acetate (0.1 g, 0.29 mmol)
and 0.175 mL DBU (1.14 mmol) in 8 mL 1-hexanol was heated
and stirred at 170 °C for 24 h under argon. After cooling to
room temperature, the crude product was precipitated by hexane
(100 mL). The dark green product was washed with hot methyl-
acetate, ethylacetate, methanol. This compound was soluble in
hot DMSO, DMF and partially soluble in THF. Yields; 0,7642 g
(12%). Mp > 350 °C. Anal. calc. for (C136H88N24O32Lu): C%
59,47, H% 3,21, N% 12,24. Found: C% 59,69, H% 3,56, N%
12,78. MS (MALDI-TOF) m/z: 2747–2750 range. UV/Vis
(DMSO), λmax nm−1 (log ε, dm3 mol−1 cm−1): 682 (2,58), 614
(2,30), 360 (3,51). IR (KBr): υ (cm−1) 2930–2846 (aliphatic
–CH), 1597 (aromatic-CvC), 1503 and 1351 (–NO2), 751
(subs. Benzene).
Conclusions
In this work, metal-insulator-metal structures have been fabri-
cated incorporating spin coated Pcs thin film as the insulating
layer. Impedance measurements have been carried out on this
structure in the temperature range of 300– 500 K and frequency
range of 40 Hz to 1 × 105 Hz The Au/2/Au structure exhibited
giant dielectric characteristics as well as low dielectric loss.
Thus, our results show that compound 2 can be a viable alterna-
tive to conventional SiO2 as gate insulator which has a dielectric
constant 3.9, in metal oxide semiconductor based devices. The
frequency and temperature dependence of the ac conductivity
has been analyzed in terms of QMT and CBH models. The
temperature dependence of the exponent s, seems to support the
CBH model.
MALDI sample preparation
3-Indole acrylic acid (IAA) (20 mg mL−1 in acetonitrile) for 2
and dithranol (1,8-dihydroxy-10H-anthracen-9-one) (20 mg
mL−1 in tetrahydrofurane) matrix for 3 and 4 were prepared. The
MALDI sample was prepared by mixing complex (2 mg mL−1
in tetrahydrofuran for 2 and 2 mg mL−1 in dimethylformamide
for 3 and 4) with the matrix solution (1 : 10 v/v) in a 0.5 mL
Eppendorf® micro tube. Finally 1 μL of this mixture was depos-
ited on the sample plate, dried at room temperature and then
analyzed.
Acknowledgements
This work was supported by the Research Fund of Fırat univer-
sity (Project No. FÜBAP-1297) and in part by Turkish Academy
of Sciences (TUBA).
Notes and references
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