ANISOTROPY OF THE MAGNETIC SUSCEPTIBILITY
1453
Table 3. Values of molecular anisotropy of magnetic susceptibility of lanthanide complexes (Δχ ×
106, cm3/mol)
Complex
Ln(CPDk3–5)3bpy17 Ln(dpm)3(pic)2 [22]
Ln(antip)6I3 [23] LnL3CHF2(CF2)5CH2 [24]
Eu(CPDk3–5)3bpy17
Tb(CPDk3–5)3bpy17
Dy(CPDk3–5)3bpy17
Ho(CPDk3–5)3bpy17
Er(CPDk3–5)3bpy17
Tm(CPDk3–5)3bpy17
–3981
–13923
–16253
–5311
9894
–
–15838
–24606
–
–915
–26810
–12002
–7353
6540
–700
–8220
–19470
–12840
5980
3655
6154
1831
12803
–
8. M. Bose, K. Ohta, Y. Babu, and M. D. Sastry, Chem.
complexes is larger by two orders of magnitude, which
should allow us to orient a layer of lanthanide mesogen
according to weak external magnetic fields.
Phys. Lett. 324, 330 (2000).
9. K. Binnemans and C. GorllerꢀWalrand, Chem. Rev.
102, 2303 (2002).
10. Yu. G. Galyametdinov, A. A. Knyazev, V. I. Dzhabarov,
CONCLUSIONS
et al., Adv. Mater. 20, 252 (2008).
It was shown that lanthanide complexes
Ln(CPDk3–5)3bpy17 in CCl4 solution do not form
associates; this is proved by the linear dependence of
magnetic birefringence on the square of field intensity.
The molecular anisotropy of the magnetic susceptibilꢀ
ity of liquid crystalline lanthanide adducts with a nonꢀ
viscous nematic mesophase was determined for the
first time. The obtained values were two orders of magꢀ
nitude larger than those of organic liquid crystals.
11. K. Binnemans, R. Van Deun, D. W. Bruce, et al.,
Mater. Sci. Eng. C 18, 247 (2001).
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and Breach, Amsterdam, 1998).
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ACKNOWLEDGMENTS
16. S. G. Vul’fson, Molecular Magnetochemistry (Nauka,
This work was supported by the Russian Foundaꢀ
tion for Basic Research, project no. 08ꢀ03ꢀ00900ꢀa;
and by the joint Basic Research and Higher Education
program of the Civilian Research and Development
Foundation and the RF Ministry of Education
(BRHE, RECꢀ007, Y5ꢀC07ꢀ05).
Moscow, 1991) [in Russian].
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Rus. Chem. Bull. 53, 942 (2004).
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