0.049 for 680 variables and 4003 contributing reflections [|Fo| > 4σ(Fo)].
One of the butyl chains was disordered (C26–C29) and refined on two
different sites (PP = 0.6 : 0.4) with isotropic atomic displacement
suppdata/dt/b2/b211902a/ for crystallographic data in CIF or other
electronic format.
a single [Lu(L3)(NO3)3] complex occupies the cross-section of
the column. A rough CPK modeling of the V-shape complex
[Lu(L3)(NO3)3] in its extended configuration suggests that the
surface covered by the circumscribed ellipse amounts to 942 Å2
which is only slightly larger than the observed cross-section and
requires only a slight tilt of the elliptical complex in the column
(Fig. S8, ESI†). In spite of their hemidisc molecular shapes and
due to steric hindrance, the complexes likely stacked in an
alternated fashion i.e. antiparallel, forming as such an overall
discoid cross-section.11
1 (a) D. Parker, R. S. Dickins, H. Puschmann, C. Crossland and
J. A. K. Howard, Chem. Rev., 2002, 102, 1977; (b) J.-C. G. Bünzli
and C. Piguet, Chem. Rev., 2002, 102, 1897.
2 For
a comprehensive recent review, see K. Binnemans and
C. Görller-Walrand, Chem. Rev., 2002, 102, 2303.
In conclusion, these preliminary results demonstrate for the
first time that (i) the increase of the curvature of the interface in
the tridentate hexacatenar ligand L3 overcomes the consider-
able expansion brought by the complexation of bulky metallic
cores, thus leading to organized cubic mesophases for zincII and
lanthanideIII complexes and (ii) the minor contraction of the
lanthanide size may induce a transition between cubic and
columnar mesomorphism. The latter point is reminiscent of
the undulating columnar cores model10 which suggests that a
columnar hexagonal phase can be transformed into a cubic
phase when large oscillation amplitudes are induced within the
columns. The replacement of the small LuIII ion with the larger
EuIII and DyIII ions in [Ln(L3)(NO3)3] seems to be sufficient for
inducing such structural variations.
3 (a) C. Piechocki, J. Simon, J. J. André, D. Guillon, P. Petit,
A. Skoulios and P. Weber, Chem. Phys. Lett., 1985, 122, 124;
(b) H. Miwa, N. Kobayashi, K. Ban and K. Ohta, Bull. Chem. Soc.
Jpn., 1999, 72, 765; (c) K. Binnemans, K. Lodewyckx, B. Donnio
and D. Guillon, Chem. Eur. J., 2002, 8, 1101.
4 K. Binnemans, Y. G. Galyametdinov, R. Van Deun, D. W. Bruce,
S. R. Collinson, A. P. Polishchuk, I. Bikchantaev, W. Haase, A. V.
Prosvirin, L. Tinchurina, U. Litvinov, A. Gubajdullin, A. Rakhmat-
ullin, K. Uytterhoeven and L. Van Meervelt, J. Am. Chem. Soc.,
2000, 122, 4335.
5 (a) M. G. B. Drew, M. J. Hudson, P. B. Iveson, C. Madic and M. L.
Russel, J. Chem. Soc., Dalton Trans., 2000, 2711; (b) M. G. B. Drew,
P. B. Iveson, M. J. Hudson, J. O. Liljenzin, L. Spjuth, P.-Y. Cordier,
A. Enarsson, C. Hill and C. Madic, J. Chem. Soc., Dalton Trans.,
2000, 821.
6 (a) B. Donnio and D. W. Bruce, Struct. Bonding (Berlin), 1999,
95, 193; (b) C. Tschierske, Angew. Chem., Int. Ed., 2000, 39, 2454;
(c) R. Ziessel, L. Douce, A. El-ghayoury, A. Harriman and
A. Skoulios, Angew. Chem., Int. Ed., 2000, 39, 1489.
Financial support from the Swiss National Science Found-
ation, National Research Programme 47 ‘Supramolecular
Functional Materials’ is gratefully acknowledged.
7 (a) G. Pelzl, S. Diele and W. Weissflog, Adv. Mater., 1999, 11, 707;
(b) C. Tschierske, J. Mater. Chem., 2001, 11, 2647.
8 (a) H. Nozary, C. Piguet, P. Tissot, G. Bernardinelli, J.-C. G. Bünzli,
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12274; (b) H. Nozary, C. Piguet, J.-P. Rivera, P. Tissot, G. Bernar-
dinelli, N. Vulliermet, J. Weber and J.-C. G. Bünzli, Inorg. Chem.,
2000, 39, 5286; (c) H. Nozary, C. Piguet, J.-P. Rivera, P. Tissot,
P.-Y. Morgantini, J. Weber, G. Bernardinelli, J.-C. G. Bünzli,
R. Deschenaux, B. Donnio and D. Guillon, Chem. Mater., 2002, 14,
1075.
Notes and references
‡ Crystal data for 1: [(C21H17N5)Zn(NO3)2](C3H7NO), Mr = 601.9,
T = 200 K, monoclinic, P21/c, Z = 4, a = 9.6975(5), b = 13.3453(6),
c = 20.2749(11) Å, β = 96.930(6)Њ, V = 2604.7(3) Å3. 20743 measured
reflections, 5081 unique reflections (Rint = 0.047), R = 0.036, ωR = 0.038
for 361 variables and 3253 contributing reflections [|Fo| > 4σ(Fo)].
CCDC reference number 194452.
9 D. W. Bruce, Acc. Chem. Res., 2000, 33, 831.
§ Crystal data for L3-C4: C61H77N5O10, Mr = 1040.4, T = 200 K, triclinic,
10 B. Donnio, B. Heinrich, T. Gulik-Krzywicki, H. Delacroix,
D. Guillon and D. W. Bruce, Chem. Mater., 1997, 9, 2951.
11 A. G. Serrette, C. K. Lai and T. M. Swager, Chem. Mater., 1994, 6,
2252.
¯
P1, Z = 2, a = 12.5210(9), b = 14.7685(11), c = 17.6867(12) Å,
α = 113.831(3), β = 91.239(8), γ = 101.452(9)Њ, V = 2913.2(4) Å3. 23214
measured reflections, 10651 unique reflections (Rint = 0.078), R = ωR =
D a l t o n T r a n s . , 2 0 0 3 , 7 6 9 – 7 7 2
772