메뉴 건너뛰기
Chemistry of Materials
Volumn 20, Issue 11, 2008, Pages 3675-3687
Cubic phase formation and interplay between alkyl chains and hydrogen bonds in 1,2-bis(4′-n-alkoxybenzoyl)hydrazines (BABH-n)
Author keywords

[No Author keywords available]
Indexed keywords

ALKYLATION; AROMATIC COMPOUNDS; CHAIN LENGTH; HYDRAZINE; HYDROGEN; MECHANISMS; MOLECULES; NONMETALS; PHASE TRANSITIONS; X RAY ANALYSIS; X RAY DIFFRACTION ANALYSIS;
EID: 47049129650     PISSN: 08974756     EISSN: None     Source Type: Journal    
DOI: 10.1021/cm703684v     Document Type: Article
Times cited : (53)
References (107)
  • 1
    • 0004206658 scopus 로고
    • Leonard Hill: Glasgow, U.K, including earlier references on thermotropic cubic phases
    • Gray, G. W.; Goodby, J. W. In Smectic Liquid Crystals, Textures and Structure; Leonard Hill: Glasgow, U.K., 1984; pp 68-81, including earlier references on thermotropic cubic phases.
    • (1984) Smectic Liquid Crystals, Textures and Structure , pp. 68-81
    • Gray, G.W.1    Goodby, J.W.2
  • 2
    • 0000762548 scopus 로고    scopus 로고
    • Demus, D, Goodby, J, Gray, G. W, Spiess, R-W, Vill, V, Eds, Wiley-VCH: Weinheim, Germany
    • Diele, S.; Goring, P. In Handbook of Liquid Crystals; Demus, D., Goodby, J., Gray, G. W., Spiess, R-W., Vill, V., Eds.; Wiley-VCH: Weinheim, Germany, 1998; Vol. 2B, pp 887-900.
    • (1998) Handbook of Liquid Crystals , vol.2 B , pp. 887-900
    • Diele, S.1    Goring, P.2
  • 7
    • 0004039998 scopus 로고
    • NASA Technical Note D-5541; National Aeronautics and Space Administration: Washington, D.C
    • Schoen, A. H. Infinite Periodic Minimal Surfaces without Self-Intersections; NASA Technical Note D-5541; National Aeronautics and Space Administration: Washington, D.C., 1970; pp 1-92.
    • (1970) Infinite Periodic Minimal Surfaces without Self-Intersections , pp. 1-92
    • Schoen, A.H.1
  • 10
    • 47049101393 scopus 로고    scopus 로고
    • Bicontinuous Liquid Crystals; Lynch, M. L., Spicer, P. T., Eds.; Surfactant Science Series; CRC Press: Boca Raton, FL, 2005; 127.
    • Bicontinuous Liquid Crystals; Lynch, M. L., Spicer, P. T., Eds.; Surfactant Science Series; CRC Press: Boca Raton, FL, 2005; Vol. 127.
  • 12
    • 0000830664 scopus 로고
    • (b) Larsson, K. Nature 1983, 304, 664.
    • (1983) Nature , vol.304 , pp. 664
    • Larsson, K.1
  • 14
    • 0022700706 scopus 로고    scopus 로고
    • Im3m first paper: Nguyen, H. T.; Destrade, C.; Levelut, A.-M.; Malthête, J. J. Phys. (Paris) 1986, 47, 553-557.
    • (a) Im3m first paper: Nguyen, H. T.; Destrade, C.; Levelut, A.-M.; Malthête, J. J. Phys. (Paris) 1986, 47, 553-557.
  • 16
    • 47049113406 scopus 로고    scopus 로고
    • Thermotropic Pn3m first paper: Ujiie, S.; Mori, A. Mol. Cryst. Liq. Cryst. 2005, 437, 25-31.
    • (a) Thermotropic Pn3m first paper: Ujiie, S.; Mori, A. Mol. Cryst. Liq. Cryst. 2005, 437, 25-31.
  • 24
    • 47049111055 scopus 로고    scopus 로고
    • Gray, G. W. Zehn Arbeiten über Flüssige Kristalle; Kongress-und Tagungs-berichte der Martin-Luther-Universität: Halle-Wittenberg, 1986; pp 22-42.
    • (f) Gray, G. W. Zehn Arbeiten über Flüssige Kristalle; Kongress-und Tagungs-berichte der Martin-Luther-Universität: Halle-Wittenberg, 1986; pp 22-42.
  • 42
    • 0000602488 scopus 로고    scopus 로고
    • Demus, D, Goodby, J, Gray, G. W, Spiess, H.-W, Vill, V, Eds, Wiley-VCH: Weinheim, Germany
    • Nguyen, H.-T.; Destrade, C.; Malthête, J. In Handbook of Liquid Crystals; Demus, D., Goodby, J., Gray, G. W., Spiess, H.-W., Vill, V., Eds.; Wiley-VCH: Weinheim, Germany, 1998; Vol. 2B, pp 865-885
    • (1998) Handbook of Liquid Crystals , vol.2 B , pp. 865-885
    • Nguyen, H.-T.1    Destrade, C.2    Malthête, J.3
  • 87
    • 0038569732 scopus 로고
    • International Union for Crystallography, 2nd revised ed, Hahn, T, Ed, Kluwer Academic: Dordrecht, The Netherlands
    • International Union for Crystallography. International Tables for Crystallography, 2nd revised ed.; Hahn, T., Ed.; Kluwer Academic: Dordrecht, The Netherlands, 1989; Vol. A.
    • (1989) International Tables for Crystallography , vol.A
  • 88
    • 47049109579 scopus 로고    scopus 로고
    • In the systems with cubic symmetry, the ratios of reciprocal d of observed peaks are √n1:√2:√3, and the numbers (n1, n2, and n 3) inside √, or those times integer, should correspond to h2, k2, l2 when the diffraction is assigned to (hkl) planes. Because the (hkl) planes with h2, k2, l2, 7 and 15 are not possible with any cubic systems, the sequence of numbers must be doubled. Indexation of diffractions assigned to (321) and (521) was made in this way see Figures 2 and 4, and the Supporting Information, Figures S1, S2, and S4-S6
    • 2 = 7 and 15 are not possible with any cubic systems, the sequence of numbers must be doubled. Indexation of diffractions assigned to (321) and (521) was made in this way (see Figures 2 and 4, and the Supporting Information, Figures S1, S2, and S4-S6).
  • 90
    • 47049119819 scopus 로고    scopus 로고
    • For all BABH-n, a broad halo was detected in the small-angle region at temperatures even in the isotropic liquid I phase in the vicinity of the Cub/SmC phase, and the spacing is plotted with symbols V or T. The selected patterns are displayed in the Supporting Information, Figure S7. The presence of such a halo indicates that there still remain the constituent aggregates that construct the Cub/SmC phase structure, which would gradually collapse in the higher-temperature region. A similar observation was reported for other Cub-phase-forming materials (see refs 15e,f, 25, 27c,d, and 56b, which also exhibit the so-called DSC hump both on heating and on cooling; in BABH-n, however, the transition peak into the I phase was followed by not a clear hump but only a tail extended at the higher temperature side see Figure 1
    • For all BABH-n, a broad halo was detected in the small-angle region at temperatures even in the isotropic liquid I phase in the vicinity of the Cub/SmC phase, and the spacing is plotted with symbols V or T. The selected patterns are displayed in the Supporting Information, Figure S7. The presence of such a halo indicates that there still remain the constituent aggregates that construct the Cub/SmC phase structure, which would gradually collapse in the higher-temperature region. A similar observation was reported for other Cub-phase-forming materials (see refs 15e,f, 25, 27c,d, and 56b), which also exhibit the so-called DSC "hump" both on heating and on cooling; in BABH-n, however, the transition peak into the I phase was followed by not a clear hump but only a tail extended at the higher temperature side (see Figure 1).
  • 97
    • 47049117062 scopus 로고    scopus 로고
    • Absorption in the range 3030-3150 cm-1, which has two evident peaks at 3040 and 3070 cm-1, is assigned to the C-H stretching vibrations of the benzene ring, and a shoulder peak around 3200 cm-1 is probably the two-phonon band of the C=O fundamental vibration observed at around 1640 cm-1 48b Thus, the curve-fitting procedure was performed in the range 3250-3600 cm-1
    • -1.
  • 98
    • 47049096539 scopus 로고    scopus 로고
    • free N-H being the coefficients for hydrogen-bonded and free N-H vibration bands, respectively) depended on n and ranged between 5.1 and 9.7 (see the Supporting Information, Table S2). More detailed procedures are described in the Supporting Information, Figure S13.
    • free N-H being the coefficients for hydrogen-bonded and free N-H vibration bands, respectively) depended on n and ranged between 5.1 and 9.7 (see the Supporting Information, Table S2). More detailed procedures are described in the Supporting Information, Figure S13.
  • 99
    • 0000661384 scopus 로고    scopus 로고
    • Demus, D, Goodby, J, Gray, G. W, Spiess, H.-W, Vill, V, Eds, Wiley-VCH: Weinheim, Germany
    • Fairhurst, C. E.; Fuller, S.; Gray, J.; Holms, M. C.; Tiddy, G. J. T. In Handbook of Liquid Crystal; Demus, D., Goodby, J., Gray, G. W., Spiess, H.-W., Vill, V., Eds.; Wiley-VCH: Weinheim, Germany, 1998; Vol. 3, pp 341-392.
    • (1998) Handbook of Liquid Crystal , vol.3 , pp. 341-392
    • Fairhurst, C.E.1    Fuller, S.2    Gray, J.3    Holms, M.C.4    Tiddy, G.J.T.5
  • 102
    • 47049115799 scopus 로고    scopus 로고
    • CH2) were evaluated for 70 °C, but we used without correcting the temperature effect, because of the expectation that the partial are more or less reduced for the alkyl chains with one end attached to an aromatic core such as in our case.
    • CH2) were evaluated for 70 °C, but we used without correcting the temperature effect, because of the expectation that the partial volumes are more or less reduced for the alkyl chains with one end attached to an aromatic core such as in our case.
  • 103
    • 5244367703 scopus 로고
    • 8th ed, Stecher, P. G, Windholz, M, Leahy, D. S, Eds, Merck: Rahway, NJ
    • Merck Index, 8th ed.; Stecher, P. G., Windholz, M., Leahy, D. S., Eds.; Merck: Rahway, NJ, 1968.
    • (1968) Merck Index
  • 104
    • 47049093445 scopus 로고    scopus 로고
    • 38b,c
    • 38b,c
  • 107
    • 47049106053 scopus 로고    scopus 로고
    • Strictly speaking, the two alkyl chains might be obliquely directed with respect to the long axis of the core part, especially in the SmC phase, and thus the molecules would have somewhat of a zig-zag shape. In this discussion, however, we ignore this fact and regard the molecular shape as being rodlike, if the alkyl and hydrogen-bonding effects are equally balanced. Also, in Figure 12, only a half of the molecule is schematically depicted for clarity.
    • Strictly speaking, the two alkyl chains might be obliquely directed with respect to the long axis of the core part, especially in the SmC phase, and thus the molecules would have somewhat of a zig-zag shape. In this discussion, however, we ignore this fact and regard the molecular shape as being rodlike, if the alkyl and hydrogen-bonding effects are equally balanced. Also, in Figure 12, only a half of the molecule is schematically depicted for clarity.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.