Metal‐Containing Liquid Crystals

Giroud‐Godquin, Anne‐Marie

doi:10.1002/9783527620623.ch11

Cited by 34 publications

(22 citation statements)

References 207 publications

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“…In 1982, Giroud-Godquin and Rassat investigated the tris[1,3-bis(4-dodecylphenyl)propane-1,3-dionato]iron(III) complex. [55,56] They observed a highly viscous mesophase, which was not further characterized. Swager and co-workers prepared related compounds, [57] including the dodecyloxy analog of the iron(III) complex reported by Giroud-Godquin and Rassat.…”

Section: Resultsmentioning

confidence: 94%

Liquid‐Crystalline Ternary Rare‐Earth Complexes

et al. 2008

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The thermal behavior of the metallomesogens [Ln-(C 12 C 16 dbm) 3 (phen)] (Ln = La, Nd, Eu, Gd, Tb, Dy, Er, Yb; C 12 C 16 dbm = 1-(4-dodecyloxyphenyl)-3-(4-hexadecyloxyphenyl)propane-1,3-dionate; phen = 1,10-phenanthroline) was investigated. The complexes of the light lanthanides (Ln = La, Nd) are not mesomorphic, whereas the complexes of the heavy lanthanides (Ln = Eu, Gd, Tb, Dy, Er, Yb) exhibit

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Section: Resultsmentioning

confidence: 94%

Liquid‐Crystalline Ternary Rare‐Earth Complexes

et al. 2008

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“…В литературе содержится большое количество обзорных статей [2][3][4][5][6][7], многочис-ленные главы к книгам [8][9][10][11][12][13], а также монография Хосе-Луиса Серрано [14], практически полностью охватывающих исследования в области металл-содержащих ЖК вплоть до 2000-х годов. Кроме того, вышло много обзоров по отдельным направлениям в области металломезогенов, например лантанидомезогенов [15][16][17], золото-содержащих жидких кристаллов [18,19], ферро-ценомезогенов [20][21][22], ионных металломезогенов [23,24], полимерных металломезогенов [25,26], лиотропных металломезогенов [27], неоргани-ческих или металлоколлоидных жидких крис-таллов [28][29][30] и жидкокристаллических металло-дендримеров [31].…”

Section: к вопросу о классификации металломезогеновunclassified

Metallomesogens: Retrospectives and Perspectives

Kadkin¹,

Domracheva²,

Ovchinnikov³

2015

Liq. Cryst. and their Appl.

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“…[7] Swager and Zheng found that tris(b-diketonato) complexes of Fe III , Mn III , and Cr III complexes should have 12 or more alkyl chains (attached to the b-diketone ligand) in order to exhibit stable mesomorphism. This result was totally unexpected, because work by Giroud-Godquin and Rassat has shown that six alkyl chains are insufficient for octahedral tris(bdiketonato)iron(iii) complexes to form a real mesophase.…”

Section: Koen Binnemans* and Katleen Lodewyckxmentioning

confidence: 99%

Coordinatively Unsaturated Metal Centers as Building Blocks for High Coordination Number Metallomesogens

Binnemans

Lodewyckx

2001

Angew. Chem.

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Most literature on metal-containing liquid crystals (metallomesogens) is devoted to compounds with Rh I , Ir I , Ni II , Pd II , Pt II , Cu II , and Ag I as the central metal ion, because these complexes have a linear or planar geometry and mimic therefore conventional organic calamitic (rodlike) liquid crystals. [1] Obtaining high coordination number calamitic metallomesogens is a challenge. [2] One approach is to make the ligand as anisometric as possible by increasing the number of aromatic rings. [3, 4] The design of lanthanide-containing liquid crystals is difficult [5] because the trivalent lanthanide ions have even 0.22 mmol) was heated to reflux with stirring for 1 d. After cooling, the solvent was removed in vacuo. The residue was purified by column chromatography on silica gel (CH 2 Cl 2 /ethanol (30/1) as eluent). Yield: 128 mg (59 %). (Bu 4 N) 2 -2: Positive-ion FAB-MS: m/z: 3198 [M ]; 13 C NMR (67.9 MHz, CD 2 Cl 2 , 208C, TMS): d 133.8 (m, ipso-Ph), 131.8, 130.8 (m, o-Ph), 130.1 (m, p-Ph), 127.9 (m, m-Ph), 59.0 (s, Bu), 37.4 (d, 1 J(P,C) 30.8 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 17.5 (d, 2 J(P,C) 20.0 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 24.7 (s, Bu), 21.6 (d, 3 J(P,C) 3.8 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 20.4 (s, Bu), 14.1 (s, Bu); 31 P NMR (109.3 MHz, CDCl 3 , 208C): d À 29.9 (s). 3 a: Positive-ion FAB-MS: m/z: 2914 [M ]; 31 P NMR (CDCl 3 , 208C): d À 30.5 (s). 3 b: Elemental analysis calcd for C 60 H 64 I 2 P 4 Se 8 Re 6´C H 2 Cl 2´1 .5 H 2 O: C 24.23, H 2.30, I 8.39; found: C 24.45, H 2.35, I 8.94; positive-ion FAB-MS: m/z: 2914 [M ]; 13 C NMR (CD 2 Cl 2 , 208C): d 134.8 (m, ipso-Ph), 132.1 (m, o-Ph), 130.9 (m, p-Ph), 128.3 (m, m-Ph), 37.5 (d, 1 J(P,C) 33.0 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 37.3 (d, 1 J(P,C) 29.6 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 27.1 (d, 2 J(P,C) 14.0 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 27.0 (d, 2 J(P,C) 14.0 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 21.4 (s, (PCH 2 CH 2 CH 2 ) 2 ), 21.3 (s, (PCH 2 CH 2 CH 2 ) 2 ); 31 P NMR (CDCl 3 , 208C): d À 31.0 (s), À 31.3 (s). 4-(SbF6 ) 2 : Elemental analysis calcd for C 90 H 96 F 12 P 6 Sb 2 Se 8 Re 6 : C 30.16, H 2.70; found C 30.18, H 2.85; positive-ion FAB-MS: m/z: 3586 [M ]; 13C NMR (CD 2 Cl 2 , 208C): d 133.6 (m, ipso-Ph), 133.0 (m, o-Ph), 131.8, 131.4 (m, p-Ph), 128.7 (m, m-Ph), 37.9 (d, 1 J(P,C) 33.5 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 26.6 (d, 2 J(P,C) 15.1 Hz, (PCH 2 CH 2 CH 2 ) 2 ), 21.7 (d, 3 J(P,C) 3.9 Hz, (PCH 2 CH 2 CH 2 ) 2 ); 31 P NMR (CD 2 Cl 2 , 208C): d À 29.7 (s).

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Metal‐Containing Liquid Crystals

Cited by 34 publications

References 207 publications

Liquid‐Crystalline Ternary Rare‐Earth Complexes

Liquid‐Crystalline Ternary Rare‐Earth Complexes

Metallomesogens: Retrospectives and Perspectives

Coordinatively Unsaturated Metal Centers as Building Blocks for High Coordination Number Metallomesogens

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