Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups

Sergey Ponomarenko; Natalia Boiko; Evgeny Rebrov; Aziz Muzafarov; Iain Whitehouse; Robert Richardson; Valery Shibaev

doi:10.1080/10587259908023742

Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups

Sergey Ponomarenko^*, Natalia Boiko, Evgeny Rebrov, Aziz Muzafarov, Iain Whitehouse, Robert Richardson, Valery Shibaev

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

11 Citations (Scopus)

Abstract

For the first time a series of liquid crystalline dendrimers of generations 1 - 4 containing 8, 16, 32 and 64 terminal methoxyphenyl benzoate mesogenic groups respectively have been synthesised. Mesogenic groups were attached to the carbosilane dendritic matrices with terminal allyl groups through -OOC-(CH₂)₁₀-Si(CH₃)₂OSi(CH ₃)₂- spacer by a hydrosilylation reaction. Structure and purity of all new compounds were confirmed by ¹H-NMR spectroscopy and GPC analysis. Phase behaviour of LC dendrimers was investigated by means of polarising optical microscopy, DSC and X-ray methods. All LC dendrimers synthesised display mesophases of smectic types as well as crystalline phases over wide temperature region. Possible structure and arrangement of molecules of LC dendrimers in these mesophases are discussed.

Original language	English
Pages (from-to)	43-50
Number of pages	8
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	332
DOIs	https://doi.org/10.1080/10587259908023742
Publication status	Published - 1 Jan 1999

Keywords

Hydrosilylation
Liquid crystal dendrimers
Smectic mesophase

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Ponomarenko, S., Boiko, N., Rebrov, E., Muzafarov, A., Whitehouse, I., Richardson, R., & Shibaev, V. (1999). Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups. Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, 332, 43-50. https://doi.org/10.1080/10587259908023742

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abstract = "For the first time a series of liquid crystalline dendrimers of generations 1 - 4 containing 8, 16, 32 and 64 terminal methoxyphenyl benzoate mesogenic groups respectively have been synthesised. Mesogenic groups were attached to the carbosilane dendritic matrices with terminal allyl groups through -OOC-(CH2)10-Si(CH3)2OSi(CH 3)2- spacer by a hydrosilylation reaction. Structure and purity of all new compounds were confirmed by 1H-NMR spectroscopy and GPC analysis. Phase behaviour of LC dendrimers was investigated by means of polarising optical microscopy, DSC and X-ray methods. All LC dendrimers synthesised display mesophases of smectic types as well as crystalline phases over wide temperature region. Possible structure and arrangement of molecules of LC dendrimers in these mesophases are discussed.",

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Ponomarenko, S, Boiko, N, Rebrov, E, Muzafarov, A, Whitehouse, I, Richardson, R & Shibaev, V 1999, 'Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups', Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, vol. 332, pp. 43-50. https://doi.org/10.1080/10587259908023742

Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups. / Ponomarenko, Sergey; Boiko, Natalia; Rebrov, Evgeny et al.
In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 332, 01.01.1999, p. 43-50.

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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T1 - Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups

AU - Ponomarenko, Sergey

AU - Boiko, Natalia

AU - Rebrov, Evgeny

AU - Muzafarov, Aziz

AU - Whitehouse, Iain

AU - Richardson, Robert

AU - Shibaev, Valery

PY - 1999/1/1

Y1 - 1999/1/1

N2 - For the first time a series of liquid crystalline dendrimers of generations 1 - 4 containing 8, 16, 32 and 64 terminal methoxyphenyl benzoate mesogenic groups respectively have been synthesised. Mesogenic groups were attached to the carbosilane dendritic matrices with terminal allyl groups through -OOC-(CH2)10-Si(CH3)2OSi(CH 3)2- spacer by a hydrosilylation reaction. Structure and purity of all new compounds were confirmed by 1H-NMR spectroscopy and GPC analysis. Phase behaviour of LC dendrimers was investigated by means of polarising optical microscopy, DSC and X-ray methods. All LC dendrimers synthesised display mesophases of smectic types as well as crystalline phases over wide temperature region. Possible structure and arrangement of molecules of LC dendrimers in these mesophases are discussed.

AB - For the first time a series of liquid crystalline dendrimers of generations 1 - 4 containing 8, 16, 32 and 64 terminal methoxyphenyl benzoate mesogenic groups respectively have been synthesised. Mesogenic groups were attached to the carbosilane dendritic matrices with terminal allyl groups through -OOC-(CH2)10-Si(CH3)2OSi(CH 3)2- spacer by a hydrosilylation reaction. Structure and purity of all new compounds were confirmed by 1H-NMR spectroscopy and GPC analysis. Phase behaviour of LC dendrimers was investigated by means of polarising optical microscopy, DSC and X-ray methods. All LC dendrimers synthesised display mesophases of smectic types as well as crystalline phases over wide temperature region. Possible structure and arrangement of molecules of LC dendrimers in these mesophases are discussed.

KW - Hydrosilylation

KW - Liquid crystal dendrimers

KW - Smectic mesophase

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Ponomarenko S, Boiko N, Rebrov E, Muzafarov A, Whitehouse I, Richardson R et al. Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups. Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals. 1999 Jan 1;332:43-50. doi: 10.1080/10587259908023742

Synthesis, Phase Behaviour and Structure of Liquid Crystalline Carbosilane Dendrimers with Methoxyphenyl Benzoate Terminal Mesogenic Groups

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