Syntheses, Characterisation And Mesophase Investigation Of A New Class Of Hydrazine-Based Liquid Crystal Dimers

Abd Rani, Umairah (2016) Syntheses, Characterisation And Mesophase Investigation Of A New Class Of Hydrazine-Based Liquid Crystal Dimers. Masters thesis, Universiti Sains Malaysia.

[img]
Preview
PDF
Download (790Kb) | Preview

    Abstract

    Empat siri baru hablur cecair dimer tak simetri yang berdasarkan dibenzilidinahidrazina, N-{4[10-(16-desiloksifenilimino) metil)fenoksi] alkiloksiben zilidina}-N'-(4'-desiloksibenzilidina)hidrazina (SB-(CH2)n-HZ), N-{4[10-(16-desilok sifenildiazenil)fenoksi]alkiloksibenzilidina}-N'-(4'-desiloksibenzilidina) hidrazine (A Z-(CH2)n-HZ), N-[4-{12-[18-((S)-(-)-23-metilbutiloksi)karbonilfenil]fenoksi}alkilok sibenzilidina]-N'-(4'-desiloksibenzilidina)hidrazina (BP-(CH2)n-HZ) dan N-(4-alkil oksibenzilidina)-N'-[4'-(kolesteriloksikarbonil)alkiloksibenzilidina]hidrazina (Chol- (CH2)m-HZ-(CH2)n) telah disintesis dan dicirikan. Kesemua dimer ini mengandungi dibenzilidinahidrazina sebagai salah satu kumpulan mesogenik dan berbeza antara satu sama lain dari segi cabang sisi dan panjang spaser. Struktur molekul bagi dimer tersebut telah dijelaskan oleh analisis CHN, spektroskopi FT-IR, 1D dan 2D-NMR. Ciri hablur cecair dimer ini telah dikaji dengan menggunakan POM, DSC dan XRD. Four new series of non-symmetric dibenzylidenehydrazine-based liquid crystal dimers, N-{4[10-(16-decyloxyphenylimino)methyl)phenoxy] alkyloxybenzy lidene}-N'-(4'-decyloxybenzylidene)hydrazines (SB-(CH2)n-HZ), N-{4[10-(16-decyl oxyphenyldiazenyl)phenoxy]alkyloxybenzylidene}-N'-(4'-decyloxybenzylidene) hyd razines (AZ-(CH2)n-HZ), N-[4-{12-[18-((S)-(-)-23-methylbutyloxy)carbonylphenyl] phenoxy} alkyloxybenzylidene]-N'-(4'-decyloxybenzylidene) hydrazines (BP-(CH2)n -HZ) and N-(4-alkylxybenzylidene)-N'-[4'-(cholesteryloxycarbonyl)alkyloxybenzylid ene]hydrazines (Chol-(CH2)m-HZ-(CH2)n) had been synthesised and characterised. All dimers incorporated dibenzylidenehydrazine as one of the mesogenic arms and differ in terms of the other side arms and spacer parity. The molecular structures of these dimers were elucidated by CHN, FT-IR, 1D and 2D-NMR spectroscopy. Their liquid crystalline properties were investigated using POM, DSC and XRD.

    Item Type: Thesis (Masters)
    Subjects: Q Science > QD Chemistry > QD1-999 Chemistry
    Divisions: Pusat Pengajian Sains Kimia (School of Chemistry) > Thesis
    Depositing User: Mr Noorazilan Noordin
    Date Deposited: 10 Feb 2017 09:53
    Last Modified: 12 Apr 2017 11:23
    URI: http://eprints.usm.my/id/eprint/31994

    Actions (login required)

    View Item
    Share