Syntheses, Characterisation And Mesophase Investigation Of A New Class Of Hydrazine-Based Liquid Crystal Dimers
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'...
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| Format: | Thesis |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | http://eprints.usm.my/31994/1/UMAIRAH_BINTI_ABD_RANI_24%28NN%29.pdf |
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| Summary: | 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.
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