76622-42-9Relevant articles and documents
Mesomorphic behaviour, optical and quantum computational study: Effect of electron density on newly synthesized liquid crystalline positional isomers
Vyas, Akshay,Koshti, Rohit R.,Patel,Sangani, Chetan B.,Prajapati,Yao, Yongfang,Duan, Yong-Tao
, (2021/11/30)
Effect of position isomer in newly synthesized two liquid crystalline series having nitro and chloro groups at terminal and lateral position, with imine and cinnamoyloxy linkages was studied. The nitro and chloro groups in the aromatic end of the molecule are interchanged with each other at terminal and lateral position, giving rise to positional isomers. All synthesized compounds were characterized with standard spectroscopic techniques, Infrared, Ultra-Violet and Proton magnetic resonance spectroscopy. The mesophase behaviour was observed by a Polarizing optical microscope equipped with a heating stage and was confirmed by Differential scanning calorimetry with respective transition enthalpies of mesophase transition. The mesogenic derivative of both prepared series showed nematic and smectic A mesophase. DFT method was used to obtain optimized geometry of the molecules. The optimized geometry was used to obtain the Molecular electrostatic potential map, dipole moment, HOMO-LUMO and twist angle of the prepared series. The interaction between the molecules was studied on the base of electrostatic potential and HOMO-LUMO. The phase transition of the present two series is compared with each other and with three structurally related compounds to evaluate the effect of planarity, central linkage and position of substitution on their mesophase behaviour.
Synthesis and mesomorphic investigations of liquid crystalline compounds having a benzothiazole ring
Thaker,Chothani,Patel,Dhimmar,Solanki,Patel, Neeraj,Patel,Makawana
, p. 64 - 76 (2013/06/26)
Two homologous series of calamitic liquid crystals containing a benzothiazole ring and two different linkages have been prepared, and their liquid crystalline properties are studied and compared with each other and those of similar structure. The mesogens with only the cinnamate linking group showed better thermal properties than those with an ester. Nematic and smectic phases were observed. All the compounds of both the series were characterized by elemental analysis, FT-IR, mass spectrometry, 1H-NMR, and 13C-NMR. Phase transition temperatures and the thermal parameters were obtained from differential scanning calorimetery (DSC). The textural observations were performed using hot-stage Polarizing Optical Microscopy (POM).
Synthesis, characterization and mesomorphic properties of new rod-like thiophene based liquid crystals
Thaker,Patel,Dhimmar,Solnki,Chothani,Patel,Patel,Makavana
, p. 98 - 113 (2012/10/07)
Two new mesogenic homologous series of Schiff base esters, 2-[4-(4-n-Alkoxy benzoyloxy) benzylidenamino] 3-cyno thiophine (Series-A) and Schiff base cinnamates, 2-[4-(4-n-alkoxy cinnamoyloxy) benzylidenamino] 3-cyano thiophene (Series-B), comprising a thiophene moiety were synthesized. Structural elucidation was carried out using elemental analysis and spectroscopic techniques such as FT-IR, 1H-NMR and 13C-NMR, and mass spectrometry. The mesomorphic properties and thermal stabilities of the title compounds were studied by using differential scanning calorimetry and optical polarizing microscopy. All the derivatives are mesomorphic in nature showing the nematic phase, and the higher members of Series-A show a smectic C phase whereas Series-B exhibits only the nematic mesophase. The mesomorphic properties of the present series are compared with other structurally related compounds. Taylor and Francis Group, LLC.
New mesogenic homologous series of schiff base cinnamates comprising naphthalene moiety
Prajapati,Thakkar, Viral,Bonde, Nilesh
, p. 41 - 48 (2007/10/03)
New mesogenic homologous series of Schiff base cinnamates comprising a naphthalene moiety were prepared by condensing different 4(4'-n-alkoxy cinnamoyloxy) benzaldehydes with 2-amino naphthalene. All the synthesized compounds were characterized by combination of elemental analysis and spectroscopic techniques. All the homologues synthesized exhibit mesomorphism. The mesomorphic properties of the present series are compared with other structurally related series.
SYNTHESIS AND MESOMORPHIC PROPERTIES OF p-(p'-n-ALKOXYCINNAMOYLOXY)BENZYLIDENE-p"-HALOGEN SUBSTITUTED ANILINE
Rajput, Sadhana,Agrawal, Yadvendra K.
, p. 159 - 167 (2007/10/02)
Synthesis and properties of a new homologous series p-(p'-n-alkoxycinnamoyloxy)benzylidene-p"-fluoroaniline with fluoro terminal groups are described.They exhibit mesomorphic behaviour over a wide range of temperatures.The mesomorphic behaviour has been s
Synthesis and Study of New Mesogens II: p-(p'-n-Alkoxycinnamoyloxy)-benzylidene p''-anisidines (1) and p-(p'-n-Alkoxycinnamoyloxy)-benzylidene anilines (2)
Lohar, J. M.,Dave, J. S.
, p. 279 - 288 (2007/10/02)
Two new homologous series of liquid crystals viz. p-(p'-n-alkoxycinnamoyloxy)benzylidene p''-anisidines (1) and p-(p'-n-alkoxycinnamoyloxy)benzylidene anilines (2) comprising twenty four mesogens have been synthesized.Both are high melting series of mesom
