Abstract
Comprehensive study on the homologous series of compounds in the form A-R- HHB are synthesized with central rigid core as benzoic acids together with substituent’s alkoxy (A) and alkyl (R) group of equal chain lengths from 5 to 10 are connected to hexyl-p-hydroxy benzoate (HHB). These complexes form supramolecular structures by self assembling process due to intermolecular hydrogen bonding. The formation is analyzed with techniques involving polarizing optical microscope, infrared spectroscopy, proton NMR spectroscopy and powdered X-ray diffraction. Results suggest that complexes arise from both A and R groups exhibit enantiotropic layered texture of crystal G phase observed by microscopic studies due to flexible nature of mesogenics. The conversion of free to molecular complexes is determined with variations in spectral shifts between its terminal groups COOH and OH of molecules involving inter molecular hydrogen bonding and its bonding index by FTIR spectra. The changes in structure and dynamics due to hydrogen bonding in complexes are convinced by proton NMR spectra with chemical shifts in specified range. The defects in crystal structure responsible for enantiotropic phenomena are analyzed by powdered X ray diffraction.
Highlights
Over the past decades the design and synthesis of new liquid crystalline molecules [1] has considerably broadened mesophase stability [2]especially with rod like molecules due to intermolecular interactions [3,4] that play vital role in the formation of liquid crystal textures [5]
Comprehensive study on the homologous series of compounds in the form A-R-HHB are synthesized with central rigid core as benzoic acids together with substituent’s alkoxy (A) and alkyl (R) group of equal chain lengths from 5 to 10 are connected to hexyl-p-hydroxy benzoate (HHB)
Liquid crystals possess fluid like properties are greatly influenced with non mesogenics stems the interaction leading to structural variations by self assembling [9,10,11,12,13] process that greatly influence the physical properties due to defects that exist in solid state where individual displacements of atoms are suppressed
Summary
Over the past decades the design and synthesis of new liquid crystalline molecules [1] has considerably broadened mesophase stability [2]especially with rod like molecules due to intermolecular interactions [3,4] that play vital role in the formation of liquid crystal textures [5]. These organized structures are built by strategic units leading to supramolecular structures [6,7] enable meaningful relationship cutting across its entities with their functional relationships attributed involves hydrogen bonding [8].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
