331948-76-6Relevant articles and documents
Synthesis, characterization, biological activity and molecular docking studies of novel schiff bases derived from thiosemicarbazide: Biochemical and computational approach
Tokal?, Feyzi Sinan,Taslimi, Parham,Usanmaz, Hande,Karaman, Muhammet,?endil, K?v?lc?m
, (2021/01/05)
In this study, eight new Schiff base derivatives (2a-h) were synthesized and their inhibition activities against Acetylcholinesterase (AChE), Butyrylcholinesterase (BChE), α-Glucosidase and Lactoperoxidase (LPO) were investigated. Structures of the synthe
Effect of alkyl chain and linking units on mesophase transitions and molecular order of rod-like thiophene mesogens: 13C NMR investigation
Santhosh Kumar Reddy,Lobo, Nitin P.,Narasimhaswamy
supporting information, p. 598 - 612 (2017/12/28)
Thermotropic liquid crystals with π-conjugated cores are increasingly witnessed due to their promising optoelectronic and optophotonic properties. As π-conjugated mesogens are often realized by direct linking of the rings of the core, the mesophase transitions are usually modulated by inserting the required alkyl/alkoxy chains either at a terminal or lateral location. In this work, five mesogens in which thiophene and two phenyl rings are common in the core unit with terminal alkyl/alkoxy chains are investigated to probe the influence of (a) a terminal alkyl chain on the mesophase characteristics, (b) the linking units on the mesophase range and (c) the disparity of thiophene orientational constraints. The mesophase properties reveal that whenever the alkyl chain is located at one end of the molecule, polymesomorphism is observed. The XRD studies reveal layer ordering typical of smectic mesophases with lower temperature and higher order phases, namely SmB and CrE phases. A detailed 13C NMR study of the mesogens in the liquid crystalline phase indicates that the order parameters are governed by the nature of the substitution of thiophene and its linkage with two phenyl rings. Importantly, the 13C NMR data of the terminal chains in the liquid crystalline phase are compared with the recently reported thiophene mesogen in which the n-hexyl chain is located at the lateral position and completely different orientation characteristics were found for the terminal versus lateral chains.
Molecular order and mesophase investigation of thiophene-based forked mesogens
Reddy, K. Rajasekhar,Lobo, Nitin P.,Narasimhaswamy
, p. 6897 - 6909 (2016/07/26)
Thiophene-based rodlike molecules constructed from a three phenyl ring core and terminal dialkoxy chains recognized as forked mesogens are synthesized, and their mesophase properties as well as the molecular order are investigated. The synthesized forked
Synthesis, structural and mesophase characterization of three ring based thiophene liquid crystals
Reddy, M. Kesava,Reddy, K. Subramanyam,Kumar, B.V.N. Phani,Narasimhaswamy
, p. 1 - 24 (2014/07/07)
Thiophene based calamitic mesogens are receiving paramount importance due to their applications in functional organic materials. The insertion of thiophene in the core unit favours a large change in mesophase characteristics as well as application properties in contrast to those mesogens with phenyl ring core alone. In this work, we report the structural as well as mesophase characterization of six mesogens which are built with a core of three phenyl rings and thiophene ring. The thiophene ring is placed at one end of the core and varied the other end with alkyl/alkoxy chains to investigate the mesophase characteristics. The molecular structures of representative mesogens are confirmed by means of FT-IR and Two-dimensional solution NMR techniques. An enantiotropic nematic phase is observed in all the cases as supported by HOPM and DSC techniques. The mesophase characteristics such as melting and clearing temperatures and phase stability are discussed. A dramatic increase in nematic phase stability for the synthesised mesogens is noticed in contrast to two phenyl ring based thiophene mesogens reported in literature.
Non-symmetric liquid crystal dimers: High thermal stability in nematic phase enhanced by thiophene-2-carboxylate moiety
Yeap, Guan-Yeow,Hng, Tiang-Chuan,Takeuchi, Daisuke,Osakada, Kohtaro,Ahmad Kamil Mahmood, Wan,Ito, Masato M.
experimental part, p. 134 - 149 (2011/06/10)
Series of non-symmetric liquid crystal dimers, α-(4- benzylidenechloroaniline-4′-oxy) ω- [4-(thiophene-2-carboxyl) benzylideneaniline-4′-oxy]alkanes incorporating a thiophene-based moiety in one of the two mesogenic units have been synthesized and charact
