Download or read book Bent Shaped Liquid Crystals written by Hideo Takezoe and published by CRC Press. This book was released on 2017-07-20 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bent-Shaped Liquid Crystals: Structures and Physical Properties provides insight into the latest developments in the research on liquid crystals formed by bent-shaped mesogens. After a historical introduction, the expert authors discuss different kinds of mesophase structures formed by bent-shaped molecules. This book devotes the majority of its pages to physical properties such as polar switching, optics and non-linear optics, and behavior in restricted geometries. However, as chemistry is often highly relevant to the emergence of new phases, particularly with reflection symmetry breaking, it also involves a broad spectrum of interesting chemistry viewpoints.
Download or read book Bent core Liquid Crystals written by Hideo Takezoe and published by CRC Press. This book was released on 2015-12-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insight into the latest developments in the research on liquid crystals formed by bent-core mesogens. After a short historical introduction, the authors discuss different kinds of mesophase structures formed by bent-core molecules. A majority of this book is devoted to physical properties such as elasticity, optics and non-linear optics, and behavior in restricted geometries. As chemistry is often relevant to the emergence of new phases, particularly with chiral symmetry breaking, chemistry viewpoints are broadly involved in this book.
Download or read book Nanostructures Of Bent Shaped And Polar Liquid Crystals written by Rony Saha and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phases of matter between isotropic liquid and well-ordered crystalline solid phases are known as liquid crystal phases. The molecular architecture, which includes structure, polarity, and topology, influences the liquid crystal phases formed by mesomorphic materials. The most common and widely studied liquid crystal phase is the nematic phase formed by rod-like molecules. The molecules in this phase have only orientational order, which means they prefer to align along a single axis while their positions are random addition they do not have polarity. Flexible bent-shape molecules where an odd number of methylene groups connect two rigid arms exhibit twist-bend nematic (N_TB)" phase. In the N_TB phase, the molecules have a heliconical structure with a 10 nm range pich. Rigid achiral bent-shape materials typically show polar and chiral smectic structures because tilted and polar packing makes each smectic layer chiral. Lastly, rod-shaped molecules with large (about 10 Debye) dipole moments form the ferroelectric nematic phase predicted by Max Born in 1916 but experimentally observed only a few years ago. In my dissertation, I will describe various studies of the nanostructure of different flexibly bent-core liquid crystal materials exhibiting the N_TB Phase, structures of ferroelectric and antiferroelectric smectic phases of rigid bent-shape materials, and multiple ferroelectric nematic phases of a highly polar rod-shape substance.
Download or read book Synthesis and Characterization of Bent shaped Liquid Crystal written by Kala a/p Shanku Pillay and published by . This book was released on 2006 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of liquid crystal is relatively new area of chemistry, and therefore generates a large frontier of research. The ability of being able to produce high resolution display screens for use in televisions or laptop computers with a very low power consumption, has revolutionised the technological market for this product. As a result of the success of the knowledge already known about liquid crystals and their properties, and their as yet unexplored potential, it is not suprising that there is an extremely large amount of research into the area. In relation to this, in this project, a five ring bent-shaped liquid crystal, which is relatively new compound in liquid crystalline phase, was synthesized using several organic synthesis methods, such as, Diazonium coupling reaction, Williamson ether synthesis, hydrolysis and reaction with resorcinol. The compounds synthesized were characterized through FTIR analysis, melting point, and its physical apperances. Other than that, the percent yield for each compound also have been calculated. The compound synthesized in first step, ethyl4-4-(hydroxyphenylazo)benzoate was a red color solid with melting point at 235 C and the percent yield was 52.07%. In second step 3.542 grams of Ethyl-4-(4-hexadecanoxyphenylazo)benzoate which orange in color with melting point of 135 C was obtained. The percent yield from the reaction was 42.11%. The third compound synthesized was yellow color solid with melting point of 280-290 C and the final compound was 1,3-Phenelyne bis[4-(4-hexadecanoxyphenylazo)benzoate], a pale yellow color solid with melting point at range of 130-135 C was obtained.
Download or read book Advances in Liquid Crystals written by Yuan Ming Huang and published by Trans Tech Publications Ltd. This book was released on 2010-01-12 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). Liquid crystals are substances that have properties which are intermediate between those of a conventional liquid and those of a solid crystal. This special collection comprises peer-reviewed papers that are concerned with all aspects of liquid crystal science and technology. The volume consists of five parts: plenary lectures, the molecular design and synthesis of liquid crystals, the characterization of liquid crystals, the applications of liquid crystals, and the emerging technologies and materials relevant to information display.
Download or read book Synthesis of Bent shaped Liquid Crystals Containing Nitro as Terminal Group written by Pui Ling Yong and published by . This book was released on 2007 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Characterization of Smectic Liquid Crystals Formed by Bent Shaped Molecules written by Alexey B. Eremin and published by . This book was released on 2003 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystals written by Tommaso Bellini and published by Springer Science & Business Media. This book was released on 2012-01-21 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorinated Liquid Crystals: Design of Soft Nanostructures and Increased Complexity of Self-Assembly by Perfluorinated Segments, by Carsten Tschierske Liquid Crystalline Crown Ethers, by Martin Kaller and Sabine Laschat Star-Shaped Mesogens – Hekates: The Most Basic Star Structure with Three Branches, by Matthias Lehmann DNA-Based Soft Phases, by Tommaso Bellini, Roberto Cerbino and Giuliano Zanchetta Polar and Apolar Columnar Phases Made of Bent-Core Mesogens, by N. Vaupotič, D. Pociecha and E. Gorecka Spontaneous Achiral Symmetry Breaking in Liquid Crystalline Phases, by H. Takezoe Nanoparticles in Liquid Crystals and Liquid Crystalline Nanoparticles, by Oana Stamatoiu, Javad Mirzaei, Xiang Feng and Torsten Hegmann Stimuli-Responsive Photoluminescent Liquid Crystals, by Shogo Yamane, Kana Tanabe, Yoshimitsu Sagara and Takashi Kato
Download or read book Synthesis Bent Shaped Liquid Crystal Having Polymerizable Monomers written by Nur Atiqah binti Abdullah and published by . This book was released on 2010 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Bent Shaped Liquid Crystal Having Polymerizable Monomers written by Chuan Hong Tan and published by . This book was released on 2007 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Bent Shaped Liquid Crystals Having Azobenzene Mesogenics Cores written by Soon Gim Seong and published by . This book was released on 2008 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bent Core Liquid Crystals written by Irina Carlescu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bent-core (BC) molecules became an attractive liquid crystal class due to their potential use in smart displays and photonic devices. In contrast to calamitic mesogens, bent-shaped mesogens are self-organized superstructures with remarkable properties, given the presence of polar order in mesophases, although the molecules themselves are not chiral. A particular interest represents the biaxial nematic liquid crystal materials that are used in display technology and allow a faster switching response, compared to calamitic liquid crystals, with considerably reduced costs. This chapter briefly reviews the bent-core liquid crystals with three different core units in the structure: (1) 2,5-disubstituted oxadiazole, (2) 1,3-disubstituted benzene, and (3) 2,7-disubstituted naphthalene. To the central bent units (BUs) containing reactive functional groups of phenolic or aminic type, various mesogenic groups are symmetrically or asymmetrically connected, via esterification or condensation reactions. The obtained compounds showed biaxial nematic and/or smectic mesophases with high transition temperatures in the case of oxadiazole derivatives or cholesteric and banana-type mesophases with lower transition temperatures in the case of benzene and naphthalene derivatives.
Download or read book Synthesis and Charicterization of Bent Shaped Liquid Crystals Having Azobenzene Mesogenic written by Soon Pin Law and published by . This book was released on 2010 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Bent Shaped Liquid Crystals Having Schiff s Base Mesogenic Core written by Kah Yee Phoon and published by . This book was released on 2009 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unconventional Nematic Liquid Crystals written by Paladugu Sathyanarayana and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few years, bent-core liquid crystals have created immense interest in the scientific community because they show several new liquid crystalline phases along with some known phases of calamitic liquid crystals. Concomitantly efforts are made to synthesize liquid crystals with unconventional shapes like, V, W, T etc. Many physical properties of these new liquid crystals are not yet understood. This book is an attempt to understand the structure-property correlation of some unconventional nematic liquid crystals. We have presented some introduction and experimental techniques to measure various physical properties of those unconventional liquid crystals in the first two chapters. In the subsequent chapters we discuss physical properties of liquid crystal mixture of rod-like and bent-core molecules, pure bent-core molecules, hockey stick shaped (asymmetric bent-core) and T-shaped molecules. Finally we discuss flexoelectric properties in the last chapter.
Download or read book Handbook of Liquid Crystals Volume I written by Shri Singh and published by Springer Nature. This book was released on with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Crystal Filaments Formed by Bent Shaped Mesogens written by Alexandru Nemeş and published by . This book was released on 2008 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
