[PDF] Top 20 Room temperature bis-tolane liquid crystals

... Several room temperature bis-tolane liquid crystals were synthesized and their physical properties evaluated at elevated ...conjugated liquid crystals exhibit not ... See full document

... (1997) Room Temperature Difluoro-Tolane and Diphenyl-Diacetylene Liquid Crystals with Negative Dielectric Anisotropy, Molecular Crystals and Liquid Crystals Science ... See full document

... Table II lists the phase transition temperatures and heat fu- sion enthalpy of the ethyl-substituted fluoro and cyano bis- tolane compounds. Their melting and clearing points are both lower than the ... See full document

... melting temperature, and small heat fusion ...of bis- tolane LCs with wide nematic range, high Dn, low viscosity, and excellent compatibility with commercial cyano ... See full document

... viscosity. Temperature has a great influence on the LC device ...the temperature increases, birefringence, dielectric anisotropy, elastic constants and viscosity all decrease, but at different ... See full document

... 关DOI: 10.1063/1.1631064兴 In the past decade, submillimeter wave or terahertz 共THz兲 technology 1 has undergone remarkable growth with intense interests for their applications in time-domain far- infrared spectroscopy, 2,3 ... See full document

... 3e. This is because the lateral methyl group increases the molecular width, which, in turn, decreases the packing density of the liquid crystal molecules. As a result, the temperatures required to melt the ... See full document

... Table 4 summarizes the properties of the asymmetric dialkyl-substituted biphenyl tolanes 29–32. In this series an ethyl group was placed on the biphenyl ring and, on the other side, different alkyl chains were introduced ... See full document

... Free of waste disposing problem has made it an environmentally friendly scheme, and wide range potential applications could be ex- pected. Moreover, the significant advantage of this Mn thin film preparation process is ... See full document

... Pan,” Room temperature terahertz phase shifter based on magnetically controlled birefringence in liquid crystals,” ...of Liquid Crystals, 2nd ... See full document

... “Room temperature terahertz phase shifter based on magnetically controlled birefringence in liquid crystals,” ...tunable room-temperature 2 liquid crystal terahertz phase ... See full document

... tri-1-butylmethylammonium bis((trifluoromethyl)sulfonyl)imide ionic liquid mixed with a little propylene carbonate at 30 ...ionic liquid by dissolution of lithium ... See full document

... 2.4 Assembly of the LC cell Unlike our previous study of VAC biosensing of BSA where a cell is composed of two identical glass substrates (covered with the protein of the same concentration), 15 here each LC optical cell ... See full document

... ferroelectric liquid crystalline polymers [3, 4]. Glassy liquid crystals (GLCs) represent a unique class of LC materials that preserve the molecular order into solid state without crystallization ... See full document

... The devices were characterized by using a photoconductive-antenna-based THz time-domain spectrometer (THz-TDS) described previously [14]. A pair of parallel wire-grid polarizers (Specac, GS57204) was placed before and ... See full document

... and SHIN-TSON WU HRL Laboratories, 3011 Malibu Canyon Road, Malibu, CA 90265, USA (Received 31 May 1999; in Ž nal form 3 August 1999; accepted 31 August 1999) Methods for synthesizing bistolane liquid crystal ... See full document

... at room temperature. In order to study the material stability at room tempera- ture, unless specifically mentioned, we mixed 20% of the guest compound in a UV transparent nematic LC host ... See full document

... cation-based room temperature ionic liquids (RTILs) constitute an important class of ILs because of their unique electrochemical properties as well as non-aromatic nature of the ... See full document

... The phase transition temperatures, heat fusion enthalpy, re- fractive indices, and dielectric constants of several 4-fluoro alkyl PTTPs and PTPs are shown in Table 1.. From Table 1, the [r] ... See full document

... Comparing the thennal behavior of this series of fluorinated and difluorinated compounds with that of corresponding CPTP-nF and CPTPnFF compounds, confirms that incorporating a flexible [r] ... See full document