Category: 50670-76-3

Yoon, Dong Ki published the artcileLiquid-crystal periodic zigzags from geometrical and surface-anchoring-induced confinement: Origin and internal structure from mesoscopic scale to molecular level, SDS of cas: 50670-76-3, the publication is Physical Review E: Statistical, Nonlinear, and Soft Matter Physics (2010), 82(4-1), 041705/1-041705/6, database is CAplus and MEDLINE.

We figured out periodic undulations of lamellae “zigzags” in liquid crystals under confinement by glass and patterned silicon hybrid cell, but in the absence of applied fields. The optical and internal structures of zigzags have been investigated from mesoscopic scale to mol. level by convoluting real and reciprocal space probes, such as polarized light microscopy, SEM, and microbeam x-ray diffraction. The homeotropic anchoring happens at air/liquid crystal, while planar one appears at glass or patterned silicon surfaces. The wetting and displacement of lamellae near the glass surface give rise to tilting and bending in the stacking of lamellae. This can provide a solution for the origin of periodic zigzags: asym. strain exerted to lamellae at two-dimensional glass surface and one-dimensional-like pattern. This can give a hint for potential photonic applications such as optical gratings and modulators due to its high periodicity.

Physical Review E: Statistical, Nonlinear, and Soft Matter Physics published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H24S, SDS of cas: 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kim, Yun Ho published the artcileEnergy transfer in a π-conjugated liquid crystalline molecule with two chromophores of rigid biphenyl core and pyrene head moieties, HPLC of Formula: 50670-76-3, the publication is Journal of Nanoscience and Nanotechnology (2009), 9(12), 6968-6973, database is CAplus and MEDLINE.

We investigate the energy transfer of a highly ordered π-conjugated liquid crystalline mol. containing two chromophores of biphenyl and pyrene moiety, in which the mol. was prepared by esterification of fluorinated biphenyl compound and 1-pyrenebutanol. DSC, POM and XRD results show that this mol. forms a highly ordered smectic liquid crystalline mesophase, in which the π-conjugated mol. was strongly packed together over large-areas. We show that the liquid crystalline bi-chromophoric systems with highly ordered structure exhibit the energy hopping and transfer to the chromophore with the energetically lowest S₁ state. From the single-mol. spectroscopy of the biphenyl and pyrene chromophore in solution, we show an intramol. energy transfer from biphenyl to pyrene moieties. In solid thin film, highly ordered structure of the liquid crystal plays a significant role in the formation of the excimer and perfect energy transfer between the chromophores.

Journal of Nanoscience and Nanotechnology published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, HPLC of Formula: 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kim, Yun Ho published the artcileSelf-assembled periodic liquid crystal defects array for soft lithographic template, Computed Properties of 50670-76-3, the publication is Soft Matter (2010), 6(7), 1426-1431, database is CAplus.

We have developed highly periodic patterns with sub-micrometer features over large-areas using toric focal conic domains (TFCDs) originated from smectic liquid crystal (LC) as a new self-assembling building block. TFCDs are accomplished by precisely controlling the surface and interfacial properties of smectic LC. In order to apply the smectic liquid crystal defect arrays in soft lithog., the hexagonal arrays of domain patterns are used as molds for UV curable polymers, thereby providing LC defect stamps with high spatial resolution over large areas. Our method was further utilized to transfer patterns with sub-micrometer features from the polymer stamp surface to a secondary surface by microcontact printing (μ-CP). Accordingly, we show that such LC materials can be very strong candidates for the periodic templates, compared to other soft-building blocks such as block copolymers, colloids and surfactants. We anticipate our finding be a starting point for more sophisticated lithog. applications based on liquid crystalline materials.

Soft Matter published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Computed Properties of 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kim, Yun Ho published the artcileFabrication of a Superhydrophobic Surface from a Smectic Liquid-Crystal Defect Array, Category: esters-buliding-blocks, the publication is Advanced Functional Materials (2009), 19(18), 3008-3013, database is CAplus.

A novel fabrication method is developed for the preparation of superhydrophobic surfaces. The procedure uses focal conic structures of semi-fluorinated smectic liquid crystals (LCs) whose periodic toric focal conic domains (TFCDs) are prepared on a surface modified substrate. Reactive ion etching (RIE) on the periodic TFCD surface leads to a superhydrophobic surface with a water contact angle of ∼160° and a sliding angle of ∼2° for a 10 μL water droplet. The results show that this phenomenon is due to the development of a dual-scale surface roughness arising from the nanoscale protuberance caused by applying the RIE process to the top of the microscale TFCD arrays. The unique surface behavior is further verified by demonstrating that RIE on a flat lamellar liquid crystal film, in which the director is aligned parallel with surface, results in a relatively low hydrophobicity as compared to when periodic TFCDs are subjected to REI. The observations made in this publication suggest that a new approach exists for selecting potential candidates of superhydrophic surface formation based on spontaneous self-assembly in smectic liquid-crystalline materials.

Advanced Functional Materials published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Karanlik, Gurkan published the artcileThe analysis of temperature effect on frequency dependent dielectric parameters of semifluorinated liquid crystalline biphenyl carboxylic acid, COA of Formula: C15H14O3, the publication is Physica B: Condensed Matter (Amsterdam, Netherlands) (2019), 85-90, database is CAplus.

In this study, the dielec. properties of the liquid crystal 4-(7,7,8,8,9,9,10,10,10-nonafluorodecyloxy)biphenyl-4′-carboxylic acid (NBCA) exhibiting a Smectic C mesophase have been analyzed. NBCA has two critical temperatures which are 194°C for the crystal phase to the smectic phase transition, and 269°C for the smectic phase to the isotropic phase transition. Impedance spectroscopy measurements were made at regular intervals at different temperatures which includes these transitions. By using capacitance method, the complex dielec. constants have been calculated for each temperature, and the real part of dielec. constants have been fitted to the Cole-Cole equation. In addition, ac conductivity mechanisms of the NBCA at different temperatures and different phases and also activation energies which belongs to some selected frequencies have been determined by the imaginary part of dielec. constants

Physica B: Condensed Matter (Amsterdam, Netherlands) published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, COA of Formula: C15H14O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhou, Ting published the artcileSynthesis of 4′-alkoxy[1,1′-biphenyl]-4-carboxylic acid lipotripeptides, Application In Synthesis of 50670-76-3, the publication is Yaoxue Shijian Zazhi (2011), 29(1), 17-20, database is CAplus.

4′-Alkoxy[1,1′-biphenyl]-4-carboxylic acid lipotripeptide derivatives were designed as intermediates for the total synthesis of caspofungin-like cyclic lipopeptide antifungal agents. The synthesis of the target compounds was achieved (67.4-80.0%. overall yield) by a five-step sequence using as reactants N²-[(9H-fluoren-9-ylmethoxy)carbonyl]-N⁵-[(phenylmethoxy)carbonyl]-L-ornithyl-O-(1,1-dimethylethyl)-L-seryl-L-proline 1,1-dimethylethyl ester and N²-[(9H-fluoren-9-ylmethoxy)carbonyl]-N⁵-[(phenylmethoxy)carbonyl]-L-ornithyl-O-(1,1-dimethylethyl)-L-threonyl-L-proline 1,1-dimethylethyl ester and 4′-(alkoxy)[1,1′-biphenyl]-4-carboxylic acid 1H-benzotriazolyl esters and the products thus obtained were confirmed by ESI-MS and elemental anal.

Yaoxue Shijian Zazhi published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C7H6O3, Application In Synthesis of 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kutsumizu, Shoichi published the artcileSystematic exploitation of thermotropic bicontinuous cubic phase families from 1,2-bis(aryloyl)hydrazine-based molecules, Application In Synthesis of 50670-76-3, the publication is Physical Chemistry Chemical Physics (2018), 20(12), 7953-7961, database is CAplus and MEDLINE.

Rational design of mols. that exhibit a thermotropic bicontinuous cubic (Cub) phase has been earnestly desired. In this work, we describe the suitable selection of a mol. motif that has enabled the systematic exploitation of eight new series of Cub-phase mols. with sym. mol. cores, N-n (1), PB-n (2), S-n (3), and PEB-n (4), and unsym. cores, B-N-n (5), B-PB-n (6), B-S-n (7), and B-PEB-n (8). These eight series all originate from achiral chain-core-chain type rod-like mols. that exhibit two types of Cub phases, an achiral Ia3d phase, and a chiral phase. All the Ia3d phases formed were found to be isomorphous structures, with their cell dimensions being proportional to the core size, and the same was true for the latter chiral phase. We demonstrated that the formation is mainly governed by the segregation between core and alkyl moieties of the mols., and thus, by the weight fraction of the core portion f_core. This work also demonstrates that the central dicarbonylhydrazine linkage bearing intermol. hydrogen bonding ability exhibits a pinning effect that prevents slippage of π-stacks of mols., which is critical for the formation of the two Cub phases that are composed of chiral networks with twisted mol. arrangements. In each series, the emergence of spontaneous chirality formation that occurred in the chiral phase was limited to between 0.36 and 0.50 in the range of f_core. An interesting insight was that the introduced unsymmetry of the mol. core strongly influenced the phase behavior, which lowered the temperature range of Cub phases to around that of the smallest core series B-n, while the high temperature limit (T_c) was roughly proportional to the core size, as determined by the strength of intermol. π-π interactions.

Physical Chemistry Chemical Physics published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Application In Synthesis of 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Tao, Kang published the artcileSynthesis and characterization of a novel two-component organogelator based on ion-bonded discotic complex, COA of Formula: C15H14O3, the publication is Journal of Molecular Liquids (2008), 142(1-3), 118-123, database is CAplus.

A novel ion-bonded discotic complex was prepared from 2,3,6,7,10,11-hexakis(N,N-dimethylaminopropylaminocarbonylmethoxy)triphenylene (HDTP) and 4′-dodecyloxybiphenyl-4-carboxylic acid (DBC) by ionic self-assembly (ISA) route and characterized by Fourier transform IR (FTIR) spectrum. We found that the complex can self-assemble into stable gels in aromatic hydrocarbons. Nanofibers with diameters of 50-130 nm were observed in the gels by transmission electron micrograph (TEM). The FTIR data in conjunction with UV-vis and fluorescence spectra suggested that the aggregation of the complex into elongated fibers in solution was induced by a directional extended network of hydrogen bonds and π-π interactions. Based on the experiment anal., we proposed a tentative model of the self-assembly of this two-component gel-phase material.

Journal of Molecular Liquids published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C13H9FO2, COA of Formula: C15H14O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nakata, Yasukazu published the artcileA new type of main-chain liquid-crystal polymer derived from 4-hydroxybiphenyl-4-carboxylic acid and its smectic mesophase behavior, Quality Control of 50670-76-3, the publication is Journal of Materials Chemistry (1994), 4(11), 1699-703, database is CAplus.

A homologous series of polymers (PHBC-n) was prepared from 4′-hydroxybiphenyl-4-carboxylic acid and ω-bromoalkan-1-ols containing 5-9 CH₂ units which can serve as mesogen and flexible spacer groups, resp. The PHBC-n polymers are characterized by having 2 different linkage groups, ether and ester groups, to connect the biphenyl mesogen to the methylene spacer, and are considered to be a new type of main-chain liquid-crystal polymer. All polymers exhibit the enantiotropic smectic phase. The smectic behavior and structure were examined by differential scanning calorimetry, optical microscopic and x-ray diffraction methods, and are discussed in comparison with the corresponding data of the BB-n polyesters, which include only the ester linkage group.

Journal of Materials Chemistry published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Quality Control of 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hattori, Hideshi published the artcileSynthesis and characterization of polymerizable photochromic liquid crystals containing a spiro-oxazine group, Category: esters-buliding-blocks, the publication is Liquid Crystals (1999), 26(7), 1085-1095, database is CAplus.

Novel polymerizable photochromic liquid crystal materials containing either the 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-[3H]naphth[2,1-b][1,4]oxazine] group or the 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-[3H]pyrido[3,2-f][1,4]benzoxazine] group as the photochromic moiety, and the biphenylene unit as the mesogenic moiety, were synthesized. Thermal and phys. properties of the compounds were examined using DSC, optical polarizing microscopy, wide-angle x-ray diffractometry and UV-visible spectrophotometry. The photochromic compounds containing both photochromic and mesogenic moieties showed metastable mesophases; these tended to crystallize with time and on heating. The crystallization behaviors were strongly dependent on the structure of the terminal group of alkylene spacer and the position of the spiro-oxazine bound to the mesogen.

Liquid Crystals published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics