Novel biphenyl-substituted 1,2,4-oxadiazole ferroelectric liquid crystals: synthesis and characterization

• Mahabaleshwara Subrao,
• Dakshina Murthy Potukuchi,
• Girish Sharada Ramachandra,
• Poornima Bhagavath,
• Sangeetha G. Bhat and
• Srinivasulu Maddasani

Beilstein J. Org. Chem. 2015, 11, 233–241, doi:10.3762/bjoc.11.26

• ; SmC* phase; spontaneous polarization; Suzuki coupling; Introduction The 1,2,4-oxadiazole derivatives are prevalently reported compounds with promising biological [1][2][3][4][5] and physiological [6][7][8] activity such as antiinflammatory, antibacterial, antimicrobial, antifungal, anticancer

• ] spontaneous polarization due to the reduced symmetry of C2v caused by molecular polarity and thus make the phase as a polar phase. Thus, an oxadiazole derivative with a chiral center is tantamount to exhibit FE properties. In order to explore these materials in devices, it is necessary that they have a low

Thermotropic and lyotropic behaviour of new liquid-crystalline materials with different hydrophilic groups: synthesis and mesomorphic properties

• Alexej Bubnov,
• Miroslav Kašpar,
• Věra Hamplová,
• Ute Dawin and
• Frank Giesselmann

Beilstein J. Org. Chem. 2013, 9, 425–436, doi:10.3762/bjoc.9.45

• been clearly detected in the SmC* phase but due to the monotropic (supercooled) character of the phase it was not possible to measure and study the spontaneous quantities in detail, namely the spontaneous polarization and tilt angle. For this compound the microphotographs of textures obtained in POM

Laterally substituted symmetric and nonsymmetric salicylideneimine-based bent-core mesogens

• Sonja Findeisen-Tandel,
• Wolfgang Weissflog,
• Ute Baumeister,
• Gerhard Pelzl,
• H. N. Shreenivasa Murthy and
• Channabasaveshwar V. Yelamaggad

Beilstein J. Org. Chem. 2012, 8, 129–154, doi:10.3762/bjoc.8.15

• . The arrangement of the molecular long axes in two adjacent layers is sketched below the textures in Figure 3. This behaviour was found for all compounds OH 1a–c. The values of the spontaneous polarization are given in Table 1. The switching behaviour of the compound H 1a without the hydroxy group is

• anticlinic antiferroelectric (SmCaPA) and the synclinic ferroelectric (SmCsPF) states. The value of the spontaneous polarization was calculated from the area under the repolarization peaks to be 660 nC/cm2. The switching behaviour of OH 2a is representative for all compounds OH 2a–j. The PS values are given

• plausible interpretation of the data is given in Supporting Information File 1, Figure S2. The designation as a polar phase results from electro-optical investigations. Two repolarization peaks per half period of an applied triangular wave voltage are generated (Figure 15a). The spontaneous polarization

Novel banana-discotic hybrid architectures

• Hari Krishna Bisoyi,
• H. T. Srinivasa and
• Sandeep Kumar

Beilstein J. Org. Chem. 2009, 5, No. 52, doi:10.3762/bjoc.5.52

• organization into layers. Since the molecules are closely packed within the smectic layers and additionally, the rotation about their long axes is strongly hindered, the bent directions align parallel in each layer. As a result of this directed organization, each layer develops a spontaneous polarization. On