752253-67-1Relevant academic research and scientific papers
Synthesis, mesomorphism, photophysics and device performance of liquid-crystalline pincer complexes of gold(iii)
Parker, Rachel R.,Liu, Denghui,Yu, Xiankang,Whitwood, Adrian C.,Zhu, Weiguo,Williams,Wang, Yafei,Lynam, Jason M.,Bruce, Duncan W.
, p. 1287 - 1302 (2021/02/12)
Emissive gold(iii) complexes of pincer 2,6-diphenylpyridines also bearing a phenylacetylide ligand have been modified at both the pincer and phenylacetylide to confer liquid crystalline properties, with most complexes showing a columnar hexagonal phase in
Synthesis and characterization of α-cyanostilbene-based bent-core hexacatenar mesogens with different central groups
Jiang, Zonglin,Li, Nana,Liu, Xiaotong,Pang, Yida,Xiao, Yulong,Zuo, Rongzhou
supporting information, (2021/08/23)
Two series of bent-core hexacatenars containing a diphenyl ketone/diphenylmethylene malononitrile as central group and two α-cyanostilbene units as molecular arm were synthesized by Suzuki coupling and Knoevenagel reactions. The effect of the central groups on the liquid crystalline and photophysical behaviors was investigated in detail. POM, DSC and XRD results indicated that all the compounds could self-assemble into hexagonal columnar mesophases and diphenylmethylene malononitrile-based hexacatenars show much wider range of mesophase. The introduction of malononitrile unit into aromatic core could induce more distinct solvatochromic effect. Both series of hexacatenars show aggregation-induced emission enhancement (AIEE) behaviors and the fluorescence intensity is affected by the size of spherical aggregates in the aggregated state. Additionally, the maximum emission bands, fluorescence intensity and fluorescence color in condensed state showed obvious transition upon rising temperature.
Effect of the linkages on the self-assembly and photophysical properties of 4,7-diphenyl-2,1,3-benzothiadiazole-based luminescent polycatenars
Hu, Jinliang,Xiao, Yulong,Chang, Qing,Gao, Hongfei,Cheng, Xiaohong
, (2019/05/10)
Three series of 4,7-diphenyl-2,1,3-benzothiadiazole (DBTD)based polycatenars containing a central 4,7-diphenyl-2,1,3-benzothiadiazole moiety connected to 3,4,5-trialkoxyl benzene units at both ends through ether (-OCH2-), ester (-OOC-)or amide (-HNCO-)linkages were synthesized via Suzuki coupling reaction as key step. The polarities of the linkages had great effect on their self-assembly and photophycial properties. Both ether and amide compounds were mesogens, while the ester compounds were non-mesogens. The ether compounds displayed Colhex/p6mm phases, while the amide compound displayed two kinds of columnar phases i.e. columnar rectangular phase with p2mm and columnar hexagonal phase with p6mm lattices depending on temperature. The column phases could be aligned in electric field or under mechanical shearing. The ether and amide compounds showed the significant red-shifted maximum absorption and emission. In the solid and gel states, both ether and amide compounds were yellow luminescence, while ester compounds were green luminescence.
Wide-Range Columnar and Lamellar Photoluminescent Liquid-Crystalline Lanthanide Complexes with Mesogenic 4-Pyridone Derivatives
Chiriac, Laura F.,Pasuk, Iuliana,Secu, Mihail,Micutz, Marin,C?rcu, Viorel
, p. 13512 - 13522 (2018/09/06)
A series of liquid crystals with various lanthanide ions (EuIII, SmIII, and TbIII) was designed and prepared starting from the corresponding lanthanide nitrates and N-alkylated 4-pyridone derivatives bearing mesogenic 3,4,
s-Triazine-Based Functional Discotic Liquid Crystals: Synthesis, Mesomorphism and Photoluminescence
Veerabhadraswamy, B. N.,Dambal, Hashambi K.,Rao, D. S. Shankar,Yelamaggad, C. V.
, p. 2225 - 2237 (2016/08/27)
A new series of C3-symmetric, π-conjugated molecules was designed, synthesized and characterized. The materials were derived from electron-accepting s-triazine, appended covalently to electron-donating styrylbenzene arms, and were readily prepared in excellent yield with high purity by means of three-fold condensation of triphosphonate with n-alkoxybenzaldehydes under Horner–Wadsworth–Emmons reaction conditions. Examination of the phase transitional properties by several complementary techniques evidenced self-assembly into a hexagonal columnar phase, occurring over wide and reasonable thermal ranges. The photophysical properties were studied both in solution and in the fluid/frozen columnar states by UV/Vis absorption and photoluminescence spectroscopy. The emission spectra obtained as a function of the temperature rule out the breaking-up of larger columns and a non-radiative, thermally activated process. A study carried out on thin films of the glassy columnar state, which accounts for conserved fluorescence, defect-free orientation, and freezing ionic species, with the help of atomic force microscopy (AFM) images, suggested a homogeneous granular morphology comprising fibrillar structures. Dissimilarities in the surface morphology and birefringence of thin films of the solid and frozen columnar states were clearly shown by Raman spectroscopy. An electrochemical investigation revealed a LUMO energy of ?4.0 eV. Thus, the discotic motifs presented herein meet certain criteria of organic materials, which are essential for developing electronic devices.
Liquid crystalline 2-thienyl-4,6-diamino-1,3,5-triazines exhibiting Im3m and Pm3n micellar cubic phases in an inverted sequence
Dai, Heng,Yang, Xueyan,Tan, Xiaoping,Su, Fawu,Cheng, Xiaohong,Liu, Feng,Tschierske, Carsten
, p. 10617 - 10619 (2013/11/06)
Two micellar cubic phases with different structures were observed for the first time in the order Im3m-Pm3n in a thermotropic phase sequence of 4,6-diaminotriazine terminated rod-like liquid crystals upon increasing alkyl chain length or rising temperatur
Induction of thermotropic bicontinuous cubic phases in liquid-crystalline ammonium and phosphonium salts
Ichikawa, Takahiro,Yoshio, Masafumi,Hamasaki, Atsushi,Taguchi, Satomi,Liu, Feng,Zeng, Xiang-Bing,Ungar, Goran,Ohno, Hiroyuki,Kato, Takashi
, p. 2634 - 2643 (2012/03/22)
Two series of wedge-shaped onium salts, one ammonium and the other phosphonium, having 3,4,5-tris(alkyloxy)benzyl moieties, exhibit thermotropic bicontinuous "gyroid" cubic (Cubbi) and hexagonal columnar liquid-crystalline (LC) phases by nanose
Room temperature liquid porphyrins
Maruyama, Sumio,Sato, Kenta,Iwahashi, Hiroyuki
, p. 714 - 716 (2011/01/09)
The syntheses of 5,10,15,20-tetrakis(3,4,5-trialkoxyphenyl)porphyrins, which exhibit fluid state behavior at room temperature, are reported. The thermal and rheological measurements indicate that they behave like liquid at 25 °C (298 K).
LIQUID PORPHYRIN DERIVATIVE AND METHOD FOR PRODUCING THE SAME
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Page/Page column 21, (2010/12/17)
The present invention is to provide a liquid porphyrin derivative at 25 °C and at temperatures from 26 to 40 °C, and a method for producing the same. The liquid porphyrin derivative of the present invention is represented by the following formula (1): whe
Tuning the polarity of hierarchically assembled helicates
Baumert, Miriam,Albrecht, Markus,Winkler, Henrik D. F.,Schalley, Christoph A.
experimental part, p. 953 - 958 (2010/06/11)
Catechol ligands bearing ester groups in 3-position (1a,b, 2) are building blocks for the formation of triply lithium-bridged dinuclear helicate-type complexes [Li1a,b,2)i-. Attachment of appropriate functionalities at the ester unit allows the fine tuning of the polarity of the compounds to afford solubility in highly nonpolar as well as highly polar solvents. The investigations show that the internal dinuclear core is stable in a broad variety of solvents, even in water. Georg Thieme Verlag Stuttgart ? New York.
