- New ionic liquid crystals based on imidazolium salts
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The new ionic liquid crystal 1-(4-dodecyloxybenzyl)-3-methyl-1H-imidazol-3- ium bromide has been synthesized and its X-ray structure obtained; various salts containing BF4-, SCN-, PF6 -, CF3/sub
- Dobbs, William,Douce, Laurent,Allouche, Lionel,Louati, Alain,Malbosc, Francois,Welter, Richard
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Read Online
- Microenvironment response type cross-linked quaternary ammonium salt micelle antibacterial agent and preparation method and application thereof
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The invention discloses a microenvironment response type cross-linked quaternary ammonium salt micelle antibacterial agent and a preparation method and application thereof, and belongs to the field ofbiomedical materials. Crosslinked micelles can well pen
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Paragraph 0029; 0031; 0043; 0048
(2019/05/23)
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- Nanoparticles and nanoparticle compositions
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The invention provides multivalent surface-crosslinked micelle (SCM) particles, crosslinked reverse micelle (CRM) particles, and methods of making and using them. The SCM particles can be used, for example, to inhibit a virus or bacteria from binding to a host cell. The inhibition can be used in therapy for the flu, cancer, or AIDS. The CRM particles can be used, for example, to prepare metal nanoparticles or metal alloy nanoparticles, or they can be used in catalytic reactions.
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Page/Page column 44; 45
(2016/06/01)
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- Luminescent columnar liquid crystals based on 1,3,4-oxadiazole
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In this study five new compounds, derivatives of 1,3,4-oxadiazole, were synthesized in order to achieve mesomorphic behavior and luminescence. Different types of aliphatic chains were used in order to investigate the influence of alkoxide groups in mesomorphic behavior. All of the compounds showed high thermal stability and strong blue photoluminescence in solution and in solid films. Furthermore, compounds 10a-d presented hexagonal columnar mesomorphism, which was characterized by polarizing optical microscopy and X-ray diffraction, and strong π-stacking was observed. Notably, for two compounds (10c,d), the liquid crystal properties were preserved on cooling from the isotropic state to room temperature. These characteristics make these materials good candidates for application in organic electronics.
- Girotto, Edivandro,Eccher, Juliana,Vieira, André A.,Bechtold, Ivan H.,Gallardo, Hugo
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supporting information
p. 3355 - 3360
(2014/05/06)
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- NANOPARTICLES AND NANOPARTICLE COMPOSITIONS
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The invention provides multivalent surface-crosslinked micelle (SCM) particles, crosslinked reverse micelle (CRM) particles, and methods of making and using them. The SCM particles can be used, for example, to inhibit a virus or bacteria from binding to a host cell. The inhibition can be used in therapy for the flu, cancer, or AIDS. The CRM particles can be used, for example, to prepare metal nanoparticles or metal alloy nanoparticles, or they can be used in catalytic reactions.
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Paragraph 0195; 0196
(2013/05/08)
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- Artificial light-harvesting system based on multifunctional surface-cross-linked micelles
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A good harvest: Two self-assembling strategies (micellization and electrostatic attraction) and covalent capture were employed to construct a robust, inexpensive, efficient artificial light-harvesting system (see picture). The synthesis was achieved by a one-pot reaction. A high density of the antenna chromophores was achieved without self-quenching and excimer formation, thus affording extremely efficient energy transfer. Copyright
- Peng, Hui-Qing,Chen, Yu-Zhe,Zhao, Yan,Yang, Qing-Zheng,Wu, Li-Zhu,Tung, Chen-Ho,Zhang, Li-Ping,Tong, Qing-Xiao
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supporting information; scheme or table
p. 2088 - 2092
(2012/04/18)
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- New achiral phenylacetylene monomers having an oligosiloxanyl group most suitable for helix-sense-selective polymerization and for obtaining good optical resolution membrane materials
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To develop new phenylacetylene monomers more suitable for helix-sense-selective polymerization (HSSP) we reported previously and to improve the efficiency of the HSSP and membrane performance of the resulting polymers, novel phenylacetylenes having a flexible oligosiloxanyl group (SnBDHPA)together with the other related three series of monomers were synthesized and polymerized by using a chiral catalytic system and enantioselectivity in permeation of the membranes from the resulting chiral polymers were examined. SnBDHPA was the most suitable for the HSSP and the CD absorptions (G values) of poly- (SnBDHPA) were stronger and more stable than those of the corresponding polymers having rigid alkyl groups. The polymers could be fabricated to flexible self-supporting membranes by using solvent-casting method. In addition, enantioselectivity in permeation of one of poly(SnBDHPA) membranes was much higher than that of a poly(phenylacetylene) membrane having alkyl groups. This was because the polymers having oligosiloxane groups had high regularity of structures, i.e., chemical structures of the macromolecules such as one handedness and high order structures such as columnar contents in the membranes, and the membranes were flexible and had almost no defects. These good properties as optical resolution membrane materials were caused by flexibility, hydrophobicity, and bulkiness of the oligosiloxane chains. S3BDHPA having a trisiloxanyl group was found to be the best monomer for the HSSP and for obtaining good optical resolution membrane materials.
- Liu, Lijia,Zang, Yu,Hadano, Shingo,Aoki, Toshiki,Teraguchi, Masahiro,Kaneko, Takashi,Namikoshi, Takeshi
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p. 9268 - 9276
(2011/11/14)
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- Synthesis and helix-sense-selective polymerization of a novel phenylacetylene having a trisiloxanyl group and two hydroxyl groups and enantioselective permeability of the resulting chiral polymeric membrane: Effect of the trisiloxanyl group on the polymerization and enantioselective permeability
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To develop a new phenylacetylene monomer suitable for helix-sense-selective polymerization (HSSP) we reported previously and to improve the efficiency of the HSSP and membrane performance of the resulting polymer, a novel phenylacetylene having a trisiloxanyl group (S3BDHPA) was synthesized and polymerized by using a chiral catalytic system and enantioselectivity in permeation of its membrane was examined. S3BDHPA was suitable for the HSSP and the CD absorption of poly(S3BDHPA) was stronger and more stable than that of the corresponding polymer having no siloxanyl groups. In addition, enantioselectivity in permeation of poly(S3BDHPA) was much higher than that of a polymer membrane having no siloxanyl groups. They are thought to be caused by the flexibility and hydrophobicity of the trisiloxane groups.
- Liu, Lijia,Oniyama, Yoshiyuki,Zang, Yu,Hadano, Shingo,Aoki, Toshiki,Teraguchi, Masahiro,Kaneko, Takashi,Namikoshi, Takeshi,Marwanta, Edy
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experimental part
p. 2460 - 2464
(2011/11/12)
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- 1-(4-Alkyloxybenzyl)-3-methyl-1H-imidazol-3-ium organic backbone: A versatile smectogenic moiety
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The merger of ionic liquid and liquid crystal fields, obtained by using the imidazolium ring as a common element, has allowed us to tailor a new set of materials which associate specific functionalities. These functionalities are consequences of the origi
- Dobbs, William,Douce, Laurent,Heinrich, Benoit
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experimental part
(2010/04/22)
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- Synthesis of oligo(ethylene glycol) toward 44-mer
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A synthetic method for oligo(ethylene glycol) toward 44-mer (FW = 1956.35) is described. Reiteration of Williamson's ether synthesis and hydrogenation to remove protecting benzyl group affords desired oligo(ethylene glycol) toward 44-mer in moderate yields. The advantages in this method are use of commercially easily available materials as starting materials and procedures avoiding difficulty in purification of the products as much as possible.
- Ahmed, Saleh A.,Tanaka, Mutsuo
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p. 9884 - 9886
(2007/10/03)
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- Positional and charged effects of heterocyclic N atoms on mesogenic properties of stilbazoles and analogous N-oxides
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The synthesis and the phase behavior of stilbazoles and corresponding N-oxides containing different positions of heterocyclic N atoms, i.e. trans-2′-, 3′-, 4′- stilbazoles and their N-oxides, are reported. Their phase transition temperatures and the mesog
- Lin, Hong-Cheu,Lai, Long-Li,Lin, Yu-Sheng,Tsai, Chiitang,Chen, Rong-Chi
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- Bent tridentate receptors in calamitic mesophases with predetermined photophysical properties: New luminescent lanthanide-containing materials
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A new synthetic strategy has been developed to introduce bent and rigid tridentate 2,6-bis(benzimidazol-2'-yl)pyridine cores into rodlike ligands L(11-17). The crystal structure of the nonmesogenic ligand L13 (C39H37N5O4, triclinic, P1, Z = 2) shows the expected trans-trans conformation of the tridentate binding unit, which provides a linear arrangement of the semirigid aromatic sidearms. The crystal structure of the related mesogenic ligand L16 (C61H81N5O4, triclinic, P1, Z = 2) demonstrates the fully extended conformation adopted by the lipophilic side chains, leading to a slightly helically twisted I-shaped molecule. A rich and varied mesomorphism results which can be combined with the simultaneous tuning of electronic and photophysical properties via a judicious choice of the spacers between the rigid central core and the semirigid lipophilic sidearms. Ligands L13,14 react with Ln(NO3)3·χH2O to give quantitatively and selectively the neutral 1:1 complexes [Ln(L')(NO3)3] (Ln = La to Lu), which are stable in the solid state at room temperature but partially dissociate in acetonitrile to give the cationic species [Ln(L')(NO3)2]+. The crystal structure of [Lu-(L13)(NO3)3]·3CH3CN (30, LUC45H46N11O13, monoclinic, C2/c, Z = 8) reveals a U-shaped arrangement of the ligand strand arising from the cis-cis conformation of the coordinated tridentate binding unit. This drastic geometric change strongly affects the thermal behavior and the photophysical and electronic properties of the lipophilic complexes [Ln(L14)(NO3)3]. Particular attention has been focused on structure-properties relationships, which can be modulated by the size of the lanthanide metal ions.
- Nozary, Homayoun,Piguet, Claude,Tissot, Paul,Bernardinelli, Gérald,Bünzli, Jean-Claude G.,Deschenaux, Robert,Guillon, Daniel
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p. 12274 - 12288
(2007/10/03)
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