Synthesis of imidazolium salt-terminated poly(amidoamine)-typed POSS-core dendrimers and their solution and bulk properties

Naka, Kensuke; Shinke, Ryusuke; Yamada, Maki; Belkada, Fadila Djouadi; Aijo, Yoko; Irie, Y.; Shankar, Sonu Ram; Smaran, Kumar Sai; Matsumi, Noriyoshi; Tomita, Shogo; Sakurai, Shinichi

doi:10.1038/pj.2013.60

Cited by 22 publications

(22 citation statements)

References 41 publications

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“…147,148,149,150,151,152,153,154,155,156,157,158,159,160 Based on the range of molecular masses involved, these compounds can be regarded as OIL compounds. Their molecular weight depends on the length of the spacer and the type of the ionic group and starts from 1338 g/mol for derivatives with one arm 147 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 temperature of 172°C.…”

Section: Star Poly-and Oligo(ionic Liquid) Materialsmentioning

confidence: 99%

“…Controlled branching of side groups leads to POSS-IL with dendritic structures 159. Among them, the most explored are aprotic cationic POSS-IL, whereas the literature on protic POSS-IL of this structure is absent to the best of our knowledge.…”

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confidence: 99%

“…to 3448 g/mol in star POSS with eight arms150 and usually does not exceed 10000 (9940) g/mol for secondgeneration POSS-dendrimers 159. Controlled branching of side groups leads to POSS-IL with dendritic structures 159.…”

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confidence: 99%

“…The positive effect of a branched macromolecular architecture on ionic conductivity was confirmed for PEG-based molecules by observing higher ionic conductivity of star and hyperbranched polymers as compared to their linear analogs.202 , 203 These unique properties of branched poly(ionic liquid)s and oligo(ionic liquid)s make this family of macromolecules a promising candidate, in a combination with other nanoparticles, for use in optoelectronic devices, as anhydrous ion-conducting electrolytes for various electrochemical devices, in separation processes, for components encapsulation and dispersion, for interface-controlled catalysis, and for nanoreactors for nanoparticle preparation.Because frequently exploited functionalized POSS-cores with IL groups are capable of controlled self-organization, they can be promising candidates for the ion conductive materials. Such POSS-based dendrimers were synthesized with PF 6 -and TFSI-anions as well and are the first examples of imidazolium salt-terminated POSS-based dendrimers 159. The reaction of octasilane POSS with N,N-dimethylallylamine yields a…”

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confidence: 99%

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Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Ledin

Shevchenko

et al. 2015

ACS Appl. Mater. Interfaces

132

101

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Branched polyelectrolytes with cylindrical brush, dendritic, hyperbranched, grafted, and star architectures bearing ionizable functional groups possess complex and unique assembly behavior in solution at surfaces and interfaces as compared to their linear counterparts. This review summarizes the recent developments in the introduction of various architectures and understanding of the assembly behavior of branched polyelectrolytes with a focus on functional polyelectrolytes and poly(ionic liquid)s with responsive properties. The branched polyelectrolytes and poly(ionic liquid)s interact electrostatically with small molecules, linear polyelectrolytes, or other branched polyelectrolytes to form assemblies of hybrid nanoparticles, multilayer thin films, responsive microcapsules, and ion-conductive membranes. The branched structures lead to unconventional assemblies and complex hierarchical structures with responsive properties as summarized in this review. Finally, we discuss prospectives for emerging applications of branched polyelectrolytes and poly(ionic liquid)s for energy harvesting and storage, controlled delivery, chemical microreactors, adaptive surfaces, and ion-exchange membranes.

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Section: Star Poly-and Oligo(ionic Liquid) Materialsmentioning

confidence: 99%

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confidence: 99%

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Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Ledin

Shevchenko

et al. 2015

ACS Appl. Mater. Interfaces

132

101

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“…A wide variety of polyhedral oligomeric silsesquioxane (POSS)-based functional materials have been developed using ionic species. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] We recently reported the synthesis of POSS-based ILs, and we investigated their thermal properties. 25,26 By tethering multiple ion pairs composed of imidazolium cations and carboxylates to the vertices of POSS cores or by simply adding POSS molecules with acid groups, the melting temperatures of the ion pairs decreased and their thermal stabilities increased.…”

Section: Introductionmentioning

confidence: 99%

POSS ionic liquid crystals

et al. 2015

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Here we report the use of unique organic − inorganic hybrid materials composed of octa-substituted polyhedral oligomeric silsesquioxane (POSS) cores as ionic liquid (IL) crystals. These materials have a wide temperature range in which they exist in liquid crystal (LC) phase because of the stabilizing effect of the POSS core. We synthesized ion pairs composed of alkyl chainsubstituted imidazolium and carboxylates of various lengths that were or were not connected to the POSS core; then the thermal properties of these materials were investigated. It was found that both ion salts and the octadecyl-substituted imidazolium ion pairs with or without connection to POSS could form LCs. Interestingly, the LC phase of the POSS-tethered ion salts was maintained until decomposition. In contrast, the octadecyl-substituted imidazolium ion salts that were not tethered to the POSS core showed a clearance point during heating. The highly symmetric structure of POSS contributes not only to the suppression of the molecular motion of the ion salts, but also results in the formation of regular structures, leading to thermally stable, thermotropic IL crystals. In addition, by using electrostatic interactions originating among ionic moieties, robust chiral structures can be produced. 3,4 Even a small quantity of chiral ionic sources can efficiently induce enantiomeric structures in a bulk sample, and ionic moieties can be assembled to form regularly ordered structures. 5,6 These well-ordered ionic moieties are expected to work as efficient cation carriers and scaffolds for ordering cations. These materials, which comprise closely assembled ionic species, can exhibit interesting optical and magnetic properties. Thus, new molecular designs for preparing thermally stable LCs composed of ionic species are needed to produce advanced functional materials.The concept of supported IL phases (SILPs) has been recently proposed. Several materials based on SILPs have exhibited important characteristics such as high ion conductivity and compatibility with organic reaction media; these materials have been used as templates for the formation of nanostructures. 1 Silica supports improve the thermal stability of LCs. 7,8 Carmichael et al. 9 have synthesized and explored silicon wafer-assisted SILP materials. They created layers with thicknesses between 10 and 21 nm of an ionic LC with [C 18 C 1 Im] [PF 6 ] on the planar wafer surface and found that the ionic LC formed a mesophase. Inspired by their work, Wasserscheid et al. 7 fabricated SILP materials using silicon nanoparticles and used them as supports for preparing mesoporous structures that could act as effective gasphase catalysts. 8 To construct advanced materials based on the concept of SILP materials, their properties must be fine-tuned according to preprogramed designs at the molecular level. A wide variety of

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Synthesis of single component element‐block materials based on siloxane‐based cage frameworks

Naka

Irie

2016

Polymer International

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This mini-review focuses on recent efforts to prepare single component element-block materials based on siloxane-based cage frameworks, a promising approach to control the sequence of organic and inorganic segments in organic-inorganic hybrids at the molecular level. Polyhedral octasilsesquioxanes, denoted (RSiO 1.5 ) 8 or labeled T 8 cages, and octadimethylsiloxy-Q 8 cages, denoted (RSiMe 2 OSiO 1.5 ) 8 , are used here as siloxane-based cage frameworks. Thermoplastic optically transparent silsesquioxane materials derived from a single cage compound can be obtained with dumbbell-and star-shaped cage structures, allowing precise design of their structures for tuning properties. The siloxane-based cage core dendrimers are ideal candidates for single component element-block materials which possess three-dimensional, well-defined molecular level structures. Their rigid and cubic inorganic frameworks provide unique features for siloxane-based cage core dendrimers. These topics attract attention in both academia and industry.

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Synthesis of imidazolium salt-terminated poly(amidoamine)-typed POSS-core dendrimers and their solution and bulk properties

Cited by 22 publications

References 41 publications

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

Architecture, Assembly, and Emerging Applications of Branched Functional Polyelectrolytes and Poly(ionic liquid)s

POSS ionic liquid crystals

Synthesis of single component element‐block materials based on siloxane‐based cage frameworks

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