New Polymeric Materials Based on Element-Blocks

Chujo, Yoshiki; Tanaka, Kazuo

doi:10.1246/bcsj.20150081

Cited by 326 publications

(166 citation statements)

References 44 publications

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“…In addition, we recently suggested a new concept of organicinorganic hybrid materials named 'element-block' materials. 20 As some the examples, we demonstrate boron compounds and POSS materials here. By using boron compounds as one of functional units of element-blocks, the resulting materials showed unique properties, such as high electron transportation 21,22 and near-infrared (NIR) luminescence, 2325 aggregation-induced emission (AIE) 2639 and crystallization-induced emission (CIE) 28,4043 properties.…”

Section: Introductionmentioning

confidence: 95%

Creative Synthesis of Organic–Inorganic Molecular Hybrid Materials

Gon

Tanaka

Chujo

2017

Bulletin of the Chemical Society of Japan

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This manuscript describes a series of our research based on the concept of an organicinorganic molecular hybrid material. Homogeneous organicinorganic hybridization is accomplished by mixing organic components and inorganic ones at a molecular level. Based on the strategy, a great number of hybrid materials have been synthesized and brand-new properties have been developed. Organicinorganic hybrid materials insure the realization of the collaboration of organic features and inorganic features. We recently suggested a new concept of organic inorganic hybrid materials named 'element-blocks'. This concept provides the idea that an element-level design and combinations of the functional units can create innovative materials. Herein, we demonstrate synthetic methods and examples of the organicinorganic hybrid materials, and we introduce our recent work based on the concept of element-blocks.

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Section: Introductionmentioning

confidence: 95%

Creative Synthesis of Organic–Inorganic Molecular Hybrid Materials

Gon

Tanaka

Chujo

2017

Bulletin of the Chemical Society of Japan

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“…22 The tetrasilaplatinacycles 2a and 2b release the tetramers 3a and 3b upon addition of excess silafluorene. The X-ray crystallographic and NMR spectroscopic results of the products revealed π-stacking interaction between the biphenylene groups in the solid state and in solution.…”

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confidence: 99%

Tetramer and Polymer of 2,7-Dialkoxy-9H-9-silafluorene Composed of Si Backbone and π-Stacked Biphenylene Groups

et al. 2016

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9H-9-Silafluorene with two alkoxy groups underwent dehydrocoupling in the presence of [Pt(dmpe) 2 ] (dmpe: 1,2-bis(dimethylphosphino)ethane) to produce tetrasilaplatinacyclopentanes having four silafluorenylene units. Ligand exchange of the persilylated platinacycles with non-substituted silafluorene released tetrasilane dihydrides with two pairs of π-stacked biphenylene units. [Ni(dmpe) 2 ] catalyzes the dehydrogenative polycondensation of 2,7-dibutoxy-9H-9-silafluorene to produce the poly(1,1-silafluorene).

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“…Fujii et al [28,29] have synthesized novel for sterically stabilized polypyrrole-palladium (PPy-Pd) nanocomposite particles. Such a characteristic particle containing heavy element has recently been attracting intensively general interests of researchers in many fields under the name of element-blocks [30]. Figure 17 shows a TEM image of these particles with a schematic of the structure.…”

Section: Spherical Casementioning

confidence: 99%

SAXS Evaluation of Size Distribution for Nanoparticles

Sakurai¹

2017

X-Ray Scattering

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Size distribution is an important structural aspect in order to rationalize relationship between structure and property of materials utilizing polydisperse nanoparticles. One may come to mind the use of dynamic light scattering (DLS) for the characterization of the size distribution of particles. However, only solution samples can be analyzed and even for those, the solution should be transparent or translucent because of using visible light. It is needless to say that solid samples are out of range. Furthermore, the size distribution only in the range of several tens of nanometers can be characterized, so DLS is useless for particles in the range of several nanometers. Therefore, the small-angle X-ray scattering (SAXS) technique is much superior when considering the determination of the size distribution in several nanometers length scale for opaque solutions and for solid specimens. Furthermore, the SAXS technique is applicable not only for the spherical particle but also for platelet (lamellar) and rod-like (cylindrical) particles. In this chapter, we focus on the form factor of a variety of nanostructures (spheres, prolates, core-shell spheres, core-shell cylinders and lamellae). Also getting started with a monodisperse distribution of the size of the nanostructure, to unimodal distribution with a narrow standard deviation or wide-spreading distribution and finally to the discrete distribution can be evaluated by the computational parameter fitting to the experimentally obtained SAXS profile. In particular, for systems forming complicated aggregations, this methodology is useful. Not only the size distribution of 'a bunch of grapes' but also the size distribution of all 'grains of grapes in the bunch' can be evaluated according to this methodology. This is very much contrasted to the case of the DLS technique by which only 'a bunch of grapes' is analyzed but 'grains of grapes in the bunch' cannot be. It is because the DLS technique in principle evaluates diffusion constants of particles and all of the grains in the same bunch of grapes diffuse as a whole. Thus, the methodology is important to highlight versatility and diversity in real materials, especially in soft matter, both in the liquid and in the solid states.

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New Polymeric Materials Based on Element-Blocks

Cited by 326 publications

References 44 publications

Creative Synthesis of Organic–Inorganic Molecular Hybrid Materials

Creative Synthesis of Organic–Inorganic Molecular Hybrid Materials

Tetramer and Polymer of 2,7-Dialkoxy-9H-9-silafluorene Composed of Si Backbone and π-Stacked Biphenylene Groups

SAXS Evaluation of Size Distribution for Nanoparticles

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