-
Article
Preparation of D-A copolymers based on dithiazologermole and germaindacenodithiazole as weak electron donor units
Distannylated dithiazologermole and germaindacenodithiazole were copolymerized with dibrominated 2,1,3-benzothiadiazole and 4,7-di(thiazol-2-yl)-2,1,3-benzothiadiazole to produce four new donor-acceptor conjug...
-
Article
Conjugated polymers with thiophene-fused thiaborin units and their strong intermolecular interactions
Boron-incorporated p−π* conjugated polymers have been studied as optoelectronic and sensor materials. p−π* conjugated polymers usually possess bulky aryl groups that kinetically stabilize the boron centers, an...
-
Article
Preparation of urea- and isocyanurate-containing polysilsesquioxane membranes for CO2 separation
Urea- and isocyanurate-containing polysilsesquioxane (PSQ) membranes were prepared and their CO2 separation performance was investigated. Applying the sol–gel process to N,N’-bis(triethoxysilylpropyl)urea (BTESPU...
-
Article
Gel structure and water desalination properties of divinylpyrazine-bridged polysilsesquioxanes
A divinylpyrazine-bridged trialkoxysilane, 2,5-bis[2-(triethoxysilyl)vinyl]pyrazine (BTES-VPz), was synthesized for use as a reverse osmosis membrane. The gel structure and water desalination properties of BTE...
-
Article
Preparation and film properties of polysiloxanes consisting of di- and quadra-functional hybrid units
1,1,1,5,5,5-Hexaethoxy-3,3-dimethyltrisiloxane (QDQ), consisting of di- (D) and quadra-functional (Q) siloxane units, and its polymer (pQDQ) were synthesized. As the comparison, co-hydrolysis of diethoxy(dimet...
-
Article
Preparation of amine- and ammonium-containing polysilsesquioxane membranes for CO2 separation
Amine-containing polysilsesquioxane (PSQ) membranes were studied with regard to their CO2 separation ability. PSQ membranes were prepared by the sol–gel process using three amine-containing monomers, bis(triethox...
-
Article
Synthesis and optical properties of disiloxane-linked decathiophene and dodecathiophene polymers
Disiloxane-linked decathiophene and dodecathiophene polymers were prepared and their optical properties were examined. Compared with the monosilane-linked congeners reported previously, these polymers showed s...
-
Article
Preparation and water desalination properties of bridged polysilsesquioxane membranes with divinylbenzene and divinylpyridine units
Bridged polysilsesquioxanes are promising materials for reverse osmosis membranes because they exhibit robust properties. To investigate the effects of the polarity and rigidity of organic components of the po...
-
Article
Preparation of robust RO membranes for water desalination by interfacial copolymerization of bis[(triethoxysilyl)propyl]amine and bis(triethoxysilyl)ethane
Bridged polysilsesquioxane membranes have been expected as robust RO membranes for water desalination. However, water permeability of the membranes was not sufficiently high. In the present work, we studied in...
-
Article
Bridged polysilsesquioxane membranes for water desalination
Water desalination through a reverse osmosis (RO) membrane is an important technology for producing pure water from seawater. High-performance membrane materials have been extensively developed because these m...
-
Chapter
Si-, Ge-, and Sn-Bridged Biaryls as π-Conjugated Element Blocks
Biaryls, such as bithiophene and bipyridyl, are intramolecularly bridged by group 14 heavy elements, silicon, germanium, and tin, to produce element blocks having condensed tricyclic systems with silole, germo...
-
Article
Preparation of bridged polysilsesquioxane-based membranes containing 1,2,3-triazole moieties for water desalination
To develop reverse osmosis membranes with high water permeance, new organically bridged trialkoxysilanes, 1,4-bis(triethoxysilylmethyl)1,2,3-triazole (BTES-MAz) and 3-methyl-1,4-bis(triethoxysilylmethyl)-1,2,3-tr...
-
Article
Oligosiloxanes with Silatrane Moieties for Use in Lithium-ion Conductive Matrices
Solvent-free polymer electrolytes are critical for improving the performance of electrochemical devices. With the aim of develo** a new silicon-based polymer electrolyte that does not contain poly(ethylene o...
-
Article
Synthesis of silicon- or carbon-bridged polythiophenes and application to organic thin-film transistors
Silicon- and carbon-bridged polythiophenes, dithienosilole (DTS) and cyclopentadithiophene (DTC) homopolymers with 2-ethylhexyl or n-octyl substituents on the bridging atom, were synthesized and their optical and...
-
Article
Synthesis of new D-A polymers containing disilanobithiophene donor and application to bulk heterojunction polymer solar cells
New donor–acceptor-conjugated polymers with disilanobithiophene as the donor and dithienylbenzothiadiazole, thienopyrroledione or diketopyrrolopyrrole as the acceptor were synthesized and their optical and ele...
-
Article
Preparation and separation properties of porous norbornane-bridged silica membrane
Bis(trimethoxysilyl)norbornane (BTMSN) bearing a highly rigid norbornane bridge was employed as a new silica membrane precursor. The membrane prepared by subjecting BTMSN to the sol–gel process was examined fo...
-
Article
Effects of substituents and molecular weight on the optical, thermal and photovoltaic properties of alternating dithienogermole–dithienylbenzothiadiazole polymers
Dithienogermole-dithienylbenzothiadiazole alternating polymers with high molecular weights were synthesized. Optical properties of the polymers were investigated with respect to UV-Vis absorption spectroscopy,...
-
Article
Polymerization behavior and gel properties of ethane, ethylene and acetylene-bridged polysilsesquioxanes
Soluble bridged polysilsesquioxanes with a range of molecular weight were synthesized from bis(triethoxysilyl)ethane, ethylene, and acetylene (BTES-E1, -E2, and -E3) via hydrolysis and polycondensation reactio...
-
Article
Synthesis and optical and photovoltaic properties of dithienosilole–dithienylpyridine and dithienosilole–pyridine alternate polymers and polymer–B(C6F5)3 complexes
Donor–acceptor (D–A)-type alternate polymers were synthesized, with either dithienyldithienosilole or dithienosilole as the donor and pyridine as the acceptor, and they exhibited broad absorption peaks at appr...
-
Article
Synthesis and properties of dithienometallole-pyridinochalcogenadiazole alternate polymers
Donor–acceptor-type alternate polymers composed of dithienometallole (metal=Si or Ge) and pyridinocalcogenadiazole (chalcogen=S or Se) units with the molecular weights of Mn=5700–7400 (Mw/Mn=1.3–1.7) were obtaine...
