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Cao Y, Xu S, Li L, Zheng S. Physically cross-linked networks of POSS-capped poly(acrylate amide)s: Synthesis, morphologies, and shape memory behavior. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24303] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yuqin Cao
- Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University; Shanghai 200240 People's Republic of China
| | - Sen Xu
- Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University; Shanghai 200240 People's Republic of China
| | - Lei Li
- Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University; Shanghai 200240 People's Republic of China
| | - Sixun Zheng
- Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites; Shanghai Jiao Tong University; Shanghai 200240 People's Republic of China
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Saito S, Yamasue N, Wada H, Shimojima A, Kuroda K. Cubic Siloxanes with Both Si-H and Si-OtBu Groups for Site-Selective Siloxane Bond Formation. Chemistry 2016; 22:13857-13864. [PMID: 27535611 DOI: 10.1002/chem.201601906] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Indexed: 11/11/2022]
Abstract
Cage-type siloxanes have attracted increasing attention as building blocks for silica-based nanomaterials as their corners can be modified with various functional groups. Cubic octasiloxanes incorporating both Si-H and Si-OtBu groups [(tBuO)n H8-n Si8 O12 ; n=1, 2 or 7] have been synthesized by the reaction of octa(hydridosilsesquioxane) (H8 Si8 O12 ) and tert-butyl alcohol in the presence of a Et2 NOH catalyst. The Si-H and Si-OtBu groups are useful for site-selective formation of Si-O-Si linkages without cage structure deterioration. The Si-H group can be selectively hydrolyzed to form a Si-OH group in the presence of Et2 NOH, enabling the formation of the monosilanol compound (tBuO)7 (HO)Si8 O12 . The Si-OH group can be used for either intermolecular condensation to form a dimeric cage compound or silylation to introduce new reaction sites. Additionally, the alkoxy groups of (tBuO)7 HSi8 O12 can be treated with organochlorosilanes in the presence of a BiCl3 catalyst to form Si-O-Si linkages, while the Si-H group remains intact. These results indicate that such bifunctional cage siloxanes allow for stepwise Si-O-Si bond formation to design new siloxane-based nanomaterials.
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Affiliation(s)
- Shohei Saito
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Nao Yamasue
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Hiroaki Wada
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan.
| | - Kazuyuki Kuroda
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan. .,Kagami Memorial Research Institute for Materials Science and Technology, Nishiwaseda-2, Shinjuku-ku, Tokyo, 169-0051, Japan.
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Yamane H, Tanaka K, Chujo Y. Simple and valid strategy for the enhancement of the solid-emissive property of boron dipyrromethenes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang K, Luo Y, Huang S, Yang H, Liu B, Wang M. Highly fluorescent polycaprolactones decorated with di(thiophene-2-yl)-diketopyrrolopyrrole: A covalent strategy of tuning fluorescence properties in solid states. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27531] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kai Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
| | - Yimin Luo
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
| | - Shuo Huang
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
| | - Hongbin Yang
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
| | - Bin Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
| | - Mingfeng Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University; Singapore 637457 Singapore
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Huang J, Wang W, Gu J, Li W, Zhang Q, Ding Y, Xi K, Zheng Y, Jia X. New bead type and high symmetrical diallyl-POSS based emissive conjugated polyfluorene. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.071] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Xie N, Wang J, Guo Z, Chen G, Li Q. Fluorene/Carbazole Alternating Copolymers Tethered with Polyhedral Oligomeric Silsesquioxanes: Synthesis, Characterization, and Electroluminescent Properties. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Chandramohan A, Dinkaran K, Kumar AA, Alagar M. Synthesis and characterization of epoxy modified cyanate ester POSS nanocomposites. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312441640] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Polyhedral oligomeric silsesquioxane (POSS) viz; namely, Octa functional silsesquioxanes [octa amino (OAPS) and octa glycidyl (OG)] reinforced epoxy modified cyanate ester nanocomposites were prepared through intercrosslinked network. The intercrosslinking formation between cyanate ester and POSS was confirmed by Fourier transform infrared spectroscopy. The morphology of nanocomposites was studied using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and atomic force microscopy techniques. The electrical properties of the nanocomposites were evaluated by impedance analyzer. The influences of POSS macromer on the thermal and mechanical properties of epoxy modified cyanate ester nanocomposites were also addressed. The thermogravimetric analysis indicates that the thermal stability of the nanocomposites increases with increasing percentage of both types of POSS macromer. The dielectric constant and dielectric loss are decreased with increasing POSS concentration in the epoxy modified cyanate ester nanocomposites.
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Affiliation(s)
- Ayyavu Chandramohan
- Polymer Nanocomposites Laboratory, Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai, India
| | - Kanniyan Dinkaran
- Department of Chemistry, MIT Campus, Anna University, Chennai, India
| | - Achimuthu Ashok Kumar
- Department of Chemistry, Arulmigu Palaniandavar College of Arts and Culture, Palani, India
| | - Muthukaruppan Alagar
- Polymer Nanocomposites Laboratory, Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai, India
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Pérez-Ojeda ME, Trastoy B, López-Arbeloa Í, Bañuelos J, Costela Á, García-Moreno I, Chiara JL. Click assembly of dye-functionalized octasilsesquioxanes for highly efficient and photostable photonic systems. Chemistry 2011; 17:13258-68. [PMID: 22012888 DOI: 10.1002/chem.201100512] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 07/21/2011] [Indexed: 11/09/2022]
Abstract
New hybrid organic-inorganic dyes based on an azide-functionalized cubic octasilsesquioxane (POSS) as the inorganic part and a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BDP) chromophore as the organic component have been synthesized by copper(I)-catalyzed 1,3-dipolar cycloaddition of azides to alkynes. We have studied the effects of the linkage group of BDP to the POSS unit and the degree of functionalization of this inorganic core on the ensuing optical properties by comparison with model dyes. The high fluorescence of the BDP dye is preserved in spite of the linked chain at its meso position, even after attaching one BDP moiety to the POSS core. The laser action of the new dyes has been analyzed under transversal pumping at 532 nm in both the liquid phase and when incorporated into solid polymeric matrices. The monosubstituted new hybrid dye exhibits high lasing efficiency of up to 56 % with high photostability, with its laser output remaining at the initial value after 4×10(5) pump pulses in the same position of the sample at a repetition rate of 30 Hz. However, functionalization of the POSS core with eight fluorophores leads to dye aggregation, as quantum mechanical simulation has revealed, worsening the optical properties and extinguishing the laser action. The new hybrid systems based on dye-linked POSS nanoparticles open up the possibility of using these new photonic materials as alternative sources for optoelectronic devices, competing with dendronized or grafted polymers.
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Wang L, Zeng K, Zheng S. Hepta(3,3,3-trifluoropropyl) polyhedral oligomeric silsesquioxane-capped poly(N-isopropylacrylamide) telechelics: synthesis and behavior of physical hydrogels. ACS APPLIED MATERIALS & INTERFACES 2011; 3:898-909. [PMID: 21381657 DOI: 10.1021/am101258k] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Hepta(3,3,3-trifluoropropyl) polyhedral oligomeric silsesquioxane (POSS)-capped poly(N-isopropylacrylamide) (PNIPAAm) telechelics with variable lengths of PNIPAAm midblocks were synthesized by the combination of reversible addition-fragmentation chain transfer polymerization (RAFT) and the copper-catalyzed Huisgen 1,3-cycloaddition (i.e., click chemistry). The POSS-capped trithiocarbonate was synthesized and used as the chain transfer agent for the RAFT polymerization of N-isopropylacrylamide. The organic-inorganic amphiphilic telechelics were characterized by means of nuclear magnetic resonance spectroscopy (NMR) and gel permeation chromatography (GPC). Atomic force microscopy (AFM) shows that all the POSS-capped PNIPAAm telechelics exhibited microphase-separated morphologies, in which the POSS terminal groups were self-assembled into the microdomains and dispersed into the continuous PNIPAAm matrices. The POSS nanodomains could behave as the physical cross-linking sites and as a result the physical hydrogels were formed while these POSS-capped PNIPAAm telechelics were subjected to the solubility tests with water. These physical hydrogels possessed well-defined volume phase transition phenomena and displayed rapid reswelling and deswelling thermoresponsive behavior compared to control PNIPAAm hydrogel.
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Affiliation(s)
- Lei Wang
- Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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Cordes DB, Lickiss PD. Preparation and Characterization of Polyhedral Oligosilsesquioxanes. ADVANCES IN SILICON SCIENCE 2011. [DOI: 10.1007/978-90-481-3787-9_2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Shimura T, Miyatake K, Watanabe M. Synthesis, Properties, and Fuel Cell Performance of Perfluorosulfonated Poly(arylene ether)s. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2010. [DOI: 10.1246/bcsj.20100116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chiu YC, Chou IC, Tsai HC, Riang L, Ma CCM. Morphology, thermal and mechanical properties of the polyhedral oligomeric silsesquioxane side-chain epoxy hybrid material. J Appl Polym Sci 2010. [DOI: 10.1002/app.32752] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mikami T, Miyatake K, Watanabe M. Poly(arylene ether)s containing superacid groups as proton exchange membranes. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1714-1721. [PMID: 20491452 DOI: 10.1021/am100224z] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A series of poly(arylene ether)s containing pendant superacid groups on fluorenyl groups were synthesized and their properties were investigated for fuel cell applications. Poly(arylene ether)s containing iodo groups were synthesized by the polymerization of 2,7-diiodo-9,9-bis(4-hydroxyphenyl)fluorene with difluorinated compounds such as decafluorobiphenyl, bis(4-fluorophenyl)sulfone, and bis(4-fluorophenyl)ketone, under nucleophilic substitution conditions. The iodo groups on the fluorenyl groups were converted to perfluorosulfonic acid groups via the Ullmann coupling reaction. The degree of perfluorosulfonation was controlled to be up to 92%, which corresponds to an ion exchange capacity (IEC) of 1.52 meq/g. The ionomers yielded flexible, ductile membranes by solution casting. The ionomer membranes exhibited a characteristic hydrophilic/hydrophobic phase separation, with small interconnected hydrophilic clusters (2-3 nm), which is similar to that of the benchmark perfluorinated membrane (Nafion). The aromatic ionomers containing superacid groups showed much higher proton conductivities than those of the conventional sulfonated aromatic ionomers with similar main chain structures. Fuel cell performance with the superacidic ionomer membranes was also tested.
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Affiliation(s)
- Takefumi Mikami
- Fuel Cell Nanomaterials Center and Clean Energy Research Center, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
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Pu KY, Li K, Liu B. Cationic oligofluorene-substituted polyhedral oligomeric silsesquioxane as light-harvesting unimolecular nanoparticle for fluorescence amplification in cellular imaging. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:643-6. [PMID: 20217765 DOI: 10.1002/adma.200902409] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Affiliation(s)
- Kan-Yi Pu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
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Pu KY, Liu B. Fluorescence Turn-on Responses of Anionic and Cationic Conjugated Polymers toward Proteins: Effect of Electrostatic and Hydrophobic Interactions. J Phys Chem B 2010; 114:3077-84. [DOI: 10.1021/jp906433u] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Kan-Yi Pu
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, 4 Engineering Drive 4, National University of Singapore, Singapore 117576
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Li S, Simon GP, Matisons JG. The effect of incorporation of POSS units on polymer blend compatibility. J Appl Polym Sci 2010. [DOI: 10.1002/app.31225] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zeng K, Fang Y, Zheng S. Organic-inorganic hybrid hydrogels involving poly(N-isopropylacrylamide) and polyhedral oligomeric silsesquioxane: Preparation and rapid thermoresponsive properties. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/polb.21655] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Liu K, Li Y, Yang M. Novel 1,4-diketo-3,6-diphenyl pyrrolo[3,4-c]pyrrole (DPP)-based copolymers with large Stokes shift. J Appl Polym Sci 2009. [DOI: 10.1002/app.29250] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Chan KL, Sonar P, Sellinger A. Cubic silsesquioxanes for use in solution processable organic light emitting diodes (OLED). ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b909234j] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Poly(ethylene imine) hybrids containing polyhedral oligomeric silsesquioxanes: Preparation, structure and properties. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.07.049] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pu KY, Qi XY, Yang YL, Lu XM, Li TC, Fan QL, Wang C, Liu B, Chan H, Huang W. Supramolecule-Regulated Photophysics of Oligo(p-phenyleneethynylene)-Based Rod–Coil Block Copolymers: Effect of Molecular Architecture. Chemistry 2008; 14:1205-15. [DOI: 10.1002/chem.200700305] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pu KY, Chen Y, Qi XY, Qin CY, Chen QQ, Wang HY, Deng Y, Fan QL, Huang YQ, Liu SJ, Wei W, Peng B, Huang W. Synthesis of grafted poly(p-phenyleneethynylene) with energy donor–acceptor architecture via atom transfer radical polymerization: Towards nonaggregating and hole-facilitating light-emitting material. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.22129] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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