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Your search keyword '"Furukawa, Shuhei"' showing total 48 results
Start Over Author "Furukawa, Shuhei" Publisher royal society of chemistry (rsc)
48 results on '"Furukawa, Shuhei"'

7. Multiscale structural control of linked metal–organic polyhedra gel by aging-induced linkage-reorganization

Author

Wang, Zaoming, Villa Santos, Christian, Legrand, Alexandre, Haase, Frederik, Hara, Yosuke, Kanamori, Kazuyoshi, Aoyama, Takuma, Urayama, Kenji, Doherty, Cara M., Smales, Glen J., Pauw, Brian R., Colón, Yamil J., Furukawa, Shuhei, Wang, Zaoming, Villa Santos, Christian, Legrand, Alexandre, Haase, Frederik, Hara, Yosuke, Kanamori, Kazuyoshi, Aoyama, Takuma, Urayama, Kenji, Doherty, Cara M., Smales, Glen J., Pauw, Brian R., Colón, Yamil J., and Furukawa, Shuhei

Abstract

Assembly of permanently porous metal–organic polyhedra/cages (MOPs) with bifunctional linkers leads to soft supramolecular networks featuring both porosity and processability. However, the amorphous nature of such soft materials complicates their characterization and thus limits rational structural control. Here we demonstrate that aging is an effective strategy to control the hierarchical network of supramolecular gels, which are assembled from organic ligands as linkers and MOPs as junctions. Normally, the initial gel formation by rapid gelation leads to a kinetically trapped structure with low controllability. Through a controlled post-synthetic aging process, we show that it is possible to tune the network of the linked MOP gel over multiple length scales. This process allows control on the molecular-scale rearrangement of interlinking MOPs, mesoscale fusion of colloidal particles and macroscale densification of the whole colloidal network. In this work we elucidate the relationships between the gel properties, such as porosity and rheology, and their hierarchical structures, which suggest that porosity measurement of the dried gels can be used as a powerful tool to characterize the microscale structural transition of their corresponding gels. This aging strategy can be applied in other supramolecular polymer systems particularly containing kinetically controlled structures and shows an opportunity to engineer the structure and the permanent porosity of amorphous materials for further applications.

Published
2021

10. Multiscale structural control of linked metal–organic polyhedra gel by aging-induced linkage-reorganization

Author

Wang, Zaoming, primary, Villa Santos, Christian, additional, Legrand, Alexandre, additional, Haase, Frederik, additional, Hara, Yosuke, additional, Kanamori, Kazuyoshi, additional, Aoyama, Takuma, additional, Urayama, Kenji, additional, Doherty, Cara M., additional, Smales, Glen J., additional, Pauw, Brian R., additional, Colón, Yamil J., additional, and Furukawa, Shuhei, additional

Published
2021
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15. Understanding the multiscale self-assembly of metal–organic polyhedra towards functionally graded porous gels

Author

20263147, 90452276, Legrand, Alexandre, Craig, A., Gavin, Bonneau, Mickaele, Minami, Saori, Urayama, Kenji, Furukawa, Shuhei, 20263147, 90452276, Legrand, Alexandre, Craig, A., Gavin, Bonneau, Mickaele, Minami, Saori, Urayama, Kenji, and Furukawa, Shuhei

Abstract

Spatial heterogeneity and gradients within porous materials are key for controlling their mechanical properties and mass/energy transport, both in biological and synthetic materials. However, it is still challenging to induce such complexity in well-defined microporous materials such as crystalline metal–organic frameworks (MOFs). Here we show a method to generate a continuous gradient of porosity over multiple length scales by taking advantage of the amorphous nature of supramolecular polymers based on metal–organic polyhedra (MOPs). First, we use time-resolved dynamic light scattering (TRDLS) to elucidate the mechanism of hierarchical self-assembly of MOPs into colloidal gels and to understand the relationship between the MOP concentrations and the architecture of the resulting colloidal networks. These features directly impact the viscoelastic response of the gels and their mechanical strength. We then show that gradients of stiffness and porosity can be created within the gel by applying centrifugal force at the point of colloidal aggregation. These results with the creation of asymmetric and graded pore configuration in soft materials could lead to the emergence of advanced properties that are coupled to asymmetric molecule/ion transport as seen in biological systems.

Published
2019

17. Partially fluorinated MIL-101(Cr): from a miniscule structure modification to a huge chemical environment transformation inspected by 129Xe NMR

Author

Díaz-Ramírez, Mariana L., primary, Sánchez-González, Elí, additional, Álvarez, J. Raziel, additional, González-Martínez, Gerardo A., additional, Horike, Satoshi, additional, Kadota, Kentaro, additional, Sumida, Kenji, additional, González-Zamora, Eduardo, additional, Springuel-Huet, Marie-Anne, additional, Gutiérrez-Alejandre, Aída, additional, Jancik, Vojtech, additional, Furukawa, Shuhei, additional, Kitagawa, Susumu, additional, Ibarra, Ilich A., additional, and Lima, Enrique, additional

Published
2019
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18. Switchable gate-opening effect in metal–organic polyhedra assemblies through solution processing

Author

20140303, 90452276, Craig, Gavin A., Larpent, Patrick, Kusaka, Shinpei, Matsuda, Ryotaro, Kitagawa, Susumu, Furukawa, Shuhei, 20140303, 90452276, Craig, Gavin A., Larpent, Patrick, Kusaka, Shinpei, Matsuda, Ryotaro, Kitagawa, Susumu, and Furukawa, Shuhei

Abstract

Gate-opening gas sorption is known for metal–organic frameworks, and is associated with structural flexibility and advantageous properties for sensing and gas uptake. Here, we show that gate-opening is also possible for metal–organic polyhedra (MOPs), and depends on the molecular organisation in the lattice. Thanks to the solubility of MOPs, several interchangeable solvatomorphs of a lantern-type MOP were synthesised via treatment with different solvents. One phase obtained through use of methanol induced a gate-opening effect in the lattice in response to carbon dioxide uptake. The sorption process was thoroughly investigated with in situ powder X-ray diffraction and simultaneous adsorption experiments. Meanwhile, solution processing of this flexible phase using THF led to a permanently porous phase without a gate-opening effect. Furthermore, we find that we can change the metallic composition of the MOP, and yet retain flexibility. By showing that gate-opening can be switched on and off depending on the solvent of crystallisation, these findings have implications for the solution-based processing of MOPs.

Published
2018

21. Light responsive metal-organic frameworks as controllable CO-releasing cell culture substrates

Author

20140303, 90452276, Diring, Stéphane, Carné-Sánchez, Arnau, Zhang, Ji Cheng, Ikemura, Shuya, Kim, Chiwon, Inaba, Hiroshi, Kitagawa, Susumu, Furukawa, Shuhei, 20140303, 90452276, Diring, Stéphane, Carné-Sánchez, Arnau, Zhang, Ji Cheng, Ikemura, Shuya, Kim, Chiwon, Inaba, Hiroshi, Kitagawa, Susumu, and Furukawa, Shuhei

Abstract

A new carbon monoxide (CO)-releasing material has been developed by embedding a manganese carbonyl complex, MnBr(bpydc)(CO)3 (bpydc = 5, 5′-dicarboxylate-2, 2′-bipyridine) into a highly robust Zr(iv)-based metal-organic framework (MOF). Efficient and controllable CO-release was achieved under exposure to low intensity visible light. Size-controllable nanocrystals of the photoactive MOF were obtained and their CO-releasing properties were correlated with their crystal sizes. The photoactive crystals were processed into cellular substrates with a biocompatible polymer matrix, and the light-induced delivery of CO and its subsequent cellular uptake were monitored using a fluorescent CO-probe. The results discussed here demonstrate a new opportunity to use MOFs as macromolecular scaffolds towards CO-releasing materials and the advantage of MOFs for high CO payloads, which is essential in future therapeutic applications.

Published
2017

25. Emerging applications of metal–organic frameworks

Author

Ricco, Raffaele, primary, Pfeiffer, Constance, additional, Sumida, Kenji, additional, Sumby, Christopher J., additional, Falcaro, Paolo, additional, Furukawa, Shuhei, additional, Champness, Neil R., additional, and Doonan, Christian J., additional

Published
2016
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26. Mesoscopic superstructures of flexible porous coordination polymers synthesized via coordination replication

Author

00188989, 60452265, 90452276, 20140303, Sumida, Kenji, Moitra, Nirmalya, Reboul, Julien, Fukumoto, Shotaro, Nakanishi, Kazuki, Kanamori, Kazuyoshi, Furukawa, Shuhei, Kitagawa, Susumu, 00188989, 60452265, 90452276, 20140303, Sumida, Kenji, Moitra, Nirmalya, Reboul, Julien, Fukumoto, Shotaro, Nakanishi, Kazuki, Kanamori, Kazuyoshi, Furukawa, Shuhei, and Kitagawa, Susumu

Abstract

The coordination replication technique is employed for the direct conversion of a macro- and mesoporous Cu(OH)2-polyacrylamide composite to three-dimensional superstructures consisting of the flexible porous coordination polymers, Cu2(bdc)2(MeOH)2 and Cu2(bdc)2(bpy) (bdc2- = 1, 4-benzenedicarboxylate, bpy = 4, 4′-bipyridine). Detailed characterization of the replicated systems reveals that the structuralization plays an important role in determining the adsorptive properties of the replicated systems, and that the immobilization of the crystals within a higher-order architecture also affects its structural and dynamic properties. The polyacrylamide polymer is also found to be crucial for maintaining the structuralization of the monolithic systems, and in providing the mechanical robustness required for manual handling. In all, the results discussed here demonstrate a significant expansion in the scope of the coordination replication strategy, and further confirms its utility as a highly versatile platform for the preparation of functional three-dimensional superstructures of porous coordination polymers.

Published
2015

36. Programmed crystallization via epitaxial growth and ligand replacement towards hybridizing porous coordination polymer crystals

Author

Hirai, Kenji, primary, Chen, Kebi, additional, Fukushima, Tomohiro, additional, Horike, Satoshi, additional, Kondo, Mio, additional, Louvain, Nicolas, additional, Kim, Chiwon, additional, Sakata, Yoko, additional, Meilikhov, Mikhail, additional, Sakata, Osami, additional, Kitagawa, Susumu, additional, and Furukawa, Shuhei, additional

Published
2013
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40. Direct synthesis of nanoporous carbon nitride fibers using Al-based porous coordination polymers (Al-PCPs)

Author

Hu, Ming, primary, Reboul, Julien, additional, Furukawa, Shuhei, additional, Radhakrishnan, Logudurai, additional, Zhang, Yuanjian, additional, Srinivasu, Pavuluri, additional, Iwai, Hideo, additional, Wang, Hongjing, additional, Nemoto, Yoshihiro, additional, Suzuki, Norihiro, additional, Kitagawa, Susumu, additional, and Yamauchi, Yusuke, additional

Published
2011
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