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Dewa T, Kimoto K, Kasagi G, Harada H, Sumino A, Kondo M. Functional Coupling of Biohybrid Photosynthetic Antennae and Reaction Center Complexes: Quantitative Comparison with Native Antennae. J Phys Chem B 2023; 127:10315-10325. [PMID: 38015096 DOI: 10.1021/acs.jpcb.3c04922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Light-harvesting (LH) complexes in photosynthetic organisms absorb photons within limited wavelength ranges over a broad solar spectrum. Extension of the LH wavelength has been realized by attaching artificial fluorophores to LH complexes (biohybrid LH complexes) for complementing the limited-wavelength regions. However, how efficiently such fluorophores in biohybrid LH complexes function to drive the photocatalytic reaction center (RC) has not been quantitatively evaluated, specifically in comparison with native LH antenna complexes. In this study, we prepared various biohybrid LH1-RC complexes (from Rhodopseudomonas palustris), to quantitatively evaluate the LH activity of the attached external chromophores through a photocurrent generation reaction by LH1-RC on an electrode. For a direct comparison of the LH activity among the LH chromophores that were examined, we introduced the k1 term, which represents the extent of the functional coupling of LH and the photochemical reactions in the RC. We determined that the hydrophobic fluorophore ATTO647N attached to LH1 possesses the highest LH activity among the examined hydrophilic fluorophores such as Alexa647, and its activity is comparable to that of native LH1(-RC). The LH activity of LH2 (from Rhodoblastus acidophilus strain 10050) and its biohybrid LH2s were examined for the comprehensive assessment of their LH activity.
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Affiliation(s)
- Takehisa Dewa
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Komei Kimoto
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Genki Kasagi
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Hiromi Harada
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Ayumi Sumino
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
| | - Masaharu Kondo
- Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
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2
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Rogati GMA, Capecci C, Fazio E, Serroni S, Puntoriero F, Campagna S, Guidoni L. Molecular Modelling and Simulations of Light-Harvesting Decanuclear Ru-Based Dendrimers for Artificial Photosynthesis. Chemistry 2022; 28:e202103310. [PMID: 34752652 PMCID: PMC9299829 DOI: 10.1002/chem.202103310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Indexed: 11/08/2022]
Abstract
The structure of a decanuclear photo- and redox-active dendrimer based on Ru(II) polypyridine subunits, suitable as a light-harvesting multicomponent species for artificial photosynthesis, has been investigated by means of computer modelling. The compound has the general formula [Ru{(μ-dpp)Ru[(μ-dpp)Ru(bpy)2 ]2 }3 ](PF6 )20 (Ru10; bpy=2,2'-bipyridine; dpp=2,3-bis(2'-pyridyl)pyrazine). The stability of possible isomers of each monomer was investigated by performing classical molecular dynamics (MD) and quantum mechanics (QM) simulations on each monomer and comparing the results. The number of stable isomers is reduced to 36 with a prevalence of MER isomerism in the central core, as previously observed by NMR experiments. The simulations on decanuclear dendrimers suggest that the stability of the dendrimer is not linked to the stability of the individual monomers composing the dendrimer but rather governed by the steric constrains originated by the multimetallic assembly. Finally, the self-aggregation of Ru10 and the distribution of the counterions around the complexes is investigated using Molecular Dynamics both in implicit and explicit acetonitrile solution. In representative examples, with nine and four dendrimers, the calculated pair distribution function for the ruthenium centers suggests a self-aggregation mechanism in which the dendrimers are approaching in small blocks and then aggregate all together. Scanning transmission electron microscopy complements the investigation, supporting the formation of different aggregates at various concentrations.
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Affiliation(s)
- Giovanna M. A. Rogati
- Dipartimento di Ingegneria Scienze dell'Informazione e MatematicaUniversità dell'AquilaVia Vetoio 2, Coppito67100L'AquilaItaly
| | - Chiara Capecci
- Dipartimento di Ingegneria Scienze dell'Informazione e MatematicaUniversità dell'AquilaVia Vetoio 2, Coppito67100L'AquilaItaly
- Dipartimento di FisicaUniversità di Roma La SapienzaPiazzale Aldo Moro, 500185RomaItaly
| | - Enza Fazio
- Dipartimento di Scienze Matematiche e Informatiche Scienze Fisiche e Scienze della TerraUniversità di MessinaPiazza Pugliatti, 198122MessinaItaly
| | - Scolastica Serroni
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed AmbientaliUniversità di MessinaPiazza Pugliatti, 198122MessinaItaly
| | - Fausto Puntoriero
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed AmbientaliUniversità di MessinaPiazza Pugliatti, 198122MessinaItaly
| | - Sebastiano Campagna
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed AmbientaliUniversità di MessinaPiazza Pugliatti, 198122MessinaItaly
| | - Leonardo Guidoni
- Dipartimento di Scienze Fisiche e ChimicheUniversità dell'AquilaVia Vetoio, 2, Coppito67100L'AquilaItaly
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3
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Photochemical hydrogen evolution using Pt/titania nanosheet catalysts prepared by chemical-reduction and photo-deposition methods. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2021.100271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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4
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Hirade Y, Ishida T, Shimada T, Takagi S. Adsorption and absorption behavior of cationic porphyrin on titania and clay nanosheets. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Shimoda Y, Miyata K, Funaki M, Ehara T, Morimoto T, Nozawa S, Adachi SI, Ishitani O, Onda K. Determining Excited-State Structures and Photophysical Properties in Phenylphosphine Rhenium(I) Diimine Biscarbonyl Complexes Using Time-Resolved Infrared and X-ray Absorption Spectroscopies. Inorg Chem 2021; 60:7773-7784. [PMID: 33971089 DOI: 10.1021/acs.inorgchem.1c00146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have explored the structural factors on the photophysical properties in two rhenium(I) diimine complexes in acetonitrile solution, cis,trans-[Re(dmb)(CO)2(PPh2Et)2]+ (Et(2,2)) and cis,trans-[Re(dmb)(CO)2(PPh3)2]+ ((3,3)) (dmb = 4,4'-dimethyl-2,2'-bipyridine, Ph = phenyl, Et = ethyl) using the combination method of time-resolved infrared spectroscopy, time-resolved extended X-ray absorption fine structure, and quantum chemical calculations. The difference between these complexes is the number of phenyl groups in the phosphine ligand, and this only indirectly affects the central Re(I). Despite this minor difference, the complexes exhibit large differences in emission wavelength and excited-state lifetime. Upon photoexcitation, the bond length of Re-P and angle of P-Re-P are significantly changed in both complexes, while the phenyl groups are largely rotated by ∼20° only in (3,3). In contrast, there is little change in charge distribution on the phenyl groups when Re to dmb charge transfer occurs upon photoexcitation. We concluded that the instability from steric effects of phenyl groups and diimine leads to a smaller Stokes shift of the lowest excited triplet state (T1) in (3,3). The large structural change between the ground and excited states causes the longer lifetime of T1 in (3,3).
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Affiliation(s)
- Yuushi Shimoda
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kiyoshi Miyata
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masataka Funaki
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Takumi Ehara
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tatsuki Morimoto
- Department of Applied Chemistry, School of Engineering, Tokyo University of Technology, Katakuramachi, Hachioji, Tokyo 192-0982, Japan
| | - Shunsuke Nozawa
- Photon Factory, Institute of Materials Structure Sciences, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Shin-Ichi Adachi
- Photon Factory, Institute of Materials Structure Sciences, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Osamu Ishitani
- Department of Chemistry, School of Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ken Onda
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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6
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Onishi R, Sano K, Shimada T, Ishida T, Takagi S. Dye-Sensitized Hydrogen Production by Porphyrin/Rh-Doped-Titania-Nanosheet Complex. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200348] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ryota Onishi
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Keito Sano
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Tetsuya Shimada
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Tamao Ishida
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Gold Chemistry, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachiohji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-based Society (ReHES), Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachiohji, Tokyo 192-0397, Japan
| | - Shinsuke Takagi
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
- Research Center for Hydrogen Energy-based Society (ReHES), Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachiohji, Tokyo 192-0397, Japan
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7
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The search for panchromatic light-harvesting systems: Ternary and binary antennae based on self-organised materials. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Tominaga S, Sano K, Hirade Y, Shimada T, Ishida T, Takagi S. Adsorption orientation control of porphyrin on titania-nanosheet. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Wei Y, Wan J, Yang N, Yang Y, Ma Y, Wang S, Wang J, Yu R, Gu L, Wang L, Wang L, Huang W, Wang D. Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores. Natl Sci Rev 2020; 7:1638-1646. [PMID: 34691499 PMCID: PMC8290956 DOI: 10.1093/nsr/nwaa059] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/01/2020] [Accepted: 03/27/2020] [Indexed: 12/18/2022] Open
Abstract
In nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous shells composed of nanoparticle subunits. Structurally, HoMSs consist of different band-gap materials outside-in, thus realizing the efficient harvesting of light with different wavelengths. Moreover, introducing oxygen vacancies into each nanoparticle subunit can also enhance the light absorption. With the benefit of sequential harvesting of light in HoMSs, the quantum efficiency at wavelength of 400 nm is enhanced by six times compared with the corresponding nanoparticles. Impressively, using these aforementioned materials as photocatalysts, highly efficient photocatalytic water splitting is realized, which cannot be achieved by using the nanoparticle counterparts. This new concept of temporally-spatially sequential harvesting of solar light paves the way for solving the ever-growing energy demand.
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Affiliation(s)
- Yanze Wei
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jiawei Wan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Nailiang Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Yang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yanwen Ma
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
| | - Songcan Wang
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Australia
| | - Jiangyan Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Ranbo Yu
- Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lin Gu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lianhui Wang
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
| | - Lianzhou Wang
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia 4072, Australia
| | - Wei Huang
- School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China
| | - Dan Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100049, China
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10
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Amal R. Promising hollow multi-shelled structures: discovering the temporal-spatial ordering. Natl Sci Rev 2020; 7:1763-1764. [PMID: 34691508 PMCID: PMC8290960 DOI: 10.1093/nsr/nwaa106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Rose Amal
- School of Chemical Engineering, University of New South Wales, Australia
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11
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Highly Active Ruthenium Catalyst Supported on Magnetically Separable Mesoporous Organosilica Nanoparticles. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10175769] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A facile and direct method for synthesizing magnetic periodic mesoporous organosilica nanoparticles from pure organosilane precursors is described. Magnetic ethylene- and phenylene-bridged periodic mesoporous organosilica nanoparticles (PMO NPs) were prepared by nanoemulsification techniques. For fabricating magnetic ethylene- or phenylene-bridged PMO NPs, hydrophobic magnetic nanoparticles in an oil-in-water (o/w) emulsion were prepared, followed by a sol–gel condensation of the incorporated bridged organosilane precursor (1,2 bis(triethoxysilyl)ethane or 1,4 bis(triethoxysilyl)benzene), respectively. The resulting materials were characterized using high-resolution scanning electron microscopy (HR-SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX) spectroscopy, powder X-ray diffraction (XRD), solid-state NMR analysis, and nitrogen sorption analysis (N2-BET). The magnetic ethylene-bridged PMO NPs were successfully loaded using a ruthenium oxide catalyst by means of sonication and evaporation under mild conditions. The obtained catalytic system, termed Ru@M-Ethylene-PMO NPS, was applied in a reduction reaction of aromatic compounds. It exhibited very high catalytic behavior with easy separation from the reaction medium by applying an external magnetic field.
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12
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Zhou C, Li H. Luminescence resonance energy transfer in hybrid materials based on terbium(iii) complex, rhodamine B and nanoclay. NEW J CHEM 2019. [DOI: 10.1039/c9nj01201j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We prepared a novel kind of luminescent hydrogel based on the combination of terbium(iii) complexes and rhodamine B dye with the LAPONITE® nanoclay.
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Affiliation(s)
- Congdi Zhou
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving
- School of Chemical Engineering and Technology
- Hebei University of Technology
- Tianjin
- China
| | - Huanrong Li
- Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving
- School of Chemical Engineering and Technology
- Hebei University of Technology
- Tianjin
- China
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13
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Yamazaki Y, Rohacova J, Ohtsu H, Kawano M, Ishitani O. Synthesis of Re(I) Rings Comprising Different Re(I) Units and Their Light-Harvesting Abilities. Inorg Chem 2018; 57:15158-15171. [PMID: 30485078 DOI: 10.1021/acs.inorgchem.8b02421] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trimethylamine N-oxide (Me3NO) could selectively remove only one CO ligand from fac-[Re(N^N)(CO)3(PR2R')]+ (N^N = diimine ligand), whereby only the CO ligand in the trans position to the phosphorus ligand was selectively removed to give cis,trans-[ReI(N^N)(CO)2(PR2R')(L)] n+ in good yields. This decarbonylation reaction using Me3NO was found to be especially useful for synthesizing biscarbonyl Re(I) complexes with electron-withdrawing groups in the diimine ligand, which could not be synthesized or were obtained only in low yields by the photochemical method. Me3NO also selectively removed the carbonyl ligands in the trans position to the phosphorus ligands from the edge Re(I) complex units, which have the fac-[Re(N^N)(CO)3(PR2R')]+ structure, in linear-shaped Re(I) multinuclear complexes. This reaction was successfully applied to synthesize a novel precursor with ring-shaped multinuclear Re complexes (Re-rings) comprising different kinds of Re(I) units. The newly synthesized Re-rings, which consist of one Re unit with a 4,4'-bis(trifluoromethyl)-2,2'-bipyridine (CF3bpy) ligand and one or two Re unit(s) with a 2,2'-bipyridine (bpy) ligand, showed almost quantitative excitation-energy harvesting ability from the Re unit(s) with bpy to that with CF3bpy.
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Affiliation(s)
- Yasuomi Yamazaki
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1-NE-1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan
| | - Jana Rohacova
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1-NE-1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan
| | - Hiroyoshi Ohtsu
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1-NE-1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan
| | - Masaki Kawano
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1-NE-1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan
| | - Osamu Ishitani
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1-NE-1, O-okayama , Meguro-ku , Tokyo 152-8550 , Japan
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14
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Bonchio M, Syrgiannis Z, Burian M, Marino N, Pizzolato E, Dirian K, Rigodanza F, Volpato GA, La Ganga G, Demitri N, Berardi S, Amenitsch H, Guldi DM, Caramori S, Bignozzi CA, Sartorel A, Prato M. Hierarchical organization of perylene bisimides and polyoxometalates for photo-assisted water oxidation. Nat Chem 2018; 11:146-153. [PMID: 30510216 DOI: 10.1038/s41557-018-0172-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 10/15/2018] [Indexed: 11/09/2022]
Abstract
The oxygen in Earth's atmosphere is there primarily because of water oxidation performed by photosynthetic organisms using solar light and one specialized protein complex, photosystem II (PSII). High-resolution imaging of the PSII 'core' complex shows the ideal co-localization of multi-chromophore light-harvesting antennas with the functional reaction centre. Man-made systems are still far from replicating the complexity of PSII, as the majority of PSII mimetics have been limited to photocatalytic dyads based on a 1:1 ratio of a light absorber, generally a Ru-polypyridine complex, with a water oxidation catalyst. Here we report the self-assembly of multi-perylene-bisimide chromophores (PBI) shaped to function by interaction with a polyoxometalate water-oxidation catalyst (Ru4POM). The resulting [PBI]5Ru4POM complex shows a robust amphiphilic structure and dynamic aggregation into large two-dimensional paracrystalline domains, a redshifted light-harvesting efficiency of >40% and favourable exciton accumulation, with a peak quantum efficiency using 'green' photons (λ > 500 nm). The modularity of the building blocks and the simplicity of the non-covalent chemistry offer opportunities for innovation in artificial photosynthesis.
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Affiliation(s)
- Marcella Bonchio
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy.
| | - Zois Syrgiannis
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy.,Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Max Burian
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| | - Nadia Marino
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy
| | - Erica Pizzolato
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy.,Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Konstantin Dirian
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials, Erlangen, Germany
| | - Francesco Rigodanza
- Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Giulia Alice Volpato
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy
| | - Giuseppina La Ganga
- Dipartimento di Scienze Chimiche, Università di Messina and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare, Messina, Italy
| | | | - Serena Berardi
- Department of Chemistry and Pharmaceutical Sciences and CNR-ISOF, University of Ferrara, Ferrara, Italy
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials, Erlangen, Germany
| | - Stefano Caramori
- Department of Chemistry and Pharmaceutical Sciences and CNR-ISOF, University of Ferrara, Ferrara, Italy
| | - Carlo Alberto Bignozzi
- Department of Chemistry and Pharmaceutical Sciences and CNR-ISOF, University of Ferrara, Ferrara, Italy
| | - Andrea Sartorel
- CNR-ITM and Dipartimento di Scienze Chimiche, University of Padova, Padova, Italy
| | - Maurizio Prato
- Center of Excellence for Nanostructured Materials (CENMAT) and INSTM, unit of Trieste, Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy. .,CIC BiomaGUNE, San Sebastián, Spain. .,Basque Foundation for Science, Ikerbasque, Bilbao, Spain.
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15
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Immobilization of luminescent Platinum(II) complexes on periodic mesoporous organosilica and their water reduction photocatalysis. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.09.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Morimoto T, Ishitani O. Modulation of the Photophysical, Photochemical, and Electrochemical Properties of Re(I) Diimine Complexes by Interligand Interactions. Acc Chem Res 2017; 50:2673-2683. [PMID: 28994292 DOI: 10.1021/acs.accounts.7b00244] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The photophysical and photochemical properties of transition metal complexes have attracted considerable attention because of their recent applications as photocatalysts in artificial photosynthesis and organic synthesis, as light emitters in electroluminescent (EL) devices, and as dyes in solar cells. The general control methods cannot be always used to obtain transition metal complexes with photochemical properties that are suitable for the above-mentioned applications. In the fields of solar energy conversion, strong metal-to-ligand charge-transfer (MLCT) absorption of redox photosensitizers and/or photocatalysts in the visible region with long wavelength is essential. However, the usual methods, i.e., introduction of electron-withdrawing groups into the electron-accepting ligand and/or weak-field ligands into the central metal, have several drawbacks, including shorter excited-state lifetime, lower emission efficiency, and lower oxidation and reduction power. Herein we describe a new method to control the photophysical, photochemical, and electrochemical properties of Re(I) diimine carbonyl complexes that have been widely used in various fields such as photocatalysts for CO2 reduction and emitters in EL devices and sensors. This method involves the introduction of interligand interactions (π-π and CH-π interactions) into the Re(I) complexes; the aromatic diimine ligand coordinating to the Re center approaches the aryl groups on the phosphine ligand or ligands at the cis position, which "compulsorily" induces a weak interaction between these aromatic groups. As a result of this interligand interaction, the Re complexes with the aromatic diimine ligand and the arylphosphine ligand(s) exhibit red-shifted 1MLCT absorption but afford blue-shifted emission from the triplet metal-to-ligand charge-transfer (3MLCT) excited state. This increases the oxidation power and lifetime of the 3MLCT excited state. These unique property changes are favorable, particularly for redox photosensitizers. The interligand interaction is strongly expressed by the ring-shaped multinuclear Re(I) complexes (Re-rings). In the case of Re-rings with high steric hindrance due to a small inner cavity, the lifetime of the 3MLCT excited state is up to 8 μs and the emission quantum yield is up to 70%. These properties cannot be obtained by the corresponding mononuclear Re(I) complexes, which generally exhibit shorter lifetimes (<1 μs) and lower emission quantum yields (<10%). Some of the Re-rings could be successfully applied as efficient photosensitizers in photocatalytic systems for CO2 reduction; the highest quantum yields for CO2 reduction were achieved by using photocatalytic systems composed of Re-rings as the photosensitizers and Re(I) (82%), Ru(II) (58%), and Mn(I) (48%) complexes as catalysts. This interligand interaction potentially provides unique and useful methods for controlling the photophysical, photochemical, and electrochemical functions of various metal complexes, paving the way to create new functions for metal complexes.
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Affiliation(s)
- Tatsuki Morimoto
- School
of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan
| | - Osamu Ishitani
- Department
of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1, NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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Sonotani A, Shimada T, Takagi S. “Size-matching Effect” in a Cationic Porphyrin–Titania Nanosheet Complex. CHEM LETT 2017. [DOI: 10.1246/cl.161146] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Amane Sonotani
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397
| | - Tetsuya Shimada
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397
- Center for Artificial Photosynthesis, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397
| | - Shinsuke Takagi
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397
- Center for Artificial Photosynthesis, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397
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18
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Morimoto D, Sato K, Saito K, Yagi M, Takagi S, Yui T. Color tuning of cationic pyrene derivatives on a clay nanosheet: Retardation of gradual redshift on clay. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.01.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Croissant JG, Fatieiev Y, Khashab NM. Degradability and Clearance of Silicon, Organosilica, Silsesquioxane, Silica Mixed Oxide, and Mesoporous Silica Nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604634. [PMID: 28084658 DOI: 10.1002/adma.201604634] [Citation(s) in RCA: 391] [Impact Index Per Article: 55.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/13/2016] [Indexed: 05/27/2023]
Abstract
The biorelated degradability and clearance of siliceous nanomaterials have been questioned worldwide, since they are crucial prerequisites for the successful translation in clinics. Typically, the degradability and biocompatibility of mesoporous silica nanoparticles (MSNs) have been an ongoing discussion in research circles. The reason for such a concern is that approved pharmaceutical products must not accumulate in the human body, to prevent severe and unpredictable side-effects. Here, the biorelated degradability and clearance of silicon and silica nanoparticles (NPs) are comprehensively summarized. The influence of the size, morphology, surface area, pore size, and surface functional groups, to name a few, on the degradability of silicon and silica NPs is described. The noncovalent organic doping of silica and the covalent incorporation of either hydrolytically stable or redox- and enzymatically cleavable silsesquioxanes is then described for organosilica, bridged silsesquioxane (BS), and periodic mesoporous organosilica (PMO) NPs. Inorganically doped silica particles such as calcium-, iron-, manganese-, and zirconium-doped NPs, also have radically different hydrolytic stabilities. To conclude, the degradability and clearance timelines of various siliceous nanomaterials are compared and it is highlighted that researchers can select a specific nanomaterial in this large family according to the targeted applications and the required clearance kinetics.
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Affiliation(s)
- Jonas G Croissant
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Yevhen Fatieiev
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
| | - Niveen M Khashab
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia
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20
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Rohacova J, Ishitani O. Photofunctional multinuclear rhenium(i) diimine carbonyl complexes. Dalton Trans 2017; 46:8899-8919. [DOI: 10.1039/c7dt00577f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this review, we summarize the synthesis, photophysical properties and applications of a wide variety of multinuclear complexes consisting of Re(i)-diimine-carbonyl units.
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Affiliation(s)
- Jana Rohacova
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo
- Japan
| | - Osamu Ishitani
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo
- Japan
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21
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Croissant JG, Cattoën X, Durand JO, Wong Chi Man M, Khashab NM. Organosilica hybrid nanomaterials with a high organic content: syntheses and applications of silsesquioxanes. NANOSCALE 2016; 8:19945-19972. [PMID: 27897295 DOI: 10.1039/c6nr06862f] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Organic-inorganic hybrid materials garner properties from their organic and inorganic matrices as well as synergistic features, and therefore have recently attracted much attention at the nanoscale. Non-porous organosilica hybrid nanomaterials with a high organic content such as silsesquioxanes (R-SiO1.5, with R organic groups) and bridged silsesquioxanes (O1.5Si-R-SiO1.5) are especially attractive hybrids since they provide 20 to 80 weight percent of organic functional groups in addition to the known chemistry and stability of silica. In the organosilica family, silsesquioxanes (R-SiO1.5) stand between silicas (SiO2) and silicones (R2SiO), and are variously called organosilicas, ormosil (organically-modified silica), polysilsesquioxanes and silica hybrids. Herein, we comprehensively review non-porous silsesquioxane and bridged silsesquioxane nanomaterials and their applications in nanomedicine, electro-optics, and catalysis.
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Affiliation(s)
- Jonas G Croissant
- Smart Hybrid Materials Laboratory, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
| | - Xavier Cattoën
- Institut Néel, Université Grenoble Alpes and CNRS, Grenoble, France
| | - Jean-Olivier Durand
- Institut Charles Gerhardt Montpellier UMR-5253 CNRS-UM2-ENSCM-UM1cc, 1701 Place Eugène Bataillon, F-34095 Montpelliercedex 05, France
| | - Michel Wong Chi Man
- Institut Charles Gerhardt Montpellier UMR-5253 CNRS-UM2-ENSCM-UM1cc, 1701 Place Eugène Bataillon, F-34095 Montpelliercedex 05, France
| | - Niveen M Khashab
- Smart Hybrid Materials Laboratory, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
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22
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Yamazaki Y, Umemoto A, Ishitani O. Photochemical Hydrogenation of π-Conjugated Bridging Ligands in Photofunctional Multinuclear Complexes. Inorg Chem 2016; 55:11110-11124. [DOI: 10.1021/acs.inorgchem.6b01736] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yasuomi Yamazaki
- Department
of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1, NE-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Akinari Umemoto
- Department
of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1, NE-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Osamu Ishitani
- Department
of Chemistry, Graduate School of Science, Tokyo Institute of Technology, 2-12-1, NE-1, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
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23
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Croissant JG, Fatieiev Y, Omar H, Anjum DH, Gurinov A, Lu J, Tamanoi F, Zink JI, Khashab NM. Periodic Mesoporous Organosilica Nanoparticles with Controlled Morphologies and High Drug/Dye Loadings for Multicargo Delivery in Cancer Cells. Chemistry 2016; 22:9607-15. [DOI: 10.1002/chem.201600587] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Jonas G. Croissant
- Smart Hybrid Materials Laboratory (SHMs) Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology Thuwal Saudi Arabia
- Department of Chemistry and Biochemistry California NanoSystems Institute Jonsson Comprehensive Cancer Center University of California Los Angeles Los Angeles California USA
| | - Yevhen Fatieiev
- Smart Hybrid Materials Laboratory (SHMs) Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Haneen Omar
- Smart Hybrid Materials Laboratory (SHMs) Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Dalaver H. Anjum
- Imaging and Characterization Laboratory King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Andrey Gurinov
- Imaging and Characterization Laboratory King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Jie Lu
- Department of Microbiology Immunology and Molecular Genetics California NanoSystems Institute Jonsson Comprehensive Cancer Center University of California Los Angeles Los Angeles California USA
| | - Fuyuhiko Tamanoi
- Department of Microbiology Immunology and Molecular Genetics California NanoSystems Institute Jonsson Comprehensive Cancer Center University of California Los Angeles Los Angeles California USA
| | - Jeffrey I. Zink
- Department of Chemistry and Biochemistry California NanoSystems Institute Jonsson Comprehensive Cancer Center University of California Los Angeles Los Angeles California USA
| | - Niveen M. Khashab
- Smart Hybrid Materials Laboratory (SHMs) Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology Thuwal Saudi Arabia
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24
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Nakamura T, Son A, Umehara Y, Ito T, Kurihara R, Ikemura Y, Tanabe K. Confined Singlet Oxygen in Mesoporous Silica Nanoparticles: Selective Photochemical Oxidation of Small Molecules in Living Cells. Bioconjug Chem 2016; 27:1058-66. [DOI: 10.1021/acs.bioconjchem.6b00061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Takuma Nakamura
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Aoi Son
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yui Umehara
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Takeo Ito
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Ryohsuke Kurihara
- Department
of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, 252-5258, Japan
| | - Yuta Ikemura
- Department
of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, 252-5258, Japan
| | - Kazuhito Tanabe
- Department
of Chemistry and Biological Science, College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, 252-5258, Japan
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25
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Tsukamoto T, Ramasamy E, Shimada T, Takagi S, Ramamurthy V. Supramolecular Surface Photochemistry: Cascade Energy Transfer between Encapsulated Dyes Aligned on a Clay Nanosheet Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2920-2927. [PMID: 26963843 DOI: 10.1021/acs.langmuir.5b03962] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three coumarin derivatives (7-propoxy coumarin, coumarin-480, and coumarin-540a, 2, 3, and 4, respectively) having different absorption and emission spectra were encapsulated within a water-soluble organic capsule formed by the two positively charged ammonium-functionalized cavitand octaamine (OAm, 1). Guests 2, 3, and 4 absorb in ultraviolet, violet, and blue regions and emit in violet, blue, and green regions, respectively. Energy transfer between the above three coumarin@(OAm)2 complexes assembled on the surface of a saponite clay nanosheet was investigated by steady-state and time-resolved emission techniques. Judging from their emission and excitation spectra, we concluded that the singlet-singlet energy transfer proceeded from 2 to 3, from 2 to 4, and from 3 to 4 when OAm-encapsulated 2, 3, and 4 were aligned on a clay surface as two-component systems. Under such conditions, the energy transfer efficiencies for the paths 2* to 3, 2* to 4, and 3* to 4 were calculated to be 33, 36, and 50% in two-component systems. When all three coumarins were assembled on the surface and 2 was excited, the energy transfer efficiencies for the paths 2* to 3, 2* to 4, and 3* to 4 were estimated to be 32, 34, and 33%. A comparison of energy transfer efficiencies of the two-component and three-component systems revealed that excitation of 2 leads to emission from 4. Successful merging of supramolecular chemistry and surface chemistry by demonstrating novel multi-step energy transfer in a three-component dye encapsulated system on a clay surface opens up newer opportunities for exploring such systems in an artificial light-harvesting phenomenon.
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Affiliation(s)
- Takamasa Tsukamoto
- Department of Chemistry, Graduate School of Science, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Japan Society for the Promotion of Science (JSPS) , Ichibancho, Chiyoda-ku, Tokyo 102-8471, Japan
| | - Elamparuthi Ramasamy
- Department of Chemistry, University of Miami , Coral Gables, Florida 33146-0431, United States
| | - Tetsuya Shimada
- Department of Applied Chemistry, Graduate Course of Urban Environmental Sciences, Tokyo Metropolitan University , 1-1, Minami-ohsawa, Hachiohji-shi, Tokyo 192-0397, Japan
| | - Shinsuke Takagi
- Department of Applied Chemistry, Graduate Course of Urban Environmental Sciences, Tokyo Metropolitan University , 1-1, Minami-ohsawa, Hachiohji-shi, Tokyo 192-0397, Japan
| | - V Ramamurthy
- Department of Chemistry, University of Miami , Coral Gables, Florida 33146-0431, United States
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26
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Fujimura T, Ramasamy E, Ishida Y, Shimada T, Takagi S, Ramamurthy V. Sequential energy and electron transfer in a three-component system aligned on a clay nanosheet. Phys Chem Chem Phys 2016; 18:5404-11. [PMID: 26820105 DOI: 10.1039/c5cp06984j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To achieve the goal of energy transfer and subsequent electron transfer across three molecules, a phenomenon often utilized in artificial light harvesting systems, we have assembled a light absorber (that also serves as an energy donor), an energy acceptor (that also serves as an electron donor) and an electron acceptor on the surface of an anionic clay nanosheet. Since neutral organic molecules have no tendency to adsorb onto the anionic surface of clay, a positively charged water-soluble organic capsule was used to hold neutral light absorbers on the above surface. A three-component assembly was prepared by the co-adsorption of a cationic bipyridinium derivative, cationic zinc porphyrin and cationic octaamine encapsulated 2-acetylanthracene on an exfoliated anionic clay surface in water. Energy and electron transfer phenomena were monitored by steady state fluorescence and picosecond time resolved fluorescence decay. The excitation of 2-acetylanthracene in the three-component system resulted in energy transfer from 2-acetylanthracene to zinc porphyrin with 71% efficiency. Very little loss due to electron transfer from 2-acetylanthracene in the cavitand to the bipyridinium derivative was noticed. Energy transfer was followed by electron transfer from the zinc porphyrin to the cationic bipyridinium derivative with 81% efficiency. Analyses of fluorescence decay profiles confirmed the occurrence of energy transfer and subsequent electron transfer. Merging the concepts of supramolecular chemistry and surface chemistry we realized sequential energy and electron transfer between three hydrophobic molecules in water. Exfoliated transparent saponite clay served as a matrix to align the three photoactive molecules at a close distance in aqueous solutions.
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Affiliation(s)
- Takuya Fujimura
- Department of Physics and Materials Science, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishi-kawatsu-cho, Matsue, Shimane 690-8504, Japan and Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan.
| | - Elamparuthi Ramasamy
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146-0431, USA.
| | - Yohei Ishida
- Division of Material Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Tetsuya Shimada
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan. and Center for Artificial Photosynthesis, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Shinsuke Takagi
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan. and Center for Artificial Photosynthesis, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan
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Croissant JG, Cattoën X, Wong MCM, Durand JO, Khashab NM. Syntheses and applications of periodic mesoporous organosilica nanoparticles. NANOSCALE 2015; 7:20318-34. [PMID: 26585498 DOI: 10.1039/c5nr05649g] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Periodic Mesoporous Organosilica (PMO) nanomaterials are envisioned to be one of the most prolific subjects of research in the next decade. Similar to mesoporous silica nanoparticles (MSN), PMO nanoparticles (NPs) prepared from organo-bridged alkoxysilanes have tunable mesopores that could be utilized for many applications such as gas and molecule adsorption, catalysis, drug and gene delivery, electronics, and sensing; but unlike MSN, the diversity in chemical nature of the pore walls of such nanomaterials is theoretically unlimited. Thus, we expect that PMO NPs will attract considerable interest over the next decade. In this review, we will present a comprehensive overview of the synthetic strategies for the preparation of nanoscaled PMO materials, and then describe their applications in catalysis and nanomedicine. The remarkable assets of the PMO structure are also detailed, and insights are provided for the preparation of more complex PMO nanoplatforms.
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Affiliation(s)
- Jonas G Croissant
- Smart Hybrid Materials Laboratory, Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
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Ohtani Y, Nishinaka H, Hoshino S, Shimada T, Takagi S. Anisotropic photochemical energy transfer in clay/porphyrin system prepared by size-matching effect and Langmuir–Blodgett technique. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.05.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Emission amplification of Ru(bpy)32+ via energy transfer from pyrene derivatives on synthesized clay. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Mutsamwira S, Ainscough EW, Partridge AC, Derrick PJ, Filichev VV. DNA-Based Assemblies for Photochemical Upconversion. J Phys Chem B 2015; 119:14045-52. [DOI: 10.1021/acs.jpcb.5b07489] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saymore Mutsamwira
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
| | - Eric W. Ainscough
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
| | - Ashton C. Partridge
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
- Department
of Physics and School of Engineering, The University of Auckland, 20 Symonds Street, Auckland 1010, New Zealand
| | - Peter J. Derrick
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
- Department
of Physics and School of Engineering, The University of Auckland, 20 Symonds Street, Auckland 1010, New Zealand
| | - Vyacheslav V. Filichev
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
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Sohmiya M, Saito K, Ogawa M. Host-guest chemistry of mesoporous silicas: precise design of location, density and orientation of molecular guests in mesopores. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:054201. [PMID: 27877830 PMCID: PMC5070016 DOI: 10.1088/1468-6996/16/5/054201] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/25/2015] [Accepted: 06/26/2015] [Indexed: 05/25/2023]
Abstract
Mesoporous solids, which were prepared from inorganic-surfactant mesostructured materials, have been investigated due to their very large surface area and high porosity, pore size uniformity and variation, periodic pore arrangement and possible pore surface modification. Morphosyntheses from macroscopic morphologies such as bulk monolith and films, to nanoscopic ones, nanoparticles and their stable suspension, make mesoporous materials more attractive for applications and detailed characterization. This class of materials has been studied for such applications as adsorbents and catalysts, and later on, for optical, electronic, environmental and bio-related ones. This review summarizes the studies on the chemistry of mesoporous silica and functional guest species (host-guest chemistry) to highlight the present status and future applications of the host-guest hybrids.
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Affiliation(s)
- Minoru Sohmiya
- Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
| | - Kanji Saito
- Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
- Graduate School of Creative Science and Engineering, Department of Earth, Environment, and Resources Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
| | - Makoto Ogawa
- Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
- Graduate School of Creative Science and Engineering, Department of Earth, Environment, and Resources Engineering, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan
- Department of Chemical Engineering and Biomolecular Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong 21210, Thailand
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Mizoshita N, Inagaki S. Periodic Mesoporous Organosilica with Molecular-Scale Ordering Self-Assembled by Hydrogen Bonds. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505538] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Mizoshita N, Inagaki S. Periodic Mesoporous Organosilica with Molecular-Scale Ordering Self-Assembled by Hydrogen Bonds. Angew Chem Int Ed Engl 2015; 54:11999-2003. [DOI: 10.1002/anie.201505538] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 11/10/2022]
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Rohacova J, Sekine A, Kawano T, Tamari S, Ishitani O. Trinuclear and Tetranuclear Re(I) Rings Connected with Phenylene, Vinylene, and Ethynylene Chains: Synthesis, Photophysics, and Redox Properties. Inorg Chem 2015; 54:8769-77. [DOI: 10.1021/acs.inorgchem.5b01397] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jana Rohacova
- Department of Chemistry,
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama 322-0012, Japan
| | - Akiko Sekine
- Department
of Chemistry and Material Science, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-H60 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tsubasa Kawano
- Department
of Chemistry and Material Science, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-H60 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Sho Tamari
- Department
of Chemistry and Material Science, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-H60 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Osamu Ishitani
- Department of Chemistry,
Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1-NE-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi-shi, Saitama 322-0012, Japan
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35
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Li D, Zhang Y, Fan Z, Chen J, Yu J. Coupling of chromophores with exactly opposite luminescence behaviours in mesostructured organosilicas for high-efficiency multicolour emission. Chem Sci 2015; 6:6097-6101. [PMID: 30090223 PMCID: PMC6054107 DOI: 10.1039/c5sc02044a] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 07/20/2015] [Indexed: 11/21/2022] Open
Abstract
Aggregation-induced emission (AIE) and aggregation-caused quenching (ACQ) materials are important for various fluorescence-based applications but cannot easily collaborate because of their opposite luminescence behaviours. Here, we demonstrate a strategy to integrate AIE and ACQ chromophores in periodic mesoporous organosilicas (PMOs) for high-efficiency multicolour emission. Tetraphenylethene (TPE)-bridged AIE-PMOs are prepared as hosts to encapsulate ACQ dyes (e.g. RhB), which enables fine-tuning of ACQ@AIE-PMO emissions over the entire visible spectrum in the solid and film states. Significantly, high-quality white light is achieved with CIE coordinates of (0.32, 0.33) and a quantum yield of up to 49.6%. Because of their high stability and solution processability, the ACQ@AIE-PMOs can be applied in solid-state lighting and bioimaging. This design concept opens up new perspectives for developing high-performance luminescent materials by the combination of a wide variety of AIE and ACQ chromophores.
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Affiliation(s)
- Dongdong Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun , 130012 , P. R. China . .,Department of Materials Science , Jilin University , Changchun , 130012 , P. R. China
| | - Yuping Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun , 130012 , P. R. China .
| | - Zhiying Fan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun , 130012 , P. R. China .
| | - Jie Chen
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , 130022 , China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry , College of Chemistry , Jilin University , Changchun , 130012 , P. R. China .
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36
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Purchase RL, de Groot HJM. Biosolar cells: global artificial photosynthesis needs responsive matrices with quantum coherent kinetic control for high yield. Interface Focus 2015; 5:20150014. [PMID: 26052428 PMCID: PMC4410567 DOI: 10.1098/rsfs.2015.0014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
This contribution discusses why we should consider developing artificial photosynthesis with the tandem approach followed by the Dutch BioSolar Cells consortium, a current operational paradigm for a global artificial photosynthesis project. We weigh the advantages and disadvantages of a tandem converter against other approaches, including biomass. Owing to the low density of solar energy per unit area, artificial photosynthetic systems must operate at high efficiency to minimize the land (or sea) area required. In particular, tandem converters are a much better option than biomass for densely populated countries and use two photons per electron extracted from water as the raw material into chemical conversion to hydrogen, or carbon-based fuel when CO2 is also used. For the average total light sum of 40 mol m−2 d−1 for The Netherlands, the upper limits are many tons of hydrogen or carbon-based fuel per hectare per year. A principal challenge is to forge materials for quantitative conversion of photons to chemical products within the physical limitation of an internal potential of ca 2.9 V. When going from electric charge in the tandem to hydrogen and back to electricity, only the energy equivalent to 1.23 V can be stored in the fuel and regained. A critical step is then to learn from nature how to use the remaining difference of ca 1.7 V effectively by triple use of one overpotential for preventing recombination, kinetic stabilization of catalytic intermediates and finally generating targeted heat for the release of oxygen. Probably the only way to achieve this is by using bioinspired responsive matrices that have quantum–classical pathways for a coherent conversion of photons to fuels, similar to what has been achieved by natural selection in evolution. In appendix A for the expert, we derive a propagator that describes how catalytic reactions can proceed coherently by a convergence of time scales of quantum electron dynamics and classical nuclear dynamics. We propose that synergy gains by such processes form a basis for further progress towards high efficiency and yield for a global project on artificial photosynthesis. Finally, we look at artificial photosynthesis research in The Netherlands and use this as an example of how an interdisciplinary approach is beneficial to artificial photosynthesis research. We conclude with some of the potential societal consequences of a large-scale roll out of artificial photosynthesis.
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Affiliation(s)
- R L Purchase
- Biophysical Organic Chemistry/Solid State NMR , Leiden Institute of Chemistry , PO Box 9502, 2300 RA Leiden , The Netherlands
| | - H J M de Groot
- Biophysical Organic Chemistry/Solid State NMR , Leiden Institute of Chemistry , PO Box 9502, 2300 RA Leiden , The Netherlands
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37
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Jana A, Mondal J, Borah P, Mondal S, Bhaumik A, Zhao Y. Ruthenium bipyridyl tethered porous organosilica: a versatile, durable and reusable heterogeneous photocatalyst. Chem Commun (Camb) 2015; 51:10746-9. [DOI: 10.1039/c5cc03067f] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Ruthenium bipyridyl tethered mesoporous organosilica (Ru-POS) was developed as a versatile heterogeneous photoredox catalyst in several organic transformations.
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Affiliation(s)
- Avijit Jana
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - John Mondal
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Parijat Borah
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Sujan Mondal
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Jadavpur
- India 700032
| | - Asim Bhaumik
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Jadavpur
- India 700032
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- School of Materials Science and Engineering
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38
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Tamura K, Yamagishi A, Kitazawa T, Sato H. Harvesting light energy by iridium(iii) complexes on a clay surface. Phys Chem Chem Phys 2015; 17:18288-93. [DOI: 10.1039/c5cp02414e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The photon energy adsorbed by a donor molecule migrates among other donor molecules until it is captured by an acceptor.
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Affiliation(s)
- Kenji Tamura
- National Institute for Materials Science
- Tsukuba 305-0044
- Japan
| | | | - Takafumi Kitazawa
- Department of Chemistry
- Toho University
- Funabashi
- Japan
- Research Center for Materials with Integrated Properties
| | - Hisako Sato
- Department of Chemistry
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
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39
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Ogawa M, Saito K, Sohmiya M. Possible Roles of the Spatial Distribution of Organic Guest Species in Mesoporous Silicas to Control the Properties of the Hybrids. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402651] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Qian X, Fuku K, Kuwahara Y, Kamegawa T, Mori K, Yamashita H. Design and functionalization of photocatalytic systems within mesoporous silica. CHEMSUSCHEM 2014; 7:1528-1536. [PMID: 24828540 DOI: 10.1002/cssc.201400111] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/05/2014] [Indexed: 06/03/2023]
Abstract
In the past decades, various photocatalysts such as TiO2, transition-metal-oxide moieties within cavities and frameworks, or metal complexes have attracted considerable attention in light-excited catalytic processes. Owing to high surface areas, transparency to UV and visible light as well as easily modified surfaces, mesoporous silica-based materials have been widely used as excellent hosts for designing efficient photocatalytic systems under the background of environmental remediation and solar-energy utilization. This Minireview mainly focuses on the surface-chemistry engineering of TiO2/mesoporous silica photocatalytic systems and fabrication of binary oxides and nanocatalysts in mesoporous single-site-photocatalyst frameworks. Recently, metallic nanostructures with localized surface plasmon resonance (LSPR) have been widely studied in catalytic applications harvesting light irradiation. Accordingly, silver and gold nanostructures confined in mesoporous silica and their corresponding catalytic activity enhanced by the LSPR effect will be introduced. In addition, the integration of metal complexes within mesoporous silica materials for the construction of functional inorganic-organic supramolecular photocatalysts will be briefly described.
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Affiliation(s)
- Xufang Qian
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871 (Japan)
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41
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Yui T, Takeda H, Ueda Y, Sekizawa K, Koike K, Inagaki S, Ishitani O. Hybridization between periodic mesoporous organosilica and a Ru(II) polypyridyl complex with phosphonic acid anchor groups. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1992-1998. [PMID: 24447104 DOI: 10.1021/am405065a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new method for the hybridization of a ruthenium(II) polypyridyl complex ([Ru(bpy)2((CH2PO3H2)2-bpy)](2+) (RuP2(2+): bpy =2,2'-bipyridine; (CH2PO3H2)2-bpy =2,2'-bipyridine-4,4'di(metylphosphonic acid)) with biphenylene-bearing periodic mesoporous organosilica (Bp-PMO made from 4,4'bis(triethoxysilyl)biphenyl [(C2H5O)3Si-(C6H4)2-Si(OC2H5)3]) was developed. Efficient and secure fixation of the ruthenium(II) complex with methylphosphonic acid groups (RuP2(2+)) in the mesopores of Bp-PMO occurred. This method introduced up to 660 μmol of RuP2(2+) in 1 g of Bp-PMO. Two modes of adsorption of RuP2(2+) in the mesopores of Bp-PMO were observed: one is caused by the chemical interaction between the methylphosphonic acid groups of RuP2(2+) and the silicate moieties of Bp-PMO and the other is attributed to aggregation of the RuP2(2+) complexes. In the case of the former mode, adsorbed RuP2(2+) (up to 80-100 μmol g(-1)) did not detach from Bp-PMO after washing with acetonitrile, dimethylformamide, or even water. Emission from the excited biphenylene (Bp) units was quantitatively quenched by the adsorbed RuP2(2+) molecules in cases where more than 60 μmol g(-1) of RuP2(2+) was adsorbed, and emission from RuP2(2+) was observed. Quantitative emission measurements indicated that emission from approximately 100 Bp units can be completely quenched by only one RuP2(2+) molecule in the mesopore, and photons absorbed by approximately 400 Bp units are potentially accumulated in one RuP2(2+) molecule.
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Affiliation(s)
- Tatsuto Yui
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , 2-12-1-NE1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan
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La Ganga G, Nardo VM, Cordaro M, Natali M, Vitale S, Licciardello A, Nastasi F, Campagna S. A functionalized, ethynyl-decorated, tetracobalt(iii) cubane molecular catalyst for photoinduced water oxidation. Dalton Trans 2014; 43:14926-30. [DOI: 10.1039/c4dt01785d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new tetracobalt(iii)-oxo cubane 1 was prepared. The ethynyl groups do not affect the photocatalytic properties of 1, which, in contrast, appear to be improved.
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Affiliation(s)
- Giuseppina La Ganga
- Dipartimento di Scienze Chimiche
- Università di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLAR-CHEM)
- Messina, Italy
| | - Viviana Mollica Nardo
- Dipartimento di Scienze Chimiche
- Università di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLAR-CHEM)
- Messina, Italy
| | - Massimiliano Cordaro
- Dipartimento di Scienze Chimiche
- Università di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLAR-CHEM)
- Messina, Italy
| | - Mirco Natali
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- and SOLAR-CHEM
- Ferrara, Italy
| | - Stefania Vitale
- Dipartimento di Scienze Chimiche
- Università di Catania
- Catania, Italy
| | | | - Francesco Nastasi
- Dipartimento di Scienze Chimiche
- Università di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLAR-CHEM)
- Messina, Italy
| | - Sebastiano Campagna
- Dipartimento di Scienze Chimiche
- Università di Messina and Centro Interuniversitario per la Conversione dell'Energia Solare (SOLAR-CHEM)
- Messina, Italy
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