Light Harvesting by a Periodic Mesoporous Organosilica Chromophore

Inagaki, Shinji; Ohtani, Osamu; Goto, Yasutomo; Okamoto, Ken‐ichi; Ikai, Masamichi; Yamanaka, Ken; Tani, Takao; Okada, Tadashi

doi:10.1002/anie.200900266

Cited by 221 publications

(182 citation statements)

References 40 publications

(73 reference statements)

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“…A range of PMOs with different fluorescent chromophores distributed into both the framework (as a bridging groups) and mesopore channels (as a dye dopant) has been reported. 51 The prepared PMOs were reported to exhibit lightharvesting antenna properties with almost no loss of energy transfer.…”

Section: Pmo Materials As Hosts For Drug and Biomoleculesmentioning

confidence: 99%

Periodic mesoporous organosilicas for advanced applications

2014

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In 1999, three groups independently developed a novel class of organic-inorganic nanocomposites known as periodic mesoporous organosilicas (PMOs). The organic functional groups in the frameworks of these solids allow tuning of the surface properties and modification of the bulk properties of the material. This paper provides a comprehensive overview of PMOs and discusses their different functionalities, morphology and applications, such as catalysis, drug delivery, sensing, optics, electronic devices, environmental applications (gas sensing and gas adsorption), biomolecule adsorption and chromatography for which PMOs have been used over the past 5 years.

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Section: Pmo Materials As Hosts For Drug and Biomoleculesmentioning

confidence: 99%

Periodic mesoporous organosilicas for advanced applications

2014

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“…12 A number of studies on biphenyl-bridged PMOs in powder form have been published. [16][17][18][19][20][21][22][23] Biphenyl-bridged PMO was also reported to exhibit excellent light-harvesting antenna properties 24 and to be applied to photocatalysis systems for hydrogen evolution from water 25 and CO 2 reduction to CO.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically structured biphenylene-bridged periodic mesoporous organosilica

Keilbach

Kienle

et al. 2011

J. Mater. Chem.

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Novel composites of highly ordered and stable biphenyl-bridged periodic mesoporous organosilica (PMO) materials confined within the pores of anodic alumina membranes (AAM) were successfully synthesized by evaporation-induced self-assembly (EISA). 4,4 0 -Bis(triethoxysilyl)biphenyl (BTEBP) was used as a precursor in combination with the ionic surfactant cetyltrimethylammonium bromide (CTAB) or triblock-copolymer F127 as structure-directing agents. The resulting mesophases were characterized by small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM).With ionic CTAB as a structure directing agent, samples with a mixture of the 2D-hexagonal columnar and a lamellar mesophase were obtained within the AAM channels. When using the nonionic surfactant F127, mesophases with a 2D-hexagonal circular structure were formed in the AAM channels. Additionally, a cubic Im 3m phase could also be obtained with the same nonionic surfactant after the addition of lithium chloride to the precursor solution. The stability of both the circular and cubic biphenylene-bridged PMO against calcination temperatures of up to 250 C was confirmed by NMR spectroscopy. Nitrogen sorption in the porous composite membrane shows typical type IV isotherms and narrow pore size distributions. All the biphenyl PMO/AAM composites show fluorescence due to the existence of biphenyl chromophores in the stable organosilica framework.

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“…Since each dye has a specific absorption region and is different from other dyes, appropriate combinations of these dyes and/or with other molecules have been investigated. The method for (ii) involves dye assembly, which can be done by (a) covalent bonds [13][14][15], (b) supramolecular interaction between dyes [16][17][18][19], or (c) supramolecular interaction between dyes and inorganic materials [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…While efficient lightharvesting energy transfer is difficult in method (c), some works have reported excellent results with metalorganic frameworks [21] or periodic mesoporous organosilica [22]. My approach toward efficient artificial LHSs is based on method (c), in which clay nanosheets are used as the host material to build the 2D dye assembly using host (nanosheet)-guest (molecule) interactions.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of supramolecular 2D assembly of functional dyes toward artificial light-harvesting systems

Ishida

2014

Pure and Applied Chemistry

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Abstract:In recent years, excellent research has revealed that light-harvesting systems (LHSs) are composed of beautifully aligned chlorophyll molecules; the regulated alignment of chlorophylls is responsible for the efficient and selective light-harvesting energy transfer processes in purple bacteria. This finding led to the construction of a regularly arranged assembly of functional dyes as a step toward fabricating artificial LHSs. While most approaches toward the construction of dye assemblies have depended on molecular interactions such as covalent, coordination, and hydrogen bonds, my approach involves guest-host interactions using an inorganic nanosheet as the host material. This short review presents the construction of a 2D dye assembly and its effective utilization in artificial light-harvesting applications. Owing to the highly stable and uniform 2D alignment of functional dyes on inorganic nanosheets, nearly 100 % singlet-singlet energy transfer and efficient light-harvesting were achieved. I believe that the results presented herein will contribute to the construction of efficient photochemical reaction systems in supramolecular host-guest assemblies, which may facilitate the realization of artificial photosynthesis.

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Light Harvesting by a Periodic Mesoporous Organosilica Chromophore

Cited by 221 publications

References 40 publications

Periodic mesoporous organosilicas for advanced applications

Periodic mesoporous organosilicas for advanced applications

Hierarchically structured biphenylene-bridged periodic mesoporous organosilica

Manipulation of supramolecular 2D assembly of functional dyes toward artificial light-harvesting systems

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