Photoluminescent and redox active periodic mesoporous organosilicas based on 2,7-diazapyrene

Balkus, Kenneth J.; Pisklak, Thomas J.; Hundt, Greg; Sibert, John W.; Zhang, Yangfeng

doi:10.1016/j.micromeso.2007.05.025

Cited by 21 publications

(16 citation statements)

References 94 publications

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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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Section: Introductionmentioning

confidence: 99%

Hierarchically structured biphenylene-bridged periodic mesoporous organosilica

Keilbach

Kienle

et al. 2011

J. Mater. Chem.

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“…For FMSN-2, the Stern-Volmer curves in the water solution for NB, 4-NT and PA can be well fitted to the exponential equations of This is because the addition of an electron-donating -CH 3 group will decrease the electron-withdrawing ability of the nitro group [38]. However, the quenching constant for picric acid is lower than that of 4-nitrotoluene and nitrobenzene might be due to the size effect.…”

Section: Resultsmentioning

confidence: 91%

Reprint of: “AIE luminogen functionalized mesoporous silica nanoparticles as efficient fluorescent sensor for explosives detection in water”

Miao

Zhang

et al. 2014

Microporous and Mesoporous Materials

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a b s t r a c tThe aggregation-induced emission (AIE) luminogen functionalized mesoporous silica nanoparticles (MSNs) were prepared via post-grafting 1,2-bis[4-(bromomethyl)phenyl]-1,2-diphenylethene (TPE-MB) on 3-aminopropyltriethoxysilane modified MSNs. The obtained materials combine the unique properties of the AIE luminogen and porous materials, and their emission wavelength can be changed from 467 to 527 nm by loading different amount of AIE molecules, showing an obvious red shift from blue light to yellow light. Such materials with well dispersibility in water are used as an efficient fluorescent sensor for the detection of explosives, including picric acid (PA), 4-nitrotoluene (4-NT), nitrobenzene (NB) in water. The obtained materials can be recycled by simply washing with proper solvents. The high sensitivity, increased chemical stability and recyclability of the AIE luminogen functionalized mesoporous silica nanoparticles promise that they can be used as an excellent fluorescence probe for future practical applications in explosives detection.

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“…Similar problems were encountered in the synthesis of PMOs bearing bulky diazapyrene ionic moieties (46), where the ordering disappeared when the diazapyrene loadings in the mixture were higher than 3%. 175 Shimada et al 176 successfully constructed a mesostructured film (thickness of ca. 4 mm) bearing cationic methylacridinium substructures (47) from a solution containing the pure organosilica precursor and Brij-76.…”

Section: Nitrogen and Sulphur Containing Bridged Pmosmentioning

confidence: 99%

Periodic Mesoporous Organosilicas: from simple to complex bridges; a comprehensive overview of functions, morphologies and applications

et al. 2013

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Periodic Mesoporous Organosilicas (PMOs) were developed in 1999 and are basically ordered templated mesoporous organosilicas, prepared by the combination of a surfactant as template and a silsesquioxane as the organosilica precursor. They were one of the first examples of the so-called "hybrid" organic/inorganic materials. In the years that followed, an amazing variety of functional groups, morphologies and applications has been developed. Some of these high-end applications, like low-k buffer layers in microelectronics, chiral catalysts, chromatographic supports, selective adsorbents and light-harvesting devices, have clearly shown their potential. In this review, we will give a comprehensive overview of all these different functionalities and applications that have been created for Periodic Mesoporous Organosilicas.

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Photoluminescent and redox active periodic mesoporous organosilicas based on 2,7-diazapyrene

Cited by 21 publications

References 94 publications

Hierarchically structured biphenylene-bridged periodic mesoporous organosilica

Hierarchically structured biphenylene-bridged periodic mesoporous organosilica

Reprint of: “AIE luminogen functionalized mesoporous silica nanoparticles as efficient fluorescent sensor for explosives detection in water”

Periodic Mesoporous Organosilicas: from simple to complex bridges; a comprehensive overview of functions, morphologies and applications

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