Time, Space, and Spectrally Resolved Studies on J-Aggregate Interactions in Zeolite L Nanochannels

Busby, Michael; Blum, Christian; Tibben, Marc; Fibikar, Sandra; Calzaferri, Gion; Subramaniam, Vinod; Cola, Luisa De

doi:10.1021/ja801178p

Cited by 100 publications

(95 citation statements)

References 37 publications

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“…This leads to the building of artificial antennas. [17][18][19] With reference to dyes and clay minerals, enhanced second-order linearity was evidenced for crystal violet in zirconium phosphate and methylene blue on laponite. In summary, control of the numbers, locations, stability, orientation and interactions of the organic molecules in the internal and external surface of mineral tubes is key in the challenge to develop well-defined unitary bricks with useful properties.…”

Section: Introductionmentioning

confidence: 98%

The Incorporation of Indigo Molecules in Sepiolite Tunnels

Ovarlez¹,

Giulieri²,

Chaze³

et al. 2009

Chemistry A European J

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Evidence for access of molecules the size of acetone or pyridine to the intracrystalline tunnels of nanofibre clay (sepiolite) has indicated formation of a new type of organic-inorganic nanocomposites. However, the introduction of larger molecules has been a recurring problem. It is now agreed that for indigo, the molecules are located on the external surface and at the ends of the fibres, thus blocking access to internal tunnels. We claim, however, that it is possible for indigo molecules to access the internal channels of sepiolite. FTIR and XRD analyses have provided evidence for folding of the sepiolite structure preheated at high temperature (above 350 degrees C). By comparison, we have shown that for indigo/sepiolite mixtures treated in the same conditions, no change in the crystalline structure of the sepiolite is observed, and that blue samples, related to Maya blue, with indigo molecules incorporated deeply enough into sepiolite to prevent folding of the tunnels, can be obtained. NMR, FTIR and thermal analysis confirm the interaction of indigo with the water coordinated to magnesium(II) and located inside the internal and external channels of sepiolite. Two other hypotheses are excluded; we show both that zeolitic water is not blocked in the tunnels by indigo, and that if thermal decomposition products of indigo can be formed, they are in a minority.

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Section: Introductionmentioning

confidence: 98%

The Incorporation of Indigo Molecules in Sepiolite Tunnels

Ovarlez¹,

Giulieri²,

Chaze³

et al. 2009

Chemistry A European J

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“…The red-shift of the spectra can be attributed to the formation of J-type aggregates in the interlayer galleries of the LDH, which is similar to the behavior of dyes intercalated into zeolite nanochannels. [16] The PCL properties of BTZB/ZnAl-LDHs (Figure 2 b and Figure S4, S5 in the Supporting Information) are less marked than that those of BTZB/MgAl-LDH, indicating that the chemical composition of the LDH layers has an influence on the PCL behavior of the interlayer BTZB.…”

mentioning

confidence: 94%

Layered Host–Guest Materials with Reversible Piezochromic Luminescence

Yan

et al. 2011

Angew Chem Int Ed

166

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“…Since the nanometric diameter channels of zeolites may induce an anisotropic arrangement of photoactive molecules, the resulting host-guest materials show outstanding energy transfer capabilities, mimicking the functionalities of the antenna systems of living plants. 17,18,19,20,21 This is a key requirement for the fabrication of increasingly sophisticated optical devices which might open novel pathways in areas such as solar energy harvesting, information processing and nanodiagnostics. 22,23,24 Zeolite L (ZL) is a very appealing host matrix for the realization of one dimensional photoactive domains.…”

Section: Introductionmentioning

confidence: 99%

Close-Packed Dye Molecules in Zeolite Channels Self-Assemble into Supramolecular Nanoladders

et al. 2014

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A tough challenge in nanomaterials chemistry is the determination of the structure of multicomponent nanosystems. Dye-zeolite L composites are building blocks of hierarchically organized multifunctional materials for technological applications. Supramolecular organization inside zeolite L nanochannels, which governs electronic properties, is barely understood. This is especially true for confined close-packed dye molecules, a regime not investigated in applications yet and that might have great potential for future development in this field. Here we realize for the first time composites of zeolite L with maximally-packed fluorenone molecules and elucidate their structure by integrated multi-technique analyses. By IR, thermogravimetric and X-ray diffraction we establish the maximum degree of dye loading obtained (1.5 molecules per unit cell) and by modeling we reveal that at these conditions fluorenone molecules form quasi 1-D supramolecular nanoladders running along the zeolite channels. Spatial and morphological control provided by the nanoporous matrix combined with a complex blend of strong dye-zeolite and weaker dye-dye van der Walls interactions lie at the origin of this unique architecture, which is also stabilized by the hydrogen bond network of co-adsorbed water molecules surrounding the dye nanoladder and penetrating between its rungs.

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Time, Space, and Spectrally Resolved Studies on J-Aggregate Interactions in Zeolite L Nanochannels

Cited by 100 publications

References 37 publications

The Incorporation of Indigo Molecules in Sepiolite Tunnels

The Incorporation of Indigo Molecules in Sepiolite Tunnels

Layered Host–Guest Materials with Reversible Piezochromic Luminescence

Close-Packed Dye Molecules in Zeolite Channels Self-Assemble into Supramolecular Nanoladders

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