On the Significance of the Anchoring Group in the Design of Antenna Materials Based on Phthalocyanine Stopcocks and Zeolite L

López‐Duarte, Ismael; Dieu, Le-Quyenh; Dolamic, Igor; Martínez‐Díaz, M. Victoria; Torres, Tomás; Calzaferri, Gion; Brühwiler, Dominik

doi:10.1002/chem.201002210

Cited by 33 publications

(40 citation statements)

References 78 publications

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“…Organized particle assemblies of this kind have been obtained with microporous materials such as zeolite L. [28][29][30][31][32][33] The variety of zeolite L particle assemblies reported in the literature can be ascribed to the tunable size and aspect ratio of zeolite L crystals, 34,35 as well as to sophisticated methods for the selective functionalization of the channel entrances. [36][37][38][39] Methods for the selective functionalization of the external surface and of the pore surface of ASNCs that also enable the placement of functional groups at the pore entrances have been reported, 21,22 but concepts for the adjustment of the particle size and aspect ratio have not been developed.…”

Section: Introductionmentioning

confidence: 99%

Tuning the aspect ratio of arrays of silica nanochannels

Zucchetto

Brühwiler

2015

RSC Adv.

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Arrays of silica nanochannels (ASNCs) are ordered mesoporous silica particles with hexagonal prismatic shape. The entrances of the well-defined one-dimensional nanochannels are located on the base surfaces of the hexagonal prisms. The aspect ratio of the micrometer-sized particles (length-to-diameter ratio) can be tuned in the range of 0.8 to 2.2 by the addition of co-ions (K + and Ca 2+ ) to the hexadecyltrimethylammonium bromide (CTAB) templated synthesis and by an adjustment of the relative amounts of silica precursor (tetraethoxysilane) and CTAB. The length of the nanochannels can be varied between 2 and 9 µm. Co-ions thereby not only improve the regularity of the hexagonal prismatic particle shape, but also affect the diameter of the nanochannels, which lies at approximately 2.6 nm (with K + as co-ion) and 3.2 nm (with Ca 2+ as co-ion).

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Section: Introductionmentioning

confidence: 99%

Tuning the aspect ratio of arrays of silica nanochannels

Zucchetto

Brühwiler

2015

RSC Adv.

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“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] These are currently investigated for applications in different fields, ranging from sensing in analytical chemistry, biology, and diagnostics, [15][16][17][18] to applications in optical and electro optical devices [3][4][5][19][20][21] and extending to solar energy utilization, e.g. in the form of luminescent solar concentrators.…”

Section: Introductionmentioning

confidence: 99%

First-principles simulation of the absorption bands of fluorenone in zeolite L

Zhou

Wesołowski

Tabacchi

et al. 2013

Phys. Chem. Chem. Phys.

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The absorption spectrum of fluorenone in zeolite L is calculated from first-principles simulations. The broadening of each band is obtained from the explicit treatment of the interactions between the chromophore and its environment in the statistical ensemble. The comparison between the simulated and measured spectra reveals the main factors affecting the spectrum of the chromophore in hydrated zeolite L. Whereas each distinguishable band is found to originate from a single electronic transition, the bandwidth is determined by the statistical nature of the environment of the fluorenone molecule. The K + Á Á ÁOQC motif is retained in all conformations. Although the interactions between K + and the fluorenone carbonyl group result in an average lengthening of the CQO bond and in a redshift of the lowest energy absorption band compared to gas phase or non-polar solvents, the magnitude of this shift is noticeably smaller than the total shift. An important factor affecting the shape of the band is fluorenone's orientation, which is strongly affected by the presence of water.The effect of direct interactions between fluorenone and water is, however, negligible.

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“…This has been discussed in detail recently. [15,[47][48] Scheme 1. Length of PR149, its ETDM, and dense packing in a ZL channel.…”

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Designing Dye–Nanochannel Antenna Hybrid Materials for Light Harvesting, Transport and Trapping

et al. 2011

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We discuss artificial photonic antenna systems that are built by incorporating chromophores into one-dimensional nanochannel materials and by organizing the latter in specific ways. Zeolite L (ZL) is an excellent host for the supramolecular organization of different kinds of molecules and complexes. The range of possibilities for filling its one-dimensional channels with suitable guests has been shown to be much larger than one might expect. Geometrical constraints imposed by the host structure lead to supramolecular organization of the guests in the channels. The arrangement of dyes inside the ZL channels is what we call the first stage of organization. It allows light harvesting within the volume of a dye-loaded ZL crystal and also the radiationless transport of energy to either the channel ends or center. One-dimensional FRET transport can be realized in these guest-host materials. The second stage of organization is realized by coupling either an external acceptor or donor stopcock fluorophore at the ends of the ZL channels, which can then trap or inject electronic excitation energy. The third stage of organization is obtained by interfacing the material to an external device via a stopcock intermediate. A possibility to achieve higher levels of organization is by controlled assembly of the host into ordered structures and preparation of monodirectional materials. The usually strong light scattering of ZL can be suppressed by refractive-index matching and avoidance of microphase separation in hybrid polymer/dye-ZL materials. The concepts are illustrated and discussed in detail on a bidirectional dye antenna system. Experimental results of two materials with a donor-to-acceptor ratio of 33:1 and 52:1, respectively, and a three-dye system illustrate the validity and challenges of this approach for synthesizing dye-nanochannel hybrid materials for light harvesting, transport, and trapping.

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On the Significance of the Anchoring Group in the Design of Antenna Materials Based on Phthalocyanine Stopcocks and Zeolite L

Cited by 33 publications

References 78 publications

Tuning the aspect ratio of arrays of silica nanochannels

Tuning the aspect ratio of arrays of silica nanochannels

First-principles simulation of the absorption bands of fluorenone in zeolite L

Designing Dye–Nanochannel Antenna Hybrid Materials for Light Harvesting, Transport and Trapping

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