Nanochannels for supramolecular organization of luminescent guests

Brühwiler, Dominik; Calzaferri, Gion; Torres, Tomás; Ramm, Jan Hinrich; Gartmann, Nando; Dieu, Le-Quyenh; López‐Duarte, Ismael; Martínez‐Díaz, M. Victoria

doi:10.1039/b907308f

Cited by 144 publications

(155 citation statements)

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“…As a result, very high concentrations of well oriented molecules can be obtained [6,7,8]. In view of the well-known affinity of zeolites for water, stability of the hybrid materials upon hydration is particularly critical.…”

Section: Introductionmentioning

confidence: 99%

“…The inclusion of guest molecules into ordered one-dimensional channel systems is particularly intriguing, as the resulting host-guest compounds may exhibit peculiar new properties. These hybrid materials can be exploited in several research fields, as devices for solar energy harvesting, processing/storing of information, and advanced sensing technology for analytics and diagnostics on the nanoscale [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

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The high thermal stability of the synthetic zeolite K–L: Dehydration mechanism by in situ SR-XRPD experiments

Gigli

Arletti

Quartieri

et al. 2013

Microporous and Mesoporous Materials

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Thermally induced structural modifications of a synthetic zeolite L [K8.46 (Al8.35 Si27.53) O72 *17.91H2O, framework type LTL, s.g. P6/mmm, a =18.3367(1) and c = 7.5176(1) Å] were studied by temperature-resolved synchrotron X-ray powder diffraction. In the investigated temperature range (RT-814°C), neither structure breakdown nor phase transitions occurred. The largest unit cell deformation was observed between 100º and 240°C, accompanied by an increase and decrease of the a and c cell parameters, respectively. After complete water release, an inversion of the a and c parameter behavior was observed, while the cell volume continued to increase, although following a more flattened curve. Overall, in the investigated T range, a small cell volume increase of 0.7% was observed. The release of the five water molecules present in zeolite L started with the most weakly bonded one and occurred between 80º and 240°C. During dehydration the framework underwent minor rearrangements, which facilitated water release: the apertures of the main 12-ring and the 8-ring channels became more circular and the 6-membered rings became more hexagonal. The thermal expansion of zeolite L, very unusual for a non-siliceous zeolite, was interpreted and compared with previous data reported in literature for this porous material, and with the behavior of the synthetic phases ITQ-4 and CIT-5. HighlightsIn-situ dehydration of zeolite L was studied between RT and 814 °C. > The largest unit cell deformation was observed in correspondence of water release. > In the investigated T range, a small cell volume increase of 0.7% was observed. > Water release is facilitated by minor framework deformations. >The thermal expansion of zeolite L is very unusual for a non-siliceous zeolite. were studied by temperature-resolved synchrotron X-ray powder diffraction. In the investigated temperature range (RT-814°C), neither structure breakdown nor phase transitions occurred. The largest unit cell deformation was observed between 100º and 240°C, accompanied by an increase and decrease of the a and c cell parameters, respectively. After complete water release, an inversion of the a and c parameter behavior 3 was observed, while the cell volume continued to increase, although following a more flattened curve. Overall, in the investigated T range, a small cell volume increase of 0.7% was observed. The release of the five water molecules present in zeolite L started with the most weakly bonded one and occurred between 80º and 240°C. During dehydration the framework underwent minor rearrangements, which facilitated water release: the apertures of the main 12-ring and the 8-ring channels became more circular and the 6-membered rings became more hexagonal. The thermal expansion of zeolite L, very unusual for a nonsiliceous zeolite, was interpreted and compared with previous data reported in literature for this porous material, and with the behavior of the synthetic phases ITQ-4 and CIT-5. *Highlights (for review)

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The high thermal stability of the synthetic zeolite K–L: Dehydration mechanism by in situ SR-XRPD experiments

Gigli

Arletti

Quartieri

et al. 2013

Microporous and Mesoporous Materials

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“…This is a technical challenge in devices employing molecular chromophores, as they tend to aggregate and form quenching states as intermolecular spacing decreases. [13][14][15][16] As such, preventing dye aggregation is of key importance for designing fluorescent organic materials which employ FRET. 17,18 Perylene-diimides (PDIs) have found applications in light harvesting systems, organic electronic devices and LSCs due to their range of hues from red to violet, excellent solvent stability, high degree of chemical inertness, and superior thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Energy transfer in pendant perylene diimide copolymers

et al. 2016

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We report the synthesis, characterisation and polymerisation of two novel asymmetric perylene diimide acrylate monomers. The novel monomers form a sensitiser-acceptor pair capable of undergoing Förster resonance energy transfer, and were incorporated as copolymers with tert-butyl acrylate. The tert-butyl acrylate units act as spacers along the polymer chain allowing high concentrations of dye while mitigating aggregate quenching, leading to persistent fluorescence in the solid state at high concentrations of up to 0.3 M. Analysis of fluorescence kinetics showed efficient energy transfer between the optically dense sensitiser and the lower concentration acceptor luminophores within the polymer. This reduced reabsorption within the material demonstrates that the copolymer-scaffold energy transfer system has potential for use in luminescent solar concentrators.

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“…There is currently a renewed interest in this technology due to the availability of advanced materials (Ziessel et al, 2005;Currie et al, 2008;Mulder et al, 2009;Brühwiler et al, 2009;Earp et al, 2004) and sophisticated models to simulate the photon transport (Goldschmidt et al, 2008(Goldschmidt et al, , 2009. Major obstacles to be overcome are: limited stability of the luminescent species, high self-absorption, and poor knowledge of the parameters governing the efficiency 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 (Rowan et al, 2008).…”

Section: Introductionmentioning

confidence: 99%