Optical spectroscopy of inorganic–organic host–guest nanocrystals organized as oriented monolayers

Huber, Stefan; Ruiz, Arantzazu Zabala; Li, Huanrong; Patrinoiu, Greta; Botta, Chiara; Calzaferri, Gion

doi:10.1016/j.ica.2006.06.008

Cited by 37 publications

(50 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The blue-emitting acridine dye and its methylated analogues possess an electronic transition moment perpendicular to the channels and therefore parallel to the surface. [9] After formation of the monolayer on glass, the zeolites were transferred using a patterned PDMS stamp to ITO with the strategy discussed above. The stripes obtained are of course fluorescent but, very interestingly, upon irradiation with polarized light, the color switches from blue to yellow.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7] In particular, zeolite L, which possesses unidirectional channels, has been shown to be a suitable material for supramolecular organization of different kinds of molecules. [8][9][10] The size (30 nm to several micrometers) and aspect ratio of L-type zeolite can be controlled synthetically. [11] Furthermore, it has been shown recently that they can be organized in monolayers on a silica substrate by chemical functionalization.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Microcontact Transfer Printing of Zeolite Monolayers

et al. 2009

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Microcontact Transfer Printing of Zeolite Monolayers

et al. 2009

View full text Add to dashboard Cite

show abstract

“…27 As a consequence, X-ray structural determinations on this kind of materials are extremely challenging: as a matter of fact, only few diffraction studies are available in the literature. 28,29 Some insight can be provided by optical spectroscopy of oriented dye-ZL monolayers 30,31 or by fluorescence microscopy approaches. 32,33,34 Since both techniques probe the orientation of the electronic transition dipole moment of the molecules with respect to the ZL channel axis, only indirect information on the actual geometrical features of supramolecular organization can be obtained.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2014

View full text Add to dashboard Cite

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.

show abstract

“…Zeolite L has a crystalline structure with internal sub-nanometre channels running through the crystal. Zeolite L assemblies are suitable hosts for fluorescent dyes (Megelski et al 2001;Maas et al 2003;Huber et al 2007). The fluorescent dye pyronine has been shown to intercalate into zeolite L crystals in a way that the individual dye molecules are aligned at defined angles within the crystal channels (Megelski et al 2001).…”

Section: Guest-host Systems: Fluorescent Dye Organized In Zeolitesmentioning

confidence: 99%

Multimode microscopy: spectral and lifetime imaging

Blum

Cesa

Escalante

et al. 2008

J. R. Soc. Interface.

View full text Add to dashboard Cite

Multimode microscopy exploits the measurement of multiple spectroscopic parameters to yield a wealth of spatially resolved spectroscopic detail about the sample under study. Here, we describe the realization of a multimode microscope capable of wide-field transmission, reflectivity and emission imaging. The instrument also incorporates confocal spectral and lifetime imaging enabling convenient high-content imaging of complex samples, allowing the direct correlation of the data obtained from the different modes. We demonstrate the versatility of this imaging platform by reviewing applications to the modulation of fluorescent protein emission by inverse opal photonic crystals, to the detection and visualization of J-aggregate coupling of small molecule dyes intercalated into nanochannels in zeolites and to the visualization of fluorescent proteins micropatterned onto surfaces. In all cases, the combination of different microspectroscopic modes is essential for the resolution of specific photophysical details of the complex systems in question.

show abstract

Optical spectroscopy of inorganic–organic host–guest nanocrystals organized as oriented monolayers

Cited by 37 publications

References 31 publications

Microcontact Transfer Printing of Zeolite Monolayers

Microcontact Transfer Printing of Zeolite Monolayers

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

Multimode microscopy: spectral and lifetime imaging

Contact Info

Product

Resources

About