Edge-on Langmuir-Blodgett multilayers derived from disc-shaped multiyne mesogens

Reiche, J.; Dietel, R.; Janietz, Dietmar; Lemmetyinen, Helge; Brehmer, L.

doi:10.1016/0040-6090(93)90389-7

Cited by 36 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, the molecular area is generally of the order of 200± 600 2 . By contrast, molecules with stronger core±core attractions, such as truxenes, triphenylenes [7] or pentaalkynes [11] show an ªedge-onº arrangement, with characteristic molecular areas of 70±100 2 . In some cases, these the P±A measurements have been supplemented and confirmed by spectroscopic or other probes.…”

mentioning

confidence: 92%

See 1 more Smart Citation

Structural Studies of Langmuir Films of Disc-Shaped Molecules

Mindyuk

Heiney²

1999

Adv. Mater.

View full text Add to dashboard Cite

mentioning

confidence: 92%

“…[15] The X-ray or NR profiles are determined by the Fourier transform of the density gradient normal to the interface, and are often analyzed by modeling the film as a set of thin slabs with adjustable thickness or density. GIXRD provides [11,12].…”

mentioning

confidence: 99%

Structural Studies of Langmuir Films of Disc-Shaped Molecules

Mindyuk

Heiney²

1999

Adv. Mater.

View full text Add to dashboard Cite

“…The edge-on orientation is preserved during the formation of periodical multilayers by the LB technique [23,24]. More recently we reported on photoalignment of low molar mass nematic-discotic pentaalkynyl-benzene derivatives on an azobenzene sub-layer [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…We have shown that benzene centred nematic-discotic multiynes substituted with one terminal polar group form two-dimensional monolayer assemblies at the air/ water interface with the flat aromatic planes oriented perpendicular to the surface [22][23][24]. The edge-on orientation is preserved during the formation of periodical multilayers by the LB technique [23,24].…”

Section: Introductionmentioning

confidence: 99%

Surface controlled orientation of a novel star‐shaped discotic oligomesogen

Grafe

Jung²,

Sainova

et al. 2005

Liquid Crystals Today

View full text Add to dashboard Cite

The alignment behaviour of a nematic-columnar phase forming discotic liquid crystal was explored on various substrates. The mesogen employed was a new star-shaped monodisperse oligomesogen characterized by three flat radial pentaalkynylbenzene moieties grafted to a central benzene linking unit via flexible alkyl spacers. It is shown that suitable polyimide orientation layers along with the mesomorphic properties give rise to a tilted alignment of the disc-shaped pentayne cores. The photoluminescence spectra of oriented films were lineary polarized upon isotropic excitation and unambigiously reveal that, beside the tilted alignment of the rigid cores, the molecular directors of the discotic building blocks preferentially are oriented along the rubbing direction of the orientation layer. The three-dimensional ordering is stable even at room temperature due to the glass forming properties of the applied discotic mesogen.

show abstract

“…Real selfassembling systems, however, may have different characteristics, with localised attractions acting between certain moieties of the molecular building-blocks due, e.g. to the presence of polar side groups [23][24][25]. To incorporate such behaviour here, the energy parameter function of the disc-sphere interactions has been augmented by the introduction of one or more 'hot-spot' regions on the rims of the discs by using a disc-sphere interaction of the form…”

Section: Model and Simulation Detailsmentioning

confidence: 99%

Self-assembly of twisted, multi-sheet aggregates

et al. 2018

View full text Add to dashboard Cite

Hierarchical self-assembly underpins much of the diversity of form and function seen in soft systems, yet the pathways by which they achieve their final form are not always straightforwardintermediate steps, kinetic effects and finite sizes of aggregates all influence the self-assembly pathways of these systems. In this paper, we use molecular dynamics simulations of binary mixtures of spheres and ellipsoidal discs to investigate the self-assembly of anisotropic aggregates with internal structures. Through this, the full aggregation pathways of spontaneously chiral, multi-bilayer and multi-layer assemblies have been tracked and characterised via a semi-qualitative analysis. This includes the unambiguous identification of first-, second-and third-generation hierarchical assemblies within a single simulation. Given the significant challenge of tracking full aggregation pathways in experimental systems, our findings strongly support the notion that molecular simulation has much to contribute to improving our understanding of hierarchical self-assembling systems. ARTICLE HISTORY

show abstract

Edge-on Langmuir-Blodgett multilayers derived from disc-shaped multiyne mesogens

Cited by 36 publications

References 15 publications

Structural Studies of Langmuir Films of Disc-Shaped Molecules

Structural Studies of Langmuir Films of Disc-Shaped Molecules

Surface controlled orientation of a novel star‐shaped discotic oligomesogen

Self-assembly of twisted, multi-sheet aggregates

Contact Info

Product

Resources

About