Such a self‐assembly on a surface has not before been considered: Atomic force microscopy (AFM) was used as a “molecular ruler” to observe the direct assembly of coordination cages on self‐assembled monolayers (SAMs). A simple process was employed using microcontact‐printed (μCP) modified substrates. Metal‐induced self‐assembly of cavitand‐based cages on SAMs (see picture) was proven by means of electrochemistry, contact‐angle, and X‐ray photoelectron spectroscopy measurements. AFM measurements on individual molecules has enabled the observation of the coordination process on a single‐molecular level.
A new and efficient method of preparing 3,4-pyrrolediacetic diffraction, and miscibility tests. The planarity of the macrocyclic core constitutes the major structural requirement esters 3 is reported, together with their conversion, according to the Lindsey procedure, to a series of octa-and dodeca-for mesophase formation. The mesophase temperature range is controlled by the length of the side chains through the substituted porphyrins. This procedure, which consists of a palladium-catalysed oxidative alkoxycarbonylation of N-melting point and by the strength of π-π interactions among the cores through the clearing point. The same set of rules substituted dipropargylamine derivatives 1, works nicely for n-alkyl alcohols in the range C 1 to C 14 . The thermotropic governing porphyrin packing in the solid state can be employed to predict mesophase formation and organization behaviour of this series of porphyrins (28 compounds) has been investigated using polarization microscopy, DSC, X-ray in porphyrin octaestersAll the liquid-crystalline β-octasubstituted porphyrins ex- [a]
A new and efficient method of preparing 3,4‐pyrrolediacetic esters 3 is reported, together with their conversion, according to the Lindsey procedure, to a series of octa‐ and dodeca‐substituted porphyrins. This procedure, which consists of a palladium‐catalysed oxidative alkoxycarbonylation of N‐substituted dipropargylamine derivatives 1, works nicely for n‐alkyl alcohols in the range C1 to C14. The thermotropic behaviour of this series of porphyrins (28 compounds) has been investigated using polarization microscopy, DSC, X‐ray diffraction, and miscibility tests. The planarity of the macrocyclic core constitutes the major structural requirement for mesophase formation. The mesophase temperature range is controlled by the length of the side chains through the melting point and by the strength of π‐π interactions among the cores through the clearing point. The same set of rules governing porphyrin packing in the solid state can be employed to predict mesophase formation and organization in porphyrin octaesters
So wurde die Selbstorganisation auf einer Oberfläche noch nicht betrachtet: Die Kraftmikroskopie (AFM) wurde als „molekulares Lineal“ zur direkten Beobachtung der Selbstorganisation von Koordinationskäfigen in selbstorganisierten Monoschichten (SAMs) genutzt. Dabei fanden durch Mikrokontakt‐Drucken (μCP) modifizierte Substrate Verwendung. Die metallinduzierte Selbstorganisation von Cavitand‐Käfigen in den SAMs (siehe Bild) wurde durch elektrochemische, Kontaktwinkel‐ und Röntgen‐photoelektronenspektroskopische Messungen nachgewiesen. Durch AFM‐Untersuchungen an individuellen Molekülen konnte der Koordinationsprozess darüber hinaus auf der Ebene der Einzelmoleküle verfolgt werden.
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