Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"resorcinarene"”.
-
Darstellung und Charakterisierung neuartiger C-Arylcalix(4)resorcinarene
… von aromatisch substituierten Calix(4)resorcinarenen behandelt. Im zweiten Kapitel werden die Grundlagen und Besonderheiten bei Calix(4)resorcinarenen angesprochen. Ein Überblick über die wichtigsten Verbindungen dieser Gruppe von Makrocyclen wird gegeben. Im Kapitel 3 werden …
-
Templating Metal Clusters via Resorcinarene- and Cyclen- Based Ligand Platforms
Polynuclear metal sites, found in both metalloenzymes and heterogeneous catalysts, play a critical role in small molecule activation by enabling multi-electron redox transformations through cooperative reactivity. One of the most compelling examples is biological nitrogen fixation, mediated by the …
-
Crystal engineering and sorption studies of cyclotriveratrylene and C-methylcalix[4]resorcinarene solvates
… apparently nonporous crystal. C-methylcalix[4]resorcinarene has been shown previously to form either channel-type structures or hexameric, spherical assemblies when crystallised from various alcohol molecules. The effect of the length of the alkyl chain of the solvent alcohol was studied. It …
-
Two New Resorcinarenes: A Pyridine & Acetic Acid Ligand for Metal Coordination and a Deep-Cavity Nitroquinoxaline Resorcinarene
Functionalizing the upper rim of resorcinarene-based cavitands allows a variety of compounds to be synthesized from a single scaffold. Using the upper-rim moieties as ligands for a variety of transition metal ions further increases the versatility of this class of host compounds. A new …
-
Advanced quartz crystal microbalance techniques applied to calixarene sensing membranes.
… in conjunction with a series of calix[4]resorcinarene sensing membranes have been successfully exploited for the detection of volatile organic solvents at vapour concentrations below their lower explosive level.The impedance analysis technique involves the measurement of the electrical …
-
Engineering of Light-Gated Artificial Ion Channels
… groups while the body part is formed by calix[4]resorcinarene. Key of controlling mechanism is the conformational change between cis and trans isomers, which is translated into movement of the gate. Light-gated artificial ion channels are aimed at eliminating of the stochastic mechanism of …
-
Synthesis and properties of novel macrocycles and related chromophoric benzenoid compounds
… macrocyclic compounds of interest are presented. Resorcinarenes with functionalized conjugated rigid rods made of oligo-p-phenylenes would lead to an entirely new class of functional, soluble, well-defined architectures impacting a variety of multidisciplinary research efforts. The general …
-
Detection of Biologically Important Molecules
… mechanism of the origin of color formation in resorcinarene macrocyclic compounds is explained in detail. The in situ acid formation from DMSO decomposition can cause the ring-opening of resorcinarenes followed by the condensation of resultant products to afford xanthene dyes. This discovery …
-
Molecular Encapsulation in Kinetically Trapped, Hydrogen-Bonded Pyrogallolarene Hexamers
<p>Pyrogallolarene and resorcinarene hexamers are hydrogen-bonded capsules that self-assemble in the solid state and can be studied in gaseous and solution phases. Guest loading within pyrogallolarene hexamers in solution has primarily been comprised of solvent molecules with some tertiary amines. …
-
The synthesis and studies of type II porous liquids
… 40%), a Noria isomer, specifically a resorcinarene trimer, “R3” (approximately 30%) and other unidentified oligomers (approximately 30%). Moreover, Noria has been characterised crystallographically as a diethyl ether solvate and its 1H NMR spectrum fully interpreted and assigned for …
-
Star Polymers and Dendrimers Based on Highly Functional Resorcin- and Pyrogallolarenes
In the frame of this thesis different calix[4]resorcin- and calix[4]pyrogallolarene derivatives were used as platform for the synthesis of novel star polymers and dendritic structures. The objectives of this work can be portrayed under the following points: First: Synthesis and modification of …