is known about the synthesis pathways for pyrogallol ..
Jr.: Hydrocarbon binding inside a hexameric pyrogallolarene capsule.
Pyrogallolarenes as Frustrated Organic Solids - …
(b) McKinlay, R.M., Thallapally, P.K., Atwood, J.L.: Hexameric C-alkylpyrogallolarene molecular capsules sustained by metal-ion coordination and hydrogen bonds.
Resorcinarenes (RsC) and pyrogallolarenes (PgC) have received considerable attention due to their preference to form the all-cis cone-shaped (rccc) structure, thus allowing dimeric and hexameric nanocapsule formation through complementary and structurally distinct intermolecular hydrogen bonding interactions or metal coordination.
acylated phenyl pyrogallolarene ..
Current research covers aspects of clean technology which are directed towards the major challenges facing humanity in the 21st Century - in being able to gain accessto complex functional molecules and materials for tackling energy, health andenvironmental issues. This includes: (i) The use of patented thin film microfluidicsin controlling chemical reactivity and selectivity in organic and inorganic synthesis,controlling self assemble processes from small molecules to viruses,controlling kinetic versus thermodynamic metal organic frameworks (MOFs), controlling'top down' and 'bottom up' synthesis of nano-materials, and fabricating singlecell algal-graphene hybrid material for waste water treatment. (ii) Solar celltechnology based on the frustules of single cell diatoms. (iii) Utilisation ofbiomass in developing processes and products without generating waste. (iv)Applications of the compounds and materials in (i) - (iii), for example indevice technology, drug delivery and drug development, and waste watertreatment.
Combined scXRD and elemental analysis confirms the formation of [(PgC4)6Ga11.5Zn12.5]TlNO3 nanocapsule with Tl(I) ions disordered over six positions withinpyrogallolarene cavities (Figure ; ).
Pyrogallolarenes as artificial receptors for L-carnitine
The proposed metal coordination sites lead to at least three different environments for the pyrogallol -CH protons and two different environments for the linker group protons, as observed in the 1H NMR. For example, focusing on the PgC4Ga assemblies, because gallium interacts with only two of the three hydroxyl groups of a given pyrogallol, all four of the aryl protons of a given arene are non-equivalent (, bottom). The (at least) two different types of protons on the linker carbons arise for the same reason. If both gallium and zinc metals are present in the framework of the PgC4GaZn assembly, as suggested by the difference in the toroidal dimensions, the more complicated multiple proton environments would be expected.
The suggested structure of the PgC4Ga toroid has the 7 arenes in a boat conformation providing possible coordination sites for the 14 gallium ions between the flat pyrogallols on adjacent arenes and between opposite pyrogallols on the same arene. The sideways orientation of the 9 cone-shaped macrocyles in the PgC4GaZn assembly allows guest encapsulation and provides sufficient coordination sites between adjacent arenes for the 24 metals that stitch the toroidal assembly (). Among other possible interactions, the assemblies may also be stabilized by hydrogen-bonding between the pyrogallol hydroxyl groups and solvent and by coordinate covalent bonds between the metal and solvent.
Metal exchange study of pyrogallolarene based …
Crystal Structure of 2, 8, 14, 20-tert-Butylpyrogallolarene
Tetranitroresorcinarene: synthesis and structure of a new stereoisomer
research produced a pyrogallolarene by simply ..
Novel solution-phase structures of gallium-containing pyrogallolarene ..
Morphologies of branched-chain pyrogallolarenes in …
02/10/2013 · Pyridinium encapsulation within a novel cyano-footed pyrogallolarene ..
researchers produced pyrogallolarene simply by mixing ..
The synthesis and X-ray crystallographic structure of the first cobalt-seamed hexameric nanocapsule, [Co24(-pentylpyrogallolarene)6], is presented. The overall metal−ligand arrangement of this novel capsule is similar to that of previously reported copper- and nickel-seamed hexameric nanocapsules. However, this nanocapsule encloses a larger void space than those found in previous hexameric nanocapsules.
Zinc-seamed pyrogallolarene dimers as structural ..
127, 5714–5719 (2005) (c) Avram, L., Cohen, Y.J.: Self-recognition, structure, stability, and guest affinity of pyrogallolarene and resorcin arene capsules in solution.
Two cocrystals composed of a pyrogallolarene ..
The synthesis and X-ray crystallographic structure of the first cobalt-seamed hexameric nanocapsule, [Co24(-pentylpyrogallolarene)6], is presented. The overall metal–ligand arrangement of this novel capsule is similar to that of previously reported copper- and nickel-seamed hexameric nanocapsules. However, the title nanocapsule encloses a larger void space than those found in previous hexameric nanocapsules.
A calixarene is a macrocycle or cyclic oligomer based on a ..
125 16180–16181 (2003); (e) Avram, L., Cohen, Y.: Hexameric capsules of lipophilic pyrogallolarene and resorcinarene in solutions as probed by diffusion NMR: one hydroxyl makes the difference.
Colin Raston - Flinders University
Acid catalyzed condensation of pyrogallol and pivalaldehyde in refluxing aqueous ethanol afforded a pyrogallolarene derivative in good yield. Single crystal X-ray diffraction analysis revealed that a new calyx-like structure was formed under the reaction conditions.
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