When applying photochromic switches as functional units in light-responsive materials or devices, an often disregarded yet crucial property is their resistance to fatigue during photoisomerization. In the large family of diarylethene photoswitches, formation annulated isomer a byproduct reaction turns out prevent desired high reversibility for many different derivatives. To overcome this general problem, we have synthesized and thoroughly investigated behavior series diarylethenes, varying...

Posttranslational transfer of most precursor proteins into mitochondria is dependent on energization the mitochondria. Experiments were carried out to determine whether membrane potential or intramitochondrial ATP immediate energy source. Transfer in vitro precursors ADP/ATP carrier and ATPase subunit 9 isolated Neurospora was investigated. Under conditions where level high dissipated, import processing these did not take place. On other hand, taken up processed when low, but dissipated. We...

Subunit 9 (dicyclohexylcarbodiimide binding protein, 'proteolipid') of the mitochondrial F1F0-ATPase is a nuclearly coded protein in Neurospora crassa. It synthesized on free cytoplasmic ribosomes as larger precursor with an NH2-terminal peptide extension. The extension cleaved off after transport into mitochondria. A processing activity referred to peptidase that cleaves subunit and other proteins described characterized using cell-free system. Precursor vitro was incubated extracts...

Some rare indigo derivatives have been known for a long time to be photochromic upon irradiation with red light, which should advantageous many applications. However, the absence of strategies tune their thermal half-lives by modular molecular design as well lack proper synthetic methods prepare variety such molecules from parent dye so far precluded use. In this work, several protocols N-functionalization developed, and N-alkyl N-aryl prepared. By installation electron-withdrawing...

With great stacking comes conductivity: trifluoromethylated corannulenes are unexpectedly strong electron acceptors in solution. Even a polycrystalline film of 1,2-(F(3)C)(2)-corannulene (top structure and curve the plot) exhibits conductivity three orders magnitude higher than that pristine corannulene!

Self-assembled coordination cages can be employed as a molecular press, where the bowl-shaped guest corannulene (C20H10) is significantly flattened upon inclusion within hydrophobic cavity. This demonstrated by pairwise of with naphthalene diimide well dimer bromocorannulene inside box-like host. The compressed structures are unambiguously revealed single-crystal X-ray analysis.

We report the first POC, containing perfluorinated aromatic panels forming quickly and in high purity, despite low preorganization encoded starting materials.

Abstract Supramolecular coordination cages show a wide range of useful properties including, but not limited to, complex molecular machine‐like operations, confined space catalysis, and rich host–guest chemistries. Here we report the uptake release non‐covalently encapsulated, pharmaceutically‐active cargo from an octahedral Pd cage bearing polymer chains on each vertex. Six poly(ethylene glycol)‐decorated bipyridine ligands are used to assemble II 6 (TPT) 4 cage. The supramolecular...

We present the multiple post-modification of organic macrocycles and cages, introducing functional groups into two- three-dimensional supramolecular scaffolds bearing fluorine substituents, which opens up new possibilities in multi-step chemistry employing vast chemical space readily available isocyanates. The mechanism scope reaction that proceeds after isocyanate addition to benzylamine motif via an azadefluorination cyclisation (ADFC) were investigated using DFT calculations, a series...

Abstract This review provides an overview on recent advances in the novel field of electron-poor buckybowls. Whereas buckybowl chemistry has now been studied for more than two decades, only developments have drawn attention to this type compound. The syntheses these buckybowls and their distinct characteristic properties are described.

The experimental electron density of sumanene, C21H12, was extracted from a high resolution X-ray data set measured at 100 K and topologically analyzed. In addition to bond topological atomic properties, information about the distribution between adjacent molecules, which show close C⋯C approaches ∼3.4 Å within columnar π-stacks in crystal lattice, are discussed. A comparison is made with related corannulene molecule based also on analysis Electron Localizability Indicator (ELI-D) calculations.

Abstract Porous materials are important for various energy‐related technologies such as catalysis and separation. While porous organic cage compounds a rather recent addition to the field of materials, these discrete nanocavities have since emerged versatile functional‐materials platform, facilitated by solubility in common solvents. In contrast other frameworks, cages assembled first from modular building blocks solution then packed solid‐state next step. this minireview, we highlight...

Visible light can be used to shift dynamic covalent imine assemblies out of equilibrium. We studied a fluorinated azobenzene building block that reliably undergoes geometric isomerism upon irradiation. The was in combination with two different amines, ethylenediamine and R,R-1,2-diaminocyclohexane, create library macrocycles. Whereas the simple amine access polymeric state defined bowl-shaped macrocycle, chiral gives rich network macrocycles undergo both isomerisation as well interconversion...

We report the formation of metal-organic cage-crosslinked polymer hydrogels. To enable crosslinking cages and subsequent network formation, we used homodifunctionalized poly(ethylene glycol) (PEG) chains terminally substituted with bipyridines as ligands for Pd6 L4 corners. The encapsulation guest molecules into supramolecular self-assembled hydrogels, well ultrasound-induced disassembly release their cargo, is presented in addition to characterization by nuclear magnetic resonance (NMR)...

The self‐assemblies of red‐light switchable, functionalised ortho‐difluoroazobenzene isomers E‐/Z‐A with aliphatic diamines exhibit an alternating match/mismatch behaviour depending on the diamine’s chain length. While even‐numbered exclusively form imine macrocycles Z‐configured azobenzene isomer, odd‐numbered photoswitchable, defined macrocycles. formation Z,Z‐A2X2‐type was demonstrated butane‐1,4‐ (B) and hexane‐1,6‐diamine (H), while additionally E,E‐A2X2‐type were obtained propane‐1,3‐...

Abstract The syntheses and properties of corannulenes carrying electron‐withdrawing groups (F, CF 3 , C 6 F 5 ) are reported. Direct fluorination corannulene (C 20 H 10 was carried out with xenon difluoride, the crystal structure product confirmed by X‐ray analysis. Novel trifluoromethylated corannulenes, including versatile 4,9‐dibromo‐1,2‐bis(trifluoromethyl)corannulene, were obtained various established ring‐closing reactions. Besides use hexafluorobutyne for construction fluoranthenes...

N-Substituted imide-fused corannulenes can be generated from the corresponding tetramethylfluoranthenes. Syntheses, crystal structure and electronic properties are reported. The solid state of pentafluorophenyl derivative shows nearly perfect π-stacking in a convex–concave fashion is expected to possess useful properties.

A class of novel corannulene-derived ferrocene donor–acceptor systems has been synthesized by straight-forward Negishi-type coupling iodocorannulene. Their solid state structures have studied crystallographically and found to exhibit unique inter- intramolecular slipped stacking interactions.

Photoswitchable acid-base pairs, whose pKa values can be reversibly altered, are attractive molecular tools to control chemical and biological processes with light. A significant, light-induced change of three units in aqueous medium has been realized for two thermally stable states, which interconverted using UV green The modulation is based on incorporating a 3-H-thiazol-2-one moiety into the framework diarylethene photoswitch, loses heteroaromatic stabilization negatively charged...