J. M. Ribó, Crusats, Farrera and L. Valero, Chem. Soc., Commun., 1994, 681 DOI: 10.1039/C39940000681

Different phoretic driving mechanisms have been proposed for the transport of solid or liquid microscopic inclusions in integrated chemical processes. It is now shown that a substrate was chemically modified with photosensitive self-assembled monolayers enables direct control assembly and large ensembles micrometer-sized particles drops were dispersed thin layer anisotropic fluid. This strategy separates particle driving, which realized by AC electrophoresis, steering, achieved elastic...

The aggregation in water of the free bases and diprotonated forms p-sulfonatophenyl phenyl meso-substituted porphyrins [sodium salts 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4), 5,10,15-tris(4-sulfonatophenyl)-20-phenylporphyrin (TPPS3), 5,10-bis(4-sulfonatophenyl)-15,20-diphenylporphyrin (TPPS2A), 5,15-bis(4-sulfonatophenyl)-10,20-diphenylporphyrin (TPPS2O), 5-(4-sulfonatophenyl)-10,15,20-diphenylporphyrin (TPPS1) 5,15-bis(4-sulfonatophenyl)porphine (DPPS2O)] was studied by...

The chirality of stepped sheetlike porphyrin aggregates, which are formed from achiral diprotonated sulfonato-substituted tetraphenylporphyrins, can be affected by the direction vortex during stirring or rotary evaporation (see scheme). This effect attributed to enhancement fluctuations that originate in aggregation. Thus, this sense, phenomenon could general for supramolecular systems obtained under kinetic control. Homoassociates title porphyrins acid solutions show spontaneous symmetry...

Association of streptavidin and two biotinylated polystyrene chains to form protein–polymer hybrids results in "giant amphiphiles" (see first step schematic representation). Functionality can be introduced by the complexation other molecules remaining binding sites (second step).

The tautomeric equilibria of 2-(4'-hydroxyphenylazo)benzoic acid (HABA) and 2-(3',5'-dimethyl-4'-hydroxyphenylazo)benzoic (3',5'-dimethyl-HABA) have been studied by a combination spectroscopic computational methods. For neutral HABA in solvents different polarity (toluene, chloroform, DMSO, DMF, butanol, ethanol) the azo tautomer (AT) is largely predominant. monoanionic HABA, hydrazone (HT) only detected species apolar such as toluene while AT water mixture both tautomers ethanol. Comparison...

Abstract Different phoretic driving mechanisms have been proposed for the transport of solid or liquid microscopic inclusions in integrated chemical processes. It is now shown that a substrate was chemically modified with photosensitive self‐assembled monolayers enables direct control assembly and large ensembles micrometer‐sized particles drops were dispersed thin layer anisotropic fluid. This strategy separates particle driving, which realized by AC electrophoresis, steering, achieved...

Riesenamphiphile entstehen bei der Bindung von zwei biotinylierten Polystyrolketten an Streptavidin (1. Schritt im Bild). Durch Komplexierung weiterer biotinylierter Moleküle die verbleibenden Bindungsstellen am lässt sich Funktionalisierungsgrad dieser Protein-Polymer-Hybride weiter erhöhen (2. Schritt).

Monovalent ligand 4 and divalent 8 have been synthesized, their thermodynamic parameters of complexation to avidin streptavidin analyzed in terms multivalent binding.

The effect of the addition β- and γ-cyclodextrin (β-CD, γ-CD) to water solutions ( D 2 O ) 4'-sulfonato derivatives meso-tetraphenylporphyrin (TPPS 4 , TPPS 3 2o 2a was studied by 1 H NMR at several temperatures. In all cases disaggregation porphyrin homoassociates detected, although in most it only partial. Nuclear Overhauser signals (ROESY) show that cyclodextrin inclusion complexes were formed with but not . These include sulfonatophenyl groups as guest, hydrophobic phenyl substituents....

Herein, we report and interpret a new chiral-selection phenomenon in the orientational ordering of soft-assembled domains that arise spontaneously Langmuir monolayers an azobenzene derivative at air/water interface. The chirality isolated sub-millimeter was unambiguously assessed by optical microscopy. selection process, quantified using enantiomeric excess parameter, controlled stirring aqueous subphase. We have studied dependence this process on rate handedness, time, temperature, initial...

Abstract 5(1 H )‐Pyrromethenones 3 have been reduced with sodium dithionite to give 5(2 )‐dipyrrylmethanones 4 in very good yields. Some of the conditions optimize this reduction studied.

Glycoluril derivatives with a carboxylic acid side chain have been synthesized and shown to bind both avidin streptavidin. Introduction of valerate in glycoluril led an increased binding proteins only when the group was bound N atom proper stereochemistry [(+)-enantiomer]. On other hand, introduction either on bridgehead carbon or opposite [(−)-enantiomer] decrease constant compared unsubstituted glycoluril. Direct spectrophotometric competitive titration each protein racemic ligand allowed...

The chirality of stepped sheetlike porphyrin aggregates, which are formed from achiral diprotonated sulfonato-substituted tetraphenylporphyrins, can be affected by the direction vortex during stirring or rotary evaporation (see scheme). This effect attributed to enhancement fluctuations that originate in aggregation. Thus, this sense, phenomenon could general for supramolecular systems obtained under kinetic control. Homoassociates title porphyrins acid solutions show spontaneous symmetry...