65636-25-1

Upstream product

• 37859-24-8 2-(4-bromophenyl)acetyl chloride 
• 100-44-7 benzyl chloride 
• 17051-04-6 dibenzyl cadmium 
• 14062-25-0 Ethyl 4-bromophenylacetate 
• 103-82-2 phenylacetic acid 
• 1878-68-8 2-(4-bromophenyl)-acetic acid 

Downstream Products

• 19829-56-2 4,4'-dibromobibenzyl 
• 14310-24-8 1-bromo-4-(2-phenylethyl)benzene 
• 103-29-7 1,1'-(1,2-ethanediyl)bisbenzene 
• 190013-95-7 Acetic acid [1-benzyl-2-(4-bromo-phenyl)-eth-(E)-ylidene]-hydrazide 
• 1352050-03-3 1,2,3,-tris(4-pyridyl)-hexaphenylbenzene 
• 1352050-02-2 2,3,4-triphenyl-5-(4-(4-pyridyl)phenyl)cyclopenta-2,4-dienone 
• 1352050-01-1 1-phenyl-3-(4-(4-pyridyl)phenyl)propan-2-one 
• 190014-00-7 5-benzyl-5-(4-bromobenzyl)-2-methoxy-2-methyl-Δ³-1,3,4-oxadiazoline 
• 23923-20-8 4,5-Diphenyl-2,3-bis-(p-brom-phenyl)-(αβ)-cyclopentadien-(2,4)-on-(1) 
• 23923-21-9 5-Phenyl-2,3,4-tris-(p-brom-phenyl)-(αββ)-cyclopentadien-(2,4)-on-(1) 

Relevant academic research and scientific papers

MULTIFUNCTIONAL MONOMERS AND THEIR USE IN MAKING CROSS-LINKED POLYMERS AND POROUS FILMS

This invention is a monomer comprising at least two dienophile groups and at least two ring structures which ring structures are characterized by the presence of two conjugated carbon-to-carbon double bonds and the presence of a leaving group L, wherein L is characterized that when the ring structure reacts with a dienophile in the presence of heat or other energy sources, L is removed to form an aromatic ring structure. This invention is also curable oligomers and polymers and highly cross-linked polymers made with such monomers. Moreover, this invention is a method of making porous films by combining such monomers or their oligomers with a porogen, curing the polymer and removing the porogen.

Stepwise effective molarities in porphyrin oligomer complexes: Preorganization results in exceptionally strong chelate cooperativity

Complexes of zinc porphyrin oligomers with multivalent ligands can be denatured by adding a large excess of a monodentate ligand, such as quinuclidine. We have used denaturation titrations to determine the stabilities of the complexes of a cyclic zinc-porphyrin hexamer with multidentate ligands with two to six pyridyl coordination sites. The corresponding complexes of linear porphyrin oligomers were also investigated. The results reveal that the stepwise effective molarities (EMs) for the third through sixth intramolecular coordination events with the cyclic hexamer are extremely high (EM = 10 2-103 M), whereas the values for the linear porphyrin oligomers are modest (EM ? 0.05 M). The speciation profiles for the denaturation reactions demonstrate that intermediate species are not significantly populated and that these equilibria are well described by a highly cooperative two-state model.

Photolysis of 5,5-dibenzyl-Δ3-1,3,4-oxadiaiolines

Photolysis of dibenzyl-Δ3-1,3,4-oxadiazolines (3) in the presence of dimethyl acetylenedicarboxylate (DMAD) gives only modest yields of the expected symmetrical 3,3-dibenzylcyclopropenes (4), but these are accompanied by more than six by-products, including unsymmetrical cyclopropenes, methylenecyclopropanes, and various pyrazoles. The origin of this array of products can be explained by a series of steps starting with photolysis of 3 to form a diazoalkane that undergoes 1,3-dipolar cycloaddition to DMAD, generating a 3H-pyrazole as initial product. The latter is further photolyzed to a symmetrical cyclopropene in competition with benzyl group migration by thermal 1,5-sigmatropic or ion-pair rearrangement to afford a 4H-pyrazole. The 4H-pyrazole in turn undergoes photolysis to an unsymmetrical cyclopropene, which rearranges to a methylenecyclopropane. The 4H-pyrazole also undergoes autoxidation, in the presence of air, to afford a benzoyl-4H-pyrazole. Additionally, in competition with rearrangement, the various pyrazoles lose a benzyl group or a methoxycarbonyl group to afford pyrazoles with one less substituent.

Micellar Systems as ''Supercages'' for Reactions of Geminate Radical Pairs. Magnetic Effects

The photochemistry of dibenzyl ketone (DBK) and other molecules capable of producing benzyl radicals and substituted benzyl radicals has been investigated in micellar systems.The cage effect (percent of unscavengeable radical pairs produced by photolysis) was measured under a variety of conditions, and the results are compared with those obtained in homogeneous organic solvents.For example, parameters such as mean occupancy of ketone, detergent type and concentration, O2 concentration, additives, temperature, applied magnetic field, and pressure have been varied and investigated as to their influence on the magnitude of cage effect.In addition to modifying its environment, structural modification of the DBK by incorporation of 2H and 13C isotopes, hydrophobic groups, and heavy atoms was performed to investigate the impact of these variations on the cage effect in micellar systems.Isotopic substitution of 2H or 13C leads to results on both the quantum yields for reactions and on the percent cage that were consistent with expectations of magnetic isotope effects.Hydrophobic groups substituted in the 4-position of DBK were found to cause a substantial increase in the cage effect and yet retain the magnetic-field-dependent character found in the parent DBK.Incorporation of Br in the 4-position of DBK was found to enhance the cage effect but at the same time cause the cage effect to become magnetic field independent.Substitution of α-naphthyl for phenyl in DBK also produced magnetic-field-independent behavior, in addition to a dramatic decrease in the efficiency of photolysis.