This Account presents recent advances in understanding how and why dilute solutions/sols of low-molecular-mass organic gelators (LMOGs) undergo microscopic phase separation to form self-assembled fibrillar networks molecular organogels. Concepts are illustrated structurally at the subnanometer (molecular) several millimeter (bulk) length scales dynamically over time that follow assembly supersaturated into gel phases. Examples include both complicated (ALSmolecules with aromatic, linking,...

The properties of a series organogels consisting urea or thiourea derivative with one two n-alkyl substitutuents at the nitrogen atoms (a low molecular-mass organogelator (LMOG)) and an organic liquid are described. They include N,N'-dimethylurea, LMOG lowest molecular mass (M(W) 88) we aware of. efficiencies LMOGs, based diversity liquids gelated, minimum amount required for gelation room temperature, temporal thermal stabilities gels formed, have been investigated as function number,...

The infrared spectra of rare earth acetates have been studied to examine the metal-acetate bonding. thermal decomposition as well lead and copper investigated in detail by employing thermogravimetric analysis differential analysis. Thermal calcium dicarboxylates (malonate sebacate) t.g.a. d.t.a. Infrared also studied. Preliminary results on products reported.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of Silyl- and Germylmetallic CompoundsM. V. George, Donald J. Peterson, Henry GilmanCite this: Am. Chem. Soc. 1960, 82, 2, 403–406Publication Date (Print):January 1, 1960Publication History Published online1 May 2002Published inissue 1 January 1960https://pubs.acs.org/doi/10.1021/ja01487a038https://doi.org/10.1021/ja01487a038research-articleACS PublicationsRequest reuse permissionsArticle Views1152Altmetric-Citations109LEARN ABOUT THESE...

A self-assembled photoactive antenna system containing a gold nanoparticle as the central nanocore and appended fullerene moieties photoreceptive hydrophobic shell is designed by functionalizing with thiol derivative of fullerene. Upon suspension fullerene-functionalized nanoparticles (Au−S−C60) in toluene we observe formation 5−30 nm diameter clusters. The ease suspending these nanoassemblies organic solvents allows us to probe excited state interactions spectroscopic methods. quenching...

Rapid and isothermal (at room temperature) uptake of CO2 by solutions or, in some cases, organogels comprised a primary or secondary aliphatic amine (1) an organic liquid leads to situ chemical transformation the corresponding alkylammonium alkylcarbamate (2) based gels. Chemical reversibility is demonstrated removal from 2-based gels upon gentle heating presence nitrogen. This general strategy for reversible self-assembly disassembly molecular aggregates relying on initiation termination...

Thirteen members of a new class low molecular-mass organogelators (LMOGs), amides, and amines based on (R)-12-hydroxystearic acid (HSA; i.e., (R)-12-hydroxyoctadecanoic acid) the properties their gels have been investigated by variety structural thermal techniques. The abilities these LMOGs, molecules with primary secondary amide amine groups ammonium carbamate salt 1-aminooctadecan-12-ol, to gelate wide range organic liquids ascertained. Their gelating efficiencies are compared those HSA...

Reversible, room-temperature ionic liquids, amidinium carbamates, are made by addition of carbon dioxide to mixtures an aliphatic amidine and primary amine. The systems can be cycled repeatedly sequential exposure CO2 N2. An example the utility such is provided.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry of o-nitrobenzaldehyde and related studiesM. V. George J. C. ScaianoCite this: Phys. Chem. 1980, 84, 5, 492–495Publication Date (Print):March 1, 1980Publication History Published online1 May 2002Published inissue 1 March 1980https://pubs.acs.org/doi/10.1021/j100442a007https://doi.org/10.1021/j100442a007research-articleACS PublicationsRequest reuse permissionsArticle Views886Altmetric-Citations107LEARN ABOUT THESE METRICSArticle Views...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemical cycloadditions of 1,3-dipolar systems. I. Additions N,C-diphenylsydnone and 2,5-diphenyltetrazoleM. V. George Chanabasappa S. AngadiyavarCite this: J. Org. Chem. 1971, 36, 12, 1589–1594Publication Date (Print):June 1, 1971Publication History Published online1 May 2002Published inissue 1 June 1971https://pubs.acs.org/doi/10.1021/jo00811a004https://doi.org/10.1021/jo00811a004research-articleACS PublicationsRequest reuse...

A series of low molecular-mass organogelators (LMOGs) with conjugated diyne units, R−C⋮CC⋮C−R', has been synthesized from 10,12-pentacosadiynoic acid. R is a long alkyl chain and R' short or containing an amide ester group. The gelation efficiencies these LMOGs the parent acid (as assessed by variety liquids gelled, amount gelator needed for gelation, temporal thermal stabilities gels) differ widely according to nature substituents. An LMOG substituent much more efficient than corresponding...

A series of organogelator salts has been prepared from n-alkylamines by the rapid in situ and isothermal (at room temperature) uptake a neutral triatomic molecule, CO2, NO2, SO2, or CS2. The organogels have examined differential scanning calorimetry, optical microscopy, X-ray diffraction methods. efficiency each gelator assessed on bases diversity liquids it gelled, minimum amount required for gelation, temporal thermal stabilities its gels. Thus, alkylammonium alkylcarbamates, amine−CO2...

A new class of low molecular-mass organogelators (LMOGs), N-alkyl perfluoroalkanamides, F(CF2)nCONH(CH2)mH, is described. The molecules are designed to exploit the incompatibilities their three molecular parts, and results demonstrate that this strategy can be used tune aggregation gel stability. gelating properties these LMOGs have been examined in a wide variety organic liquids (including alkanes, alcohols, toluene, n-perfluorooctane, CCl4, DMSO) as function perfluoroalkyl chain lengths by...

Herein we report (3+2) cycloaddition reactions of halogenated donor‐acceptor cyclopropanes (HDACs) as surrogates for cyclopropenes. Upon reaction with a variety 2π‐components, followed by elimination generates the unsaturated five‐membered ring products. A series HDACs were shown to be effective in thioketones. Five further used showcase broad applicability these cyclopropene surrogates. Kinetic studies allowed proposal plausible mechanism this reaction.

Herein we report (3+2) cycloaddition reactions of halogenated donor‐acceptor cyclopropanes (HDACs) as surrogates for cyclopropenes. Upon reaction with a variety 2π‐components, followed by elimination generates the unsaturated five‐membered ring products. A series HDACs were shown to be effective in thioketones. Five further used showcase broad applicability these cyclopropene surrogates. Kinetic studies allowed proposal plausible mechanism this reaction.

A novel approach to the synthesis of 2-thiabicyclo[2.1.1]hexane scaffold has been described. The method utilizes two highly reactive species: bicycle[1.1.0]butanes (BCBs) and thioketones. Their high reactivity enabled formation...

Fullerene−bridge−aniline dyad and the model fulleropyrrolidine compound form stable, optically transparent clusters in mixtures (3:1) of acetonitrile toluene. Ground- excited-state properties are compared with their corresponding monomeric forms. Clustering as well exhibits a red-shifted emission maximum (λmax ∼ 738 nm) to forms 714 nm). The electron transfer from appended donor moiety parent fullerene core cluster is evident decreased (∼80%) fluorescence yield. formation radical anion...