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Chem Commun (Camb) ; 49(75): 8398-400, 2013 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-23939386


Organic cages were identified as highly potent affinity materials for the tracing of γ-butyrolactone. The selectivity over ethanol and water is based on the interior functional groups which allow preferential hydrogen bonding to the target analyte.

Adv Mater ; 24(45): 6049-52, 2012 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-22941901


Porosity makes powerful affinity materials for quartz crystal microbalances. The shape-persistent organic cages and pores create superior affinity systems to existing ones for direct tracing of aromatic solvent vapors. A shape and size selectivity for the analytes is observed. These organic cages can be processed to thin films with highly reproducible sensing properties.

Gases/análise , Hidrocarbonetos Aromáticos/análise , Sistemas Microeletromecânicos/instrumentação , Compostos Orgânicos/química , Desenho de Equipamento , Análise de Falha de Equipamento , Miniaturização , Porosidade
Chem Commun (Camb) ; 48(79): 9861-3, 2012 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-22892821


The one-pot synthesis of an exo-functionalized [4 + 6] imine cage compound is introduced. The material derived from this compound is highly porous in its amorphous state with a specific surface area of 1037 m(2) g(-1) as determined by nitrogen sorption at 77 K.

Iminas/química , Adsorção , Temperatura Baixa , Conformação Molecular , Nitrogênio/química , Porosidade , Propriedades de Superfície , Termogravimetria
Chemistry ; 18(3): 836-47, 2012 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-22170731


The synthesis of various periphery-substituted shape-persistent cage compounds by twelve-fold condensation reactions of four triptycene triamines and six salicyldialdehydes is described, where the substituents systematically vary in bulkiness. The resulting cage compounds were studied as permanent porous material by nitrogen sorption measurements. When the material is amorphous, the steric demand of the cages exterior does not strongly influence the gas uptake, resulting in BET surface areas of approximately 700 m(2) g(-1) for all cage compounds 3 c-e, independently of the substituents bulkiness. In the crystalline state, materials of the same compounds show a strong interconnection between steric demand of the peripheral substituent and the resulting BET surface area. With increasing bulkiness, the overall BET surface area decreases, for example 1291 m(2) g(-1) (for cage compound 3 c with methyl substituents), 309 m(2) g(-1) (for cage compound 3 d with 2-(2-ethyl-pentyl) substituents) and 22 m(2) g(-1) (for cage compound 3 e with trityl substituents). Furthermore, we found that two different crystalline polymorphs of the cage compound 3 a (with tert-butyl substituents) differ also in nitrogen sorption, resulting in a BET surface area of 1377 m(2) g(-1), when synthesized from THF and 2071 m(2) g(-1), when recrystallized from DMSO.

Chem Commun (Camb) ; 48(9): 1281-3, 2012 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-22179299


A new tripodal ligand has been designed by connecting pyridine-based coordination units to a rigid triptycene moiety. Its reaction with europium(III) provides three-dimensional tetranuclear edifices, whose structural and photophysical characteristics as well as host-guest interactions are discussed in this contribution.