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1.
Langmuir ; 33(7): 1646-1654, 2017 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-28125880

RESUMO

The behavior of compound 2 [1,3,5-tri(2,2'-bipyridin-5-yl)benzene] with three bipyridine units arranged in a star geometry is investigated in the presence and absence of Ni(ClO4)2. Its properties at the air-water interface as well as after transfer onto a solid substrate are studied by several techniques including Brewster angle microscopy, X-ray reflectivity, neutron reflectivity, X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, and atomic force microscopy combined with optical microscopy. It is found that compound 2 within the monolayers formed stays almost vertical at the interface and that at high Ni2+/2 (Ni2+/2 = 4000, 20'000) ratios two of the three bipyridine units of 2 are complexed, resulting in supramolecular sheets that are likely composed of arrays of linear metal-organic complexation polymers.

2.
Chem Commun (Camb) ; 50(10): 1195-7, 2014 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-24326342

RESUMO

A novel approach towards the asymmetric synthesis of N-stereogenic molecules via double aza-Michael addition was developed. The diastereomeric ratio can be increased by a thermodynamically controlled isomerization mechanism. Simple separation and functionalization of the products afford N-stereogenic compounds in high enantiomeric purity.


Assuntos
Compostos Aza/química , Compostos Aza/síntese química , Catálise , Estrutura Molecular , Estereoisomerismo
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