The Preparation of Luminescent, Mechanochromic Molecular Containers from Non-Emissive Components: The Box Cations, [Au6 (Triphos)4 Br]5+ and [Au6 (Triphos)4 Br2 ]4.
Chemistry
; 25(15): 3849-3857, 2019 Mar 12.
Article
em En
| MEDLINE
| ID: mdl-30575132
ABSTRACT
Two new molecular boxes, the mono-bromo box [Au6 (Triphos)4 Br](SbF6 )5 â
6(CH2 Cl2 ), 4 mB, and the dibromo box, [Au6 (Triphos)4 Br2 â
H2 O](SbF6 )4 â
4(CH2 Cl2 ), 5 dB, have been prepared in crystalline form. Although constructed from non-luminescent components, both are strongly luminescent. Like its chloro counterpart, the mono-bromo box [Au6 (Triphos)4 Br](SbF6 )5 â
6(CH2 Cl2 ), 4 mB, is mechanochromic. Under grinding, it loses its luminescence. The bromo-bridged helicate, [(µ-Br){Au3 (Triphos)2 }2 ](CF3 SO3 )5 â
2(CH2 Cl2 ), 3µ-H, with a cation that is isomeric with the box [Au6 (Triphos)4 Br]5+ , has also been prepared and crystallographically characterized. Unlike its chloro analogue, [(µ-Br){Au3 (Triphos)2 }2 ](CF3 SO3 )5 â
2(CH2 Cl2 ) is not luminescent. Thus, the cation produced upon grinding may be the cation present in the bromo-bridged helicate, [(µ-Br){Au3 (Triphos)2 }2 ](CF3 SO3 )5 â
2(CH2 Cl2 ), 3µ-H. The dibromo box, [Au6 (Triphos)4 Br2 â
H2 O](SbF6 )4 â
4(CH2 Cl2 ), 5 dB, is not significantly mechanochromic.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2019
Tipo de documento:
Article