Synthesis and photoluminescence study of di-dendron dendrimers derived from mono-Boc-protected ethylenediamine cores.
Luminescence
; 26(4): 264-70, 2011.
Article
en En
| MEDLINE
| ID: mdl-20641045
ABSTRACT
This work is focused on the synthesis and optical properties of cone-shaped structural feature di-dendron polyamidoamine dendrimers up to the third generation with mono-Boc-protected ethylenediamine (EDA) as a core. Strong UV absorbance spectra and fluorescence spectra from di-dendron dendrimers with different terminal groups (-NH(2), -COOCH(3)) were studied under different conditions by varying experimental parameters such as concentration and pH. The optical density and fluorescence intensities increased when di-dendron dendrimers generation number increased from 0.5 to 3.0. It was confirmed that the concentration of di-dendron dendrimers plays an important role in fluorescence intensity. The increase in fluorescence intensity was linear in low concentration regions, but the intensity increased slowly in high concentration regions. The results also showed a rapid increase in fluorescence intensity at low pH. The formation of a fluorescence-emitting moiety had a close relationship to protonated tertiary amine groups in di-dendron dendrimers derived from mono-Boc-protected EDA cores. Furthermore, the formation of fluorescent chemical species was irreversible.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Carbonatos
/
Dendrímeros
/
Etilenodiaminas
/
Mediciones Luminiscentes
/
Antracenos
Idioma:
En
Revista:
Luminescence
Asunto de la revista:
BIOFISICA
/
BIOQUIMICA
Año:
2011
Tipo del documento:
Article
País de afiliación:
China