Pathway Diversity Leads to 2D-Nanostructure in Photo-triggered Supramolecular Assembly.
Chemistry
; 24(34): 8519-8523, 2018 Jun 18.
Article
em En
| MEDLINE
| ID: mdl-29604151
ABSTRACT
This Communication reports photo-triggered supramolecular assembly of a naphthalene-diimide (NDI) derivative, appended with a photo-labile ortho-nitrobenzyl (ONB)-ester protected carboxylic acid. Photo-irradiation produces the free COOH group which facilitates H-bonding-driven face-to-face stacking of the NDI chromophores producing an ultra-thin (height <2.0â
nm) two-dimensional (2D) nanosheet. In contrast, spontaneous supramolecular assembly of the same active monomer exhibits entirely different features such as uncontrolled growth, J-aggregation and fibrillar morphology. A completely different pathway for photo-triggered assembly is attributed to the dual function of the photo-caged pro-monomer in i)â
producing the carboxylic acid in controlled manner and ii)â
simultaneously inhibiting the spontaneous J-aggregation of the photo-generated monomers by ester-carboxylic acid H-bonding and in turn directing a distinct growth mechanism.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Índia