Inscriere cercetatori

Site nou !

Daca nu va puteti recupera parola (sau aveti alte probleme), scrieti-ne la pagina de contact. Situl vechi se gaseste la adresa old.ad-astra.ro

Facebook

Nucleobases modified azo-polysiloxanes, materials with potential application in biomolecules nanomanipulation

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Hurduc, N.; Enea, R.; Scutaru, D.; Sacarescu, L.; Donose, B.C. and Nguyen, A.V.

Editorial: Journal of Polymer Science Part A: Polymer Chemistry, 45, p.4240-4248, 2007.

Rezumat:

Here we show the possibility to obtain azopolysiloxanes modified with
nucleobases (adenine and thymine) with potential application in immobilization and
nanomanipulation of biomolecules. We propose a photofluidization mechanism based
on the concept of the conformational instability, which can explain the presence of
the fluid state below the glass transition. The azopolymers were characterized by 1H
NMR, GPC, DSC, DTG, UV spectroscopy, AFM analysis, and molecular simulations.
Depending on the type of nucleobase used, the surface of the azopolysiloxane film can
be structured in different ways under UV irradiation. Photoisomerization studies in
solid state were carried out to demonstrate the influence of the operational conditions
(presence or absence of natural visible light) on the polymeric film UV response.

Cuvinte cheie: atomic force microscopy (AFM), azo polymers, molecular modeling, polysiloxanes