Multifunctional behavior of molecules comprising stacked cytosine–AgI–cytosine base pairs; towards conducting and photoluminescence silver-DNA nanowires.
Metadatos
Afficher la notice complèteAuteur
Linares Ordóñez, Fátima; García-Fernández, Emilio; López-Garzón, F. Javier; Domingo García, María; Orte Gutiérrez, Ángel; Rodríguez Diéguez, Antonio; Galindo, Miguel A.Editorial
Royal Society of Chemistry
Date
2018-11-08Referencia bibliográfica
Linares, F. [et al.]. Multifunctional behavior of molecules comprising stacked cytosine–AgI–cytosine base pairs; towards conducting and photoluminescence silver-DNA nanowires. Chem. Sci., 2019, 10, 1126–1137. [doi:10.1039/c8sc04036b]
Patrocinador
Financial support from the Spanish MINECO (CTQ2017-89311- P), Junta de Andaluc´ıa (FQM-2293) and Universidad de Granada (Reincorporaci´on Plan Propio) are acknowledged. This study was partially supported by the “Unidad de Excelencia de Qu´ımica aplicada a Biomedicina y Medioambiente”, Universidad de Granada.Résumé
DNA molecules containing a 1D silver array may be applied for nanotechnology applications, but first their
conducting and photoluminescence behavior must be enhanced. Here we have synthesized and
characterized three new helical compounds based on stacked silver–mediated cytosine base pairs
[Ag(mC)2]X (mC ¼ N1-methylcytosine; X ¼ NO3 (1), BF4 (2) and ClO4 (3)), that contain uninterrupted
polymeric AgI chains that run through the center of the helixes, comparable to related silver-DNA
structures. The exposure of nanostructures of [Ag(mC)2]BF4 (2) to cold hydrogen plasma stimulates the
reduction of the prearranged AgI polymeric chains to metallic silver along the material. This solvent-free
reduction strategy leads to the compound [AgI(mC)2]X@Ag0 (2H) that contains uniformly well-distributed
silver metallic nanostructures that are responsible for the new conducting and photoluminescence
properties of the material. The presence of silver nanostructures alongside compound 2H has been
evaluated by means of X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, and X-ray powder
diffraction (XRPD). The conducting and photoactive properties of 2H were studied by electrostatic force
microscopy (EFM) and conducting-AFM (c-AFM), and photoluminescence microscopy (PL), respectively.
The results demonstrate that the presence of well-organized metallic silver nanoentities on the material
is responsible for the novel conductivity and photoactive properties of the material. This methodology
can be employed for the generation of multifunctional silver-DNA related materials with tailored properties.