SERS property of Co complex on boron nitride nanosheets/silver nanoparticles aggregates and photophysical characterisation of interactions among Co complex ion-exchanged within zirconium phosphate

Abstract

The Co(II) complex of [Co(bpy) 2 (NO 3 )]Cl¢3H 2 O, bpy = 2,2'-bipyridine, has been synthesised by the solution crystallisation method. The boron nitride nanosheets/silver nanoparticles/[Co(bpy) 2 (NO 3 )] Cl¢3H 2 O nanoaggregate was prepared in order to better analyse the adsorption orientation of the cobalt complex on the surface of silver nanoparticles. The result of the surface-enhanced Raman scattering measurement indicates that the molecular plane of the cobalt complex presents a tilted orientation with respect to the surface of silver nanoparticles. The luminescence property of [Co(bpy) 2 (NO 3 )] + two-dimensional arrangements within the layers of zirconium phosphate (ZrP) was also investigated. Steady-state luminescence spectra of the [Co(bpy) 2 (NO 3 )] + -exchanged ZrP materials show an increase in the luminescence intensity.

Understanding and Tuning Charge Dynamics in Carbon Nitride/Cobalt(II) Complex Hybrids for Enhanced Photocatalytic CO2 Reduction

“…1597, 1566, 1491, 1312, 1024, and 766 cm –1 , differ from those of the free bipyridine moiety, shown in Figure S6. According to the literature, it is readily to find that these Raman bands are assigned to the bpy ligands chelated to the cobalt­(II) ion, in agreement with other octahedrally coordinated bipyridine metal complexes. − This is in line with confirmed coordination between the metal center and the ligands; detailed assignments can be found in Figures S5 and S6 and their captions. For the coordinatively saturated Co­(bpy) 3 Cl 2 , six N atoms of the three bidentate bipyridine ligands octahedrally coordinate around the cobalt metal center, while the bpy-unsaturated Co­(bpy) 2 Cl 2 also has an octahedral structure, chelating four N atoms of bipyridine ligands and two flexible chelating sites by Cl – anions .…”