Removal of crystal violet dye using a three-dimensional network of date pits powder/sodium alginate hydrogel beads: Experimental optimization and DFT calculation

Surface-enhanced Raman scattering nanotag of tunable ZIF-8 shell-encapsulated magnetic core-plasmonic satellites for disentangling chemical enhancement from electromagnetic enhancement

“…CT can be separated into two parts, photoinduced charge transfer (PICT) and ground state charge transfer (GSCT). Herein, there is resonant PICT from the HOMO of pure ZIF-8 (−7.43 eV) to the LUMO of CV (−6.732 eV) [39] under the irradiation of a 785 nm laser (1.58 eV). Additionally, GSCT between the HOMO of pure ZIF-8 (−7.43 eV) and the HOMO of CV (−8.253 eV) [39] can occur on the basis of energy matching.…”

“…Herein, there is resonant PICT from the HOMO of pure ZIF-8 (−7.43 eV) to the LUMO of CV (−6.732 eV) [39] under the irradiation of a 785 nm laser (1.58 eV). Additionally, GSCT between the HOMO of pure ZIF-8 (−7.43 eV) and the HOMO of CV (−8.253 eV) [39] can occur on the basis of energy matching. It should be noted that molecular transition between the HOMO and LUMO levels of CV requires an energy of 1.52 eV, which is close to that of the excitation laser (1.58 eV), leading to another resonant pathway of the SERS effect.…”