TY - JOUR
T1 - Plasmon Chemistry on Ag Nanostars
T2 - Experimental and Theoretical Raman/SERS Study of the Pesticide Thiacloprid Bond Cleavage by the Plasmon Deactivation Effect
AU - Celis, Freddy
AU - Aracena, Andrés
AU - García, Macarena
AU - Segura del Río, Rodrigo
AU - Sanchez-Cortes, Santiago
AU - Leyton, Patricio
N1 - Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society
PY - 2023/6/27
Y1 - 2023/6/27
N2 - Silver nanoparticles (AgNPs) were synthetized and employed in surface-enhanced Raman scattering measurements to study the chemical behavior when thiacloprid (Thia) interacts with the surface of Ag nanospheres (AgNSp) and Ag nanostars (AgNSt) upon excitation of the system with a 785 nm laser. Experimental results show that the deactivation of the localized surface plasmon resonance induces structural changes in Thia. When AgNSp are used, it is possible to observe a mesomeric effect in the cyanamide moiety. On the other hand, when AgNSt are employed, it promotes the cleavage of the methylene (−CH2−) bridge in Thia to produce two molecular fragments. To support these results, theoretical calculations based on topological parameters described by the atoms in molecules theory, Laplacian of the electron density at the bond critical point (∇2ρ BCP), Laplacian bond order, and bond dissociation energies were made, confirming that the bond cleavage is centered at the −CH2- bridge in Thia.
AB - Silver nanoparticles (AgNPs) were synthetized and employed in surface-enhanced Raman scattering measurements to study the chemical behavior when thiacloprid (Thia) interacts with the surface of Ag nanospheres (AgNSp) and Ag nanostars (AgNSt) upon excitation of the system with a 785 nm laser. Experimental results show that the deactivation of the localized surface plasmon resonance induces structural changes in Thia. When AgNSp are used, it is possible to observe a mesomeric effect in the cyanamide moiety. On the other hand, when AgNSt are employed, it promotes the cleavage of the methylene (−CH2−) bridge in Thia to produce two molecular fragments. To support these results, theoretical calculations based on topological parameters described by the atoms in molecules theory, Laplacian of the electron density at the bond critical point (∇2ρ BCP), Laplacian bond order, and bond dissociation energies were made, confirming that the bond cleavage is centered at the −CH2- bridge in Thia.
UR - http://www.scopus.com/inward/record.url?scp=85163464675&partnerID=8YFLogxK
U2 - 10.1021/acsomega.3c01878
DO - 10.1021/acsomega.3c01878
M3 - Article
AN - SCOPUS:85163464675
SN - 2470-1343
VL - 8
SP - 22887
EP - 22898
JO - ACS Omega
JF - ACS Omega
IS - 25
ER -