Santos, Jonnatan J.; Toma, Sergio H.; Monezi, Natalia M.; Ando, Romulo A.; Corio, Paola; Araki, Koiti published their research in Inorganic Chemistry on August 5 ,2019. The article was titled 《Selecting the Mechanism of Surface-Enhanced Raman Scattering Effect using Shell Isolated Nanoparticles and an Oxo-Triruthenium Acetate Cluster Complex》.Recommanded Product: 112881-51-3 The article contains the following contents:
After >40 years, surface-enhanced Raman spectroscopy (SERS) stills attract much attention from chemists, not only because of the synthesis of plasmonic nanostructures but also due to the several simultaneous mechanisms which still remain unclear. One of the possibilities for a better understanding of the SERS mechanisms is the use of suitable inorganic complexes. The use of inorganic complexes makes it possible to observe the 2 main SERS mechanisms (electromagnetic and chem.) and to observe the intensification of Raman scattering due to the resonance Raman effect. The observation of these mechanisms was possible using an unpublished and interesting complex with 2 oxo-triruthenium acetate clusters and an Fe bis(terpyridine) in its structure (7 metals) and which interacted with bare Au nanoparticles and shell-isolated Au nanoparticles (SHIN), with a 1 nm SiO2 shell. The use of SHIN allowed quenching the SERS chem. mechanism and led to a spectrum where Fe-terpyridine peaks are absent and only the modes related to [Ru3O] center were observed (due to enhancement by resonance Raman, SERRS); it can be said that the shell-isolated nanoparticles enhanced resonance Raman spectroscopy (SHINERRS) is observed This approach led to a perfect selection of SERS mechanisms never seen before with any other mol./complex. As can be seen in the UV-visible spectrum, this complex has a strong band around 700 nm, which suggests that SiO2 shell enhances only surface-enhanced resonance Raman scattering, a long-distance phenomenon, different from chem. enhancement (a short-distance phenomenon). Along with the Raman spectroscopy results, cyclic voltammetry, UV-visible spectroelectrochem., resonance Raman (using 568 and 676 nm lasers), and d. functional theory calculations of this new Ru cluster are presented. The experimental part of the paper was very detailed, including the reaction process of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Recommanded Product: 112881-51-3)
4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Recommanded Product: 112881-51-3The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.