Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Study of chemical enhancement mechanism in non-plasmonic surface enhanced Raman spectroscopy (SERS).Category: nitriles-buliding-blocks.
Surface enhanced Raman spectroscopy (SERS) has been intensively investigated during the past decades for its enormous electromagnetic field enhancement near the nanoscale metallic surfaces. Chem. enhancement of SERS, however, remains rather elusive despite intensive research efforts, mainly due to the relatively complex enhancing factors and inconsistent exptl. results. To study details of chem. enhancement mechanism, we prepared various low dimensional semiconductor substrates such as ZnO and GaN that were fabricated via metal organic chem. vapor deposition process. We used three kinds of mols. (4-MPY, 4-MBA, 4-ATP) as analytes to measure SERS spectra under non-plasmonic conditions to understand charge transfer mechanisms between a substrate and analyte mols. leading to chem. enhancement. We observed that there is a preferential route for charge transfer responsible for chem. enhancement, i.e., there exists a dominant enhancement process in non-plasmonic SERS. To further confirm our idea of charge transfer mechanism, we used a combination of 2-dimensional transition metal dichalcogenide substrates and analyte mols. We also observed significant enhancement of Raman signal from mols. adsorbed on 2-dimensional transition metal dichalcogenide surface that is completely consistent with our previous results. We also discuss crucial factors for increasing enhancement factors for chem. enhancement without involving plasmonic resonance.
After consulting a lot of data, we found that this compound(4556-23-4)Category: nitriles-buliding-blocks can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts