The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Pyridine-4-thiol(SMILESS: SC1=CC=NC=C1,cas:4556-23-4) is researched.COA of Formula: C21H16N2. The article 《Long-Range Surface Plasmon Resonance Configuration for Enhancing SERS with an Adjustable Refractive Index Sample Buffer to Maintain the Symmetry Condition》 in relation to this compound, is published in ACS Omega. Let’s take a look at the latest research on this compound (cas:4556-23-4).
We propose a method to maintain the symmetry condition of the refractive index with respect to a dielec. buffer layer for a long-range surface plasmon resonance (LRSPR) configuration. The symmetry condition was maintained by changing the concentration of the ethylene glycol aqueous solution (sample buffer layer) to match the refractive index of the MgF2 film. Maintenance of the symmetry condition is necessary for exciting the LRSPR mode and increasing the elec. field intensity near the film. We used a four-phase Kretschmann resonance setup composed of a K9 prism, MgF2 film, Ag film, and sample buffer layer. The incident angle-dependent surface-enhanced Raman scattering (SERS) spectra were measured in the evanescent field. At the SPR angle, the SERS signal of the sym. configuration was 60 times higher than that of the conventional SPR configuration. Moreover, the elec. field penetration depth of the sym. long-range surface plasmon configuration (>1000 nm) was longer than that of their asym. counterparts. The enhancement factor of the sym. configuration was 8.6 x 107, which corresponded to the lowest detectable concentration for 4-mercaptopyridine, reaching 1.0 x 10-10 M at the resonance angle. Thus, the sym. LRSPR configuration has great potential for label-free sensing and detection of macromols. and biomols.
《Long-Range Surface Plasmon Resonance Configuration for Enhancing SERS with an Adjustable Refractive Index Sample Buffer to Maintain the Symmetry Condition》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(Pyridine-4-thiol)Application In Synthesis of Pyridine-4-thiol.
Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts