Category: 4556-23-4

Product Details of 4556-23-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration.

The authors propose a bimetallic waveguide-coupled surface plasmon resonance (WCSPR) configuration to enhance Raman scattering with an evanescent field excited using surface plasmons. The WCSPR configuration is a 5-phase Kretschmann resonance setup composed of a K9 prism/inner Ag film/MgF2 film/outer Ag film/H2O structure. Incident angle-dependent SERS spectra were measured in the evanescent field on this WCSPR configuration using an inhouse-built angle-dependent SPR-SERS microspectrometer. The SERS signal obtained under evanescent field excitation at the SPR angle was 20× higher than that collected using the conventional SPR configuration. Also the waveguide-coupled surface plasmons in this evanescent field-enhanced SERS spectroscopy setup had elec. field penetration depth of at least 500 nm, which is longer than the penetration depth for conventional surface plasmons. High-quality SERS signals can still be obtained after adding a 500. nm MgF2 film to the WCSPR configuration due to the deeper penetration depth. This advantage makes it possible to use Ag with a stronger elec. field enhancement capability instead of an inert noble metal such as Au in the experiment without worrying about the oxidation of Ag. The enhancement factor of this WCSPR configuration was 6.2 × 107. The lowest detectable concentration for the SERS signal of 4-mercaptopyridine reached 1.0 × 10-10 M using the WCSPR configuration. The WCSPR configuration has great potential for label-free sensing and detection of macromols. and biomols.

Here is a brief introduction to this compound(4556-23-4)Product Details of 4556-23-4, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Electric Literature of C5H5NS. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Noninvasive and Point-of-Care Surface-Enhanced Raman Scattering (SERS)-Based Breathalyzer for Mass Screening of Coronavirus Disease 2019 (COVID-19) under 5 min. Author is Leong, Shi Xuan; Leong, Yong Xiang; Tan, Emily Xi; Sim, Howard Yi Fan; Koh, Charlynn Sher Lin; Lee, Yih Hong; Chong, Carice; Ng, Li Shiuan; Chen, Jaslyn Ru Ting; Pang, Desmond Wei Cheng; Nguyen, Lam Bang Thanh; Boong, Siew Kheng; Han, Xuemei; Kao, Ya-Chuan; Chua, Yi Heng; Phan-Quang, Gia Chuong; Phang, In Yee; Lee, Hiang Kwee; Abdad, Mohammad Yazid; Tan, Nguan Soon; Ling, Xing Yi.

Population-wide surveillance of COVID-19 requires tests to be quick and accurate to minimize community transmissions. The detection of breath volatile organic compounds presents a promising option for COVID-19 surveillance but is currently limited by bulky instrumentation and inflexible anal. protocol. Here, we design a hand-held surface-enhanced Raman scattering-based breathalyzer to identify COVID-19 infected individuals in under 5 min, achieving >95% sensitivity and specificity across 501 participants regardless of their displayed symptoms. Our SERS-based breathalyzer harnesses key variations in vibrational fingerprints arising from interactions between breath metabolites and multiple mol. receptors to establish a robust partial least-squares discriminant anal. model for high throughput classifications. Crucially, spectral regions influencing classification show strong corroboration with reported potential COVID-19 breath biomarkers, both through experiment and in silico. Our strategy strives to spur the development of next-generation, noninvasive human breath diagnostic toolkits tailored for mass screening purposes.

Here is a brief introduction to this compound(4556-23-4)Electric Literature of C5H5NS, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Aralekallu, Shambhulinga; Kuntoji, Giddaerappa; Nemakal, Manjunatha; Mohammed, Imadadulla; Sannegowda, Lokesh Koodlur published the article 《Self-assembly of reactive difunctional molecules on nickel electrode》. Keywords: nickel electrode mercaptopyridine pyrazine.They researched the compound: Pyridine-4-thiol( cas:4556-23-4 ).COA of Formula: C5H5NS. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:4556-23-4) here.

Self-assembly of some reactive difunctional mols. such as mercaptopyridine, pyrazine, phenylene diisocyanide, amino ethanethiol and simple hexadecane thiol mol. have been formed on nickel surface. The adsorption behavior has been monitored by Quartz crystal microbalance with energy dissipation (QCM-D) and the results show that these mols. form thin rigid films on the surface. QCM-D results also reveal that nickel atoms on the surface are highly stable and do not undergo any corrosion or removal of nickel atoms from the surface during the adsorption process as observed with gold surface for these mols. Reflection-absorption IR spectral (RAIR) measurements were performed to study the mode of binding, order and packing of these mols. on nickel surface. Ellipsometric thickness results are comparable to theor. values and water contact angle measurements were carried out to study the change in the wettability and the observed values are slightly lesser than the data reported in literature for these mols. on gold surface. The charge transfer kinetics of these modified nickel surface have been studied by cyclic voltametry using a ferrocene redox probe in solution An increase in the peak potential separation of the redox species was observed with the modified surfaces compared to bare nickel which may be due to the insulating nature of these monolayers.

Here is a brief introduction to this compound(4556-23-4)COA of Formula: C5H5NS, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

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 Strain-Controlled Spin Transition in Heterostructured Metal-Organic Framework Thin Film.COA of Formula: C5H5NS.

Metal-organic framework (MOF) thin films have recently attracted much attention as a new platform for surface/interface research, where unconventional structural and phys. properties emerge. Among the many MOFs as candidates for fabrication of thin films, Hofmann-type MOFs {Fe(pz)[M(CN)4]} [pz = pyrazine; M = Ni (Nipz), M = Pt (Ptpz)] are attractive, because they undergo spin transitions with concomitant structural changes. Here, we demonstrate the first example of a strain-controlled spin transition in heterostructured MOF thin films. The spin transition temperature of Ptpz can be controlled in the temperature range of 300-380 K by fabricating a nanometer-sized heterostructured thin film with a Nipz buffer layer, where the smaller lattice of Nipz causes epitaxial compressive strain to the Ptpz layer. The fabricated heterostructured thin film exhibited a remarkable increase in spin transition temperature with a dynamic structural transformation, confirmed by variable-temperature (VT) X-ray diffraction and VT Raman spectroscopy. By verifying interfacial strain in a heterostructured thin film, we can rationally control the characteristics of MOFs-not only spin transition but also various phys. properties such as gas storage, catalysis, sensing, proton conductivity, and elec. properties, among others.

Here is a brief introduction to this compound(4556-23-4)COA of Formula: C5H5NS, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Application In Synthesis of Pyridine-4-thiol. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Mercaptopyridine-Functionalized Gold Nanoparticles for Fiber-Optic Surface Plasmon Resonance Hg2+ Sensing. Author is Yuan, Huizhen; Ji, Wei; Chu, Shuwen; Liu, Qiang; Qian, Siyu; Guang, Jianye; Wang, Jiabin; Han, Xiuyou; Masson, Jean-Francois; Peng, Wei.

As a highly toxic heavy metal ion, divalent mercuric ion (Hg2+) is one of the most widely diffused and hazardous environmental pollutants. In this work, a simple, portable, and inexpensive fiber-optic sensor based on surface plasmon resonance (SPR) effect was developed for Hg2+ detection, which takes advantage of 4-mercaptopyridine (4-MPY)-functionalized Au nanoparticles (Au NPs/4-MPY) as a signal amplification tag. Based on the coordination between Hg2+ and nitrogen in the pyridine moiety, we developed the sensor by self-assembling 4-MPY on Au film surfaces to capture Hg2+ and then introducing Au NPs/4-MPY to generate a plasmonic coupling structure with the configuration of nanoparticle-on-mirror. The coupling between localized SPR increased changes in SPR wavelength, which allowed highly sensitive Hg2+ sensing in aqueous solution The sensor exhibited superior selectivity for Hg2+ detection compared with other common metal ions in water. The sensor’s Hg2+ detection limit is 8 nM under optimal conditions. Furthermore, we validated the sensor’s practicality for Hg2+ detection in tap water samples and demonstrated its potential application for environmental water on-site monitoring.

Here is a brief introduction to this compound(4556-23-4)Application In Synthesis of Pyridine-4-thiol, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Pyridine-4-thiol( cas:4556-23-4 ) is researched.SDS of cas: 4556-23-4.Tian, Huihui; Li, Hongbian; Fang, Ying published the article 《Binary Thiol-Capped Gold Nanoparticle Monolayer Films for Quantitative Surface-Enhanced Raman Scattering Analysis》 about this compound( cas:4556-23-4 ) in ACS Applied Materials & Interfaces. Keywords: thiol capped gold nanoparticle monolayer film SERS; gold nanoparticle; malachite green; monolayer film; quantitative SERS; self-assembly. Let’s learn more about this compound (cas:4556-23-4).

Surface-enhanced Raman scattering (SERS) can provide fingerprint information of analyte mols. with unparalleled sensitivity. However, quant. anal. using SERS has remained one of the major challenges owing to the difficulty of obtaining reproducible SERS substrates with high-d. hotspots. Here, we report the rational design and fabrication of a binary thiol-capped gold nanoparticle (AuNP) monolayer film (MLF) as a substrate for highly sensitive and quant. SERS anal. The two thiol ligands chem. bonded to the AuNPs play different roles: dodecanethiol with a long alkyl chain controls the interparticle gaps and electromagnetic coupling among AuNPs and 4-mercaptopyridine works as a Raman internal standard (IS). The binary thiol-capped AuNPs can self-assemble into an ordered MLF with high-d. hotspots and uniformly distributed IS. The as-prepared MLF has been demonstrated as a reliable SERS substrate for quant. detection of fungicide malachite green in aqueous solution, with a high enhancement factor (up to 3.3 × 107) and a low detection limit (100 pM). Moreover, the MLF SERS substrate is flexible and transparent, which has enabled in situ detection of trace fungicide residues in a shrimp tissue.

Here is a brief introduction to this compound(4556-23-4)SDS of cas: 4556-23-4, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Liu, Dong; Ma, Hong-Xing; Fang, Ping; Mei, Tian-Sheng published the article 《Nickel-Catalyzed Thiolation of Aryl Halides and Heteroaryl Halides through Electrochemistry》. Keywords: diaryl sulfide preparation electrochem; aryl halide thiophenol thiolation nickel catalyst; electrocatalysis; electrosynthesis; nickel; thiolation; thiyl radicals.They researched the compound: Pyridine-4-thiol( cas:4556-23-4 ).Related Products of 4556-23-4. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:4556-23-4) here.

The Nickel-catalyzed electrochem. thiolation of aryl bromides and chlorides in the absence of an external base at room temperature using undivided electrochem. cells was reported for the synthesis of diaryl sulfides e.g., I.

Here is a brief introduction to this compound(4556-23-4)Related Products of 4556-23-4, if you want to know about other compounds related to this compound(4556-23-4), you can read my other articles.

Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts