Category: 4556-23-4

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Electron-enriched thione enables strong Pb-S interaction for stabilizing high quality CsPbI3 perovskite films with low-temperature processing, the main research direction is caesium lead iodide perovskite thin film crystallization fabrication.COA of Formula: C5H5NS.

Cesium lead iodide (CsPbI3) perovskite is a promising photovoltaic material with a suitable bandgap and high thermal stability. However, it involves complicated phase transitions, and black-phase CsPbI3 is mostly formed and stabilized at high temperatures (200-360°C), making its practical application challenging. Here, for the first time, we have demonstrated a feasible route for growing high quality black-phase CsPbI3 thin films under mild conditions by using a neutral mol. additive of 4(1H)-pyridinethione (4-PT). The resulting CsPbI3 thin films are morphol. uniform and phase stable under ambient conditions, consisting of micron-sized grains with oriented crystal stacking. With a range of characterization experiments on intermol. interactions, the electron-enriched thione group in 4-PT is distinguished to be critical to enabling a strong Pb-S interaction, which not only influences the crystallization paths, but also stabilizes the black-phase CsPbI3via crystal surface functionalization. The 4-PT based CsPbI3 achieves 13.88% power conversion efficiency in a p-i-n structured device architecture, and encapsulated devices can retain over 85% of their initial efficiencies after 20 days of storage in an ambient environment, which are the best results among fully low-temperature processed CsPbI3 photovoltaics.

The article 《Electron-enriched thione enables strong Pb-S interaction for stabilizing high quality CsPbI3 perovskite films with low-temperature processing》 also mentions many details about this compound(4556-23-4)COA of Formula: C5H5NS, you can pay attention to it or contacet with the author([email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]) to get more information.

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Reference of Pyridine-4-thiol. 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 Low temperature-boosted high efficiency photo-induced charge transfer for remarkable SERS activity of ZnO nanosheets.

Improving the photo-induced charge transfer (PICT) efficiency is the key factor for boosting the surface-enhanced Raman scattering (SERS) performance of semiconductor nanomaterials. Introducing plentiful surface defect states in porous ZnO nanosheets (d-ZnO NSs) effectively provides addnl. charge transfer routes for highly efficient PICT within the substrate-mol. system. Significantly, an interesting phenomenon of low temperature-boosted SERS activity of these d-ZnO NSs is consequently observed The enhanced SERS activity can be attributed to the efficient PICT processes due to the significant reduction of non-radiative recombination of surface defects at a low temperature This is carefully investigated through combining in situ low-temperature SERS measurements with temperature-dependent photoluminescence (PL) emission spectroscopy. Our results clearly demonstrate that the weakened lattice thermal vibration at a low temperature effectively suppresses the phonon-assisted relaxation and reduces carrier traps, resulting in the increase of PL intensity. The decreased traps of photo-induced electrons at surface defect states effectively facilitate the PICT efficiency within the substrate-mol. system. An ultrahigh enhancement factor of 7.7 x 105 and low limit of detection (1 x 10-7 M) for a 4-mercaptopyridine mol. at a temperature of 77 K are successfully obtained. More importantly, the low temperature-enhanced SERS effect is also obtainable in other metal oxide semiconductors, such as d-TiO2 and d-Cu2O nanoparticles. To the best of our knowledge, this is the first time the low temperature-boosted SERS activity of semiconductors has been observed This study not only provides a deep insight into the chem. SERS mechanism, but also develops a novel strategy for improving semiconductor SERS sensitivity. The strong SERS activity at a low temperature reported here may open new avenues for developing non-metal SERS substrates with new functionalities, especially for the research on cryogenic sensing and hypothermal medicine.

Different reactions of this compound(Pyridine-4-thiol)Reference of Pyridine-4-thiol require different conditions, so the reaction conditions are very important.

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Nitrile – Wikipedia,
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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Recyclable Raman chip for detection of trace Mercury ions, published in 2020-06-15, which mentions a compound: 4556-23-4, mainly applied to pyridinethiol maercury ion Raman mol orientation recyclable chip, Computed Properties of C5H5NS.

Due to enrichment effect of Mercury ions (Hg2+), even if the concentration of Hg2+ is very low, it will do harm to human health. Precise detection of trace Hg2+ is important for environment protection and human health monitoring. In this work, gold nanoparticles (AuNPs) are immobilized on the surface of ITO with aid of inositol-hexaphosphate as linker agent and then 4-pyridinethiol (4-MPy) is decorated to form a 4-MPy/AuNPs/ITO chip. 4-MPy in the chip acts two roles involving the capture agent for Hg2+ and Raman signal reporter. With the adding of Hg2+, the linear increase of SERS response of 4-MPy is in the range from 1.0 ppt to 100 ppb (R2 = 0.9896) and the limit of detection could be down to 1 precipitate The mechanism of the Raman chip was also explored by mol. simulation. It is found that the interaction between Hg2+ and the nitrogen atoms changes the electron distribution of pyridine ring and induces reorientation of the 4-MPy mols. tending to more perpendicular adsorption fashion with respect to AuNPs surface, which leads to enhancement of the intensity of the pyridine breathing vibration peak at 1093 cm-1. The as-prepared SERS sensor chip features excellent stability and reproducibility as well as could be reused. The rapid 4-MPy/AuNPs/ITO-chip-based Raman protocol with capability against interference is competent for monitoring trace Hg2+ in river water samples.

Different reactions of this compound(Pyridine-4-thiol)Computed Properties of C5H5NS require different conditions, so the reaction conditions are very important.

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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.Recommanded Product: Pyridine-4-thiol.Ren, Xuanhe; Tang, Shanyu; Li, Longjia; Li, Jiao; Liang, Helong; Li, Ganzhong; Yang, Guanyu; Li, Heng; Yuan, Bingxin published the article 《Surfactant-Type Catalyst for Aerobic Oxidative Coupling of Hydrazine with Thiol in Water》 about this compound( cas:4556-23-4 ) in Journal of Organic Chemistry. Keywords: PEG functionalized nitrogen ligand surfactant type catalyst; aerobic oxidative coupling hydrazine thiol water surfactant catalyst. Let’s learn more about this compound (cas:4556-23-4).

A series of PEG-functionalized nitrogen ligands were developed to conduct an aerobic oxidative cross-coupling reaction between alkyl- or aryl-hydrazines with thiols in water. This surfactant-type catalyst enables high efficiencies and selectivities, while tolerating a large variety of functional groups. The mother liquor is still catalytically active after five runs.

The article 《Surfactant-Type Catalyst for Aerobic Oxidative Coupling of Hydrazine with Thiol in Water》 also mentions many details about this compound(4556-23-4)Recommanded Product: Pyridine-4-thiol, you can pay attention to it, because details determine success or failure

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Related Products of 4556-23-4. 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 Synthesis of different copper iodide/sulfide clusters via regulating the amount of ligand added. Author is Hu, Dandan; Zhang, Junqi; Song, Jinyu; Ren, Hongjun.

Here, the authors successfully reported two copper iodide/sulfide clusters, Cu6S2I4(C5NS)4 (CIS-1, 1) and Cu6(C5NS)4(CN)2 (CS-2, 2), via changing the amount of ligand (C5H5NS) to regulate its decomposing degree. In CIS-1, 4-pyridinethiol only acted as sulfur source, not as linker between clusters. Oppositely, in another open framework CS-2 containing 4-pyridinethiol, the coordinating capability of N/S from ligand was taken full advantage to connect surrounding clusters via Cu-N and Cu-S bond. UV-visible diffuse reflectance spectroscopy and photocurrent response were performed to research the photoelec. properties about these compounds, whose results demonstrate these hybrid materials belong to semiconductor. That makes them expected as potential semiconducting materials to apply in photoelec. devices.

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Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Quality Control of Pyridine-4-thiol. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Plasmon-coupled charge transfer in WO3-x semiconductor nanoarrays: toward highly uniform silver-comparable SERS platforms. Author is Hou, Xiangyu; Luo, Xiaoguang; Fan, Xingce; Peng, Zhaohui; Qiu, Teng.

Transition metal oxide semiconductors have been explored in surface-enhanced Raman scattering (SERS) active substrates, yet their detection sensitivity and enhancement effects are inferior. What’s more, the reported fabrication technique ignored the effects of the electromagnetic mechanisms and was far from satisfactory for practical applications. Herein, we report on a convenient nanotechnique to fabricate large-area hexagon plum-blossom-like WO3-x nanoarrays based on aluminum nanobowl array substrates. Localized surface plasmon resonance can be increased via adjusting the time of tungsten magnetron sputtering with H2 annealing treatment. The introduction of a double-switch experiment demonstrates that localized surface plasmon-coupled photoinduced charge transfer can not only increase SERS enhancement comparable to similar silver nanostructures but also implement a low limit of detection below 10-9 M. A triple-switch experiment offers specific rules in the mol. detection of WO3-x semiconductors and important guidance for the fabrication of SERS-active semiconducting platforms.

After consulting a lot of data, we found that this compound(4556-23-4)Quality Control of Pyridine-4-thiol can be used in many types of reactions. And in most cases, this compound has more advantages.

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Nitrile – Wikipedia,
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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.

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Dai, Xin; Song, Zhi-Ling; Song, Wenjuan; Zhang, Jiling; Fan, Gao-Chao; Wang, Wei; Luo, Xiliang published the article 《Shell-Switchable SERS Blocking Strategy for Reliable Signal-On SERS Sensing in Living Cells: Detecting an External Target without Affecting the Internal Raman Molecule》. Keywords: SERS Raman spectroscopy.They researched the compound: Pyridine-4-thiol( cas:4556-23-4 ).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.

For SERS anal. in living cells, the inevitable desorption of Raman mol. on the substrate surface is a key challenge. To ensure high stability, SERS systems with Raman mols. protected inside the core-Raman mol.-shell (C-M-S) structures have been designed, but at the expense of sacrificed sensing performances. Here a shell-switchable SERS blocking strategy is developed for the reliable SERS anal. in living cells, relying on the shell blockers to regulate the SERS sensing signal without affecting the internal Raman mols. After several C-M-S structures were studied, the SERS blocking mechanism confirmed that thick shells (Au, Ag, ZnO, and MnO2) can cause a significant reduction in the internal SERS signal by obstructing the penetration of the laser or signal. The CAu-Mpy-SAu-SMnO2 nanoprobe is designed for the ratiometric SERS sensing in living cells, which retains sensing performances even though the Raman mol. is protected inside the nanostructure. This SERS strategy makes the turn-on sensing achievable in living cells with the MnO2 shell as a signal switch and a Raman reference Addnl., it allows for accurate monitoring of the degradation of MnO2 carriers in living cells, even without fluorescent labels.

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Reference:
Nitrile – Wikipedia,
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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.Zhu, Guixian; Cheng, Lin; Liu, Gannan; Zhu, Lianqing researched the compound: Pyridine-4-thiol( cas:4556-23-4 ).Quality Control of Pyridine-4-thiol.They published the article 《Synthesis of gold nanoparticle stabilized on silicon nanocrystal containing polymer microspheres as effective surface-enhanced Raman scattering (SERS) substrates》 about this compound( cas:4556-23-4 ) in Nanomaterials. Keywords: gold nanoparticle silicon nanocrystal polymer microsphere SERS substrate; 4-mercaptopyridine; SERS; gold nanoparticle; pH value; silicon nanocrystal containing polymer microspheres. We’ll tell you more about this compound (cas:4556-23-4).

Developing ideal surface-enhanced Raman scattering (SERS) substrates is significant in biol. detection. Compared with free non-aggregated noble metal nanoparticles, loading metal nanoparticles on a large matrix can achieve a higher SERS effect due to the existence of many “”hot spots””. A novel SERS substrate with intense “”hot spots”” was prepared through reducing gold ions with silicon nanocrystal containing polymer microspheres. The substrate exhibits high SERS sensitivity with an enhancement factor of 5.4×107. By applying 4-mercaptopyridine as a Raman reporter, the developed SERS substrate can realize measurement of pH values. The intensity ratio of 1574 to 1607 cm-1 of 4-mercaptopyridine showed excellent pH sensitivity, which increased as the surrounding pH increased. With good stability and reliability, the pH sensor is promising in the design of biol. detection devices.

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Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts

Quality Control of Pyridine-4-thiol. 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 Hydrogel microdomain encapsulation of stable functionalized silver nanoparticles for SERS pH and urea sensing.

Conceptual and com. examples of implantable sensors have been limited to a relatively small number of target analytes, with a strong focus on glucose monitoring. Recently, surface-enhanced Raman spectroscopy (SERS) pH sensors were demonstrated to track acid-producing enzymic reactions targeting specific analytes. We show here that SERS pH tracking in the basic regime is also possible, and can be used to monitor urea concentration To accomplish this, we developed a hydrogel consisting of polyelectrolyte multilayer microcapsules containing a SERS-sensitive pH reporter (4-mercapopyridine capped silver nanoparticles modified with bovine serum albumin). This pH sensing material exhibited a sensitive Raman scattering response to a wide range of pH from 6.5-9.7. By incorporating urease into the hydrogel matrix, the new sensor was capable of distinguishing urea concentrations of 0, 0.1, 1, and 10 mM. We also found that bovine serum albumin (BSA) prevented severe aggregation of the nanoparticle-based pH sensor, which improved sensing range and sensitivity. Furthermore, BSA safeguarded the pH sensor during the encapsulation procedure. Together, the combination of materials represents a novel approach to enabling optical sensing of reactions that generate pH changes in the basic range.

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Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts