Author: tianli

Nematulloev, Saidkhodzha published the artcile[Cu₁₅(PPh₃)₆(PET)₁₃]²⁺: a Copper Nanocluster with Crystallization Enhanced Photoluminescence, Name: 2-Phenylethanethiol, the publication is Small (2021), 17(27), 2006839, database is CAplus and MEDLINE.

Due to their atomically precise structure, photoluminescent copper nanoclusters (Cu NCs) have emerged as promising materials in both fundamental studies and technol. applications, such as bio-imaging, cell labeling, phototherapy, and photo-activated catalysis. In this work, a facile strategy is reported for the synthesis of a novel Cu NCs coprotected by thiolate and phosphine ligands, formulated as [Cu₁₅(PPh₃)₆(PET)₁₃]²⁺, which exhibits bright emission in the near-IR (NIR) region (≈720 nm) and crystallization-induced emission enhancement (CIEE) phenomenon. Single crystal x-ray crystallog. shows that the NC possesses an extraordinary distorted trigonal antiprismatic Cu₆ core and a, unique among metal clusters, “tri-blade fan”-like structure. An in-depth structural investigation of the ligand shell combined with d. functional theory calculations reveal that the extended C-H···π and π-π intermol. ligand interactions significantly restrict the intramol. rotations and vibrations and, thus, are a major reason for the CIEE phenomena. This study provides a strategy for the controllable synthesis of structurally defined Cu NCs with NIR luminescence, which enables essential insights into the origins of their optical properties.

Small published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C8H10S, Name: 2-Phenylethanethiol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Dong, Chunwei published the artcile[Cu₃₆H₁₀(PET)₂₄(PPh₃)₆Cl₂] Reveals Surface Vacancy Defects in Ligand-Stabilized Metal Nanoclusters, Category: alcohols-buliding-blocks, the publication is Journal of the American Chemical Society (2021), 143(29), 11026-11035, database is CAplus and MEDLINE.

Precise identification and in-depth understanding of defects in nanomaterials can aid in rationally modulating defect-induced functionalities. However, few studies have explored vacancy defects in ligand-stabilized metal nanoclusters with well-defined structures, owing to the substantial challenge of synthesizing and isolating such defective metal nanoclusters. Herein, a novel defective copper hydride nanocluster, [Cu₃₆H₁₀(PET)₂₄(PPh₃)₆Cl₂] (Cu36; PET: phenylethanethiolate; PPh₃: triphenylphosphine), is successfully synthesized at the gram scale via a simple one-pot reduction method. Structural anal. reveals that Cu36 is a distorted half cubic nanocluster, evolved from the perfect Nichol’s half cube. The two surface copper vacancies in Cu36 are found to be the principal imperfections, which result in some structural adjustments, including copper atom reconstruction near the vacancies as well as ligand modifications (e.g., substitution, migration, and exfoliation). D. functional theory calculations imply that the above-mentioned defects have a considerable influence on the electronic structure and properties. The modeling suggests that the formation of defective Cu36 rather than the perfect half cube is driven by the enlargement of the energy gap between the HOMO and the LUMO of the nanocluster. The structural evolution induced by the surface copper atom vacancies provides atomically precise insights into the defect-induced readjustment of the local structure and introduces new avenues for understanding the chem. of defects in nanomaterials.

Journal of the American Chemical Society published new progress about 4410-99-5. 4410-99-5 belongs to alcohols-buliding-blocks, auxiliary class Thiol,Benzene, name is 2-Phenylethanethiol, and the molecular formula is C8H10S, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Lou, Sunqi published the artcileIn Situ Growth of CsPbBr₃ Perovskite Nanocrystals in Lead-Based Matrix toward Significantly Enhanced Water/Photo Stabilities, Name: 2-Hydroxy-2-phenylacetic acid, the publication is Advanced Optical Materials (2022), 10(1), 2101448, database is CAplus.

Perovskite nanocrystals (NCs) are considered as the next-generation platforms for optoelectronic applications, but their poor stability greatly restricts their development. Here, we present a facile composite strategy to synthesize highly stable CsPbBr₃/Pb-MA composite by in situ embedding the CsPbBr₃ NCs in a C₁₆H₁₄Br₂O₆Pb₂ (Pb-MA) organometallic compound (MOC). The CsPbBr₃/Pb-MA composite powders show intense green emission at 519 nm, with a photoluminescence quantum yield of about 48.5% and a full width at half-maximum of about 17 nm. More interestingly, benefitted from the protection of MOC, the CsPbBr₃/Pb-MA composites can maintain 43% and 83% of initial intensity after being illuminated under blue light for 36 h and being immersed in water for 192 h, resp. Compared to the original CsPbBr₃ NCs, the light/water stability of CsPbBr₃/Pb-MA composites is enhanced by about 40 and 700 times (the PL intensities maintain at about 60% of the initial one), resp. As a proof-of-concept, the as-fabricated devices exhibit a wide color gamut, 97.7% and 98.2% of Rec. 2020 for white light-emitting diodes and laser diodes, resp. These findings demonstrate that the combination of MOC and perovskite NCs is an optimized strategy for the exploitation of high-performance perovskite composites for their future optoelectronic applications.

Advanced Optical Materials published new progress about 90-64-2. 90-64-2 belongs to alcohols-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Alcohol,Natural product, name is 2-Hydroxy-2-phenylacetic acid, and the molecular formula is C8H8O3, Name: 2-Hydroxy-2-phenylacetic acid.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Chen, Hui-xia published the artcileClinic efficacy of carboprost tromethamine in preventing vaginal delivery postpartum hemorrhage in subsequent pregnancy after cesarean parturition, Formula: C25H47NO8, the publication is Zhongguo Linchuang Yanjiu (2013), 26(6), 565-566, database is CAplus.

Objective To evaluate efficacy and safety of carboprost tromethamine (Hemabate) in preventing vaginal delivery postpartum hemorrhage in subsequent pregnancy after cesarean parturition. Methods: 96 cases of vaginal delivery subsequently pregnant women after cesarean parturition were randomly divided into observation group of 46 cases and control group of 50 cases, and the observation group was given oxytocin 20U by i.v. infusion after delivery and Hemabate 250μg by deep i.m. injection in hip, while the control group was given oxytocin 20U by i.v. infusion after delivery. Postpartum hemorrhage between the groups and postpartum hemorrhage amount in 2h were compared. Results: Observation group had one case of postpartum hemorrhage (2.17%), and control group had 6 cases of postpartum hemorrhage in (12.00%), and the two groups showed no significant difference (P > 0.05 ). Observation group had decrease in average 2h postpartum hemorrhage amount than the control group (207.34 ± 78.88) vs (263.64 ± 87.49) ml, and the difference was statistically significant P < 0.05. Conclusions: Hemabate can be used for preventing vaginal delivery postpartum hemorrhage in subsequent pregnancy after cesarean parturition with high safety, to some extent, can reduce the incidence of postpartum hemorrhage.

Zhongguo Linchuang Yanjiu published new progress about 58551-69-2. 58551-69-2 belongs to alcohols-buliding-blocks, auxiliary class Chiral,Alkenyl,Amine,Aliphatic cyclic hydrocarbon,Ester,Alcohol,Inhibitor,, name is 2-Amino-2-(hydroxymethyl)propane-1,3-diol (Z)-7-((1R,2R,3R,5S)-3,5-dihydroxy-2-((S,E)-3-hydroxy-3-methyloct-1-en-1-yl)cyclopentyl)hept-5-enoic acid, and the molecular formula is C25H47NO8, Formula: C25H47NO8.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Ma, Xiao-Yan published the artcileConcise and efficient syntheses of methyl 4-(1-methylpyrrolidin-2-yl)-3-oxobutanoate and hygrine, Synthetic Route of 6346-09-4, the publication is Canadian Journal of Chemistry (2020), 98(4), 191-193, database is CAplus.

Me 4-(1-methylpyrrolidin-2-yl)-3-oxobutanoate and hygrine are important biosynthetic intermediates for tropane alkaloids. A concise method to synthesize these two compounds from the key intermediate N-methylpyrrolinium cation has been developed. Me 4-(1-methylpyrrolidin-2-yl)-3-oxobutanoate and hygrine were obtained in four and six steps from com. available 4,4-diethoxybutylamine with overall yields of 42% and 25%, resp.

Canadian Journal of Chemistry published new progress about 6346-09-4. 6346-09-4 belongs to alcohols-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Ether, name is 4,4-Diethoxybutan-1-amine, and the molecular formula is C8H19NO2, Synthetic Route of 6346-09-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Yin, Xia published the artcileIdentification of volatile and odor-active compounds in Hunan black tea by SPME/GC-MS and multivariate analysis, Synthetic Route of 106-25-2, the publication is LWT–Food Science and Technology (2022), 113656, database is CAplus.

Hunan black tea is well-known for its floral-honey aroma, but the volatile components responsible for the fragrance have not been elucidated yet. In this study, the volatile compounds in Hunan black tea were identified and quantified by the headspace solid-phase microextraction coupled with gas chromatog.-mass spectrometry (HS-SPME-GC-MS). The results showed that 88 compounds were extracted and determined in Hunan black tea, including the dominant components Geraniol, phenethyl alc., phenylacetaldehyde, linalool, nonanal and other 5 aromatic compounds Furthermore, the aroma-active compounds were identified by odor activity value (OAV). It was found that 24 aroma compounds, including geraniol with an OAV≥1 were regarded as the primary active aromatic compounds in Hunan black tea. Finally, partial least squares (PLS) regression anal. was employed and results revealed that Nonanal, trans-nerolidol, benzyl alc., and phenylethanol exhibit a pos. correlation with the intensity of floral and sweet honey aromas. Overall, this study identified the volatile compounds responsible for the dominant floral-honey aroma in Hunan black tea.

LWT–Food Science and Technology published new progress about 106-25-2. 106-25-2 belongs to alcohols-buliding-blocks, auxiliary class Natural product, name is cis-3,7-Dimethyl-2,6-Octadien-1-Ol, and the molecular formula is C10H12O5, Synthetic Route of 106-25-2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Bellotti, Peter published the artcileCatalytic defluorinative ketyl-olefin coupling by halogen-atom transfer, COA of Formula: C5H12O2, the publication is Chemical Science (2022), 13(26), 7855-7862, database is CAplus and MEDLINE.

A new approach to achieve catalytic ketyl-olefin coupling reactions by a halogen-atom transfer mechanism provides innovative and efficient access to various gem-difluorohomoallylic alcs. 4-OCH₃C₆H₄C(=C(F)₂)CH₂C(OC(O)C₆H₅)R [R = H, n-pentyl, cyclohexyl, 2-(4-fluorophenyl)ethyl, etc.] under mild conditions with broad substrate scope. Preliminary mechanistic exptl. and computational studies demonstrate that this radical-to-polar crossover transformation could be achieved by sequentially orchestrated Lewis acid activation, halogen-atom transfer, radical addition, single-electron reduction and β-fluoro elimination.

Chemical Science published new progress about 111-29-5. 111-29-5 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ploymers, name is Pentane-1,5-diol, and the molecular formula is C5H12O2, COA of Formula: C5H12O2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Liao, Xia-ling published the artcileMicrostructural characterization of cement in the presence of alkanolamines, Product Details of C9H21NO3, the publication is Materials Today Communications (2021), 102386, database is CAplus.

In order to understand the potential issues regarding the cement performance over time in the presence of alkanolamines, such as triethanolamine (TEA) and triisopropanolamine (TIPA), this investigation provided a series of quant. phase characterization to monitor the hydration and microstructure of cement pastes. The addition of 0.02% alkanolamines to cement promoted the strength development and altered the hydration kinetics at early ages. The aluminate reaction was greatly promoted, which resulted in the formation of hydrosulfoaluminates with a high monosulfoaluminate-to-ettringite ratio due to the facilitated dissolution of the intermediate phase. The morphol. and chem. composition of the hydrates, as well as the porosity of the pastes, were also influenced by the altered hydration kinetics. Particularly, TIPA markedly reduced Si/Ca ratio (from 0.61 to 0.51) and increased Fe/Ca ratio (from 0.016 to 0.036) in the C-S-H gel at the early stage of hydration. Based on the variations in microstructural features subjected to the alkanolamines, the durability and long-term performance of the cement, including the phase variation, resistance to sulfate or chloride ingression and volume stability, were discussed.

Materials Today Communications published new progress about 122-20-3. 122-20-3 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment, name is Triisopropanolamine, and the molecular formula is C9H21NO3, Product Details of C9H21NO3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Wang, Yafeng published the artcileEnantioselective β-hydroxy thioesters formation via decarboxylative aldol reactions of malonic acid half thioesters with aldehydes promoted by chloramphenicol derived sulfonamides¹, Computed Properties of 156453-53-1, the publication is Tetrahedron (2017), 73(34), 5055-5062, database is CAplus.

A highly enantioselective synthesis of chiral β-hydroxy thioesters that uses a decarboxylative aldol reaction of malonic acid half thioesters and aldehydes catalyzed by a chloramphenicol base-derived bifunctional organocatalyst is reported. The resulting chiral β-hydroxy thioesters were obtained in high yields (up to 82%) with good to excellent enantioselectivities (up to 94% ee). The synthetic application of the methodol. is illustrated by the asym. synthesis of the selective serotonin reuptake inhibitor dapoxetine.

Tetrahedron published new progress about 156453-53-1. 156453-53-1 belongs to alcohols-buliding-blocks, auxiliary class Chiral,Benzene,Naphthalene,Alcohol,Ether, name is (R)-3-(Naphthalen-1-yloxy)-1-phenylpropan-1-ol, and the molecular formula is C15H20O6, Computed Properties of 156453-53-1.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Parnes, Howard published the artcileSynthesis of [¹⁴C]-labeled dihydropyridine calcium channel-entry blockers: nicardipine-[4-¹⁴C] and RS-93522-[4-¹⁴C], Synthetic Route of 101-98-4, the publication is Journal of Labelled Compounds and Radiopharmaceuticals (1988), 25(6), 621-6, database is CAplus.

The Hantzsch synthesis was used to prepare title compounds I [R = CH₂CH₂NMeCH₂Ph, CH₂CH₂C₆H₄[OCH₂CH(OH)CH₂OH]-p] from m-O₂NC₆H₄¹⁴CHO (II), H₂NCMe:CHCO₂Me, and MeCOCH₂CO₂R. II was prepared in high yield from PhBr and ¹⁴CO₂ in 4 steps.

Journal of Labelled Compounds and Radiopharmaceuticals published new progress about 101-98-4. 101-98-4 belongs to alcohols-buliding-blocks, auxiliary class Amine,Benzene,Alcohol, name is 2-(Benzyl(methyl)amino)ethanol, and the molecular formula is C10H15NO, Synthetic Route of 101-98-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts