Hydrogenolysis of organometallics and the acidity of hydrogen

1976 ◽  
Vol 54 (24) ◽  
pp. 3949-3954 ◽  
Author(s):  
Erwin Buncel ◽  
Balachandran C. Menon
Keyword(s):  
Room Temperature ◽  
Reaction System ◽  
Ion Association ◽  
Cesium Salt ◽  
Equilibrium Processes ◽  
Cesium Salts

The hydrogenolysis of a series of alkylcesiums in cyclohexylamine solvent has been studied spectrophotometrically. The cesium salt of p-phenyltoluene reacts with H2 (1 atm, room temperature), but the cesium salts of di-2,4-xylylmethane and of diphenylmethane are unreactive. The results show that the acidity of H2 is intermediate between those of p-phenyltoluene and of di-2,4-xylylmethane in this reaction system. Possible effects of ion association phenomena on the equilibrium processes are considered.

Cu(OAc)2/Malononitrile/Water: A Simple Reaction System for Synthesis of Aromatic Nitriles from Aldoximes

2018 ◽  
Vol 42 (12) ◽  
pp. 595-597 ◽  
Author(s):  
Xiaoyun Ma ◽  
Daqin He ◽  
Zhengjian Chen
Keyword(s):  
Good Yield ◽  
Room Temperature ◽  
Copper Acetate ◽  
Reaction System ◽  
Simple Method ◽  
Aromatic Nitriles ◽  
Simple Reaction

A simple method for the preparation of nitriles in moderate to good yield has been achieved by treatment of aromatic and heterocyclic aldoximes with malononitrile in water at reflux in the presence of copper acetate as catalyst. Arylaldoximes with an electron-donating group showed the highest reactivity, their conversion being achievable at room temperature.

Copper(ii)-catalyzed cross dehydrogenative coupling reaction of N-hydroxyphthalimide with alkanes and ethers via unactivated C(sp3)–H activation at room temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79016-79019 ◽  
Author(s):  
Zhicheng Guo ◽  
Can Jin ◽  
Jiadi Zhou ◽  
Weike Su
Keyword(s):  
Mild Condition ◽  
Room Temperature ◽  
Reaction System ◽  
Coupling Reaction ◽  
Dehydrogenative Coupling

This reaction system shows mild condition and broad substrate scope for generation of O-substituted N-hydroxyphthalimide derivatives via unactivated C(sp3)–H activation.

Structural Modifications of the Aluminium Alloy in Conditions of Additional Shock Impulse Load

2013 ◽  
Vol 592-593 ◽  
pp. 598-601 ◽  
Author(s):  
Volodymyr Hutsaylyuk ◽  
Mykola Czausow ◽  
Lucjan Śnieżek ◽  
Andrii Pylypenko ◽  
Tomasz Ślęzak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Room Temperature ◽  
Structural Changes ◽  
Physical Nature ◽  
Structural Modifications ◽  
Equilibrium Processes ◽  
Impulse Load ◽  
Aluminum Alloy 2024 ◽  
The Impact

This work has been done to research the physical nature of the mechanism of structural changes of the aluminum alloy 2024-T3 at the conditions of additional impulse load. There was revealed an anomaly growth in plasticity of the material after such type load realization at the room temperature. Based on fractographical research the impact of dynamic non-equilibrium processes on the structural changes of the material and its macro-mechanical properties was analyzed.

scholarly journals Dual-Functional Peroxidase-Copper Phosphate Hybrid Nanoflowers for Sensitive Detection of Biological Thiols

2021 ◽  
Vol 23 (1) ◽  
pp. 366
Author(s):  
Xuan Ai Le ◽  
Thao Nguyen Le ◽  
Moon Il Kim
Keyword(s):  
Room Temperature ◽  
Reaction System ◽  
Clinical Diagnostics ◽  
Fluorescent Detection ◽  
One Pot ◽  
Catalytic Activities ◽  
Cellular Processes ◽  
Dual Functional ◽  
Copper Phosphate ◽  
Reliable Quantification

An effective strategy to detect biological thiols (biothiols), including glutathione (GSH), cysteine (Cys), and homocysteine (Hcy), holds significant incentive since they play vital roles in many cellular processes and are closely related to many diseases. Here, we demonstrated that hybrid nanoflowers composed of crystalline copper phosphate and horseradish peroxidase (HRP) served as a functional unit exhibiting dual catalytic activities of biothiol oxidase and HRP, yielding a cascade reaction system for a sensitive one-pot fluorescent detection of biothiols. The nanoflowers were synthesized through the anisotropic growth of copper phosphate petals coordinated with the amine/amide moieties of HRP, by simply incubating HRP and copper(II) sulfate for three days at room temperature. Copper phosphates within the nanoflowers oxidized target biothiols to generate H2O2, which activated the entrapped HRP to oxidize the employed Amplex UltraRed substrate to produce intense fluorescence. Using this strategy, biothiols were selectively and sensitively detected by monitoring the respective fluorescence intensity. This nanoflower-based strategy was also successfully employed for reliable quantification of biothiols present in human serum, demonstrating its great potential for clinical diagnostics.

A new strategy for the selective oxidation of alcohols catalyzed by a polyoxometalate-based hybrid surfactant in biphasic systems

2019 ◽  
Vol 55 (25) ◽  
pp. 3598-3601 ◽  
Author(s):  
Xueli Bai ◽  
Xin Huang ◽  
Liang Wen ◽  
Nianze Song ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Room Temperature ◽  
Reaction System ◽  
Catalytic Performance ◽  
Interface Area ◽  
System Form ◽  
Oxidation Of Alcohols ◽  
New Strategy ◽  
Hybrid Surfactant ◽  
Biphasic Systems

At room temperature, 18C-silyl-POM makes a reaction system form an emulsion to increase the interface area and improve the catalytic performance.

Influence of the pH Value on the Water-Reducing Performance of Polycarboxylate-Based Superplasticizers at Room Temperature

2014 ◽  
Vol 989-994 ◽  
pp. 97-101 ◽  
Author(s):  
Jin Wen Wang ◽  
Guang Jun Zheng ◽  
Shao Feng Wang ◽  
Chen Fei Fu ◽  
Yao Bi
Keyword(s):  
Room Temperature ◽  
Ph Value ◽  
Reaction System ◽  
Redox Initiator

In order to study the effect of the pH value of reaction system on the properties of polycarboxylate-based superplasticizers (PC) and on the cement workability, the PC are synthesized in different pH environments from 3 to 11 at room temperature. The results show the water-reducing performance of PC can be tuned by controlling the pH value of reaction system at room temperature, which affects not only the efficiency and rate of redox initiator systems but also the reactivity of active monomers.

Evaluation of self-collected urine dip swab method for detection of Chlamydia trachomatis

Sexual Health ◽  
2009 ◽  
Vol 6 (3) ◽  
pp. 213 ◽  
Author(s):  
Anna-Maria Costa ◽  
Christopher K. Fairley ◽  
Suzanne M. Garland ◽  
Sepehr N. Tabrizi
Keyword(s):  
Chlamydia Trachomatis ◽  
Room Temperature ◽  
Reaction System ◽  
Urine Samples ◽  
Postal Service ◽  
Positive Urine ◽  
Polymerase Chain ◽  
Inhibition Control ◽  
Positive Results

Background: The present study is an evaluation of a self-collected urine dip (SCUD) swab as an alternative sampling method for the detection of Chlamydia trachomatis (CT) in urine samples that conforms to postal service regulations in Australia. Methods: Sixty urine samples, previously identified as CT positive were used to prepare SCUD swabs in vitro. In addition, replicate SCUD swabs were prepared from known CT positive urine samples and stored at room temperature, or sent through the postal system. All samples were tested for CT and an inhibition control using the Roche TaqMan 48 Real-time polymerase chain reaction system. Results: Overall, 58/60 (97%) SCUD swabs generated positive CT results. Triplicate SCUD swabs prepared from five known positive urine samples and stored up to 7 days at room temperature, showed positive results in all samples. Ten replicates of SCUD swabs from five known CT positive samples were also tested after being posted from different regions in Australia, with a transit time of 2–7 days, back to the Melbourne laboratory. There was 94% positivity of the SCUD swab samples. Conclusion: The present study demonstrated SCUD swabs to be a sensitive and robust method of self-collecting samples for detection of CT subsequent to sending the samples through the postal service.

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