Photochemistry of 2,2'-dinitrodiphenylmethanes. II. Irradiation of 5,5'-dimethyl- 2,2'-dinitrodiphenylmethanes in neutral, acidic and alkaline media

1982 ◽  
Vol 35 (11) ◽  
pp. 2377 ◽  
Author(s):  
M Christudhas ◽  
CP Joshua
Keyword(s):  
Major Product ◽  
The Other ◽  
Alkaline Media ◽  
Plausible Mechanism ◽  
Acidic And Alkaline Media

Photolysis of 5,5'-dimethyl-2,2'-dinitrodiphenylmethanes(1)in propan-2-ol yielded 2,9-dimethyl-11 H-dibenzo[c,f][1,2]diazepin-11-one 5-oxides(2) as the major product. 5-Methyl-3-(5'-methyl-2'- nitrophenyl)-2,1-benzisoxazoles (3), 2,9-dimethyldibenzo[c,f][1,2]diazepin-11-ones (4),2,2'-dinitro-tenzophenones (5), acridinones (6), N-hydroxyacridinones (7), dibenzo[c,f][1,2]diazepin-11-one 5,6-dioxide (8)and 2,2'-dinitrosobenzophenone(9)were also formed in varying amounts. Irradiation of (1) in acidic ethanol afforded benzisoxazoles (3) as the major product. In benzene medium, the major photoproduct of (1) was 2,2'-dinitrobenzophenones (5). Irradiation of (1) in triethylamine afforded dibenzo[c,f][1,2]diazepines (12) also in addition to the other products. A plausible mechanism to account for the formation of various products in these photoreactions is discussed.

Photochemistry of 2,2'-dinitrodiphenylmethanes: Irradiations in neutral, acidic and alkaline media

1976 ◽  
Vol 29 (4) ◽  
pp. 865 ◽  
Author(s):  
CP Joshua ◽  
PK Ramdas
Keyword(s):  
Sulphuric Acid ◽  
Isopropyl Alcohol ◽  
Major Product ◽  
The Other ◽  
Alkaline Media ◽  
Other Hand ◽  
Acidic And Alkaline Media

Photolysis of 2,2'-dinitrodiphenylmethane (1) in isopropyl alcohol affords dibenzo[c,f][l,2]diazepin-11-one 5-oxide (7) as the major product. Dibenzo[c,f][l,2]diazepin-11-one 5,6-dioxide (6), acridone (8) and 2,2'-dinitrobenzophenone (9) are also formed in the reaction. Irradiation of (1) in ethanolic sulphuric acid on the other hand yields 3-(2'-nitropheny1)-2,l-benzisoxazole (11) as the major product; small amounts of (7), (8) and (9) are also isolated. Photoconversion of (1) in triethylamine and alcoholic triethylamine proceeds very slowly and compounds (7), (8) and (9) only are isolated from the photolysed solution. Some aspects of the mechanism are discussed.

scholarly journals Superior FexN electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media

2020 ◽  
Vol 9 (1) ◽  
pp. 843-852
Author(s):  
Hunan Jiang ◽  
Jinyang Li ◽  
Mengni Liang ◽  
Hanpeng Deng ◽  
Zuowan Zhou
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Current Density ◽  
Active Sites ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Acidic Media ◽  
Onset Potential ◽  
Acidic And Alkaline Media ◽  
The Stability

AbstractAlthough Fe–N/C catalysts have received increasing attention in recent years for oxygen reduction reaction (ORR), it is still challenging to precisely control the active sites during the preparation. Herein, we report FexN@RGO catalysts with the size of 2–6 nm derived from the pyrolysis of graphene oxide and 1,1′-diacetylferrocene as C and Fe precursors under the NH3/Ar atmosphere as N source. The 1,1′-diacetylferrocene transforms to Fe3O4 at 600°C and transforms to Fe3N and Fe2N at 700°C and 800°C, respectively. The as-prepared FexN@RGO catalysts exhibited superior electrocatalytic activities in acidic and alkaline media compared with the commercial 10% Pt/C, in terms of electrochemical surface area, onset potential, half-wave potential, number of electrons transferred, kinetic current density, and exchange current density. In addition, the stability of FGN-8 also outperformed commercial 10% Pt/C after 10000 cycles, which demonstrates the as-prepared FexN@RGO as durable and active ORR catalysts in acidic media.

scholarly journals Multiple actins in drosophila melanogaster

1979 ◽  
Vol 82 (1) ◽  
pp. 86-92 ◽  
Author(s):  
SJ Horovitch ◽  
RV Storti ◽  
A Rich ◽  
ML Pardue
Keyword(s):  
Body Wall ◽  
Flight Muscle ◽  
Cell Types ◽  
Major Product ◽  
The Other ◽  
Stable Form ◽  
Larval Body ◽  
Drosophila Cell ◽  
Muscle Tissues ◽  
Adult Abdomen

The tissue and developmental specificities of the three Drosophila isoactins, originally identified in primary myogenic cultures and in the permanent Schneider L-2 cell line, have been investigated. Of these three isoactins (I, II, and III), actins I and II are stable and actin III is unstable. Two-dimensional polyacrylamide gel electrophoretic analyses of total cellular extracts after 1-h [(35)S]methionine pulses were performed on a large variety of embryonic, larval, and adult muscle and nonmuscle tissues. The results suggest that isoactins II and III are generalized cellular actins found in all drosophila cell types. Actin I, on the other hand, is muscle-associated and is found exclusively in supercontractile muscle (such as larval body wall and larval and adult viscera) including primary myogenic cell cultures. Although actin I synthesis is not detectable during very early embryogenesis, it is detectable by 25 h and actin I is a major stable actin in all larval muscle tissues. Actin I is synthesized in reduced amounts relative to the other actins in late third instar larvae but is again a major product of actin synthesis in the adult abdomen. A stable actin species with the same pI as actin III has been identified in the adult thorax and appears to be unique to flight muscle tissue. This new stable form of thoracic actin may be the result of a stabilization of the actin III found in other tissues or may be an entirely separate gene product.

Sulfonated poly(ether ether ketone) based composite membranes for nanofiltration of acidic and alkaline media

2011 ◽  
Vol 381 (1-2) ◽  
pp. 81-89 ◽  
Author(s):  
Mayur Dalwani ◽  
Gerrald Bargeman ◽  
Seyed Schwan Hosseiny ◽  
Marcel Boerrigter ◽  
Matthias Wessling ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Alkaline Media ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Acidic And Alkaline Media ◽  
Sulfonated Poly

Nanostructured molybdenum phosphide/N,P dual-doped carbon nanotube composite as electrocatalysts for hydrogen evolution

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7370-7377 ◽  
Author(s):  
Yang Zhao ◽  
Shuo Wang ◽  
Chunyan Li ◽  
Xianbo Yu ◽  
Chunling Zhu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Hydrogen Evolution ◽  
Alkaline Media ◽  
Term Stability ◽  
Long Term Stability ◽  
Excellent Activity ◽  
Molybdenum Phosphide ◽  
Carbon Nanotube Composite ◽  
Acidic And Alkaline Media

MoP/N,P dual-doped carbon nanotube composite exhibited excellent activity and long-term stability toward HER both in acidic and alkaline media, superior to most of catalysts reported previously.

Highly active Fe–N-doped porous hollow carbon nanospheres as oxygen reduction electrocatalysts in both acidic and alkaline media

Nanoscale ◽  
2020 ◽  
Vol 12 (28) ◽  
pp. 15115-15127 ◽  
Author(s):  
Meng-geng Hao ◽  
Rong-min Dun ◽  
Yu-miao Su ◽  
Wen-mu Li
Keyword(s):  
Oxygen Reduction ◽  
Nitrogen Sources ◽  
Alkaline Media ◽  
Carbon Nanospheres ◽  
Highly Active ◽  
Acidic And Alkaline Media ◽  
Hollow Carbon ◽  
Soft Templates

MF nanospheres decomposed into NH3 and CO2 as soft templates, nitrogen sources and pore-forming agents.

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