Eco-friendly and fast bromination of industrially-important aromatic compounds in water using recyclable AlBr3-Br2 system

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aromatic Compounds ◽  
Molecular Bromine ◽  
Economical Method ◽  
System P

A fast, efficient, simple, eco-friendly, regioselective, controllable and economical method for the bromination of aromatic compounds using AlBr3-Br2 system was invetigated. The direct bromination of anilines and phenols with molecular bromine in solution frequently results in polybromination, and when brominated in the existence of oxidants, they also get oxidized rather than experiencing substitutions and in some cases, require fortification of the amino (-NH2) group.

scholarly journals The synergistic effect of cuprous oxide on an intumescent flame-retardant epoxy resin system

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 35619-35628 ◽  
Author(s):  
Ming-Jun Chen ◽  
Xu Wang ◽  
Xin-Lei Li ◽  
Xing-Ya Liu ◽  
Liu Zhong ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Synergistic Effect ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Cuprous Oxide ◽  
Aromatic Compounds ◽  
Resin System ◽  
System P ◽  
Epoxy Resin System ◽  
Flammable Material

Neat epoxy resin (EP) is a highly flammable material, and the pyrolysis volatiles of it contain some harmful gases such as carbon monoxide, aromatic compounds, hydrocarbons, etc.

A direct and simplistic bromination of commercially important organic compounds in aqueous media by eco-friendly AlBr3-Br2 reagent system

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Organic Compounds ◽  
Efficient Method ◽  
High Purity ◽  
Aqueous Media ◽  
Economical Method ◽  
Highly Efficient ◽  
System P ◽  
Environmentally Safe ◽  
Commercially Important

A facile, simplistic, highly efficient, environmentally safe, regioselective, controllable and economical method for the bromination of organic compounds using aqueous AlBr3-Br2 reagent system was investigated. As synthesized brominated organic compounds were characterize using advanced techniques. The yield was all synthesized brominated organic compounds was excellent with high purity. Results revealed that this direct and simple bromination of commercially important organic compounds in aqueous media in the presence of recycle of AlBr3-Br2 reagent system is efficient method and could possibly be extended for the synthesis of other organic compounds.

Comparison of TEM and STM observations of small silver clusters on different carbon supports

1990 ◽  
Vol 48 (4) ◽  
pp. 264-265
Author(s):  
Bernd Tesche ◽  
Tobias Schilling
Keyword(s):  
Vibration Isolation ◽  
Pyrolytic Graphite ◽  
Carbon Film ◽  
Silver Clusters ◽  
Carbon Supports ◽  
Stacking Order ◽  
System P ◽  
High Resolution Tem ◽  
High Degree ◽  
Degree Of Order

The objective of our work is to determine:a) whether both of the imaging methods (TEM, STM) yield comparable data andb) which method is better suited for a reliable structure analysis of microclusters smaller than 1.5 nm, where a deviation of the bulk structure is expected.The silver was evaporated in a bell-jar system (p 10−5 pa) and deposited onto a 6 nm thick amorphous carbon film and a freshly cleaved highly oriented pyrolytic graphite (HOPG).The average deposited Ag thickness is 0.1 nm, controlled by a quartz crystal microbalance at a deposition rate of 0.02 nm/sec. The high resolution TEM investigations (100 kV) were executed by a hollow-cone illumination (HCI). For the STM investigations a commercial STM was used. With special vibration isolation we achieved a resolution of 0.06 nm (inserted diffraction image in Fig. 1c). The carbon film shows the remarkable reduction in noise by using HCI (Fig. 1a). The HOPG substrate (Fig. 1b), cleaved in sheets thinner than 30 nm for the TEM investigations, shows the typical arrangement of a nearly perfect stacking order and varying degrees of rotational disorder (i.e. artificial single crystals). The STM image (Fig. 1c) demonstrates the high degree of order in HOPG with atomic resolution.

Conclusion: What is Speculative Empiricism?

2018 ◽  
Author(s):  
Didier Debaise
Keyword(s):  
Social Groups ◽  
Speculative Philosophy ◽  
System P ◽  
History Of ◽  
Selection Of

Process and Reality ends with a warning: ‘[t]he chief danger to philosophy is narrowness in the selection of evidence’ (PR, 337). Although this danger of narrowness might emerge from the ‘idiosyncrasies and timidities of particular authors, of particular social groups, of particular schools of thought, of particular epochs in the history of civilization’ (PR, 337), we should not be mistaken: it occurs within philosophy, in its activity, its method. And the fact that this issue arises at the end of Process and Reality reveals the ambition that has accompanied its composition: Whitehead has resisted this danger through the form and ambition of his speculative construction. The temptation of a narrowness in selection attempts to expel speculative philosophy at the same time as it haunts each part of its system.

Pedestrian Oriented Vehicular Collision Avoidance Support System: P-VCASS

2010 ◽  
Vol E93-A (4) ◽  
pp. 679-688 ◽  
Author(s):  
Tomotaka WADA ◽  
Yuki NAKANISHI ◽  
Ryohta YAMAGUCHI ◽  
Kazushi FUJIMOTO ◽  
Hiromi OKADA
Keyword(s):  
Collision Avoidance ◽  
Support System ◽  
System P
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