+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Polymer supported reagents for molecular separations

, : Polymer supported reagents for molecular separations. Solvent Extraction & Ion Exchange 7(5): 909-924

A Hammett study of the complexing abilities of various polymer-supported reagents for phenols, anilines, and benzoic acids is described. For each polymeric reagent, the percent absorbed of each family of compounds is correlated with the Hammett substituent constants. A carboxylic acid resin shows no interaction with phenols and benzoic acids; only a week interaction with anilines is found since 25% of each is absorbed regardless of the substituent present on the aromatic ring. This contrasts with the strong interaction displayed by the sulfonic resin and the moderate interaction of the phosphinic resin. Phosphonic and phosphonate monoester resins absorb increasing amounts of anilines as their basicity increases. The purely coordinating phosphonate diester resin absorbs uniformly low levels of the three families of compounds with no substituent effect on the percent absorbed. The sulfonic resin quantitatively absorbs the anilines within the temperture range to while the phosphinic resin absorbs decreasing levels within the same range. The phosphinic resin is more selective than the sulfonic resin under competitive conditions.


Other references

Lazard, J.; Cacot, P., 1997: Aquaculture systems in Vietnam: An overview, challenges, and prospects for research. Vietnam produces annually 1, 150,000 mt of living resources produce which represents 1% of world production. A fifth of this production comes from aquaculture. There are three main aquaculture systems: rice fish (or shrimp) culture, pond aquacultu...

Pallister, W.K.; Organe, G.S., 1989: Sir Geoffrey Stephen William Organe, 25 December 1908-7 January 1989. Anaesthesia 44(6): 461-462

Hecker, W.C., 1972: New points of view in cryptorchism problems. Die Medizinische Welt 23(42): 1476-1476

Eiermann D.R., 1988: Paleoceanography and paleoclimatology of the eastern Mediterranean Sea in the early Pliocene; stable isotope data and geochemical investigations from Crete (Greece). International Association of Sedimentologists Regional Meeting: ges 66-67. 1988.

Anonymous, 2010: Differences by sex in tobacco use and awareness of tobacco marketing -Bangladesh, Thailand, and Uruguay, 2009. The majority of the world's 1.3 billion tobacco users are men, but female use is increasing. To examine differences in tobacco use and awareness of tobacco marketing by sex, CDC and health officials in Bangladesh, Thailand, and Uruguay (among...

Gøtzsche, P.C., 2013: Developing a new drug costs less than $100m, not $900m. Bmj 346: F398-F398

Ranadive, K.J.; Hakim, S., 1959: Chemical induction of mammary cancer in four inbred strains of mice. Four inbred strains of mice -dba(Bar), dba(-MTI), Strong A and C57(B1), varying in their complement of intrinsic etiological factors, were investigated for their response to continuous treatment of 20-methylcholanthrene (2D-MCA). Two-month-old fem...

Bel, E.H., 2013: Obesity and asthma control: do gender, age, and ethnicity really matter?. American Journal of Respiratory and Critical Care Medicine 187(7): 667-668

Drak, J.; Piegza, S.; Soltys, W.; Szewczak, E., 1966: Case of segmental sigmoiditis simulating a neoplasm. Polski Tygodnik Lekarski 21(15): 560-561

Ikumo, H., 1979: Failure to reproduce encephalom. Nihon Kakin Gakkai shi Japanese poultry science 16(4): 225-227