Spectroscopic studies of ionic solvation. XIX. Fluorine-19 and sodium-23 NMR studies of ionic interactions in nonaqueous solutions of hexafluorophosphate salts

1976 ◽  
Vol 5 (4) ◽  
pp. 231-240 ◽  
Author(s):  
Wayne J. DeWitte ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Interactions ◽  
Nmr Studies ◽  
Nonaqueous Solutions ◽  
Ionic Solvation

Spectroscopic studies of ionic solvation in propylene carbonate

1973 ◽  
Vol 77 (20) ◽  
pp. 2407-2410 ◽  
Author(s):  
Howard L. Yeager ◽  
John D. Fedyk ◽  
Richard J. Parker
Keyword(s):  
Propylene Carbonate ◽  
Spectroscopic Studies ◽  
Ionic Solvation

Direct NMR Studies of Ionic Solvation

1981 ◽  
pp. 175-190 ◽  
Author(s):  
Pierre Laszlo ◽  
André Cornélis ◽  
Alfred Delville ◽  
Christian Detellier ◽  
André Gerstmans ◽  
...  
Keyword(s):  
Nmr Studies ◽  
Ionic Solvation

Extraction of novel sulfated polysaccharides from Aphanothece sacrum (Sur.) Okada, and its spectroscopic characterization

2007 ◽  
Vol 79 (11) ◽  
pp. 2039-2046 ◽  
Author(s):  
Maiko Okajima-Kaneko ◽  
Masateru Ono ◽  
Kiyotaka Kabata ◽  
Tatsuo Kaneko
Keyword(s):  
Spectroscopic Characterization ◽  
Spectroscopic Studies ◽  
Environmentally Benign ◽  
Sulfated Polysaccharides ◽  
Nmr Studies ◽  
H Nmr ◽  
Elemental Analyses ◽  
Gelation Behavior ◽  
Long Time ◽  
Swelling Volume

We extracted polysaccharides (PS) from Aphanothece sacrum using a hot alkaline solution which degraded other biopolymers such as proteins and nucleotides. The spectroscopy and elemental analyses indicated the PS contain carboxyls and sulfate groups. The degree of sulfation was estimated as about 10 mol %. 1H NMR studies demonstrated that the PS of A. sacrum had a dimethylated fucose unit. The combination of sulfate group and fucose in the prokaryotic PS was first evidenced by the direct spectroscopic studies. The PS showed efficient gelation behavior, binding to metal ions abundant in soil, and the swelling volume of the gel was approximately 250 times the dry volume. These results imply that PS of A. sacrum, which has been mass cultivated in Japan for a long time, may have potential as an environmentally benign water absorbent.

Spectroscopic studies of ionic solvation—XV

1973 ◽  
Vol 29 (11) ◽  
pp. 1927-1932 ◽  
Author(s):  
Mark S. Greenberg ◽  
Diana M. Wied ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Solvation

Spectroscopic studies of ionic solvation in pyridine solutions

1970 ◽  
Vol 74 (3) ◽  
pp. 535-537 ◽  
Author(s):  
William J. McKinney ◽  
Alexander I. Popov
Keyword(s):  
Spectroscopic Studies ◽  
Ionic Solvation
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