Document Detail


Polymerization of lanthanide acrylonitrile complexes.
MedLine Citation:
PMID:  12185755     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The molecular complexes of some lanthanides scandium (Sc3+), yttrium (Y3+), lanthanum (La3+), gadolinium (Gd3+), cerium (Ce3+) and ytterbium (Yb3) have been studies in dimethyl formamide (DMF) spectrophtometrically equilibrium constants (K), molar extintion coefficient (epsilon), energy of transition (E) and free energy (delta G*) were calculated. The polymerization of acrylonitrile has been studied and investigated in the presence of Sc3+, Y3+, La3+, Gd3+, Ce3+, and Yb3+ ions. The IR spectra of the formed AN-M (III) Br3 polymer complexes show the absence of the C identical to N band and the presence of two new bands corresponding to NH2 and OH groups. Magnetic moment values and the thermal stabilities of homopolymer and the polymer complexes were studied by means of thermogravimetric analysis and the activation energies for degradation were calculated.
Authors:
El-Sayed H el-Mossalamy; Ahmed A Khalil
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annali di chimica     Volume:  92     ISSN:  0003-4592     ISO Abbreviation:  Ann Chim     Publication Date:    2002 Jul-Aug
Date Detail:
Created Date:  2002-08-20     Completed Date:  2003-01-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7610375     Medline TA:  Ann Chim     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  741-8     Citation Subset:  IM    
Affiliation:
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt. el-mossalamy@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Acrylonitrile / chemistry*
Carcinogens / chemistry*
Lanthanoid Series Elements / chemistry*
Magnetics
Polymers / chemistry
Spectrophotometry
Thermogravimetry
Chemical
Reg. No./Substance:
0/Carcinogens; 0/Lanthanoid Series Elements; 0/Polymers; 107-13-1/Acrylonitrile

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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