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1 H and 13 C NMR studies of TTHA complexes with diamagnetic rare earth ions
Author(s) -
Zhang ShanRong,
Ren JiMin,
Pei FengKui,
Liu AiZhuo,
Xiao YanWen
Publication year - 1995
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19950130508
Subject(s) - chemistry , diamagnetism , ion , rare earth , nuclear magnetic resonance spectroscopy , crystallography , stereochemistry , organic chemistry , mineralogy , physics , magnetic field , quantum mechanics
TTHA complexes with diamagnetic rare earth ions (La 3+ , Y 3+ and Lu 3+ ) were studied by 1 H and 13 C NMR spectroscopy. A symmetric structural model was suggested for La(TTHA) complex and an asymmetric model for Y(TTHA) and Lu(TTHA) complexes. The complex formation was dependent on the pH value of the solution. The interactions of La(TTHA) with the additional metal ions (La 3+ , Y 3+ and Ca 2+ ) were relatively weak, but relatively strong for that of Lu(TTHA) with the additional Lu 3+ .