49668-99-7Relevant articles and documents
An unusual anionic oxo-(μ-oxo)-vanadium(V) network interlinked by cationic sodium chains
Julien-Cailhol, Nathalie,Rose, Eric,Vaisserman, Jaqueline,Rehder, Dieter
, p. 2111 - 2115 (1996)
The new compound 6-(1-cyano-2-hydroxyprop-1-enyl)pyridine-2-carboxylic acid (H2L) has been prepared and the structure of its ethyl ester determined. The salt NaHL reacted with VO2+ to form the vanadium(V) complex [Na(MeOH)2][VO2L]. Crystal-structure analysis of the complex revealed octahedral co-ordination of both the sodium and vanadium ions. Vanadium is co-ordinated to enolate oxygen, carboxylate oxygen, pyridine nitrogen, and two doubly bonded oxo groups in cis positions. The sixth position is occupied by the oxo group of a neighbouring vanadium centre at a rather long distance of 2.214(2) A. Anionic, asymmetrically oxo-bridged vanadium chains are thus formed. These are interlinked by cationic sodium chains with sodium bonded to two bridging methanols, the cyano nitrogen of one of the vanadate chains and the co-ordinated carboxylate of the alternate vanadate chain. The network is further stabilized by hydrogen bonds. The relevance of the complex to biogenic vanadium compounds is discussed.
Amphiphilic Tb (III) complex and its preparation method for the preparation of fluorescent nano-fibers and method and application
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Paragraph 0049; 0054-0055; 0057, (2017/02/02)
The invention relates to an amphiphilic Tb (III) complex, a preparation method thereof and a preparation method and application of fluorescent nano-fibers. By virtue of characteristics of a rigid framework, biocompatibility and self-assembling of cholesterol molecules, the amphiphilic Tb (III) complex containing a cholesterol structural unit and bi-picolinic acid is designed and prepared, the supermolecule fluorescent nano-fibers based on the amphiphilic Tb (III) complex are assembled, and action mechanisms of the fluorescent nano-fibers and aurintricarboxylic acid are researched; by virtue of synergetic complexing between aurintricarboxylic acid and ions of Tb (III) and an energy transfer process, aurintricarboxylic acid is efficiently sensed. Related reaction conditions are mild and easy to achieve, the preparation method of the fluorescent nano-fibers is simple, convenient and easy to operate, the prepared fluorescent nano-fibers are uniform in size, the sensitivity for detecting aurintricarboxylic acid is high, the selectivity is good, and the fluorescent nano-fibers are hopeful for being used for researching the pharmaceutical process of aurintricarboxylic acid.
Synthesis and binding properties of guanidinium biscarboxylates
Spaeth, Andreas,Gonschor, Janina,Koenig, Burkhard
experimental part, p. 1289 - 1308 (2012/06/15)
The ammonium ion binding site of the enzyme glutaminase HisF inspired us to design guanidinium biscarboxylates as potential self-organized ionophores in molecular recognition. The syntheses of the title compounds based on aliphatic and aromatic building b