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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, (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.
Conversion of molecular information by luminescent nanointerface self-assembled from amphiphilic Tb(III) complexes
Liu, Jing,Morikawa, Masa-Aki,Kimizuka, Nobuo
, p. 17370 - 17374 (2011/12/13)
A novel amphiphilic Tb3+ complex (TbL+) having anionic bis(pyridine) arms and a hydrophobic alkyl chain is developed. It spontaneously self-assembles in water and gives stable vesicles that show sensitized luminescence of Tb3+ ions at neutral pH. This TbL + complex is designed to show coordinative unsaturation, i.e., water molecules occupy some of the first coordination spheres and are replaceable upon binding of phosphate ions. These features render TbL+ self-assembling receptor molecules which show increase in the luminescence intensity upon binding of nucleotides. Upon addition of adenosine triphosphate (ATP), significant amplification of luminescent intensity was observed. On the other hand, ADP showed moderately increased luminescence and almost no enhancement was observed for AMP. Very interestingly, the increase in luminescence intensity observed for ATP and ADP showed sigmoidal dependence on the concentration of added nucleotides. It indicates positive cooperative binding of these nucleotides to TbL+ complexes preorganized on the vesicle surface. Self-assembly of amphiphilic Tb3+ receptor complexes provides nanointerfaces which selectively convert and amplify molecular information of high energy phosphates linked by phosphoanhydride bonds into luminescence intensity changes.
