Aluminum chelation

For example, the //V characteristics of devices based on the aluminum chelate complex Alq3, where Ag-Mg or ln-Mg are used as the cathode, can be described by thermionic emission of electrons over the barrier height at the electron injection contact/Alq3 [78]. 

Anthraquinone, 1-hydroxy-calcium aluminum chelate compound, 1,2 metal complexes dyes, 6,86 Antiarthritis drugs labelled gold compounds, 6, 969 metal complexes, 6,758 Antibiotic M139163,2, 974 Antibiotics ionophoric, 6, 553 metal complexes selective binding, 6, 552... 

Mixed ligand 8-quinolinolato aluminum chelate luminophors... 

Different historians ascribe different dates to the discovery of the first coordination compound. Perhaps the earliest known of all coordination compounds is the bright-red alizarin dye, a calcium aluminum chelate compound of hydroxyanthraquinone. It was first used in India and known to the ancient Persians and Egyptians long before it was used by the Greeks and Romans. Joseph s coat of many colors may possibly have been treated with it. 

Shuman LM, Wilson DO, Ramseur EL. 1991. Testing aluminum-chelate equilibria models using sorghum root growth as a bioassay for aluminum. Water Air Soil Pollut 57-58 149-158. 

Yokel RA. 1994. Aluminum chelation Chemistry, clinical, and experimental studies and the search for alternatives to desferrioxamine. J Toxicol Environ Health 41 131-174. 

Loweth et al. [120] showed that fluoride induces apoptosis in clonal pancreatic fi cells and in the cells of normal rat islets of Langerhans. The process may reflect the formation of AlF41 since it was inhibited by the aluminum chelator desferrioxamine. Recent studies provide evidence that apoptosis of pancreatic fi cells is important in the early etiology of diabetes mellitus. Treating thymus lobe cells with aluminofluoride complexes also provoked apoptosis of a wider range of thymocyte subtypes [121] with an accumulation of inositol phosphates. The responses to aluminofluoride complexes were not prevented by inhibitors of tyrosine kinases, suggesting that unidentified G-proteins which couple to phospholipase C activation may also be capable of initiating apoptosis by a route independent of the T cell receptor. 

Stereoselective condensation with imines. The diethylaluminum enolate of 1 reacts with a wide variety of imines with high stereofacial bias, which is ascribed to a cyclic transition state in an aluminum chelate. 

The earhest known coordination compound is possibly bright red ahzarin dye, a calcium aluminum chelate compound... 

Further confirmation of fhe formation of fhe aluminum chelate was obtained by generating this intermediate fhrough a separate pafhway. Addition of Et2AlCl (1 equiv.) to the oxazohdinone 1 at -78 °C followed by addition of sodium tetra-kis(bis(3,5-ditrifluoromefhyl)phenyl) borate produced 5 (Scheme 6.3). Use of 5 in the Diels-Alder reaction wifh cyclopentadiene, however, resulted in an endojexo ratio and endo facial selectivity not as high as those reported by Evans for fhe use of 1.4 equiv. Et2AlCl, despite the higher reactivity which caused loss of selectivity. 

MATERIALS. The polyimide used in this study, PI-2555 and PIQ-13 (polyimide isoindoloquinazolinedione) were obtained from duPont and Hitachi, respectively. PIQ coupler, an aluminum chelate primer, was also obtained from Hitachi. The primer and polyimides were applied by spin coating. Test substrates included metallized glass slides, metal sheet, and 3-inch diameter silicon wafers. 

S. Hayase, et al., Polymerization of cyclohexene oxide with aluminum complex silanol catalysts. 5. A catalytic activity dependence on the aluminum chelate structure. J. Polym. Sci. A Polym. Chem. 1982, 20(11), 3155-3165. 

A solution containing salicylic acid and an excess of aluminum nitrate develops an intense blue color when heated to about 100°C for 4-5 minutes. The aluminum chelates formed, when cleaved with HC1, give a 56% yield of phenolindophenol-3,3 -dicarboxylic acid and 5-hydroxysalicylic acid and 5-nitrosalicylic acid in 12% and 10% yields, respectively. Reaction scheme (XV) has been advanced to explain the products formed. 

Simultaneous oxidation of two alcohol functionalities can be performed in both saturated and unsaturated compounds. For example, oxidation of diol 24 was achieved in 30% yield to give diketone 25.33 Steric factors can play a large effect and can result in other reaction processes, such as rearrangement.3 Oxidation of saturated steroid 26 (R = C6H11O2) furnishes diketone 27, with inversion taking place at C-5,39 whereas oxidation of unsaturated steroid 28 (R = C8H17) also yields diketone 27, in which the double bond has been formally reduced.40 The oxidation of steroids containing two cis alcohols at the C-3 and C-5 positions is hindered by the formation of an unreactive aluminum chelate.41... 

Yokel RA (2002) Aluminum chelation principles and recent advances. Coord Chem Rev 228 97-113. 

Yokel RA, Datta AK and Jackson EG (1991) Evaluation of potential aluminum chelators in vitro by aluminum solubilization ability, aluminum mobilization from transferrin and the octanol/ aqueous distribution of the chelators and their complexes with aluminum. J Pharmacol Exp Ther 257 100-106. 

Chem. Descrip. Hydrated aluminum chelate of carminic acid, carmine lake-red powd. 

Chem. Descrip. Sodium salt of hydrated aluminum chelate ot carminic acid... 

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