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ION SENSOR
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, (2016/07/05)
Provided is a compound useful as a polyvalent metal ion sensor for calcium ions or the like which is capable of reversible sensing and of being integrated into a device, and an ion sensor using the compound. A copolymer comprising: a repeating unit (A) ha
Formulation for spray-drying large porous particles
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, (2008/06/13)
Particles having a tap density less than about 0.4 g/cm3 are formed by spray drying from a colloidal solution including a carboxylic acid or salt thereof, a phospholipid, a divalent salt and a solvent such as an aqueous-organic solvent. The colloidal solu
Processes for preparation of 2-alkyl-2adamantyl esters
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, (2008/06/13)
A magnesium halide salt of a 2-alkyl-2-adamantanol is reacted with a carboxylic acid halide such as acrylic chloride or the like in the presence of a tertiary amine to produce a 2-alkyl-2-adamantyl ester (the first invention). A 2-alkyl-2-adamantanol is reacted with a carboxylic acid such as acrylic acid or the like in the presence of an acid catalyst such as concentrated sulfuric acid or the like and a drying agent composed of an acidic or neutral inorganic compound (e.g. magnesium sulfate) which is a solid at ordinary temperature in a dried state or of a water-absorbing high-molecular compound, to produce a 2-alkyl-2-admantyl ester (the second invention). The above ester is important as a raw material for a resist for semiconductor production.