摘要:
A method of organic deposition comprises a first step of supporting a substrate on which a scintillator is formed using at least three sample support needles rising from a turntable, a second step of introducing the turntable supporting the substrate into a CVD chamber, and a third step of depositing organic CVD film over the entire surface of the substrate including the scintillator formed on it.
摘要:
The present invention provides an improved process for preparing modafinil, whereby it may be isolated in high purity by a single crystallization. The process produces modafinil free of sulphone products of over-oxidation and other byproducts. The invention further provides new crystalline Forms II-VI of modafinil and processes for preparing them. Each of the new forms is differentiated by a unique powder X-ray diffraction pattern. The invention further provides pharmaceutical compositions containing novel modafinil Forms II-IV and VI.
摘要:
Es wird eine Verfahren zur Herstellung von regelmäßigen Kristallen aus in einem Lösungsmittel gelösten Feststoff vorgeschlagen, wobei je nach positiver oder negativer Löslichkeit des Feststoffes in dem jeweiligen Lösungsmittel die Lösung unter Bildung des Feststoffkristallisates bis unterhalb ihrer Sättigungstemperatur abgekühlt bzw. bis oberhalb ihrer Sättigungstemperatur erhitzt und das Feststoffkristallisat abgetrennt wird. Zur Erzeugung weitestgehend fehlstellenfreier Kristalle mit einer homogenen und engen Partikelgrößenverteilung wird die Lösung in einer laminaren Scherströmung (Couette-Strömung) abgekühlt bzw. erhitzt. Ferner wird eine Vorrichtung zur Durchführung eines solchen Verfahrens vorgeschlagen, welche einen zylindrischen Kristallisationsbehälter zur Aufnahme der Lösung und ein hierzu koaxial unter Bildung eines radialen Ringraums angeordnetes und relativ zu diesem rotierbares zylindrisches Innenteil umfaßt, wobei der Kristallisationsbehälter und/oder das Innenteil temperierbar sind.
摘要:
Disclosed is a method of crystallizing α-L-aspartyl-L-phenylalanine methyl ester, which is a sweetening agent substituting sugar and commonly referred to as aspartame. An aspartame solution is sprayed and droplets of the solution fall downward. Cold airflow is blown to the falling droplets of the aspartame solution to cool them. The aspartame dissolved in the droplets crystallizes, and the slurry including the aspartame crystals and the remaining solution is collected for further processes. Also disclosed is a crystallizer for cooling crystallizing the aspartame solution with this method. The crystallizer has an atomizer for spraying the aspartame solution supplied thereto and an air inlet and an air outlet. The cold air is blown into the crystallizer through the air inlet, cools the droplets of the aspartame solution, and is discharged through air outlet.
摘要:
A layered structure comprises in sequence a substrate, and coated on at least a portion of at least one surface of said substrate a first layer comprising a crystalline uniaxially oriented organic compound, and at least one additional layer comprising a crystalline uniaxially oriented organic compound which is epitaxially vapor deposited on said first layer. A method for providing the layered structure of the invention comprises the steps of (a) providing a substrate, (b) depositing and crystallographically uniaxially orienting a first organic (seed) layer onto the substrate, (c) depositing from the vapor phase at least one additional organic layer onto the oriented seed layer to provide a layered structure wherein the at least one additional layer is epitaxial with the seed layer. t
摘要:
A polymorph of a phthalocyanine, designated M-phthalocyanine, has been prepared in an environment of at most 0.1 G. In a further aspect, a process is disclosed for preparing novel organic films comprising a closed chamber physical vapor transport (PVT) in a low gravity environment.
摘要:
A charge transfer complex of donor and acceptor molecules is formed by a vapor phase reaction, and after formation the complex is subjected to thermal annealing in order to optimize the proportions of donor and acceptor molecules. By virtue of this method, the formation speed is significantly increased.
摘要:
A method for producing an organic crystal is disclosed. One embodiment comprises maintaining a capillary tube (2) containing a fused liquid (3) of an organic crystal material and having a fused liquid reservoir (31) at one end thereof at a temperature not less than the fusion point of the organic crystal material together with the fused liquid reservoir, reducing the temperature of the fused liquid in the fused liquid reservoir to precipitate seed crystals, and then slowly cooling the capillary tube successively from the end toward the other end to allow a single crystal to grow from the seed crystal in the capillary tube. Because of the large quantity of the fused liquid, a seed crystal can be formed and allowed to grow even from a fused liquid of an organic crystal material which hardly crystallizes in the form of a fused liquid. Another embodiment comprises charging a solution of an organic crystal material in a capillary tube under heat, rapidly reducing the temperature of one end of the capillary tube to precipitate polycrystals, and then slowly cooling the capillary tube successively from the end toward the other end to allow a single crystal to grow from the polycrystal as a seed crystal. A seed crystal grows from a solution of an organic crystal material under control of crystal form to obtain a single crystal which has no inversion symmetry center, is free from lattice defect or rearrangement, and less causative of a laser beam loss.
摘要:
A polymorph of a phthalocyanine, designated M-phthalocyanine, has been prepared in an environment of at most 0.1 G. In a further aspect, a process is disclosed for preparing novel organic films comprising a closed chamber physical vapor transport (PVT) in a low gravity environment.