• Bulletin of the Korean Chemical Society
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• 제19권7호
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• pp.760-766
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• 1998

Fluorination of alkenyllithium reagents can be accomplished in acceptable yield under conditions which give rise to low competitive alkene formation. These reactions are abetted by the use of the low temperature soluble, mild fluorinating agent N-fluoro-N-tert-butylbenzenesulfonamide; "simpler" fluorinating reagents such as F2, XeF2 or FClO3 failed to give acceptable amounts of the fluoroolefin with these alkenyllithiums.

• Bulletin of the Korean Chemical Society
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• 제7권5호
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• pp.362-366
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• 1986

Synthesis and hydrolysis of aromatic diketimines of triaryl type were investigated by the action of aryl organometallics on the three isomers of phthalonitrile. The reactions of organometallic reagents, prepared from bromobenzene, o-bromotoluene and o-bromoanisol, with iso- and terephthalonitrile proceeded in normal way. Decomposition of the addition complex with dry ammonia, methanol or water gave six diketimines, which could be hydrolysed to the corresponding diketones. Reactions of phthalonitrile with the organometallic reagent were different from the other isomers, so that the decomposition and hydrolysis of the addition complex did not give diimines and the corresponding aromatic diketones.

• 대한화학회지
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• 제35권5호
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• pp.592-595
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• 1991

• Bulletin of the Korean Chemical Society
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• 제28권4호
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• pp.685-688
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• 2007

• 통합자연과학논문집
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• 제1권3호
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• pp.250-253
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• 2008

New issues arise as to surface characterization, quantification and interface formation. Surface and interface control of CdSe nanocrystal systems, one of the most studied and useful nanostructures. Semiconductor quantum dots (QDs) have been the subject of much interest for both fundamental reseach and technical applications in recent years, due mainly to their strong size dependent properties and excellent chemical processibility. In this dissertation, the synthesis of CdSe quantum dots were synthesized by pyrolysis of high-temperature organometallic reagents. In order to modify the size and quality of quantum dots, we controlled the growth temperature and the relative amount of precursors to be injected into the coordinating solvent. Moreover, an effective surface passivation of monodisperse nanocrystals was achieved by overcoating them with a higher-band-gap material. Synthesized CdSe quantum dots were studied to evaluate the optical, electronic and structural properties using UV-absorption, and photoluminescence measurement.

• 대한화학회지
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• 제17권4호
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• pp.286-297
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• 1973

폴리플루오로알켄닐리튬 化合物들이 1,2-dihalopolyfluorocycloalkenes와 알킬리튬試藥과의 交換反應에 依하여 合成되었다. 수은, 비소와 디메틸게르마늄할로겐화물과의 여러 가지 反應이 著述되어 있고 또 이 化合物들의 化學的性質에 대하여 考察하였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.198-198
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• 2011

Organocatalysis is a relatively new and popular area within the field of chiral molecule synthesis. It is one of the main branches of enantioselective synthesis with enzymatic and organometallic catalysis. In recent years, immense high quality studies on catalysis by chiral secondary amines were reported. These progresses instantly led to different organocatalytic activation concepts, so thousands of researchers from academia and the chemical industry are currently involved in this field and new ideas, new approaches, and creative thinking have been rapidly emerged. Organocatalysts, some of which are natural products, appear to solve the problems of metal catalysts. Compared to metal-based catalysis, they have many advantages including savings in cost, time, and energy, easier experimental procedure, and reduction of chemical waste. These benefits originate from the following factors. First, organocatalysts are generally stable in oxygen and water in the atmosphere, there is no need for special equipments or experimental techniques to operate under anhydrous or anaerobic conditions. Second, organic reagents are naturally available from biological materials as single enantiomers that they are easy and cheap to prepare which makes them suitable for small-scale to industrial-scale reactions. Third, in terms of safety related catalysis, small organic molecules are non-toxic and environmentally friendly. Therefore, the purpose of this research is to develop novel synthetic methods and design for various organocatalyst. Furthermore, it is expected that these organocatalysts can be applied to a variety of asymmetric reactions and study the transition state of these reactions using a metal sulface. Here, we report the synthesis of unprecedented organocatalysts, proline and pyrrolidine derivatives with quaternary carbon center.