• 공업화학
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• 제33권2호
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• pp.159-165
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• 2022

WO₃ 광촉매의 광분해 성능을 증대시키기 위하여 산소결핍자리 생성을 유도하기 위한 불소 도핑을 수행하였다. 불소 도핑을 위하여 플라즈마 불소화와 직접 기상 불소화를 진행하였으며, 두 가지 방법으로 불소화한 WO₃ 광촉매의 광분해 성능을 비교하기 위하여 메틸렌블루 염료 분해 성능을 평가하였다. 플라즈마 불소화한 WO₃ 광촉매와 직접 기상 불소화한 WO₃ 광촉매의 산소결핍자리는 각 14.65 및 18.59%로 미처리 WO₃ 광촉매 대비 각 23, 56% 증가하였으며, WO₃ 광촉매의 산소결핍자리가 증가함에 따라 메틸렌블루 염료분해 성능 역시 미처리 WO₃ 광촉매 대비 각 1.7, 3.4배 증가한 것을 확인하였다. 또한 불소 도핑 후 밴드갭 에너지는 각 2.95 eV에서 2.64, 2.45 eV로 감소한 것을 확인하였다. 이러한 결과로 미루어 보아 직접 기상 불소화 공정이 플라즈마 불소화 공정과 비교하여 WO₃ 광촉매의 활성을 증대시키는데 유리한 공정인 것으로 사료된다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2001년도 춘계학술발표회요약집
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• pp.371.1-371
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• 2001

• Rapid Communication in Photoscience
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• 제1권2호
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• pp.61-61
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• 2012

• 한국막학회:학술대회논문집
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• 한국막학회 2003년도 추계 총회 및 학술발표회
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• pp.172-175
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• 2003

• Bulletin of the Korean Chemical Society
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• 제33권3호
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• pp.881-884
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• 2012

We report a quantum chemical study of an extremely efficient nucleophilic aromatic fluorination in molten salts. We describe that the mechanism involves solvent anion interacting with the ion pair nucleophile $M^+F^-$(M = Na, K, Rb, Cs) to accelerate the reaction. We show that our proposed mechanism may well explain the excellent efficiency of molten salts for SNAr reactions, the relative efficacy of the metal cations, and also the observed large difference in rate constants in two molten salts $(n-C_4H_9)_4N^+\;CX_3SO_3^-$, (X=H, F) with slightly different sidechain ($-CH_3$ vs. $-CF_3$).

• 대한방사성의약품학회지
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• 제3권2호
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• pp.129-133
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• 2017

Since carbon-fluorine (C-F) bonds play a key role to improve bioavailability and lipophilicity, they have found commonly in pharmaceuticals, radiopharmaceuticals, agrochemicals, and material science. Advances on the efficient method to introduce fluorine to complex organic molecules are mainly results of development of fluorination reagents and transition metal catalysts. In this mini-review, we want to emphasize two representative nucleophilic fluorinating reagents regarding carbon-fluorine bond formation, which were developed in the mid-2000s.

• Bulletin of the Korean Chemical Society
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• 제28권12호
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• pp.2435-2441
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• 2007

The catalytic enantioselective electrophilic fluorinations of active methane compounds promoted chiral palladium complexes have been developed. Treatment of α-cyano acetates and α-cyanoalkylphosphonates with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding α-cyano-α-fluorinated adducts in high yields with excellent enantiomeric excesses (up to 99% ee). These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture.

• Archives of Pharmacal Research
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• 제21권3호
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• pp.338-343
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• 1998

$2^1$-Fluorohexopyranosyl nucleosides 1a and 1b which contained a bioisosteric double bond and a fluorine were synthesized in 12 steps, starting from D-galactose. During diethylaminosulfur trifluoride (DAST) fluorination, retention of stereochemistry was observed through the participation of methoxy or chloro group at the 6-posiition of the purine base. The final nucleosides 1a and 1b were found to be inactive against HIV-1 and HSV-1,2.

• Bulletin of the Korean Chemical Society
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• 제30권4호
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• pp.829-836
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• 2009

The catalytic enantioselective electrophilic fluorinations of active methine compounds promoted chiral palladium complexes have been developed. Treatment of $\beta$-keto phosphonates and $\beta$-ketoesters with N-fluorobenzenesulfonimide as the fluorine source under mild reaction conditions afforded the corresponding $\alpha$-fluorinated adducts in high yields with excellent enantiomeric excesses (up to 99% ee). These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture.

• 대한방사성의약품학회지
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• 제2권1호
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• pp.51-55
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• 2016

Organofluorine compounds have become increasingly important as pharmaceuticals, radiopharmaceuticals, agrochemicals, and material science. Recent advances on the efficient introduction of fluorine to organic molecules are mainly results of development of transition metal catalysts and fluorination reagents. Among the various fluorination reagents, we have been interested in developing more efficient sulfur-based deoxyfluorinating reagents. Here we report various electronic properties of five popular sulfur-based deoxyfluorinating reagents using density functional theory calculation. We believe that the theoretical study on the reagents will assist the rational design of new deoxyfluorinating reagents.