• 한국응용과학기술학회지
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• 제21권1호
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• pp.76-88
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• 2004

The catalytic oxidation reaction of several cycloolefins in $CH_2Cl_2$ have been investigated using non-redox metalloporphyrin(M = Ga(III), In(III) and TI(III) complexes as a catalyst and sodium hypochlorite as a terminal oxidant. Porphyrins were $(p-CH_3O)$TPP, $(p-CH_3)$TPP, TPP, (p-F)TPP, (p-Cl)TPP and $(F_{20})$TPP (TPP=5,10,15,20-tetraphenyl-21H,23H-porphyrin) and olefins were cyclopentene, cyclohexene, cycloheptene and cyclooctene, The substrate conversion yield(%) was investigated according to the radius effect of non-redox metal ion, substituent effect and hindrance effect of metalloporphyrin. The conversion yield of cycloolefin was in the following order : $C_5$ < $C_6$ < $C_7$ = $C_8$.

• 대한화학회지
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• 제39권5호
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• pp.364-370
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• 1995

비산화-환원 금속인 Ga(III), In(III), TI(III)을 포함하는 금속 포르피린을 촉매제로 NaOCl을 산화제로 하여 올레핀의 촉매적 산화반응을 $CH_2Cl_2$에서 연구하였다. 포르피린은 $(p-CH_3O)TPP,\;(p-CH_3)TPP,\;TPP,\;(p-F)TPP,\;(p-Cl)TPP $그리고 $(F_20)TPP$를 사용하였다. 올레핀은 $(p-CH_3O)-,\;(p-CH_3)-,\;(p-H)-,\;(p-F)-,\;(p-Cl)-,\;(p-Br)styrene$ 그리고 cyclopentene, cyclohexene을 사용하였다. 올레핀 산화반응에서 기질의 전환율(%)은 금속 포르피린 및 기질의 치환기 효과와 중심 금속이온 성질에 따라 고찰하였다. TPP 치환기에 따른 전환율의 변화는 $p-CH_3O$ < $p-CH_3$ < H < p-F < p-Cl 순서로 증가하였다. 이러한 증가는 TPP의 $4{\sigma}$값의 증가 순서와 일치하였다. 기질의 치환기에 따른 전환율의 변화는 $p-CH_3O$ > $p-CH_3$ > H > p-Cl > p-Br 순서로 치환기의 ${\sigma}^+$값이 증가할수록 오히려 감소하였다. 올레핀의 산화 반응에서 In(III)-, Tl(III)-포르피린은 Ga(III)-포르피린에 비하여 높은 촉매 활성을 나타내었다.

• Current Photovoltaic Research
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• 제2권1호
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• pp.18-27
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• 2014

Dye-sensitized solar cells (DSSCs), developed two decades ago, are considered to be an attractive technology among various photovoltaic devices because of their low cost, accessible dye chemistry, ease of fabrication, high power conversion efficiency, and environmentally friendly nature. A typical DSSCs consists of a dye-coated $TiO_2$ photoanode, a redox electrolyte, and a platinum (Pt)-coated fluorine-doped tin oxide (FTO) counter electrode. Among them, redox electrolytes have proven to be extremely important in improving the performance of DSSCs. Due to many drawbacks of iodide electrolytes, many research groups have paid more attention to seeking other alternative electrolyte systems. With regard to this, one-electron outer sphere redox shuttles based on cobalt complexes have shown promising results: In 2014, porphyrin dye (SM315) with the cobalt (II/III) redox couple exhibited a power conversion efficiency of 13% in DSSCs. In this review, we will provide an overview and perspectives of cobalt redox electrolytes in DSSCs.