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2,7-Naphthalene Ligand Compounds의 전기화학 및 분광학적 특성
최돈수,김무영,형경우,Choi, Don-Soo,Kim, Mu-Young,Hyung, Kyung-Woo 한국재료학회 2009 한국재료학회지 Vol.19 No.9
The compound of 2,6-Bis[(9-phenylcarbazolyl)ethenyl]naphthalene (BPCEN-1), 2-[6-{1-Cyano-2-(9-phenylcarbazoly)vinyl}naphthyl]-3-(9-phenylcarbazolyl)acrylonitrile (BPCEN-2), 2,6-Bis[{4-(1-naphthy l)phenylamino} styrenyl] naphthalene (BNPASN-1), 2-[6-{1-Cyano-2-(naphthylphenylaminophenyl) vinyl}naphthyl]-3-(naphthylphenylaminophenyl)acrylonitrile (BNPASN-2) was analyzed electrochemically and spectroscopically and can be obtained by bonding phenylcarbazolyl, naphthylphenylaminophenyl and -CN ligands to 2,7-naphthalene. The electrochemical and spectroscopic study resulted in the P-type (BPCEN-1, BNPASN-1) being changed to N-type (BPCEN-2, BNPASN-2) according to -CN bonding despite having the same structure. The value of band gap(Eg) was revealed to be small as HOMO had shifted higher and LUMO lower. The Eg value for naphthylphenylaminophenyl ligand was reduced because it has a smaller HOMO/LUMO value than that of phenylcarbazolyl from a structural perspective. The electrochemical HOMO/LUMO values for BPCEN-1, BPCEN-2, BNPASN-1, BNPASN-2 were measured to be 5.55eV / 2.83eV, 5.73eV / 3.06eV, 5.48eV / 2.78eV, and 5.53eV / 2.98eV, respectively. By -CN ligand, the UV max, Eg and PL max were shifted to longer wavelength in their spectra and the luminescence band could be also confirmed to be broad in the photoluminescence (PL) spectrum.
새로운 금속 킬레이트 착물 발광체의 합성과 전기화학적 특성 연구
박지영,최돈수,김영관,하윤경,Park, Jee Young,Choi, Don Soo,Kim, Young Kwan,Ha, Yun Kyoung 대한화학회 2000 대한화학회지 Vol.44 No.3
다층 구조로 이루어진 유기 전계발광소자(OELD)는 평판 디스플레이에 응용될 수 있으므로 활발히 연구되고 있다. 금속 킬레이트 착물은 발광층을 구성하는 물질로 개발되고 있는데 이 중 몇 가지는 효율적인 전계발광(EL) 특성을 가진다고 알려져 있다. 본 연구에서는 청색 발광을 나타내는 몇 가지 금속 킬레이트 착물들을 합성하였다. 리간드 quinaldat나 8-quinoline carboxylate를 사용하였고 중심 금속으로는 베릴륨과 아연을 도입하였다. 이 착물들에 대하여 FT-IR, MS/FAB, $^1$H-NMR, UVvis, 광발광(PL) 특 성을 고찰하였다. 또한 순환 전압전류법(CV)으로 이들 착물로 형성된 필름의 전기화학적 밴드갭(Eg), 전자친화도(EA), 이온화 에너지(IP)를 조사하였다. 앞에서 얻은 UV-vis의 에너지 홉수 파장과 순환 전압전류법으로 구한 전기화학적 밴드갭올 비교, 논의하였다. 이러한 연구는 새로운 고효율 금속 착물 발광체의 개발에 밑거름이 될 것이며, 현재 이들 화합물로 EL 소자를 제작하는 연구가 진행 중에 있다. Oganic electroluminescent devices (OELD) with multilayer structures have been studied actively for the application to a flat-panel display. Netal-chelate complexes hrboxylate. These complexes were characterized by FT-IR, MS/FAB, $^1$H-NMR, UV-vis and photoluminescence (PL). More importantly, the electrochemical gap (Eg), electron affinity(EA) and ionization potential (IP) of these complex films were investigated. Data from cyclic voltammetry(CV) were compared with the bandgap obtained from UV-vis and discussed. Further studies on the EL of these new materials are now in progress.
Zn(BOX)₂와 Zn(BTZ)₂의 광발광 특성 및 전계발광 특성에 대한 전기 화학적 연구
박지영(Jee Young Park),권오관(Oh Kwan Kwon),최돈수(Don Soo Choi),김영관(Young Kwan Kim),손병청(Byoung Chung Sohn),하윤경(Yun Kyoung Ha) 한국유화학회 2000 한국응용과학기술학회지 Vol.17 No.1
Organic Electroluminescent devices(OELD) consisted of multilayer structures have been studied for the application the application to flat-panel display. Metal-chelate complexes, zinc bis(2-(2-hydroxyphenyl)benzoxazolate) (Zn(BOX)₂) and zinc bis(2-(2-hydroxyphenyl)benzothiazolate) (Zn(BOX)₂), have been intensively investigated as an white-light emitting layer and recognized to have good electroluminescent(EL) properties. In this study, (Zn(BOX)₂) and (Zn(BTZ)₂) were synthesized and characterized by FT-IR, ¹H-NMR, UV-VIS and PL. Their EL properties were also studied and their ionization potential(IP) and electron affinity(EA) were also measured by cyclic voltammetry(CV).