• Bulletin of the Korean Chemical Society
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• v.7 no.3
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• pp.228-230
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• 1986

Diacetylene compound, 1,4-diphenyl-1,3-butadiyne, was photolyzed with 5-fluorouracil as a model reaction of the phototoxic conjugated poly-ynes with DNA or RNA and obtained a [2 + 2] photocycloadduct. The structure of the photoadduct was determined by spectral methods and compared with the [2 + 2] photoadducts of 1,4-diphenyl-1,3-butadiyne with tetramethylethylene and dimethyl fumarate.

• Bulletin of the Korean Chemical Society
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• v.32 no.5
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• pp.1475-1482
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• 2011

New spiro[benzo[c]fluorene-7,9'-fluorene] (SBFF)-based blue host materials, 9-phenyl-SBFF (BH-4P) and 5,9-diphenyl-SBFF (BH-6DP), were successfully prepared by spiro-formation of 9-phenyl-7H-benzo[c]fluoren-7-one with 2-bromobiphenyl via lithiation and reaction of 5,9-dibromo-SBFF with phenylboronic acid through the Suzuki reaction, respectively. Diphenyl-[4-(2-[1,1;4,1]terphenyl-4-yl-vinyl)-phenyl]-amine (BD-1) and N,N-diphenyl-N',N'-diphenyl-SBFF-5,9-diamine (BD-6DPA) were used as dopant materials. Blue OLEDs with the configuration ITO/N,N'-bis-[4-(di-m-tolylamino)phenyl]-N,N'-diphenylbiphenyl-4,4'-diamine (DNTPD)/bis[N-(1-naphthyl)-N-phenyl]benzidine (NPB)/host:5% dopant/SFC-137/Al-LiF were prepared from the two host materials doped with BD-1 and BD-6DPA dopants and the devices composed of BH-4P and BH-6DP doped with BD-6DPA showed blue EL spectra at 458 and 463 nm at 7 V and luminance efficiencies of 4.58 and 4.88 cd/A, respectively.

• Bulletin of the Korean Chemical Society
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• v.30 no.4
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• pp.863-868
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• 2009

New spiro[fluorene-7,9′-benzofluorene]-based blue host material, 5-phenyl-spiro[fluorene-7,9′-benzofluorene] (BH-1P), was successfully prepared by reacting 5-bromo-spiro[fluorene-7,9′-benzofluorene] (1) with phenyl boronic acid through the Suzuki reaction. 5-(N,N-Diphenyl)amino-spiro[fluorene-7,9′-benzofluorene] (BH-1DPA) and diphenyl-[4-(2-[1,1;4,1]terphenyl-4-yl-vinyl)-phenyl]amine (BD-1) were used as dopant materials. 2,5-Bis-(2',2"- bipyridin-6-yl)-1,1-diphenyl-3,4-diphenylsilacyclopentadiene (ET4) and Alq3 were used as electron transfer materials. Their UV absorption, photoluminescence and thermal properties were examined. The blue OLEDs with the configuration of ITO/DNTPD/$\alpha$-NPD/BH-1P:5% dopant/$Alq_3$ or ET4/LiF-Al prepared from the BH-1P host and BH-1DPA and BD-1 dopants showed a blue EL spectrum at 452 nm at 10 V and a luminance of 923.9 cd/$m^2$ with an efficiency of 1.27 lm/W at a current density of 72.57 mA/$cm^2$.

• Bulletin of the Korean Chemical Society
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• v.7 no.2
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• pp.116-120
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• 1986

Irradiation of 1,4-diphenyl-1,3-butadiyne and 5,5-dimethyl-1-phenyl-1,3-hexadiyne with methanol yields 1:1 polar addition products, [E]- and [Z]-1,4-diphenyl-1-methoxy-1-buten-3-yne and [E]- and [Z]-5,5-dimethyl-1-methoxy-1-phenyl-1-hexen-3-yne, respectively. These geometrical isomers were converted into each other reaching the photostationary state on irradiation with 300 nm UV light. The photoaddition reaction of 1,4-diphenyl-1,3-butadiyne and 5,5-dimethyl-1-phenyl-1,3-hexadiyne with methanol seems to proceed from the zwitterionic lowest excited state.

• Bulletin of the Korean Chemical Society
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• v.30 no.2
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• pp.383-388
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• 2009

Rates of solvolyses of diphenyl thiophosphorochloridate ($(PhO)_2$PSCl, 1) in ethanol, methanol, and aqueous binary mixtures incorporating ethanol, methanol, acetone and 2,2,2-trifluoroethanol (TFE) are reported. For four representative solvents, studies were made at several temperatures and activation parameters were determined. The 30 solvents gave a reasonably precise extended Grunwald-Winstein plot, correlation coefficient (R) of 0.989. The sensitivity values (l = 1.29 and m = 0.64) of diphenyl thiophosphorochloridate ($(PhO)_2$PSCl, 1) were similar to those obtained for diphenyl phosphorochloridate ($(PhO)_2$POCl, 2), diphenylphosphinyl chloride ($Ph_2$POCl, 3) and diphenylthiophosphinyl chloride ($Ph_2$PSCl, 4). As with the previously studied of 3~4 solvolyses, an $S_N$ pathway is proposed for the solvolyses of diphenyl thiophosphorochloridate (1). The activation parameters, ${\Delta}H^{\neq}\;(=11.6{\sim}13.9\;kcal{\cdot}mol^{-1})\;and\;{\Delta}S^{\neq}\; (=\;-32.1\;{\sim}\;-42.7\;cal{\cdot}mol^{-1}{\cdot}K^{-1})$, were determined, and they were in line with values expected for an $S_N$2 reaction. The large kinetic solvent isotope effects (KSIE, 2.44 in MeOH/MeOD and 3.46 in $H_2O/D_2$O) are also well explained by the proposed $S_N$2 mechanism.

• YAKHAK HOEJI
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• v.34 no.2
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• pp.117-121
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• 1990

$7{\beta}$-[4-Phenyl-5-(3.4.5-trimethoxyphenyl)-4H-1.2.4-triazol-3-yl]thioacetoamidocepharosporanic acid was synthesized by condensation of 7-Aminocephalosporanic acid (7-ACA) with [4-Phenyl-5-(3.4.5-trimethoxyphenyl)-4H-1.2.4-triazol-3-yl] thioacetylchloride. This compound was tested for antimicrobial activity in vitro against nine species of microorganisms. It showed remakable antibacterial activity against Bacillus subtilis, Micrococcus luteus, and Staphylococcus aureus.

• Bulletin of the Korean Chemical Society
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• v.8 no.5
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• pp.355-358
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• 1987

The reaction of t-butylithium with chlorodiphenylvinylsilane at low temperatures in hexane gave a 52% yield of the two isomeric 1,1,3,4-tetraphenyl-2,4-dineopenty-1,3-disilacyclo butanes mixture, formed by a head-to-tail dimerization of 1,1-diphenyl-2-neopentylsilene intermediate. In the presence of the trapping agents such as trimethylmethoxysilane and anthracene, the expected trapped adducts, 1-methoxy-l,l-diphenyl-2-trimethylsilyl-4,4-dimethyl-1-silapentane and 2,2-diphenyl-3-neopentyl-(5,6 : 7,8)-dibenzo-2-silabicyclo-(2.2.2)-octane, were obtained in 74% and 46% yields, respectively. These products were separated and their stereochemistry were assigned on the basis of $^1H$- and $^{13}C$-NMR data.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1103-1107
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• 2007

Highly efficient organic electroluminescent devices (OLEDs) based on 4,7- diphenyl-1, 10- phenanthroline (BPhen) as the electron transport layer (ETL), tris (8-hydroxyquinoline) aluminum ($Alq_3$) as the emission layer (EML) and N,$\acute{N}$-bis-[1-naphthy(-N,$\acute{N}$diphenyl-1,1´-biphenyl-4,4´-diamine)] (NPB) as the hole transport layer (HTL) were developed. The typical device structure was glass substrate/ ITO/ NPB/$Alq_3$/ BPhen/ LiF/ Al. Since BPhen possesses a considerable high electron mobility of $5\;{\times}\;10^{-4}\;cm^2\;V^{-1}\;s^{-1}$, devices with BPhen as ETL can realize an extremely high luminous efficiency. By optimizing the thickness of both HTL and ETL, we obtained a highly efficient OLED with a current efficiency of 6.80 cd/A and luminance of $1361\;cd/m^2$ at a current density of $20\;mA/cm^2$. This dramatic improvement in the current efficiency has been explained on the principle of charge balance.

• Journal of Pharmaceutical Investigation
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• v.18 no.2
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• pp.89-97
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• 1988

A series of novel water-soluble paracyclophanes containing two diphenyl ether skeletons and two bridging aliphatic chains of various length were designed and prepared to develop artificial host compounds which might provide efficient hydrophobic field. They were 1,5,19,23-tetraaza-12,30-dioxa[5,1.5.1] paracyclophane (6), 1,6,20,25-tetraaza-13,32-dioxa[6.1.6.1]paracyclophane (7), 1,7,21,27-tetraaza-14,34-dioxa[7.1.7.1]paracyclophane (8) and 1,8,22,29-tetraaza-15,36-dioxa[8.1.8.1]paracyclophane (9). As the corresponding acyclic analogue, 4,4'-dimethylaminodiphenyl ether (11) was synthesized for the comparative study of further host-guest interaction.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.508-508
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• 2013

백색 유기발광소자는 전색 디스플레이, 액정디스플레이의 backlights, 조명에서 잠재적인 가능성 때문에 디스플레이와 조명 업계에서 각광 받고 있다. 백색 유기발광소자를 제작하기 위한 방법으로 형광체를 이용한 백색 유기발광소자가 연구되고 있지만, 아직 색순도와 색좌표에 대한 연구가 필요하다. 본 연구에서는 무기물 형광체를 이용한 백색 유기발광소자의 전기적 특성과 광학적 특성을 관찰하였다. 광원으로 사용된 청색 유기발광소자에 적색과 녹색의 무기물 형광체를 결합하는 방법으로 백색 유기발광소자를 제작하였다. 광원으로 사용한 청색 유기발광소자의 양극으로는 투명전극으로 널리 쓰이고 있는 ITO를 사용하였고 정공 수송층으로는 N,N'-bis-(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine, 청색 발광층으로는 1,3-bis(carbazol-9-yl) benzene 호스트에 bis (3,5-difluoro-2-(2-pyridyl)phenyl)-(2-carboxypyridyl) iridium (III) 청색인광도 펀트를 사용하였다. 정공 저지층과 전자 수송층으로는 각각 2,9-dimethyl-4,7-diphenyl-1,10-phenanthorlene와 4,7-diphenyl-1,10-phenanthroline을 사용하고 전자 주입층으로는 lithium quinolate를 사용하였으며 음극으로는 Al을 사용하였다. 색 변환층으로 사용된 유기물 형광체는 sol-gel 방법으로 제작된 적색 형광체와 녹색 형광체를 사용하였다. Sol-gel 방법으로 제작된 형광체에 대한 주사현미경 측정 결과 입자의 표면이 고르고 크기가 작고 균일하였고, 높은 온도 열처리에 따라서 용매제가 대부분 제거되어 형광체 발광 특성이 잘 일어났음을 확인하였다. 제작한 백색유기발광소자에서 혼합비율에 따른 전계발광 특성 변화를 관찰하였다.