• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 춘계학술대회 논문집 디스플레이 광소자 분야
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• pp.121-124
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• 2000

Achieving red light-emitting diodes with high quantum and luminous efficiency is required to fabricate the full-color organic electroluminescence display. In this work, we report that devices with 2.3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine palladium (II) (PdOEP), doped into tris(8-Hydroxyquinolinato)-aluminum (III) (Alq3) show a narrow deep red emission (670nm). In addition, PdOEP has been used as host material in which red dyes such as 4-(Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) doped in order to fabricate efficient red-emitting diodes.

• 한국산업융합학회 논문집
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• 제9권4호
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• pp.331-336
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• 2006

An efficient synthesis of 3,4-dihydro-2H-pyrans is achieved by $Ag_2CO_3$/celite mediated reaction of 1,3-dicarbonyl compounds with vinyl ether in moderate yields. This method has been applied to the synthesis of 3,4-dihydro-2H-pyranochromens and 3,4-dihydro-2H-benzochromen. 3,4-Dihydro-2H-pyranochromens were easily converted to 4H-pyranochromens by elimination of ethoxy group. The structures of these compound were identified by IR and $^1H$ NMR-Spectra.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 1994년도 춘계학술대회 and 제3회 신약개발 연구발표회
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• pp.218-218
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• 1994

화합물 9-methoxy-6-oxo-3,4,4a,5-tetrahydro-3-hydroxy-2,2-dimethyl-naphtho[1,2〕pyran(1)의 전구물질인 7-methoxy-4-oxo-2-prenyl-1-tetralol을 다음과 같은 방법으로 합성하였다. 7-Methoxy-$\alpha$-tetralone에 LDA를 처리한 후, prenyl bromide를 반응시켜 7-methoxy-2-prenyl-1-tetralone을 제조했다 (수율 66%). 7-Methyl-2-prenyl-1-tetralone을 L-seleclride로 환원하여 cis-2-prenyl-1-tetralol을98% 수율로 얻었다. cis-2-Prcnyl-1-tetralol을pyridine 존재하에서 acetic anhydride로서acetylation한 다음 PDC로 산화시켜 4-acetoxy-3-prenyl-1-tetralone을 합성하였다 (수율 45%). cis-4-Acetoxy-3-prenyl-1-tetralone을 가수분해하여 cir-7-methoxy-4-oxo-2-prenyl-1-tenalol을 합성하였다. 6,7-Dimethoxy-4-oxo-2-prenyl-1-letralol도 동일한 방법으로 합성하였다.

• Applied Biological Chemistry
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• 제51권4호
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• pp.305-308
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• 2008

Seven compounds (1-7) were isolated from n-hexane and EtOAc-soluble fractions of the roots of Erigeron annuus by repeated silica gel column chromatography. They were identified as simiarenol (1), ${\beta}$-sitosterol (2), daidzein (3), apigenin (4), apigenin 7-O-${\beta}$-D-glucuronide (5), 3-hydroxy-pyran- 4-one (6), and ${\beta}$-sitosterol glucoside (7) on the basis of physical and spectroscopic data. Compounds 1 and 3 were isolated for the first time from the Erigeron species.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.927-930
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• 2001

We studied the electrical properties of Copper(II)-phthalocyanine (Cu-Pc) as a hole transport layer in organic light emitting devices (OLEDs). OLEDs were constructed with ITO/CU-Pc/triphenyl-diamine (TPD)/tris-(8-hydroxyquinoline) aluminum ( Alq$_3$) + 4- (Dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM)/Al. It was consisted of a thin DCM in Alq$_3$emission layer. We observed that the change of recombination zone was moved toward the cathode as the hole mobility increased due to the heat-treatment temperature of Cu-Pc layer increased.

• 한국연초학회지
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• 제19권2호
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• pp.151-158
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• 1997

Burley leaf tobacco extracts has been heated at loot for 2 hours and changes in non-volatile fructosazines and volatile components were investigated. Major changes for the heat treatment with corn syrup of burley leaf tobacco extracts were as follows, increases in the contents of 2,5-deoxyfructosazine and 2,5-fructosazine that is produce for the heating reaction of sugar and ammonia, production of pyraEine compounds, such as 2,6-dimethyl pyrazine,2,4-dimethyl pyrazine, ethrnyl pyrazine, methylethyl pyraxine, trimethyl pyrazine, 2-ethenyl-5-methyl pyrazine, 2-acetyl parazine and 2-acetyl-3-methyl pyrazine, increases in the content of furfuryl alcohol derived from sugar degrad ation, production of 2,5-dimethyl-4-hydroxy-3(2H)-furanone and 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one derived from thermal degradation of Amadori compounds.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.944-947
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• 2003

We report efficient white organic electroluminescent devices consisting of a blue-emitting layer of 9,10-bis[(2",7"-di-t-butyl)-9',9"-spirobifluorenyl]anthracene (TBSA) and a red-emitting layer of 4-dicyanomethylene-2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo[i,j]quinolizin-8-yl)vinyl]-4H-pyran) (DCM2) doped into 4,4'bis[N-(1-napthyl)-N-phenyl-amino]-biphenyl (${\alpha}-NPD$). The device shows the CIE coordinates of (0.32, 0.37). The external quantum efficiency is about 3.4 % and the luminous efficiency is about 3.9 lm/W at luminance of 100 $cd/m^{2}$. The maximum luminance is about 45,400 $cd/m^{2}$ at 11.5 V.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.914-916
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• 2003

Novel red organic electroluminescent (EL) dye, RED was developed for an application to the emission layer of EL device. Well known red material DCJTB was also used for comparison. Two kinds of devices were fablicated; one is ITO/ CuPc / TPD / 0.5% RED-1 in Alq3/ Alq3/ Li20/ Al and the other is ITO/ CuPc /TPD / 0.5% DCJTB in Alq3/Alq3/ Li20 / Al. External quantum efficiency of the EL device with RED was two times higher than that of the device with DCJTB. The maximum EL peak was detected at 635nm in the RED EL device.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.948-951
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• 2003

The electroluminescence (EL) properties were studied in organic light-emitting diodes with a red fluorescent dye, 4- (dicyanomethylene)- 2- tert-butyl-6 (1,1,7,7-tetramethyljulolidyl-9-enyl)- 4H- pyran (DCJTB) doped into tris-(8-hydroxyquinoline)aluminum ($Alq_{3}$), rubrene and the mixed matrix of $Alq_3$ and rubrene. The device with DCJTB doped into the $Alq_{3}$:rubrene mixed host shows an efficient red emission from DCJTB with a negligible EL emission from $Alq_{3}$ and a lower EL onset voltage compared to the device with DCJTB doped into the $Alq_{3}$ only host. The quantum efficiency is almost temperature-independent for the device with the $Alq_3:rubrene$ mixed host. The results indicate that recombination of injected electrons and holes occurs on rubrene and subsequent energy transfer to DCJTB dominates in the device with the $Alq_{3}$:rubrene mixed host.

• Archives of Pharmacal Research
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• 제12권3호
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• pp.201-206
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• 1989

The reaction of acetoacetanilide (1) with the $\alpha$-cyanocinnamonitrile derivatives 2 yielded the Michael adducts 4 which could be converted into the pyrano [2, 3, -c] pyrazole derivatives 5 via their reaction with hydrazine hydrate. Cyclisation of 4 afforded the derivatives 10. The pyranopyrazoles 9 reacted with different activated nitrile derivatives (3a-c) to give the pyrano [2, 3-c] pyridine derivatives 13. 16 and 19 respectively. The biological activity of the synthesised heterocyclic derivatives was investigated and discussed.