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Cho, Hoon-Je,Park, Moo-Jin,Hwang, Do-Hoon,Ahn, Taek,Hong, Ji-Won,Lee, Jonghee,Cho, Nam Sung,Shim, Hong-Ku Wiley Subscription Services, Inc., A Wiley Company 2009 Journal of polymer science Part A, Polymer chemist Vol.47 No.6
<P>Two novel types of polyfluorene copolymers containing siloxane linkages or distilbene moieties on their main-chains were synthesized by Ni(0)-mediated Yamamoto coupling polymerization. These polymers, designated P2Silo05, P2Silo15, PF-P02, and PF-P05 were prepared by copolymerization between 2,7-dibromo-9,9′-dihexylfluorene and bis(bromobenzene)-terminated disiloxane monomer (for P2Silo05 and P2Silo15) or dibromodistilbene monomer (for PF-P02 and PF-P05). All of the polymers were highly soluble in common organic solvents such as chloroform, toluene, and p-xylene. The glass transition temperatures of the polymers were between 92 and 113 °C, and the decomposition temperatures for a 5% weight loss (T<SUB>d</SUB>) were above 420 °C for all of the polymers, demonstrating high thermal stability. The molecular weight (M<SUB>w</SUB>) of the polymers ranged from 4.2 × 10<SUP>4</SUP> to 8.8 × 10<SUP>4</SUP>. The blue shift of the maximum in the UV-visible absorption was greater in polymers with a higher molar percentage of siloxane linkages or distilbene moieties than in homo poly (dihexylfluorene) (PDHF). However, the photoluminescence spectra of the polymers were similar to those of PDHF in terms of the onsets and patterns. Single-layer light-emitting diodes were fabricated with a configuration of ITO/PEDOT:PSS/polymers/Ca/Al. The maximum electroluminescence emission wavelengths of the polymers were 425–450 nm, corresponding to pure blue light. The CIE co-ordinates of the polyfluorenes containing siloxane linkages or distilbene moieties ranged from (0.21, 0.21) to (0.17, 0.10), indicating deeper blue light than that of PDHF {CIE co-ordinates of (0.25, 0.29)}, with P2Silo15 giving the deepest blue-light {CIE co-ordinates of (0.17, 0.10)}. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 1595–1608, 2009</P> <B>Graphic Abstract</B> <P>We have synthesized two types of polyfluorene copolymers containing siloxane linkages or distilbene moieties on their main-chains. To the best of our knowledge, P2Silo05 and P2Silo15 are the first polyfluorene copolymers that contain siloxane linkages on their main-chains. Interestingly, the CIE coordinates of the polyfluorenes containing siloxane linkages or distilbene moieties ranged from (0.21, 0.21) to (0.17, 0.10), indicating a deeper blue light emission than that of PDHF {CIE coordinates of (0.25, 0.29)}. <img src='wiley_img/0887624X-2009-47-6-POLA23259-gra001.gif' alt='wiley_img/0887624X-2009-47-6-POLA23259-gra001'> </P>
Synthesis and characterization of novel germanium-containing poly(p-phenylenevinylene) derivatives
Cho, Hoon-Je,Hwang, Do-Hoon,Lee, Jong-Don,Cho, Nam-Sung,Lee, Sang-Kyu,Lee, Jonghee,Jung, Young Kwan,Shim, Hong-Ku Wiley Subscription Services, Inc., A Wiley Company 2008 Journal of polymer science Part A, Polymer chemist Vol.46 No.3
<P>Novel blue-emitting germanium-containing poly(p-phenylenevinylene) (PPV) derivatives with well-defined conjugation lengths were synthesized via Wittig-condensation polymerizations. The polymers can be color-tuned by the introduction of various chromophores into the PPV-based polymer backbones. The photoluminescence (PL) spectra of the polymers, GePVK (containing carbazole moieties), GeMEH (containing dialkoxybenzene moieties), and GePTH (containing phenothiazine moieties), were found to exhibit blue, greenish blue, and green emissions, respectively. GePTH produces more red-shifted emission than GeMEH and GEPVK, resulting in green emission, and the solution and solid state PL spectra of GePVK consist of almost blue emission. The electroluminescence spectra of GeMEH and GePTH contain yellowy green and yellow colors, respectively. Interestingly, GePVK exhibits white emission with CIE coordinates of (0.33, 0.37) due to electroplex emission in the light-emitting diodes. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 979–988, 2008</P> <B>Graphic Abstract</B> <P>Three novel germanium-containing poly(p-phenylenevinylene) derivatives—GePVK, GeMEH, and GePTH—were successfully synthesized via Wittig-condensation polymerization. The polymers can be color-tuned by the introduction of various chromophores into the PPV-based polymer backbones. The photoluminescence spectra of the polymers, GePVK, GeMEH, and GePTH, were found to exhibit blue, greenish blue, and green emissions, respectively. <img src='wiley_img/0887624X-2008-46-3-POLA22441-gra001.gif' alt='wiley_img/0887624X-2008-46-3-POLA22441-gra001'> </P>
Eom, Jae-Hoon,Mi, Dongbo,Park, Moo-Jin,Cho, Hoon-Je,Lee, Jonghee,Lee, Jeong-Ik,Chu, Hye Yong,Shim, Hong-Ku,Hwang, Do-Hoon American Scientific Publishers 2009 Journal of nanoscience and nanotechnology Vol.9 No.12
<P>A polyhedral oligomeric silsesquioxane (POSS)-based electroluminescent nanoparticle, POSS-NPA, which contains anthracenenaphthyl chromophores on each of its eight arms, was easily prepared via the hydrosilylation reaction between octakis(dimethylsiloxy)silsesquioxane and allyl-functionalized 9-naphthalene-2-yl-10-phenyl anthracene chromophores. POSS-NPA was completely soluble in common organic solvents such as chloroform, THF, toluene, p-xylene, and chlorobenzene, and showed good film-forming properties on a quartz plate or an indium tin oxide (ITO) plate, i.e., it has good solution processing properties. The UV-visible absorption and the photoluminescence (PL) emission maxima of POSS-NPA in chlorobenzene solution were found to be 378 nm and 433 nm while those of POSS-NPA in the solid state were 379 and 464 nm, respectively. An electroluminescent (EL) device with the configuration of ITO/PEDOT:PSS/POSS-NPA (50 nm)/BAIq (40 nm)/LiF (1 nm)/Al (120 nm) was also fabricated and the blue light emission was successfully obtained.</P>
P442 : Melanoacanthoma with calcification in patient with arsenic intoxication: their relationship?
( Won Ku Lee ),( Gun Wook Kim ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hyun Chang Ko ),( Byung Soo Kim ),( Moon Bum Kim ),( Hoon Soo Kim ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.1
P253 : A clinical study of atopic eruption of pregnancy
( Won Ku Lee ),( Gun Wook Kim ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Byung Soo Kim ),( Moon Bum Kim ) 대한피부과학회 2014 대한피부과학회 학술발표대회집 Vol.66 No.2
Background: There is limited literature on clinical characteristics of specific dermatoses of pregnancy and their terminology has been confusing and misleading. Simplified classification is proposed with new terminology of atopic eruption of pregnancy (AEP). Objectives: To analyze and quantify the frequency and clinical characteristics of AEP. Methods: We retrospectively reviewed medical records of 46 patients who were diagnosed with AEP during recent 10 years. Results: The mean age of patients was 31.3 and the mean gestational age 19.3 weeks. In 93% of cases, AEP started before the third trimester of pregnancy. The most affected site was flexural surfaces of extremities, followed by neck and trunk. Twenty percentages of patients had a personal and/or family history of atopic eczema and/or elevated total IgE levels. The prognosis of patients with AEP was good as 83 % of patients were improved after delivery. Major fetal problems were not seen. Conclusion: AEP represents a new concept comprising several disease entities such as prurigo of pregnancy and eczema in pregnancy. We reclassified the pregnant patients visiting our hospital and analyzed clinical characteristics of AEP.
Case Reports : Erythrodermic Psoriasis Treated with Golimumab: A Case Report
( Won Ku Lee ),( Gun Wook Kim ),( Hyun Ho Cho ),( Won Jeong Kim ),( Je Ho Mun ),( Margaret Song ),( Hoon Soo Kim ),( Hyun Chang Ko ),( Moon Bum Kim ),( Byung Soo Kim ) 대한피부과학회 2015 Annals of Dermatology Vol.27 No.4
Erythrodermic psoriasis (EP) is a very severe variant of psoriasis whose management poses a challenge to physicians, as currently available therapies often provide unsatisfactory results. Many biologics have been used to treat chronic plaque psoriasis, the most common form of psoriasis; however, their effectiveness for EP is poorly understood. A recently developed biologic, golimumab, has been extensively studied for the treatment of moderate-to-severe active rheumatoid arthritis, psoriatic arthritis, active ankylosing spondylitis, and chronic plaque psoriasis. However, no clinical trials have been performed for EP. Here, we report the case of a 32-year-old man who presented with severe psoriasis that previously failed to respond satisfactorily to methotrexate, cyclosporine, retinoid, narrow-band ultraviolet B phototherapy, and topical agents (i.e., steroids and calcipotriol). Skin lesions worsened progressively and developed into erythroderma. Psoriatic arthritis was also detected. Conventional therapies lacked efficacy. Therefore, we administered golimumab 50 mg. The skin lesions improved significantly according to the Psoriasis Area and Severity Index score after the first administration; lesions improved further throughout the treatment course. Although additional studies are required to fully evaluate the efficacy and safety of golimumab, this agent may be an alternative treatment strategy for some patients with recalcitrant EP. (Ann Dermatol 27(4) 446∼449, 2015)