http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Wee, Kyung‐,Ryang,Han, Won‐,Sik,Cho, Dae Won,Kwon, Soonnam,Pac, Chyongjin,Kang, Sang Ook WILEY‐VCH Verlag 2012 Angewandte Chemie Vol.124 No.11
<P><B>Eine einleuchtende Verbindung</B>: Eine neue Klasse von Donor‐Akzeptor‐ Systemen – Carbazolylaryl‐substituierte <I>ortho</I>‐Carborane – wurde aus den entsprechenden Acetylenen und Decaboran hergestellt. Sie zeigen ein ungewöhnliches Verhalten der angeregten Zustände, indem sie, anders als die entsprechenden <I>para</I>‐ und <I>meta</I>‐Verbindungen, Elektronentransfers eingehen (siehe Bild).</P>
Wee, Kyung-Ryang,Han, Won-Sik,Kim, Ju-Eun,Kim, Ae-Li,Kwon, Soonnam,Kang, Sang Ook Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.4
<P>A series of bulky aryl-substituted asymmetric anthracene blue host materials, 9-(2-naphthyl)-10-(3-(1-naphthyl)phenyl)anthracene, where phenyl was varied from H (5a), Me (5b), Ph (5e), and 1-Naph (5f) at the 6-position and Me (5c) at the 2-position, was synthesized by Suzuki coupling reaction between 10-(2-naphthyl)anthracene-9-boronic acid and 1-(3-iodophenyl)naphthalene derivatives. A less bulky aryl-substituted anthracene, 9-(2-naphthyl)-10-(2,5-diphenyl)phenyl)anthracene (5d), was also synthesized for comparison. All asymmetric anthracenes showed high glass transition temperatures in the range of 84–153 °C. The photophysical and electrochemical properties in solution showed that the substituent at the 10-positions of the anthracene unit did not influence the blue emission of 420 nm and HOMO–LUMO energy level (5.5–2.5 eV). However, a gradual decrease of bathochromic shift in solid state PL was observed from the increaseg of the substituent bulkiness, exhibiting 5e (18 nm) ≤ 5f (19 nm) < 5c (25 nm) ≤ 5b (26 nm) < 5a (30 nm) < 5d (41 nm), respectably. When 5a was used as a blue host material in the multilayered device structure of ITO/DNTPD/NPD/host:dopant (9%)/PyPySPyPy/LiF/Al, enhanced OLED device performance was observed, showing a luminous current efficiency of 9.9 cd A<SUP>−1</SUP>, power efficiency of 6.3 lm W<SUP>−1</SUP> at 20 mA cm<SUP>−2</SUP>, deep blue color coordinates of (0.14, 0.18), and a 932 h device lifetime at <I>L</I><SUB>0</SUB> = 3000 cd m<SUP>−2</SUP>.</P> <P>Graphic Abstract</P><P>A series of 10-position aryl-substituted asymmetric anthracenes was synthesized and characterized. By employing these asymmetric anthracenes as the host material of chrysene dopant-based blue OLEDs, the reduced efficiency roll off at high luminance and stable lifetime were observed. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0jm02877k'> </P>
김동현,Won Ryang Wee,Jin Hak Lee,김미금 대한안과학회 2010 Korean Journal of Ophthalmology Vol.24 No.6
Purpose: To compare the intraoperative performances and postoperative outcomes of cataract surgery performed with longitudinal phacoemulsification and torsional phacoemulsification in moderate and hard cataracts. Methods: Of 85 patients who had senile cataracts, 102 eyes were operated on using the Infiniti Vision System. Preoperative examinations (slit lamp examination, mean central corneal thickness, and central endothelial cell counts) were performed for each patient. Cataracts were subdivided into moderate and hard, according to the Lens Opacities Classification System III grading of nucleus opalescence (NO). Eyes in each cataract group were randomly assigned to conventional and torsional phaco-mode. Intraoperative parameters, including ultrasound time (UST), cumulative dissipated energy (CDE), and the balanced salt solution plus (BSSP) volume utilized were evaluated. Best corrected visual acuity (BCVA) was checked on postoperative day 30; mean central corneal thickness and central endothelial cell counts were investigated on postoperative days 7 and 30. Results: Preoperative BCVA and mean grading of NO showed no difference in both groups. Preoperative endothelial cell count and central corneal thickness also showed no significant difference in both groups. In the moderate cataract group, the CDE, UST, and BSSP volume were significantly lower in the torsional mode than the longitudinal mode, but they did not show any difference in the hard cataract group. Torsional group showed less endothelial cell loss and central corneal thickening at postoperative day seven in moderate cataracts but showed no significant differences, as compared with the longitudinal group, by postoperative day 30. Conclusions: Torsional phacoemulsification showed superior efficiency for moderate cataracts, as compared with longitudinal phacoemulsification, in the early postoperative stage.