Browsing by Issue Date, starting with "2005-10-21"

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虎打武松
(2005-10-21)
管管
Interplay between intra- and interligand charge transfer with variation of the axial N-heterocyclic ligand in osmium(II) pyridylpyrazolate complexes: Extensive color tuning by phosphorescent solvatochromism
(2005-10-21)
Li, SW
;
Cheng, YM
;
Yeh, YS
;
Hsu, CC
;
Chou, PT
The rational design and syntheses of a new series of Os-II complexes with formula [Os(fppz)(2)(CO)(L)] (1: L=4-dimethylaminopyridine; 2: L=pyridine; 3: L = 4,4'bipyridine; 4: L=pyridazine; 5: L = 4-cyanopyridine), bearing two (2-pyridyl)pyrazolate ligands (fppz) together with one carbonyl and one N-heterocyclic ligand at the axial positions are reported. Single-crystal X-ray diffraction studies of, for example, 2 reveal a distorted octahedral geometry in which both fppz ligands reside in the equatorial plane with a trans configuration and adopt a bent arrangement at the metal center with a dihedral angle of similar to 23 degrees, while the carbonyl and pyridine ligands are located at the axial positions. Variation of the axial N-heterocyclic ligand leads to remarkable changes in the photophysical properties as the energy gap and hence the phosphorescence peak wavelength can be tuned. For complexes 1 and 2 the solvent-polarity-independent phosphorescence originates from a combination of intraligand (3)pi-pi* ((ILCT)-I-3) and metal-to-ligand charge transfer transitions ((MLCT)-M-3). In sharp contrast, as supported by cyclic voltammetry measurements and theoretical calculations, complexes 3-5 exhibit mainly ligand-to-lilgand charge transfer (LLCT) transitions, resulting in a large dipolar change. The phosphorescence of complexes 3-5 thus exhibits a strong dependence on the polarity of the solvent, being shifted for example, from 560 (in C6H12) to 665 nm (in CH3CN) and from 603 (in C6H12) to 710 nm (in CH3CN) for complexes 3 and 5, respectively. The results clearly demonstrate that a simple, straightforward derivatization of the axial N-heterocyclic ligand drastically alters the excitation properties per se from intraligand charge transfer (ILCT) to LLCT transitions. The latter exhibit remarkable LLCT phosphorescence solvatochromism so that a broad range of color tunability can be achieved.
Synthesis of rod-coil diblock copolymers by ATRP and their honeycomb morphologies formed by the 'breath figures' method
(2005-10-24)
Lin, CL
;
Tung, PH
;
Chang, FC
;
應用化學系
;
Department of Applied Chemistry
We have synthesized rod-coil diblock PPQ-b-PMMA copolymers by using the versatile atom-transfer radical polymerization method and have characterized them by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The methyl ketone-terminated rod-coil diblock PMMA copolymer has a higher value of T-g because of its syndiotactic-like structure, and a higher decomposition temperature than does the PMMA homopolymer. The presence of the PPQ block tends to retard the early decomposition of the PMMA chain. A regularly porous, honeycomb-structured film was prepared from the dichloromethane solution of the diblock copolymers under a flow of moist air. The diameters of the spherical pores can be controlled in the range from 0.8 to 3 mu m by modifying both the rod-coil copolymers' relative molecular weights and the casting conditions. The wall thickness of the film is varied linearly with the relative molecular mass (M-r). (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis, thermal properties, and specific interactions of high T-g increase in poly(2,6-dimethyl-1,4-phenylene oxide)-block-polystyrene copolymers
(2005-10-24)
Kuo, SW
;
Huang, CF
;
Tung, PH
;
Huang, WJ
;
Huang, JM
We have synthesized a series of block copolymers of poly(2,6-dimethyl- 1,4-phenylene oxide) and polystyrene (PPO-b-PS copolymer) by atom transfer radical polymerization. The PS content in these copolymer systems was determined by using infrared spectroscopy, thermal gravimetric analysis, and solution and solid-state NMR spectroscopy; good correlations exist between these characterization methods. DSC analyses indicated that the PPO-b-PS copolymers have higher glass transition temperatures than do their corresponding PPO/PS blends. Our FTIR and solid-state NMR spectroscopic analyses suggest that the PPO-b-PS copolymers possess stronger specific interactions that are responsible for the observed relatively higher values of T-g. We found one single dynamic relaxation from the dynamic mechanical analysis, which implies dynamic homogeneity exists in the PPO-b-PS copolymer; this result is consistent with the one single proton spin-lattice relaxation time observed in the rotating frame [T-1 rho(H)] during solid state NMR spectroscopic analysis. In addition, the 2D FTIR spectroscopy reveals evidence for the stronger interactions between segments of PPO and PS through the formation of pi-cation complexes. (c) 2005 Elsevier Ltd. All rights reserved.
Ab initio molecular orbital study of 1,3,5-triazine derivatives for phosphorescent organic light emitting devices
(2005-10-24)
Chu, TY
;
Ho, MH
;
Chen, JF
;
Chen, CH
;
電子物理學系
Novel triplet host materials 2,4,6-tris(diarylamino)-1,3,5-triazine derivatives (TRZ1-TRZ4) have been reported and from which TRZ2 as a host for Ir(ppy)(3) was particularly useful in producing high efficiency phosphorescent organic light emitting diodes (OLEDs). This Letter reports the molecular orbital and energy level of these derivatives determined by ab initio calculation. The calculated triplet bandgap energy of TRZ1 has been found to be larger than that of TRZ2 and the TRZ1 molecules and has the lowest dipole moment which infers the highest carrier mobility. Therefore, TRZ1 has the potential to be a superb triplet host material and electron transport material. (c) 2005 Elsevier B.V. All rights reserved.
1.3 mu m quantum dot vertical-cavity surface-emitting laser with external light injection
(2005-10-27)
Peng, PC
;
Chang, YH
;
Kuo, HC
;
Tsai, WK
;
Lin, G
A 1.3 mu m quantum dot vertical-cavity surface-emitting laser (QD VCSEL) with external light injection is presented, having been experimentally demonstrated. The QD VCSEL is fabricated on GaAs substrate. The 3 dB frequency response of the QD VCSEL based on the TO-Can package is enhanced from the free-running 1.75 to 7.44 GHz with the light injection technique.
Developing a multi-dimensional instrument for assessing students' epistemological views toward science
(2005-10-28)
Tsai, CC
;
Liu, SY
;
教育研究所
;
師資培育中心
;
Institute of Education
The purpose of this study was to describe the development and validation of an instrument to identify various dimensions of scientific epistemological views (SEVs) held by high school students. The instrument included five SEV dimensions (subscales): the role of social negotiation on science, the invented and creative reality of science, the theory-laden exploration of science, the cultural impacts on science, and the changing features of science. Six hundred and thirteen high school students in Taiwan responded to the instrument. Data analysis indicated that the instrument developed in this study had satisfactory validity and reliability measures. Correlation analysis and in-depth interviews supported the legitimacy of using multiple dimensions in representing student SEVs. Significant differences were found between male and female students, and between students' and their teachers' responses on some SEV dimensions. Suggestions were made about the use of the instrument to examine complicated interplays between SEVs and science learning, to evaluate science instruction, and to understand the cultural differences in epistemological views of science.
青少年保健相關工作人員教育訓練
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
時間：94年10月26日（週三 8：30～16：40）地點：關渡醫院10樓第一會議室（北投區關渡里知行路225巷12號）對象：對青少年保健及輔導有興趣之家長、學校教職員、相關從業人員研習內容：青春期生理變化、溝通技巧、青少年常見之情緒行為問題、兒童青少年精神疾病新知、注意力不足過動症新知、自閉症新知。
編輯報告
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
＜焦點新聞＞報導：一、2005年全國醫學盃球類聯誼賽二、94學年度第1學期擴大週會三、哈佛大學教授Professor Joseph Bonventre蒞校演講四、薩爾瓦多媒體記者參訪育成中心五、NCO之夜─陽明音樂祭六、「2005年偏遠地區海外衛生醫療調查」成果心得發表會七、通識中心「莎士比亞趴趴走」校園讀劇示範講座＜自然誌＞唭哩岸山蛾誌-鬼臉天蛾：陽明以人類生命科學研究聞名，而在校園內(陽明大學，包含唭哩岸山、軍艦岩)也有一種蛾類以「壽命」命名的，叫做鬼臉天蛾 Acherontia lachesis (Fabricius, 1798)。
通識中心「莎士比亞趴趴走」校園讀劇示範講座
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
通識中心推出一系列共三場的藝文講座（請做連結），首場「莎士比亞趴趴走校園讀劇示範講座」，在10月19日中午於二教樓223教室舉行，現場準備有美味的三明治.，並請到擁有豐富劇場表演經驗，台灣大學戲劇系專任講師姚坤君老師為大家介紹讀劇的樂趣。這是由文建會主辦「國際讀劇節」的系列活動之一，希望能藉由校園巡迴演講，將讀劇的美好，深植校園。
94學年度第1學期擴大週會
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
學校於10月13日在活動中心大禮堂，舉行94學年度第一學期擴大週會。週會分為三部份，首先是頒發各項榮譽獎學金，再由高毓儒主任秘書代表校長致詞，最後由張平宜女士，為大家進行一場專題演講，講題為「四川麻瘋村的希望小學」。
2005年全國醫學盃球類聯誼賽
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
全國性醫學盃球類聯誼賽，從1963年在台大校區舉辦「第一屆醫學盃」足球聯誼賽起，便開創了持續42年的全國醫學院校，運動聯誼交流盛會
Temperature-dependent carrier dynamics in metallic carbon nanotubes
(2005-10-31)
Chiu, CW
;
Chiu, YH
;
Shyu, FL
;
Chang, CP
;
Chuu, DS
The low energy states in metallic armchair carbon nanotubes can decay by the electron-electron Coulomb interactions with the intraband and the interband excitations. The inelastic scattering rate is very sensitive to the changes in the electronic distribution and the state energy (or the wavevector). The temperature dependence is linear for the Fermi-momentum state. Such dependence is hardly affected by the nanotube radius and the Fermi energy. The electron-electron interactions are more efficient in electronic deexcitations compared with the electron-phonon interactions. The calculated results are roughly consistent with the experimental measurements from the time-resolved photoemission spectroscopy. (c) 2005 Elsevier B.V. All rights reserved.
教育部人文社會科學史料典籍研讀計畫申請案
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
教育部人文社會科學史料典籍研讀計畫受理申請至94年11月15日止，詳參網址 http://hss.edu.tw 或聯絡人:賴姿諭,電話:23976704 ...
哈佛大學教授Professor Joseph Bonventre蒞校演講
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
醫學系微生物學科於10月14日邀請哈佛大學教授Joseph Bonventre蒞校演講。Joseph Bonventre教授先於行政大樓二樓接待室，面會醫學院李建賢院長，並進行簡短的交流。
93學年度車輛通行證自94年10月20日起失效
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
主旨：本校原93學年度車輛通行證自94年10月20日起失效，尚未申請94學年度通行證者速至事務組提出申請，請轉所屬師生知照。
陽明新鮮人圖書館資訊之旅
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
為使陽明新鮮人在日後求學過程中，能有效查尋所需資料，並充份掌握學校提供的資源與服務，圖書館每年都會舉辦「大一新鮮人圖書館之旅」以及「研究生資訊之旅」的活動，讓同學在資料查詢的過程中，能收事半功倍之效。
Heteroleptic cyclometalated iridium(III) complexes displaying blue phosphorescence in solution and solid state at room temperature
(2005-10-31)
Yang, CH
;
Li, SW
;
Chi, Y
;
Cheng, YM
;
Yeh, YS
A series of heteroleptic Ir(III) metal complexes 1-3 bearing two N-phenyl-substituted pyrazoles and one 2-pyridyl pyrazole (or triazole) ligands were synthesized and characterized to attain highly efficient, room-temperature blue phosphorescence. The N-phenylpyrazole ligands, dfpzH = 1-(2,4-difluorophenyl)pyrazole, fpzH = 1-(4-fluorophenyl)-pyrazole, dfmpzH = 1-(2,4-difluorophenyl)-3,5-dimethylpyrazole, and fmpzH = 1-(4-fluorophenyl)-3,5-dimethylpyrazole, show a similar reaction pattern with respect to the typical cyclometalated (C boolean AND N) chelate, which utilizes its orthosubstituted phenyl segment to link with the central Ir(III) atom, while the second 2-pyridylpyrazole (or triazole) ligand, namely, fppzH = 3-(trifluoromethyl)-5-(2-pyridyl)pyrazole, fptzH = 3-(trifluoromethyl)-5-(2-pyridyl)triazole, and hptzH = 3-(heptafluoropropyl)-5-(2-pyridyl)triazole, undergoes typical anionic (N boolean AND N) chelation to complete the octahedral framework. X-ray structural analyses on complexes [(dfPZ)(2)Ir(fppz)] (1a) and [(fMPZ)(2)Ir(hptz)] (3d) were established to confirm their molecular structures. Increases of the pi pi* energy gaps of the Ir(III) metal complexes were systematically achieved with two tuning strategies. One involves the substitution for one or two fluorine atoms at the N-phenyl segment or the introduction of two electron-releasing methyl substituents at the pyrazole segment of the H(CAN) ligands. Alternatively, we have applied the more electron-accepting triazolate in place of the pyrazolate segment for the third (N boolean AND N)H ligand, Our results, on the basis of steady-state, relaxation dynamics, and theoretical approaches, lead to a conclusion that, for complexes 1-3, the weakening of iridium metal-ligand bonding strength in the T-1 state plays a crucial role for the fast radiationless deactivation. For the case of [(fMPZ)(2)Ir(hptz)] (3d), a thermal deactivation barrier of 4.8 kcal/mol was further deduced via temperature-dependent studies. The results provide a theoretical basis for future design and synthesis of the corresponding analogues suited to blue phosphorescent emitters.
心肺復甦術訓練課程
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
衛生保健組針對三種對象：未曾參加急救訓練者、對急救課程有興趣者，與持有急救證書認證但過期者（證書期限為二年）的心肺復甦術訓練課程，於活動中心表演廳展開為期兩週的訓練課程。
國立實驗國樂團NCO之夜─陽明音樂祭
(國立陽明大學, 2005-10-31)
陽明電子報編輯小組
在今年三月初，國立實驗國樂團（National Chinese Orchestra）開始安排下半年的校園巡演計畫，而本校學務處、通識中心及國樂社，得知此事之後，便積極地與國立實驗國樂團洽談前來陽明大學演出的可能性