Skip navigation

DSpace

機構典藏 DSpace 系統致力於保存各式數位資料(如:文字、圖片、PDF)並使其易於取用。

點此認識 DSpace
DSpace logo
English
中文
  • 瀏覽論文
    • 校院系所
    • 出版年
    • 作者
    • 標題
    • 關鍵字
    • 指導教授
  • 搜尋 TDR
  • 授權 Q&A
    • 我的頁面
    • 接受 E-mail 通知
    • 編輯個人資料
  1. NTU Theses and Dissertations Repository
  2. 理學院
  3. 化學系
請用此 Handle URI 來引用此文件: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/67516
完整後設資料紀錄
DC 欄位值語言
dc.contributor.advisor楊吉水(Jye-Shane Yang)
dc.contributor.authorYu-Hsuan Huen
dc.contributor.author胡雨旋zh_TW
dc.date.accessioned2021-06-17T01:35:39Z-
dc.date.available2025-08-25
dc.date.copyright2020-09-16
dc.date.issued2020
dc.date.submitted2020-08-25
dc.identifier.citation1. Banks, J. W.; Batsanov, A. S.; Howard, J. A. K.; O'Hagan, D.; Rzepa, H. S.; Martin-Santamaria, S., The preferred conformation of α-fluoroamides. J. Chem. Soc., Perkin Trans. 2 1999, 2409-2411.
2. Reichenbaecher, K.; Suess, H. I.; Hulliger, J., Fluorine in crystal engineering-'the little atom that could'. Chem. Soc. Rev. 2005, 34, 22-30.
3. Coates, G. W.; Dunn, A. R.; Henling, L. M.; Ziller, J. W.; Lobkovsky, E. B.; Grubbs, R. H., Phenyl-perfluorophenyl stacking interactions: topochemical [2+2] photodimerization and photopolymerization of olefinic compounds. J. Am. Chem. Soc. 1998, 120, 3641-3649.
4. Berger, R.; Resnati, G.; Metrangolo, P.; Weber, E.; Hulliger, J., Organic fluorine compounds: a great opportunity for enhanced materials properties. Chem. Soc. Rev. 2011, 40, 3496-3508.
5. Thalladi, V. R.; Weiss, H.-C.; Bläser, D.; Boese, R.; Nangia, A.; Desiraju, G. R., C−H···F Interactions in the Crystal Structures of Some Fluorobenzenes. J. Am. Chem. Soc. 1998, 120, 8702-8710.
6. Ramasubbu, N.; Parthasarathy, R.; Murray-Rust, P., Angular preferences of intermolecular forces around halogen centers: preferred directions of approach of electrophiles and nucleophiles around carbon-halogen bond. J. Am. Chem. Soc. 1986, 108, 4308-4314.
7. Percec, V.; Glodde, M.; Johansson, G.; Balagurusamy, V. S. K.; Heiney, P. A., Transformation of a Spherical Supramolecular Dendrimer into a Pyramidal Columnar Supramolecular Dendrimer Mediated by the Fluorophobic Effect. Angew. Chem., Int. Ed. 2003, 42, 4269-4269.
8. Zhu, L.; Tong, F.; Salinas, C.; Al-Muhanna, M. K.; Tham, F. S.; Kisailus, D.; Al-Kaysi, R. O.; Bardeen, C. J., Improved Solid-State Photomechanical Materials by Fluorine Substitution of 9-Anthracene Carboxylic Acid. Chem. Mater. 2014, 26, 6007-6015.
9. Jin, M.; Sumitani, T.; Sato, H.; Seki, T.; Ito, H., Mechanical-Stimulation-Triggered and Solvent-Vapor-Induced Reverse Single-Crystal-to-Single-Crystal Phase Transitions with Alterations of the Luminescence Color. J. Am. Chem. Soc. 2018, 140, 2875-2879.
10. Qi, Y.; Ding, N.; Wang, Z.; Xu, L.; Fang, Y., Mechanochromic Wide-Spectrum Luminescence Based on a Monoboron Complex. ACS Appl. Mater. Interfaces 2019, 11, 8676-8684.
11. Nakane, Y.; Takeda, T.; Hoshino, N.; Sakai, K.-i.; Akutagawa, T., ESIPT Fluorescent Chromism and Conformational Change of 3-(2-Benzothiazolyl)-4- hydroxy-benzenesulfonic acid by Amine Sorption. J. Phys. Chem. C 2018, 122, 16249-16255.
12. Zhao, Q.; Xu, W.; Sun, H.; Yang, J.; Zhang, K. Y.; Liu, S.; Ma, Y.; Huang, W., Tunable Electrochromic Luminescence of Iridium (III) Complexes for Information Self‐Encryption and Anti‐Counterfeiting. Adv. Opt. Mater. 2016, 4, 1167-1173.
13. Li, M.; Yuan, Y.; Chen, Y., Acid-Induced Multicolor Fluorescence of Pyridazine Derivative. ACS Appl. Mater. Interfaces 2018, 10, 1237-1243.
14. Park, D.-H.; Heo, J.-M.; Jeong, W.; Yoo, Y. H.; Park, B. J.; Kim, J.-M., Smartphone-Based VOC Sensor Using Colorimetric Polydiacetylenes. ACS Appl. Mater. Interfaces 2018, 10, 5014-5021.
15. Lee, J.; Oh, S.; Pyo, J.; Kim, J.-M.; Je, J. H., A light-driven supramolecular nanowire actuator. Nanoscale 2015, 7, 6457-6461.
16. Han, D.-D.; Zhang, Y.-L.; Ma, J.-N.; Liu, Y.-Q.; Han, B.; Sun, H.-B., Light-Mediated Manufacture and Manipulation of Actuators. Adv. Mater. 2016, 28, 8328-8343.
17. Kimoto, A.; Tokita, A.; Horino, T.; Oshima, T.; Abe, J., Fast Photochromic Polymers Carrying [2.2]Paracyclophane-Bridged Imidazole Dimer. Macromolecules 2010, 43, 3764-3769.
18. Ma, M.-J.; Yang, X.-D.; Guo, R.-Y.; Ma, S.; Cui, J.-W.; Zhang, J., A Zn(II)-mediated pyridinium-bearing coordination polymer: Structure, photochromism and photo-tunable luminescence switching. Inorg. Chem. Commun. 2019, 105, 1-3.
19. Lendlein, A.; Jiang, H.; Jünger, O.; Langer, R., Light-induced shape-memory polymers. Nature 2005, 434, 879-882.
20. Donovan, B. R.; Matavulj, V. M.; Ahn, S.-k.; Guin, T.; White, T. J., All-Optical Control of Shape. Adv. Mater. 2019, 31, 1805750.
21. Hatano, E.; Morimoto, M.; Imai, T.; Hyodo, K.; Fujimoto, A.; Nishimura, R.; Sekine, A.; Yasuda, N.; Yokojima, S.; Nakamura, S.; Uchida, K., Photosalient Phenomena that Mimic Impatiens Are Observed in Hollow Crystals of Diarylethene with a Perfluorocyclohexene Ring. Angew. Chem., Int. Ed. 2017, 56, 12576-12580.
22. Naumov, P.; Chizhik, S.; Panda, M. K.; Nath, N. K.; Boldyreva, E., Mechanically Responsive Molecular Crystals. Chem. Rev. 2015, 115, 12440-12490.
23. Yu, Q.; Aguila, B.; Gao, J.; Xu, P.; Chen, Q.; Yan, J.; Xing, D.; Chen, Y.; Cheng, P.; Zhang, Z.; Ma, S., Photomechanical Organic Crystals as Smart Materials for Advanced Applications. Chem. Eur. J. 2019, 25, 5611-5622.
24. Al-Kaysi, R. O.; Tong, F.; Al-Haidar, M.; Zhu, L.; Bardeen, C. J., Highly branched photomechanical crystals. Chem. Commun. 2017, 53, 2622-2625.
25. Kitagawa, D.; Kobatake, S., Photoreversible current ON/OFF switching by the photoinduced bending of gold-coated diarylethene crystals. Chem. Commun. 2015, 51, 4421-4424.
26. Kohlschütter, V.; Haenni, P., Zur Kenntnis des graphitischen Kohlenstoffs und der Graphitsäure. Z. Anorg. Allg. Chem. 1919, 105, 121-144.
27. Cohen, M. D.; Schmidt, G. M. J., Topochemistry. Part I. A survey. J. Chem. Soc. 1964, 1996-2000.
28. Biradha, K.; Santra, R., Crystal engineering of topochemical solid state reactions. Chem. Soc. Rev. 2013, 42, 950-67.
29. Ihmels, H.; Leusser, D.; Pfeiffer, M.; Stalke, D., Solid-State Photolysis of Anthracene-Linked Ammonium Salts: The Search for Topochemical Anthracene Photodimerizations. Tetrahedron Lett. 2000, 56, 6867-6875.
30. Kim, T.; Zhu, L.; Al-Kaysi, R. O.; Bardeen, C. J., Organic Photomechanical Materials. ChemPhysChem 2014, 15, 400-414.
31. Mondal, B.; Ghosh, A. K.; Mukherjee, P. S., Reversible Multistimuli Switching of a Spiropyran-Functionalized Organic Cage in Solid and Solution. J. Org. Chem. 2017, 82, 7783-7790.
32. Ito, M.; Ubukata, T., Photoconstruction of a microrelief in a photochromic crystalline spirooxazine film. Chem. Lett. 2019, 48, 32-35.
33. Fukaminato, T.; Kobatake, S.; Kawai, T.; Irie, M., Three-dimensional erasable optical memory using a photochromic diarylethene single crystal as the recording medium. Proc. Jpn. Acad. B Phys. Biol. Sci. 2001, 77, 30-35.
34. Li, N.-Y.; Liu, D.; Ren, Z.-G.; Lollar, C.; Lang, J.-P.; Zhou, H.-C., Controllable Fluorescence Switching of a Coordination Chain Based on the Photoinduced Single-Crystal-to-Single-Crystal Reversible Transformation of a syn-[2.2] Metacyclophane. Inorg. Chem. 2018, 57, 849-856.
35. Sun, Q.; Ma, J.; Yuan, S.; Wang, Y.; Yu, G.; Xue, S.; Yang, W., Remarkable photo-induced crystal transition accompanying with room temperature phosphorescence change. Dyes Pigm. 2019, 170, 107600-107604.
36. Chung, J. W.; You, Y.; Huh, H. S.; An, B.-K.; Yoon, S.-J.; Kim, S. H.; Lee, S. W.; Park, S. Y., Shear- and UV-Induced Fluorescence Switching in Stilbenic π-Dimer Crystals Powered by Reversible [2 + 2] Cycloaddition. J. Am. Chem. Soc. 2009, 131, 8163-8172.
37. Morimoto, M.; Irie, M., A Diarylethene Cocrystal that Converts Light into Mechanical Work. J. Am. Chem. Soc. 2010, 132, 14172-14178.
38. Kim, T.; Al-Muhanna, M. K.; Al-Suwaidan, S. D.; Al-Kaysi, R. O.; Bardeen, C. J., Photoinduced Curling of Organic Molecular Crystal Nanowires. Angew. Chem., Int. Ed. 2013, 52, 6889-6893.
39. Zhu, L.; Al-Kaysi, R. O.; Bardeen, C. J., Reversible Photoinduced Twisting of Molecular Crystal Microribbons. J. Am. Chem. Soc. 2011, 133, 12569-12575.
40. Al-Kaysi, R. O.; Müller, A. M.; Bardeen, C. J., Photochemically Driven Shape Changes of Crystalline Organic Nanorods. J. Am. Chem. Soc. 2006, 128, 15938-15939.
41. Naumov, P.; Sahoo, S. C.; Zakharov, B. A.; Boldyreva, E. V., Dynamic Single Crystals: Kinematic Analysis of Photoinduced Crystal Jumping (The Photosalient Effect). Angew. Chem., Int. Ed. 2013, 52, 9990-9995.
42. Uchida, E.; Azumi, R.; Norikane, Y., Light-induced crawling of crystals on a glass surface. Nat. Commun. 2015, 6, 7310
43. VR, S.; Shalaev, V., Aromatic-Hydrocarbons: New Aryn-2,3-Dehydrotriptycene in Reaction with Anthracene. Dokl. Akad. Nauk. SSSR, Ser. Khim. 1974, 216, 110-112.
44. Yang, J.-S.; Yan, J.-L., Central-ring functionalization and application of the rigid, aromatic, and H-shaped pentiptycene scaffold. Chem. Commun. 2008, 1501-1512.
45. Matsunaga, Y.; Yang, J.-S., Multicolor Fluorescence Writing Based on Host-Guest Interactions and Force-Induced Fluorescence-Color Memory. Angew. Chem. Int. Ed. 2015, 54, 7985-9.
46. Lin, C.-J.; Liu, Y.-H.; Peng, S.-M.; Shinmyozu, T.; Yang, J.-S., Excimer–Monomer Photoluminescence Mechanochromism and Vapochromism of Pentiptycene-Containing Cyclometalated Platinum(II) Complexes. Inorg. Chem. 2017, 56, 4978-4989.
47. Hsu, L.-Y.; Maity, S.; Matsunaga, Y.; Hsu, Y.-F.; Liu, Y.-H.; Peng, S.-M.; Shinmyozu, T.; Yang, J.-S., Photomechanochromic vs. mechanochromic fluorescence of a unichromophoric bimodal molecular solid: multicolour fluorescence patterning. Chem. Sci. 2018, 9, 8990-9001.
48. Kuo, C.-Z.; Hsu, L.-Y.; Chen, Y.-S.; Maity, S.; Liu, Y.-H.; Peng, S.-M.; Kang, K. V.; Shinmyozu, T.; Goto, K.; Yang, J.-S., Alkyl Chain Length- and Polymorph-Dependent photomechanochromic fluorescence of anthracene photodimerization in molecular crystals: roles of the lattice stiffness. Chem. Eur. J. 10.1002/chem. 202000353
49. Lohr, A.; Swager, T. M., Stabilization of the nematic mesophase by a homogeneously dissolved conjugated polymer. J. Mater. Chem. 2010, 20, 8107-8111.
50. Yang, J.-S.; Swager, T. M., Fluorescent Porous Polymer Films as TNT Chemosensors: Electronic and Structural Effects. J. Am. Chem. Soc. 1998, 120, 11864-11873.
51. Yang, J.-S.; Yan, J.-L.; Hwang, C.-Y.; Chiou, S.-Y.; Liau, K.-L.; Gavin Tsai, H.-H.; Lee, G.-H.; Peng, S.-M., Probing the Intrachain and Interchain Effects on the Fluorescence Behavior of Pentiptycene-Derived Oligo(p-phenyleneethynylene)s. J. Am. Chem. Soc. 2006, 128, 14109-14119.
52. Kotwica, K.; Bujak, P.; Data, P.; Krzywiec, W.; Wamil, D.; Gunka, P. A.; Skorka, L.; Jaroch, T.; Nowakowski, R.; Pron, A.; Monkman, A., Soluble Flavanthrone Derivatives: Synthesis, Characterization, and Application to Organic Light-Emitting Diodes. Chem. Eur. J. 2016, 22, 7978-7986.
53. Matsumoto, H.; Nishimura, Y.; Arai, T., Excited-state intermolecular proton transfer dependent on the substitution pattern of anthracene–diurea compounds involved in fluorescent ON1–OFF–ON2 response by the addition of acetate ions. Org. Biomol. Chem. 2017, 15, 6575-6583.
54. Repine, J. T.; Johnson, D. S.; White, A. D.; Favor, D. A.; Stier, M. A.; Yip, J.; Rankin, T.; Ding, Q.; Maiti, S. N., Synthesis of monofluorinated 1-(naphthalen-1 -yl)piperazines. Tetrahedron Lett. 2007, 48, 5539-5541.
55. Fan, W.; Liu, C.; Li, Y.; Wang, Z., Fluoroalkyl-modified naphthodithiophene diimides. Chem. Commun. 2017, 53, 188-191.
dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/67516-
dc.description.abstract刺激響應材料是具有智能行為的材料,它能夠感知外界環境如外力、溫度、蒸氣、光等刺激而產生可被偵測的變化量。以光作為刺激源的響應材料近年來備受關注。本實驗室近年發展了不同碳鏈長度修飾的五苯荑,並以蒽作為螢光團的化合物P(Cn),其於固態下展現同質多晶形性,分別為Y型、G型、B型。在光刺激下Y型與G型皆會進行二聚合,並展現放光變色的現象;B型則沒有二聚合的發生。二聚合與晶格剛硬度的交互作用造成光機械應力,進而影響蒽蒽間的交互作用,使得晶體展現獨特的光色變化。此為文獻中前所未見的光致機械力放光變色 (photomechanofluorochromism, PMFC) 現象。
本論文根據本實驗室近年研究成果及文獻資料,分別在五苯荑的長碳鏈上或蒽上進行氟取代,設計出化合物P(F)、An(F)、An(F)P(F)。前兩種化合物展現同質多晶形性,為G型及B型,而後者化合物只具有G型。在光刺激下,三種化合物晶體呈現不盡相同的光色變化,其中P(F)的G型晶體形狀更隨著光刺激而有顯著變化,經紫外光照射後晶體彎離光源。對此進行晶體結構分析,來探討氟取代基在分子排列及晶體放光顏色上、形狀上所造成的影響。再進一步結合晶體結構、光物理參數、二聚合程度等數據,探討PMFC和光機械效應的現象,並進而提出在光刺激下晶體變化機制。以期氟取代基對固態刺激響應材料性質的影響對日後科學家在分子設計上有所幫助。
zh_TW
dc.description.abstractStimuli-responsive materials are materials with intelligent behavior. They can sense the external stimuli such as external force, temperature, steam, light, and so on, by producing detectable signals. Among those stimuli, light have received much attention in recent years. In our previous work, we have synthesized P(Cn), a monosubstituted anthracene as the chromophore with pentiptycene moiety modified with different length of alkyl chain. They exhibited polymorphism in the solid state, including yellow fluorescence (Y form), green fluorescence (G form) and blue fluorescence (B form). Under light irradiation, the Y form and the G form underwent dimerization along with the change of fluorescence color while B form was unreactive. The fluorescence color change resulted from the interaction between dimerization and lattice rigidity. The interaction caused photomechanical stress, which in turn affected the interaction between anthracene moieties, making the crystal exhibit unique fluorescence color change. We named this “photomechanofluorochromism”, abbreviated as PMFC.
Based on our research and the previous observation of others’ research, we designed P(F), An(F), An(F)P(F) derivatives by fluorine substitution on the alkyl chain or on anthracene. P(F) and An(F) exhibited polymorphism including a G form and a B form. An(F)P(F) only exhibited a G form. Under UV light irradiation, their crystals showed different fluorescence color change, and the shape of the P(F) G form crystal deformed significantly. The P(F) G form crystal bent away from the light source after irradiation. Therefore, the crystal structure analysis was carried out to investigate the effects of the fluoro substituents on the molecular arrangement, the fluorescence color, and the crystal shape. We further combined the data of crystal structure, photophysical parameters, and degree of dimerization to propose a mechanism to explain the change of crystal under light irradiation. By studying on these derivatives, we hope that the fluoro-substituent effect on the properties of solid-state fluorescent materials can pave the way for the molecular design toward better understanding of the PMFC properties.
en
dc.description.provenanceMade available in DSpace on 2021-06-17T01:35:39Z (GMT). No. of bitstreams: 1
U0001-1508202016541100.pdf: 14830175 bytes, checksum: 38a2cb2f0413e60616112b5a8bbc5275 (MD5)
Previous issue date: 2020
en
dc.description.tableofcontents誌謝 I
摘要 II
Abstract III
目錄 V
圖目錄 VIII
表目錄 XIV
附圖目錄 XV
附表目錄 XVII
第一章 緒論 1
1-1 有機氟化物的簡介 1
1-1-1 氟原子對有機物的影響 1
1-1-2 有機氟化物的分子間作用力 2
1-1-3 有機氟化物分子間作用力的應用 5
1-2 刺激響應材料 7
1-2-1 光響應材料 7
1-3 光響應分子晶體 12
1-3-1 常見分子晶體之光化學反應 13
1-3-2 拓樸化學 15
1-3-3 光致變色 17
1-3-4 光致放光變色 18
1-3-5 光致放光開關 21
1-3-6 光機械效應 23
1-4 含五苯荑基團之固態刺激響應材料 30
1-4-1 五苯荑分子的介紹 30
1-4-2 五苯荑於刺激響應材料的應用 31
1-5 研究動機 37
第二章 結果與討論 38
2-1 目標化合物的合成 38
2-1-1 目標化合物的逆合成分析 38
2-1-2 目標化合物P(F)的合成 39
2-1-3 目標化合物An(F)的合成 40
2-1-4 目標化合物An(F)P(F)的合成 41
2-1-5 化合物碳譜分析 41
2-2 目標化合物的溶液態光物理性質 43
2-2-1 目標化合物於二氯甲烷的吸收光譜 43
2-2-2 目標化合物於二氯甲烷的激發光譜與放光光譜 43
2-3 目標化合物的固態光物理性質 45
2-3-1 目標化合物的同質多晶形性檢測 45
2-3-2 G型目標化合物的固態光物理性質 46
2-3-3 B型目標化合物的固態光物理性質 47
2-4 目標化合物的光致機械力放光變色 49
2-4-1 目標化合物的PMFC性質測試 49
2-4-2 G型目標化合物的PMFC性質之探討 49
2-4-3 B型目標化合物的PMFC性質之探討 64
2-5 目標化合物P(F)的熱致回復性 68
2-6 目標化合物P(F)的G型晶體應用 70
第三章 結論 71
第四章 實驗部分 72
4-1 實驗藥品與溶劑 72
4-2 實驗儀器 75
4-2-1 核磁共振光譜儀 (Nuclear Magnetic Resonance) 75
4-2-2 高解析度質譜儀 (High Resolution Mass) 75
4-2-3 熔點測定儀 (Melting Point Apparatus) 75
4-2-4 紅外線吸收光譜儀 (FT-Infrared Spectrometer) 76
4-2-5 紫外光/可見光吸收光譜儀 (Ultraviolet/Visible Spectrophotometer) 76
4-2-6 螢光光譜儀 (Fluorescence Spectrometer) 76
4-2-7 X-光粉末繞射儀 (X-ray Powder Diffractometer) 78
4-2-8 X-光單晶繞射儀 (X-ray Single Crystal Diffractometer) 78
4-3 實驗方法 79
4-3-1 目標化合物粉末及晶體的製備 79
4-3-2 目標化合物晶體的光致機械力放光變色 80
4-3-3 二聚體定量分析 80
4-3-4 化合物P(F)晶體的光機械效應 81
4-3-5 化合物的合成 81
參考資料 92
附錄 97
dc.language.isozh-TW
dc.subject氟取代基效應zh_TW
dc.subject光致機械力放光變色zh_TW
dc.subject蒽-五苯荑衍生物zh_TW
dc.subjectFluoro-Substituent Effectsen
dc.subjectPhotomechanofluorochromismen
dc.subjectAnthracene-Pentiptycene Derivativesen
dc.title氟取代基效應對蒽-五苯荑衍生物之晶體結構及光致機械力放光變色之探討zh_TW
dc.titleFluoro-Substituent Effects on the Crystal Structure and the Photomechanofluorochromism of Anthracene-Pentiptycene Derivativesen
dc.typeThesis
dc.date.schoolyear108-2
dc.description.degree碩士
dc.contributor.oralexamcommittee孫世勝(Shih-Sheng Sun),詹益慈(Yi-Tsu Chan),陳志欣(Chih-Hsin Chen)
dc.subject.keyword光致機械力放光變色,蒽-五苯荑衍生物,氟取代基效應,zh_TW
dc.subject.keywordPhotomechanofluorochromism,Anthracene-Pentiptycene Derivatives,Fluoro-Substituent Effects,en
dc.relation.page178
dc.identifier.doi10.6342/NTU202003527
dc.rights.note有償授權
dc.date.accepted2020-08-26
dc.contributor.author-college理學院zh_TW
dc.contributor.author-dept化學研究所zh_TW
顯示於系所單位:化學系

文件中的檔案:
檔案 大小格式 
U0001-1508202016541100.pdf
  未授權公開取用
14.48 MBAdobe PDF
顯示文件簡單紀錄


系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。

社群連結
聯絡資訊
10617臺北市大安區羅斯福路四段1號
No.1 Sec.4, Roosevelt Rd., Taipei, Taiwan, R.O.C. 106
Tel: (02)33662353
Email: ntuetds@ntu.edu.tw
意見箱
相關連結
館藏目錄
國內圖書館整合查詢 MetaCat
臺大學術典藏 NTU Scholars
臺大圖書館數位典藏館
本站聲明
© NTU Library All Rights Reserved