講座題目🗞：科學研究中的偶緣 A Taste of Serendipity

報 告 人：陸天堯

時 　 間🎊㊙️：2019年10月25日(周五)10:00-11:30

地 　 點：中關村校區研究生教學樓104室

主辦單位🫨：意昂平台、材料學院

報名方式：登錄意昂官网微信企業號---第二課堂---課程報名中選擇“【百家大講堂】第253期👈：科學研究中的偶緣”

【主講人簡介】

  陸天堯🫱🏼⛹🏼‍♂️，博士，臺灣大學傑出講席教授。1967年從臺灣大學獲得學士學位🙆🏽‍♂️，1974年於美國芝加哥大學獲得博士學位，之後於美國明尼蘇達大學從事博士後研究工作，1976年起任職香港中文大學，開始獨立建組開展科研工作；1988年回到母校，任職於臺灣大學化學系🕵🏿；2006年起成為臺灣大學講席教授。同時，陸先生還擔任臺灣中央研究院化學研究所特聘研究員兼所長🗣。陸先生擔任臺灣中央研究院化學研究所長期間🕠🙆，多次成功舉辦臺灣中意昂平台和中科院化學所等雙邊學術研討會，為促進海峽兩岸科學家的學術交流做出了積極的貢獻。陸先生於2016年正式從臺灣大學退休，並被聘為傑出講席講授和榮休教授🙌🏼，繼續從事科學研究♛。陸先生的研究興趣廣泛，包括有機合成方法學，新穎高分子設計及合成🈲，高分子材料化學，有機光電材料等方面🫔，並取得了一系列創新性研究成果。迄今，已在Angew. Chem. Int. Ed.👩🏽‍🎓，J. Am. Chem. Soc.，Acc. Chem. Res.等重要國際期刊上發表學術論文290多篇，專著1部🧗🏻‍♂️。同時，擔任Chem. Eur J.，Chem. Commun.等多個國際期刊的編委🚵。由於卓著的學術成就，陸先生獲得諸多獎項，包括🪕：臺灣中國化學會學術獎，臺灣國科會傑出研究獎😊，教育部學術獎，行政院傑出科學技術人才獎，侯金堆傑出榮譽獎以及日本JSPS Fellow等🪄🦤。

Professor Tien-Yau Luh obtained his Ph.D. degree from the University of Chicago (with L. M. Stock) in 1974.  After spending two years of postdoctoral research at the University of Minnesota (with P. G. Gassman), he began his independent research at the Chinese University of Hong Kong in 1976.  He moved back in 1988 to his alma mater, National Taiwan University (NTU) where he has been University Chair Professor. He has published over 290 papers and has received numerous awards (e.g. Academic Award, Chemical Society Located in Taipei, 2012, JSPS Fellow, 2010, NTU Distinguished Professor of Chemistry, 2006-2012, Distinguished Research Fellow, Institute of Chemistry, Academia Sinica, 2001-2004, National Chair Award, Ministry of Education, 1999-2002, Ministry of Education Award for the Outstanding Research in Science, 1998, Ho Chin Tui Foundation Science Award, 1998, Outstanding Scholar Award, Foundation for the Advancement of Outstanding Scholarship, 1995-2000, Executive Yuan's Outstanding Award on Science and Technology, 1994).  He is also serving as a member of the advisory/editorial board for ChemComm, Chemistry-A European Journal, The Chemical Record, Bulletin of the Chemical Society of Japan, Tetrahedron, Tetrahedron Letters and Springer Lecture Notes in Chemistry.

【講座信息】

  “Serendipity”一字依韋伯斯特詞典的定義為“非預期但幸運地找到有價值且可喜的事物”👩🏽‍🎨，我將”serendipity”一字譯成“偶緣”🧑🏽‍✈️，因為有偶然的成份，遇上了也是一種機緣。事實上，我個人就是因為“偶緣”才進入化學的殿堂🧑🏽‍🦳。在我們的研究工作中，許多時候也是因“偶緣”而得以有所進展🕐，茲聊舉一些例子，驗證了“偶緣”在我們的研究工作上的角色。

  八零年末到九零年代中，我們的實驗室發現了一系列反應，直接把硫縮醛中的碳硫鍵👩🏻‍🦼，轉換成碳碳鍵。這些包括脫硫二聚反應👁，偶合烯化反應，烯丙基硫縮醛的偕二甲基化反應，以及炔丙基硫縮醛的成環反應♿，形成呋喃或吡咯環。這些反應可用於製備含取代基之poly(phenylene-vinylene)🏌🏻，含矽烷取代基的烯類或雙烯類的衍生物，由之可得到以矽烷基為橋聯的高分子🦛，由於矽烷基是正四面體的絕緣體，每個發色團都是獨立的，其相互作用所呈現的光物理性質🧔‍♂️，或許可以讓我們對高分子的折疊，提供一定的訊息。關於含呋喃或或吡咯環的芳香性寡聚物, 我們也會討論這些化合物的獨特的光物理性質。聚[2(6)-胺基薁]的結構的不同於聚苯胺🤞🏼，因此其性質亦相異。我們針對以上合成的共軛系統👩‍⚖️👳🏻‍♂️，扼要及系統性的回顧其光物理性質（吸收光譜，熒光，能量或電子轉移🫐，二階非線性光學等）及應用的可行性（如電致發光及燃料電池）。

The word “serendipity”, based on Merriam-Webster Dictionary, is defined as “luck that takes the form of finding valuable or pleasant things that are not looked for”.  I translate this word to Chinese as “偶緣”, because it may not only happen accidentally.  but also offer an opportunity for exploration.  Indeed, because of serendipity, I became a chemist.  Through the past forty some years, we have encountered on several occasions serendipitous discoveries in our research.  One may easily identify that some of our works were actually not because of well-planned projects, but happened to be discovered. From late eighties to mid nineties of last century, we have discovered a series of reactions to directly convert the two C-S bonds in dithioacetals into the corresponding C-C bonds.  These approaches involve desulfurdimerization, olefination, geminaldimethylation of allylic dithioaceals, and annulation of propargylic dithioacetals to give furan and pyrrole rings.  These reactions can be used for the synthesis of substituted poly(phenylene-vinylene)s, silyl-substituted alkenes or dienes.  Starting from bis-silyl hydrides and bis-alkynes,.silylene-spaced divinylarenes copolymers were prepared by rhodium-catalyzed  hydrosilylation.  Since the silylene moiety can be considered as a tetrahedral insulating linker, the chromophore in these polymers might give unique photohysical properties due to intrachain chromophore-chromophore interactionsThese properties may offer interesting clue on the nature of polymer foldings. Furan orpyrrole-containing oligoaryls were also synthesized accordingly. Structurally, poly[2(6)-aminoazulene] and polyaniline are not same.  Accordingly, the photophyaical properties of polyaniline are very different from those of poly[2(6)-aminoazulene].We have examined the photo-physical properties (including absorption, emission, FRET or PET, 2nd order NLO, etc) and potential applications (light emitting diodes or fuel cells) of the conjugated systems mentioned above.  These characteristic properties and their potential will be briefly discussed.