講座題目：科學(xué)研究中的偶緣 A Taste of Serendipity

報(bào) 告 人：陸天堯

時(shí) 　 間：2019年10月25日(周五)10:00-11:30

地 　 點(diǎn)：中關(guān)村校區(qū)研究生教學(xué)樓104室

主辦單位：研究生院,、材料學(xué)院

報(bào)名方式：登錄北京理工大學(xué)微信企業(yè)號(hào)---第二課堂---課程報(bào)名中選擇“【百家大講堂】第253期：科學(xué)研究中的偶緣”

【主講人簡(jiǎn)介】

  陸天堯,，博士,，臺(tái)灣大學(xué)杰出講席教授,。1967年從臺(tái)灣大學(xué)獲得學(xué)士學(xué)位,，1974年于美國(guó)芝加哥大學(xué)獲得博士學(xué)位,，之后于美國(guó)明尼蘇達(dá)大學(xué)從事博士后研究工作,，1976年起任職香港中文大學(xué),，開始獨(dú)立建組開展科研工作,；1988年回到母校,，任職于臺(tái)灣大學(xué)化學(xué)系；2006年起成為臺(tái)灣大學(xué)講席教授,。同時(shí),，陸先生還擔(dān)任臺(tái)灣中央研究院化學(xué)研究所特聘研究員兼所長(zhǎng)。陸先生擔(dān)任臺(tái)灣中央研究院化學(xué)研究所長(zhǎng)期間,，多次成功舉辦臺(tái)灣中研院和中科院化學(xué)所等雙邊學(xué)術(shù)研討會(huì),，為促進(jìn)海峽兩岸科學(xué)家的學(xué)術(shù)交流做出了積極的貢獻(xiàn),。陸先生于2016年正式從臺(tái)灣大學(xué)退休，并被聘為杰出講席講授和榮休教授,，繼續(xù)從事科學(xué)研究,。陸先生的研究興趣廣泛，包括有機(jī)合成方法學(xué),，新穎高分子設(shè)計(jì)及合成,，高分子材料化學(xué)，有機(jī)光電材料等方面,，并取得了一系列創(chuàng)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(guó)際期刊上發(fā)表學(xué)術(shù)論文290多篇，專著1部,。同時(shí),，擔(dān)任Chem. Eur J.，Chem. Commun.等多個(gè)國(guó)際期刊的編委,。由于卓著的學(xué)術(shù)成就,，陸先生獲得諸多獎(jiǎng)項(xiàng),，包括：臺(tái)灣中國(guó)化學(xué)會(huì)學(xué)術(shù)獎(jiǎng),，臺(tái)灣國(guó)科會(huì)杰出研究獎(jiǎng)，教育部學(xué)術(shù)獎(jiǎng),，行政院杰出科學(xué)技術(shù)人才獎(jiǎng),，侯金堆杰出榮譽(yù)獎(jiǎng)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(yù)期但幸運(yùn)地找到有價(jià)值且可喜的事物”,，我將“serendipity”一字譯成“偶緣”,，因?yàn)橛信既坏某煞荩錾狭艘彩且环N機(jī)緣,。事實(shí)上,，我個(gè)人就是因?yàn)椤芭季墶辈胚M(jìn)入化學(xué)的殿堂。在我們的研究工作中,，許多時(shí)候也是因“偶緣”而得以有所進(jìn)展,，茲聊舉一些例子，驗(yàn)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(shí)驗(yàn)室發(fā)現(xiàn)了一系列反應(yīng)，直接把硫縮醛中的碳硫鍵,，轉(zhuǎn)換成碳碳鍵,。這些包括脫硫二聚反應(yīng),，偶合烯化反應(yīng)，烯丙基硫縮醛的偕二甲基化反應(yīng),，以及炔丙基硫縮醛的成環(huán)反應(yīng),，形成呋喃或吡咯環(huán)。這些反應(yīng)可用于制備含取代基之poly(phenylene-vinylene),，含硅烷取代基的烯類或雙烯類的衍生物,，由之可得到以硅烷基為橋聯(lián)的高分子，由于硅烷基是正四面體的絕緣體,，每個(gè)發(fā)色團(tuán)都是獨(dú)立的,，其相互作用所呈現(xiàn)的光物理性質(zhì)，或許可以讓我們對(duì)高分子的折疊,，提供一定的訊息,。關(guān)于含呋喃或或吡咯環(huán)的芳香性寡聚物, 我們也會(huì)討論這些化合物的獨(dú)特的光物理性質(zhì)。聚[2(6)-胺基薁]的結(jié)構(gòu)的不同于聚苯胺,，因此其性質(zhì)亦相異,。我們針對(duì)以上合成的共軛系統(tǒng)，扼要及系統(tǒng)性的回顧其光物理性質(zhì)（吸收光譜,，熒光,，能量或電子轉(zhuǎn)移，二階非線性光學(xué)等）及應(yīng)用的可行性（如電致發(fā)光及燃料電池）,。

The word “serendipity”, based on Merriam-Webster Dictionary, is defined as “l(fā)uck 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.