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學術報告第169場 Dr. Guanglu Wu、張興宏教授 and 崔樹勛教授的學術報告
發表于: 2019-12-31 19:43  點擊:

報告1:

Fluorophore Coupling Constrained by Multiple  Cucurbit[8]uril Clampings: from Discrete Dimers to Efficient Energy Transfer

報告人:Dr. Guanglu Wu

 

報告時間:202013日上午9:30 (星期五)

 

 

報告2:

催化一碳單體可控聚合

報告人:張興宏 教授

浙江大學高分子科學與工程學系

報告時間:2020年1月3日下午14:00 (星期五)

報告3:高分子單鏈力譜的新探索

報告人:崔樹勛 教授

西南交通大學

報告時間:2020年1月3日下午15:00 (星期五)

 

報告地點:無機超分子樓一樓圓形報告廳

邀請人:孫俊奇教授

 

 

報告簡介:

 

報告1:Fluorophore Coupling Constrained by Multiple  Cucurbit[8]uril Clampings: from Discrete Dimers to Efficient Energy Transfer

Abstract:

Coupling two fluorophores within a sufficiently short distance for an extended period of time is crucial for both theoretical and experimental investigation of intermolecular processes. However, stacking together precisely two fluorophores in an aqueous solution remains a substantial challenge as most aromatic hydrocarbons show a tendency to aggregate unpredictably (forming clusters of arbitrary numbers of molecules). In 2017, diarylviologen derivatives with a direct connection of two arylpyridinium motifs were demonstrated to fabricate 2:2 complexes with cucurbit[8]uril (CB[8]) macrocycles, suggesting an effective way to confine two components to close proximity. Herein, by further using arylpyridinium as a clamping module, a new class of fluorescent molecules are developed, which generates discrete, dimeric stacked fluorophores upon complexation with multiple CB[8] macrocycles. The multiple constraints result in a "static" complex (remaining as a single entity for more than 30 ms) and facilitate fluorophore coupling in the ground state, showing a significant bathochromic shift in absorption and emission. This modular design is surprisingly applicable and flexible and has been validated through an investigation of nine different fluorophore cores ranging in size, shape, and geometric variation of their clamping modules. The resultant fluorescent dimers can be photo-excited to atypical excimer-like states with elongated excited lifetimes (up to 37 ns) and substantially high quantum yields (up to 1). This strategy offers a straightforward preparation of discrete fluorophore dimers, providing promising model systems with explicitly stable dimeric structures and tunable photophysical features, which can be utilized to facilitate various intermolecular processes.

 

Biography: 

Dr Guanglu Wu received his B.Sc. degree in Chemistry and completed his PhD degree under the supervision of Prof Xi Zhang at Tsinghua University, focusing on investigating the controlled self-assembly of bola-amphiphiles and its counterion effect. In December 2014, he joined Prof Oren Scherman’s group at the University of Cambridge as a postdoctoral research associate working on exploiting the dynamic aspect of supramolecular systems. His recent research revealed a neglected binding mode of CB[8]-mediated complexes, which offers a convenient way to fabricate discrete fluorophore dimers.

 

報告2:催化一碳單體可控聚合 

摘要

采用石化資源利用過程中產生的大量一碳化合物[C1:二氧化碳(CO2)、氧硫化碳(COS)和二硫化碳(CS2)]合成高分子,可以實現C1化合物的高效高值化利用。CO2與環氧共聚的體系已經進入了工業化,但催化效率和選擇性仍有大的提升空間;含硫聚合物品種少,而需求量很大,但利用來源豐富的含硫C1 (源自硫磺)與環氧共聚的研究依然很少。關鍵問題在于發展高效高選擇性的聚合催化劑。本小組通過長期努力,發現和提出了氧-硫交換反應機制,破解了含硫C1與環氧化物共聚的難題,創建了催化COS聚合體系,獲得了系列聚硫代碳酸酯和聚硫醚;開拓了擬碳酸酐鋅酶制備CO2共聚催化劑的途徑,獲得了催化CO2共聚的高效高選擇性的納米雙金屬催化劑。所開發的C1基聚合物在結構材料、功能光學和電學材料有潛在的廣泛用途。

 

報告人簡介:

 

張興宏,教授,浙江大學高分子系。研究興趣是高分子合成化學,獨立從事一碳基聚合物的合成研究。主持國家自然科學基金項目5,浙江省杰出青年基金項目1。JACS、Nat. Comm., Angew. Chem. Int. Ed., Prog. Polym. Sci., Acc. Chem. Res.Macromolecules期刊發表論文90(受邀7);受邀撰寫專著5章和主編專著1(Wiley出版社);授權中國發明專利20美國專利2 ;獲馮新德最佳論文提名獎(2012);入選浙江省151人才工程二層次(2018);入選英國皇家化學會Polymer Chemistry Emerging Investigator (2020);《功能高分子學報》青年編委。

 

報告3:

報告人簡介

崔樹勛,男,1977年生,博士,西南交通大學教授。1995-2004攻讀于吉林大學化學學院,先后獲學士和博士學位,師從張希院士。曾在德國慕尼黑大學和加州大學伯克利分校從事合作研究。2008年獲中國化學會“青年化學獎”,2012年獲國家自然科學基金委優秀青年科學基金資助,2019年享受國務院特殊津貼。已在J. Am. Chem. Soc.、Angew. Chem.、MacromoleculesSCI期刊發表論文60余篇。研究興趣為高分子單鏈力學、水與高分子的相互作用等。

 

 

 

 

 

 

 

 

 

 

版權所有:吉林大學化學學院  ? 2019 郵箱:chembg@jlu.edu.cn
地址:吉林省長春市前進大街2699號 郵編:130012


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