【3rd.Jan.】Covalent and Noncovalent Approaches to Rigid Coplanar π-Conjugated Molecules and Macromolecules
日期：2020-01-03
閱讀：1561
題目：Covalent and Noncovalent Approaches to Rigid Coplanar π-Conjugated Molecules and Macromolecules
報(bào)告人：方磊 Tenured Associate Professor Texas A&M University
時(shí)間：2020年1月3日 周五下午15：30
地點(diǎn)：化學(xué)A樓518會議室
邀請人：顏徐州 研究員
報(bào)告人介紹：
? 方磊，男，博士，教授，博士生導(dǎo)師。1983年生于江西鄱陽。2003年本科畢業(yè)于武漢大學(xué)化學(xué)基地班，2006年獲武漢大學(xué)碩士學(xué)位，導(dǎo)師何永炳教授。2010年獲美國西北大學(xué)化學(xué)博士學(xué)位，師從2016年諾貝爾獎(jiǎng)得主Fraser Stoddart教授。2011～2013年在斯坦福大學(xué)化工系鮑哲南教授課題組從事博士后研究工作。2013年8月加盟得克薩斯A&M大學(xué)(TAMU)化學(xué)系，現(xiàn)為副教授，享受終身教職 (英文職稱為Tenured Associate Professor)。其獨(dú)立課題組6年內(nèi)吸引并直接支配了近300萬美元的科研經(jīng)費(fèi)。在Nature Chemistry, Chem, JACS, Angew Chem, Chemical Science，EES等國際頂尖期刊發(fā)表論文70多篇，被引用超過4500次。獲批美國專利5項(xiàng)，其中轉(zhuǎn)讓企業(yè)一項(xiàng)。先后獲得中國國家優(yōu)秀自費(fèi)留學(xué)生獎(jiǎng)學(xué)金，美國化學(xué)會石油研究基金新銳學(xué)者，鐘淵化工(Kaneka)青年教授獎(jiǎng)，美國化學(xué)會PMSE青年學(xué)者榮譽(yù), 2017年美國國家自然科學(xué)基金杰出青年基金(NSF CAREER Award)，MDPI Polymers青年學(xué)者獎(jiǎng)，Theime Chemistry Journal獎(jiǎng)，中美華人教授協(xié)會杰出青年教授獎(jiǎng)等榮譽(yù)。擔(dān)任多個(gè)國際頂尖雜志審稿人。并擔(dān)任美國化學(xué)會國家獎(jiǎng)項(xiàng)（ACS National Awards）評審委員，美國國防部研究生獎(jiǎng)學(xué)金評委，美國國家自然科學(xué)基金評委，以及Lawrence Berkeley國家實(shí)驗(yàn)室用戶評審委員。
報(bào)告介紹：
Molecular conformation and rigidity are essential factors in determining the properties of individual molecules, the associated supramolecular assemblies, and bulk materials. Pursuing a rigid and coplanar molecular conformation often represents one of the primary objectives when designing and synthesizing conjugated molecules for electronic and optical applications. Two general bottom-up strategies – covalent annulation and noncovalent conformational control – are often employed to construct rigid coplanar π-systems. In this lecture, I first describe our efforts to synthesize rigid coplanar π-systems fused by various types of bonds, including kinetically formed covalent bonds, thermodynamically formed covalent bonds, N→B coordinate bonds, and hydrogen bonds, in order of increasing dynamic character. The subsequent section discusses the characteristic properties of selected examples of these rigid coplanar π-systems, in comparison with control compounds that are not rigid and coplanar, particularly focusing on the optical, electronic, and electrochemical properties. For systems bridged with noncovalent interactions, active manipulation of the dynamic bonds can tune variable properties at a molecular or collective level. Intermolecular interactions, solid-state packing, and processing of several cases are then discussed to lay the foundation for future materials applications of rigid coplanar π-systems.
References:
(1) Lee, J.; Li, H.-B.; Kalin, A. J.; Wang, C.; Yuan, T.; Olson, T.; Li, H.-Y.; Fang, L.* Extended Ladder-Type Benzo[k]tetraphene-Derived Oligomers. Angew. Chem. Int. Ed., 2017, 56, 13727–13731.
(2) Zou, Y.; Ji, X.; Yuan, T.; Stanton, D. J.; Cai, J.; Lin, Y.-H.; Naraghi, M.; Fang, L.* Synthesis and Solution Processing of a Hydrogen-Bonded Ladder Polymer. Chem, 2017, 2, 139?152.
(3) Zhu, C.; Ji, X.; You, D.; Chen, T. L.; Mu, A. U.; Baker, K. P.; Klivansky, L. M.; Liu, Y.; Fang, L.* Extraordinary Redox Activities in Ladder-Type Conjugated Molecules Enabled by B←N Coordination-Promoted Delocalization and Hyperconjugation. J. Am. Chem. Soc., 2018, 140, 18173–18182.
(4) Zhu, C.; Kalin, A. J.; Fang, L.* Covalent and Noncovalent Approaches to Rigid Coplanar π‐Conjugated Molecules and Macromolecules. Acc. Chem. Res., 2019, 52, 1089–1100.
