报告题目：Hydrazone-Based Switches and Functional Materials
报告时间：2023年7月27日 15:00
报告地点：五教216室
报告人：Ivan Aprahamian 教授
主办单位：化学与分子工程学院
报告人简介：Professor Aprahamian received all his degrees (BSc in 1998, MS in 2000, and PhD in 2005) from the Hebrew University of Jerusalem, Israel. His doctoral research focused on NMR spectroscopic studies of alkali metal reduced polycyclic aromatic hydrocarbons. He then carried out postdoctoral researcher in Professor Sir Fraser Stoddart's group at UCLA, where he focused on the synthesis of switchable and highly-ordered interlocked molecules in the form of bistable [n]rotaxanes. Dr. Aprahamian joined the faculty at Dartmouth College in August 2008, and was promoted to Associate Professor in 2014, and Full Professor in 2019. In 2022 he became the Chair of the department. His research group focuses on using structurally simple, modular, and tunable hydrazone-based building blocks in the development of adaptive functional materials, including switches, sensors and fluorophores. Dr. Aprahamian is the recipient of a number of honors including the 2016 Cram Pederson Lehn Award in Supramolecular Chemistry, and is a Humboldt and Royal Society of Chemistry Fellow.
摘要：For the past few years we have been developing structurally simple, easy to make, modular, and tunable hydrazone-based functional materials.1 This presentation will deal with our recent advances with these systems, with an emphasis on newly developed photochromic compounds2 that exhibit many interesting properties, including emission ON/OFF toggling in solution (see below) and the solid-state.3 The integration of these photochromic compounds into liquid crystals4 and liquid crystalline elastomers,5 and their use in the kinetic trapping of different Tg values in the same polymer,6 the templated-synthesis of γ-cyclodextrin,7 and use as an energy storage system,8 among others, will be discussed.
Representative references:
1. B. Shao, I. Aprahamian Chem 2020, 6, 2161–2173.
2. H. Qian, S. Pramanik, I. Aprahamian J. Am. Chem. Soc. 2017, 139, 9140−9143
3. B. Shao, M. Baroncini, H. Qian, L. Bussotti, M. Di Donato, A. Credi, I. AprahamianJ. Am. Chem. Soc. 2018, 140, 12323–12327
4. M. J. Moran, M. Magrini, D. Walba, I. AprahamianJ. Am. Chem. Soc. 2018, 140, 13623–13627
5. A. Ryabchun, Q. Li, F. Lancia, I. Aprahamian, N. Katsonis J. Am. Chem. Soc. 2019, 141, 1196–1200
6. S. Yang, J. D. Harris, A. Lambai, L. L. Jeliazkov, G. Mohanty, H. Zeng, A. Priimagi, I. Aprahamian, J. Am. Chem. Soc.2021, 143, 16348–16353
7. S. Yang, D. Larsen, M. Pellegrini, S. Meier, D. F. Mierke, S. R. Beeren, I. Aprahamian, Chem 2021, 7, 2190–2200.
8. Q. Qiu, S. Yang, M. A. Gerkman, H. Fu, I. Aprahamian, G. G. D. Han, J. Am. Chem. Soc.2022, 144, 12627–12631.