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报告摘要:
Interface has been playing a key role in most “bottom-up” synthesis methods and is advantageous for directing the orientation of the molecules or precursors. By looking back at the history, the interfacial synthesis has been largely developed for the controlled polymer synthesis, which can be dated back to 1930s by Gee et al who achieved polymer monolayers at an air-water interface. Typically, the reactions at the interfaces between air-water (or gas-liquid), liquid-liquid, liquid-solid and gas-solid (or vacuum-solid) have been explored to offer paramount control over the morphology and the structure of polymers. While the synthetic linear polymers and cross-linked polymers are the main resultant structures in the historic interfacial polymer synthesis, it turns out only in recent years that a controlled 2D covalent reaction can take place if a finely designed interface is provided. A subsequent consequence of adsorption, nucleation, arrangement and polymerization of suitably designed precursors or intermediates, guided by a confined 2D geometry of interface, can yield a structurally well-defined, periodic organic 2D material such as 2D polymer.
In this lecture, we will present our recent efforts on the bottom-up synthetic approaches towards novel organic 2D materials with structural control at the atomic/molecular-level or at the meso-scale. First, we will introduce the latest development on the synthetic 2D conjugated polymers including 2D Schiff-base type covalent polymers and 2D metal-dithienene/diamine coordination polymers at the air-water or liquid-liquid interfaces. The resulting 2D conjugated polymers exhibit single- to multi-layer feature, good local structural ordering and with a large size. The functional exploration of such 2D conjugated (coordination) polymers for the electrical, magnetic and mechanical properties, as well as serving as efficient electrocatalytic water splitting catalysts will be demonstrated. Next, we will introduce the self-assembly of a host-guest enhanced donor-acceptor interaction, consisting of a tris(methoxynaphthyl)-substituted truxene spacer, and a naphthalene diimide substituted with N-methyl viologenyl moieties as donor and acceptor monomers, respectively, in combination with cucurbit[8]uril as host monomer toward monolayers of 2D supramolecular polymers at liquid-liquid interface. Third, we will present the supramolecular approaches to synergistically control the multi-component assembly, which results into 2D conducting polymers, such as polypyrrole and polyaniline nanosheets featuring 2D structures and with adjustable mesopores with/without on various functional free-standing surfaces. The unique structure with adjustable pore sizes (5–20 nm) and thickness (35–45 nm), enlarged specific surface area as well as high electrical conductivity make 2D conducting polymers promising for a number of applications. Finally, we will present a controlled synthesis of few-layer 2D polymer crystals on the water surface assisted by soft templates; we achieved micrometer-sized either horizontally or vertically grown 2D polyamide crystals by tailoring templating layers. The future perspective and outlook regarding the goal towards highly crystalline organic 2D materials will be also provided.

报告人简介：
Xinliang Feng is a full professor at Technical University of Dresden. He received his Bachelor’s degree in analytic chemistry in 2001 and Master’s degree in organic chemistry in 2004. Then he joined Prof. Klaus Müllen's group at the Max Planck Institute for Polymer Research for PhD thesis, where he obtained his PhD degree in April 2008. Since December 2007, he was appointed as a group leader at the Max-Planck Institute for Polymer Research, and since 2012, he became a distinguished group leader at the Max-Planck Institute for Polymer Research. Since 2011, he was appointed as an adjunct distinguished professor at the Shanghai Jiao Tong University and as the director for the Institute of Advanced Organic Materials.
His current scientific interests include organic synthetic methodology, organic synthesis and supramolecular chemistry of π-conjugated system, bottom-up synthesis and top-down fabrication of graphene and graphene nanoribbons, 2D polymers and supramolecular polymers, 2D carbon-rich conjugated polymers for opto-electronic applications, energy storage and conversion, new energy devices and technologies. He has published more than more than 42,000 citations with H-index of 99.
He has been awarded several prestigious prizes such as IUPAC Prize for Young Chemists (2009), Finalist of 3rd European Young Chemist Award, European Research Council (ERC) Starting Grant Award (2012), Journal of Materials Chemistry Lectureship Award (2013), ChemComm Emerging Investigator Lectureship (2014), Fellow of the Royal Society of Chemistry (FRSC, 2014), Highly Cited Researcher (Thomson Reuters, 2014-2017), Small Young Innovator Award (2017), Hamburg Science Award (2017), EU-40 Materials Prize (2018). He is an Advisory Board Member for Advanced Materials, Journal of Materials Chemistry A, ChemNanoMat, Energy Storage Materials, Small Methods and Chemistry -An Asian Journal. He is the Head of ESF Young Research Group "Graphene Center Dresden", and Working Package Leader of WP Functional Foams & Coatings for European Commission’s pilot project “Graphene Flagship”.