报告题目：Diameter-Based Separation and Optical Enrichment of Single-Walled Carbon Nanotubes with Porphyrin/Pyrene Nanotweezers or Nanocalipers 

　　报告人：A. F. M. Mustafizur Rahman, University of Dhaka 

　　报告时间：2015年12月8日（周二）下午16 : 40 

　　报告地点：化物楼三楼会议室 

　　报告人简介： 

　　Rahman博士的主要研究方向为：1. 应用于生物医药的生物纳米复合材料的制备表征；2. 基于主客体络合的碳纳米管合成；3. 抗菌有机金属和有机分子合成；4. 植物原药中生物活性组分提取。目前已发表在Chem. Sci.，Chem. Comm.，J. Am. Chem. Soc.等重要学术刊物上发表多篇高水平研究论文。 

　　报告简介：The authors have been developing host-guest methodology for separation of single-walled carbon nanotubes (SWNTs) with gable-type diporphyrins, designated as nanotweezers. The chiral porphyrin nanotweezers discriminated the handedness and diameter simultaneously, giving optically active SWNTs with limited (n,m) structures. As an extension of our strategy, based on 1- or 2-position of pyrene, dipyrene nanotweezers and nanocalipers have been designed consisting of various rigid spacers in between and synthesized for the first time to extract SWNTs. We have found that dipyrene nanotweezers and nanocalipers could form stable complexes for separating SWNTs according to their diameters. On the basis of photoluminescence (PL), absorption, and Raman spectra of the SWNTs before and after the extraction, the nanotweezers were found to show high selectivity toward SWNTs with narrower diameter and metallic SWNTs were highly enriched by use of bis(tert-butylpyrene) nanocalipers. 

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