关于举行新加坡国立大学吴继善副教授学术报告会的通知
关于举行新加坡国立大学吴继善副教授
学术报告会的通知
2013-03-07
380
学术报告：Low Band Gap Polycyclic Aromatic Compounds: From Closed-shell Near Infrared Dyes and Semiconductors to Open-shell Biradicals
报告人：吴继善副教授（新加坡国立大学）
时间：2013年3月11日上午10:00
地点：光电楼2楼大教室
个人简介：
摘要：
Low band gap (LBG) polycyclic aromatic compounds exhibiting near infrared (NIR) absorption/emission have important applications as NIR dyes for organic solar cells, bio-imaging and nonlinear optics. In addition, open-shell biradical character could be observed for certain type of LBG compounds which showed unique magnetic, electronic and optical properties. We have developed different approaches to prepare a series of soluble and stable LBG polycyclic aromatic compounds. These include: (1) zig-zag edged polycyclic aromatic hydrocarbons (PAHs) (e.g. periacene), (2) Z-shaped zethrenes and (3) extended p-quinodimethane with a singlet open-shell ground state, and (4) hybrid systems by fusion of a PAH (e.g. perylene and anthracene) with porphyrin or boron dipyrromethene (BODIPY). I will introduce their challenging synthetic chemistry and their interesting physical and material properties. I will also discuss their potential applications for solar cells, field effect transistors and bio-imaging.
See our recent representative publications:
(1) Z. Sun, et al., “2D Closed-shell and open-shell nanographenes”, Top. Curr. Chem. 2013, DOI: 10.1007/128_2012_368.
(2) Z. Sun et al., “Low band gap polycyclic hydrocarbons: from closed-shell near infrared dyes and semiconductors to open-shell radicals”, Chem. Soc. Rev. 2012, 41, 7857.
(3) Y. Li et al., “Kinetically blocked stable heptazethrene and octazethrene: closed-shell or open-shell in the ground state?”, J. Am. Chem. Soc. 2012, 134, 14913.
(4) Z. Zeng et al., “Tetrabenzo- Chichibabin’s hydrocarbons: tunable ground state and unusual conversion between their closed-shell and open-shell resonance forms”, J. Am. Chem. Soc. 2012, 134, 14513 (featured in JACS Spotlights).
(5) Z. Sun et al., “Soluble and stable heptazethrene bis(dicarboximide) with a singlet open-shell ground state”, J. Am. Chem. Soc. 2011, 133, 11896 (selected as ACS Noteworthy Chemistry and highlighted in Synfacts).
J. Wu et al., “Graphene molecules as potential materials for electronics”, Chem. Rev. 2007, 107, 718.
