李希友
超分子光化学、聚集体化学。
个性化签名
- 姓名:李希友
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
无机化学
- 研究兴趣:超分子光化学、聚集体化学。
李希友,男,1964年10月生,教授,博导。1981年-1985年于聊城师范学院化学系学习,并获理学学士学位;1985年-1988年在国家机械委204研究所含能材料专业学习并获工学硕士学位;1988年-1995年在山东师范大学化学系任教,分别任助教和讲师。于1995年进入中国科学院感光化学研究所,师从许慧君教授攻读博士学位。1998年获理学博士学位。1998年-2000年在香港中文大学化学系从事博士后研究。2000年-2001年在英国伦敦帝国理工学院化学系从事博士后研究,2001年-2002年获德国宏堡基金会的资助,在波恩大学有机及生物研究所师从著名超分子化学家Fritz V?gtle 教授进行合作研究一年。2002 年受美国西北大学化学系M. Wasielewski教授的邀请,作为助研加入他的研究组。2004年作为特殊人才受聘于山东大学化学于化工学院。
研究领域:超分子光化学、聚集体化学。主要成果:1. 合成了首个不对称取代的单冠醚取代酞菁,用该化合物制备的气敏元件,具有十分优异的性质。2. 在酞菁合卟林的二元化合物中首次发现了能量传递和电子转移的竞争反应,并可以通过调节外部环境调节两种反应的速率,从而控制体系中以一种反应为主。3. 合成了第一种水溶性的树枝状酞菁化合物,这是第一种在水溶液中没有表面活性剂的存在下以单体存在的酞菁化合物。为光动力治疗药物的设计提供了一个新的思路。4. 首次发现了两个聚集体之间的超快速的能量传递过程.为人工光合作用天线分子的设计提供了一个新途径。5. 首次发现冠醚取代的三明治酞菁化合物具有优异的半导体性质,并将他应用于有机场效应晶体管中得到具有很好性能的场效应晶体管。首次将金属配合物引入到OFET材料的研究中。
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1396
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成果阅读
227
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成果数
6
李希友, Louise E. Sinks, † Boris Rybtchinski, † Masanori Iimura, † Brooks A. Jones, † Andrew J. Goshe, ‡ Xiaobing Zuo, ‡ David M. Tiede, ‡ Xiyou Li, *, † and Michael R. Wasielewski*, †
Chem. Mater. 2005, 17, 6295-6303,-0001,():
-1年11月30日
A perylene-3, 4∶9, 10-bis(dicarboximide)-based electron donor-acceptor monomer was designed to selfassemble using the synergistic effects of ð-ð stacking, microsegregation, and hydrogen bonding. The resulting aggregates were characterized in solution by small-angle X-ray scattering (SAXS), while the solid-state structure was probed by X-ray diffraction, transmission electron microscopy, and scanning electron microscopy. The solution-phase assemblies were found to consist of 12 monomers arranged in either a face-to-face stacked pair of hydrogen-bonded hexagonal arrays or a two-turn helix. The SAXS data do not allow a clear distinction between these two cyclic motifs. These cyclic arrays grow to lengths of about 1m and form bundles of cylindrical structures in the solid phase. Aggregation is solvent dependent, with methylcyclohexane inducing aggregation and tetrahydrofuran disrupting it. The solutionphase photophysics of the dodecamer were probed by UV-vis, time-resolved fluorescence, and femtosecond transient absorption spectroscopies, revealing that formation of the dodecamer introduces an ultrafast electron-transfer pathway that is not present in the monomer.
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李希友, Yanli Chen a, b, Shuying Zhao a, Xiyou Li b, *, Jianzhuang Jiang b
Journal of Colloid and Interface Science 289(2005)200-205,-0001,():
-1年11月30日
Amphiphilic phthalocyanines with one crown ether and three alkyl chain substitutions can form stable monolayers on a water surface. This monolayer can be transferred to a substrate by a vertical dipping method. The arrangement of phthalocyanine molecules in LB films was affected by the length of alkyl chains and the coordination of alkali ions in crown ether. Davydov splitting was observed in the absorption spectra of the LB films of phthalocyanine with the shortest alkyl chain substitutions, and this splitting was affected by the alkali ions in the subphase.
Phthalocyanine, Langmuir-Blodgett, Crown ether, Davydov splitting, Polarized UV-vis
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李希友, Xiyou Li, Louise E. Sinks, Boris Rybtchinski, and Michael R. Wasielewski*
J. AM. CHEM. SOC. 2004, 126, 10810-10811,-0001,():
-1年11月30日
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李希友, Xiyou Li, Nicholas J. Long, * John N. Clifford, Colin J. Campbell and James R. Durrant
New J. Chem., 2002, 26, 1076-1080,-0001,():
-1年11月30日
A series of novel tetra-substituted naphthalocyanines featuring hydroxy and carboxylate substituents in peripheral positions have been synthesised in reasonable yields and characterised by spectroscopic techniques. The photochemical properties of the tetra-acid derivative 7 were examined following immobilisation on a nanocrystalline TiO2 surface and photoinduced dye cations were observed following optical excitation. 7 has a redox potential of 0.25 V (vs. Ag/AgCl), which is lower than is required for an efficient regeneration reaction and, therefore, results in limited photocurrent flow when 7 is used in photoelectrochemical solar cells.
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【期刊论文】Synthesis and spectroscopic properties of the first phthalocyanine-nucleobase conjugates
李希友, Xi-you Li and Dennis K. P. Ng*
Tetrahedron Letters 42(2001)305-309,-0001,():
-1年11月30日
The adenine-containing zinc(II) phthalocyanines 3, 4a, and 4b have been prepared by standard O-alkylation of the tetrahydroxy analogue 1. These macrocycles exhibit rather strong intermolecular interactions resulting in a poor solubility in organic solvents and unusual spectral properties that are highly solvent-dependent. Self-assembly of the tetra-adenine phthalocyanine 3 and the thymine-containing 9, 10-anthraquinone 6 through the Watson-Crick base-pairing interactions has also been demonstrated by fluorescence quenching experiments.
phthalocyanines, nucleobases, self-assembly, electronic spectra.,
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【期刊论文】Novel crown ether substituted phthalocyanine with good gas sensing properties to NO2
李希友, Xiyou Li, *a† Yanli Chen b and Huijun Xu c
J. Mater. Chem., 1999, 9, 1415-1418,-0001,():
-1年11月30日
A novel 18-crown-6 substituted phthalocyanine was synthesized. LB films of this material were prepared by a vertical dipping method and the structures of the films were characterized by absorption spectra, polarized absorption spectra and X-ray diffraction experiments. The results indicate that the films possess highly ordered structures. The LB films display good gas sensing properties to NO2 with a high sensitivity, quick response and good reversibility at room temperature.
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