李延团
主要从事生物无机化学和无机药物化学方面的研究工作。
个性化签名
- 姓名:李延团
- 目前身份:
- 担任导师情况:
- 学位:
-
学术头衔:
博士生导师
- 职称:-
-
学科领域:
无机化学
- 研究兴趣:主要从事生物无机化学和无机药物化学方面的研究工作。
李延团, 男,1961年5月生,山东乳山人,博士、教授、博士生导师。现任中国海洋大学医药学院副院长。主要从事生物无机化学和无机药物化学方面的研究工作。近四年来主持和合作承担了国家863、十五重大专项、国家和山东省自然科学基金、山东省科技攻关计划等10余项课题。围绕所承担项目,已在国内外学术刊物上共发表论文195篇。其中有118篇论文被SCI收录。获国家教育部和山东省科技进步二、三等奖8项、省高校优秀成果一等奖和省教育厅科技进步二等奖6项;获全国五一劳动奖章、山东省高校十大优秀教师、济宁市劳动模范等荣誉称号;并被选拔为济宁市专业技术拔尖人才,被美国科学进展协会、美国纽约科学院邀请为会员。获奖:(1)1999年山东省科技进步二等奖。(2)1998年山东省科技进步三等奖。(3)2002年山东省科技进步三等奖。(4)1999年国 家教育部科技进步三等奖。(5)2001年山东省科技进步三等奖。(6)1997年山东省科技进步三等奖。(7)1996年山东省科技进步三等奖。(8)2001年山东省科技进步三等奖。(9)2001年山东省高等学校优秀科研成果一等奖。(10)1999年山东省教委科技进步一等奖。(11)1997年山东省教委科技进步一等奖。(12)1998年山东省教育厅科技进步一等奖。
-
主页访问
1299
-
关注数
0
-
成果阅读
151
-
成果数
4
李延团, Yan-Tuan Li a, *, Cui-Wei Yan b, Hua-Shi Guan a
Polyhedron 22(2003)3223-3230,-0001,():
-1年11月30日
The strategy of "complex as ligand" allowed us to synthesize three new l-oxalato-bridged heterotrinuclear complexes identified as [Cu2Cr(ox)3(Mephen)2]ClO4 (1), [Cu2Fe(ox)3(Mephen)2]ClO4 (2) and [Cu2Fe(ox)3(Me2bpy)2]ClO4 (3), where ox represents the oxalato dianions; Mephen and Me2bpy stand for 5-methyl-1,10-phenanthroline and 4,40-dimethyl-2,20-bipyridine, respectively. The three heterotrinuclear complexes have not yet been isolated in crystalline form suitable for X-ray structure analysis, but based on elemental analyses, molar conductivity and magnetic moment (at room temperature) measurements, IR, ESR and electronic spectra studies, it is proposed that these complexes have an oxalato-bridged structure consisting of two copper(Ⅱ) ions and a chromium(Ⅲ) or an iron (Ⅲ)ion, in which the chromium(Ⅲ) or iron(Ⅲ) ion has an octahedral environment, and the two copper(Ⅱ) ions have a square-planar environment. Variable-temperature magnetic susceptibility (4.2-300K) measurements of the complexes 1 and 2 revealed the occurrence of an intramolecular ferromagnetic interaction between the copper(Ⅱ) and chromium(Ⅲ) ions for 1. On the other hand, the spin-coupling between the copper(Ⅱ) and iron(Ⅲ) ions through the oxalato-bridge in complex 2 is an antiferromagnetic. The magnetic data have been also used to deduce the indicated heterotrinuclear structure. On the basis of the spin-Hamiltonian, H=-2J(SCu1•SM+SCu2•SM) (M=Cr3+ or Fe3+), the magnetic analysis was carried out for the two complexes and the spin-coupling (J) was evaluated as +14.9cm-1 for 1 and )12.7cm-1 for 2.
l-Oxalato-bridge, Copper(, Ⅱ), , Chromium(, Ⅲ), , Iron(, Ⅲ), , Heterotrinuclear complexes, Magnetism
-
56浏览
-
0点赞
-
0收藏
-
0分享
-
82下载
-
0评论
-
引用
李延团, Yan-Tuan Li, *, †, Cui-Wei Yan, ‡ and Jie Zhang§
Crystal Growth & Design, Vol. 3, No.4, 2003,-0001,():
-1年11月30日
Twelve new copper(Ⅱ)-lanthanide(Ⅲ) heterobinuclear complexes bridged by N,N¢-oxamidobis(3,5-dibromobenzoato)cuprate(1) [Cu(Br4obbz)]2- and end-capped with 4,4’-dimethyl-2,2’-bipyridine (Me2bpy), namely, Cu(Br4obbz)Ln(Me2bpy)2NO3 (Ln) Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb), have been synthesized and characterized by elemental analyses, molar conductivity measurements, and spectroscopic (IR, UV, ESR) studies. The temperature dependence of the magnetic susceptibility of the Cu(Br4obbz)Gd(Me2bpy)2NO3 complex was further measured over the range 4.2-300 K. The least-squares fit of the experimental susceptibilities based on the spin Hamiltonian operator, H=-2JS1•S2, yielded J=+2.75cm-1. This result indicates the presence of a weak ferromagnetic spin-exchange interaction between Gd(Ⅲ) and Cu(Ⅱ) ions. A plausible mechanism for the ferromagnetic coupling between Gd(Ⅲ) and Cu(Ⅱ) is discussed in terms of spin polarization.
-
30浏览
-
0点赞
-
0收藏
-
0分享
-
71下载
-
0评论
-
引用
李延团, Yan-Tuan Li a, *, Cui-Wei Yan b, Hua-Shi Guan a
Synthetic Metals 144(2004)69-73,-0001,():
-1年11月30日
Two new μ-oxamido-bridged heterobinuclear complexes have been synthesized and identified as [Cu(dmoxpn)Mn(Me2phen)2](ClO4)2 (1) and [Cu(dmoxae)Mn(Me2phen)2](ClO4)2 (2), where Me2phen denotes 2,9-dimethyl-1,10-phenanthroline; dmoxpn and dmoxae represent N,N -bis[3-(dimethylamino)-propyl]oxamido and N,N’-bis[2-(dimethylamino)ethyl]oxamido dianions, respectively. Based on elemental analyses, conductivity measurements, IR and electronic spectra studies, it is proposed that the two complexes have oxamido-bridged structures consisting of a copper(Ⅱ) and a manganese(Ⅱ) ions, which have a square-planar environment and a distorted octahedral environment, respectively. The electronic reflectance spectra indicate the presence of exchange-coupling interaction between bridging copper(Ⅱ) and manganese(Ⅱ) ions. Variable-temperature magnetic susceptibility (4.2-300 K) measurements of (1) and (2) complexes revealed the occurrence of an intramolecular antiferromagnetic interaction between the adjacent manganese(Ⅱ) and copper(Ⅱ) ions through the oxamido bridge within each molecule. On the basis of spin Hamiltonian, H=-2JS1S2 the magnetic analysis was carried out for the two complexes and the spin coupling constant (J) was evaluated as -26.9cm-1 for (1) and -38.2cm-1 for (2). The influence of the chelate ring arrangement around the copper(Ⅱ) in the copper(Ⅱ)-manganese(Ⅱ) heterobinuclear complexes on magnetic interactions between the metal ions of this kind of complexes is also discussed.
μ-Oxamido bridge, Copper(, Ⅱ), -manganese(, Ⅱ), , Heterobinuclear complexes, Magnetism
-
26浏览
-
0点赞
-
0收藏
-
0分享
-
207下载
-
0评论
-
引用
李延团, Yan-Tuan Li a, *, Cui-Wei Yan b, Jian-Fang Lou a, Hua-Shi Guan a
Journal of Magnetism and Magnetic Materials 281(2004)68-76,-0001,():
-1年11月30日
Two new m-oxalato-bridged CuⅡ2MⅢ-type (M=Cr and Fe) heterotrinuclear complexes have been prepared and identified as [Cu2Cr(ox)3(tmen)2]ClO4 (1) and [Cu2Fe(ox)3(tmen)2]ClO4 (2), where oxrepresents the oxalato dianions; tmen stands for N,N,N0,N0-tetramethylethylenediamine. The two complexes have not yet been isolated in crystalline form suitable for X-ray structure analysis, but based on elemental analyses, molar conductivity and magnetic moment (at room-temperature) measurements, IR, ESR and electronic spectra studies, it is proposed that these complexes have oxalato-bridged structure consisting of two copper(Ⅱ) ions and a chromium(Ⅲ) or an iron(Ⅲ) ion, in which the chromium(Ⅲ) or iron(Ⅲ) ion has an octahedral environment, and the two copper(Ⅱ) ions have a square-planar environment. The two heterotrinuclear complexes were further characterized by variable temperature magnetic susceptibility (4.2-300K) measurements and the magnetic data have been also used to deduce the indicated heterotrinuclear structure. The results derived from least-squares fit of the experimental data have confirmed that the adjacent copper(Ⅱ) and chromium(Ⅲ) ions through the oxalato-bridge in complex (1) are ferromagnetically coupled with the exchange integral J(Cu-Cr)=+10.2 cm-1, while an intramolecular antiferromagnetic coupling is detected between the copper(Ⅱ) and iron(Ⅲ) ions through the oxalato-bridge in complex (2) with the exchange integral J(Cu-Fe)=-11.6 cm-1, on the basis of the spin Hamiltonian operator, H =2J(SCu•SM+SCu2•SM) (M=Cr3+ or Fe3+).
Oxalato-bridge, Heterotrinuclear complexes, Magnetic interaction, Cu(, Ⅱ), -Cr(, Ⅲ), -Cu(, Ⅱ), , Cu(, Ⅱ), -Fe(, Ⅲ), -Cu(, Ⅱ),
-
39浏览
-
0点赞
-
0收藏
-
0分享
-
274下载
-
0评论
-
引用