寇会忠
新型功能配合物的研究,侧重于光电磁分子材料
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- 姓名:寇会忠
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学术头衔:
博士生导师
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学科领域:
勘查地质学
- 研究兴趣:新型功能配合物的研究,侧重于光电磁分子材料
寇会忠教授,男,1968年出生于河北省海兴县。90年7月毕业于南开大学化学系,获理学学士学位。99年7月毕业于南开大学化学系,获理学博士学位。1999年7月-2001年5月在北京大学化学学院从事博士后研究。2001年5月起受聘于清华大学化学系,2002年12月受聘副教授至今。目前从事新型功能配合物的研究,侧重于光电磁分子材料。已发表学术论文SCI论文74篇,其中包括“J. Am. Chem. Soc.”, “Angew. Chem. Int. Ed.”, “Chem. Mater.”, “Chem. Commun.”, “Inorg. Chem.”, “Dalton Trans.”, “Eur. J. Inorg. Chem.”, “Cryst. Growth Des.”等知名刊物。第一作者论文被SCI他引三百多次。主持国家自然科学基金资助课题两项,主持教育部霍英东高等学校青年教师基金项目一项。2002获中国化学会青年化学奖。
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寇会忠, Yun-Bo Jiang, † Hui-Zhong Kou, *, † Ru-Ji Wang, † Ai-Li Cui, † and Joan Ribas‡
Inorganic Chemistry, Vol. 44, No.3, 2005,-0001,():
-1年11月30日
Two new polynuclear complexes [Ni6(amox)6(Ì6-O)(Ì3-OH)2]Cl2‚6H2O and [Cu3(amox)3 (Ì3-OH) (Ì3-Cl)]ClO4 4H2O (amox-) anion of 4-amino-4-methyl-2-pentanone oxime) have been synthesized and characterized structurally and magnetically. The Ni (II) complex contains a novel Chinese-lantern-like Ni6 cage centered by an oxo ion. It contains the nearest octahedral Ni (II)‚‚‚Ni (II) separation (<2.8 Å) and exhibits strong antiferromagnetic properties. The Cu (II) complex has a cyclic trinuclear copper (II) core bridged by both Ì3-OH-and Ì3-Cl-ions. The magnetic susceptibilities of both antiferromagnetic complexes were fitted by using approximate models.
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寇会忠, Hui-Zhong Kou *, Zhong-Hai Ni, Bei Chuan Zhou, Ru-Ji Wang
Inorganic Chemistry Communications 7(2004)1150-1153,-0001,():
-1年11月30日
A hetero-bimetallic complex K [Mn(acacen)] 2 [W(CN)8]
Crystal structure, Manganese complex, Tungsten complex, Schi base, Cyanide bridging, Magnetic property
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【期刊论文】A 2D Cyano- and Oxamidato-Bridged Heterotrimetallic CrIII-CuII-GdIII Complex**
寇会忠, Hui-Zhong Kou, * Bei Chuan Zhou, Song Gao, and Ru-Ji Wang
Angew. Chem. Int. Ed. 2003, 42, 3288-3291,-0001,():
-1年11月30日
The ability of the oxamidato group to transmit efficiently magnetic coupling has been well documented. [3] The oxamidato-bridged GdIII-CuII complexes have been investigated magnetically since the pioneering research by Gatteschi et al., who first found that the GdIII–CuII exchange is ferromagnetic. [4] Recently, a four-coordinate macrocyclic oxamido-CuII complex has been used as "the complex ligand" tosuccessfully construct polynuclear Cu6Nd2 complexes. [5] It is anticipated that the coordinated CuL group (L=1, 4, 8, 11-tetraazacyclotradecane-2,3-dione) could accept donor atoms
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【期刊论文】Two-Dimensional Coordination Polymers Exhibiting Antiferromagnetic Gd(III)-Cu(II) Coupling
寇会忠, Hui-Zhong Kou, * Yun-Bo Jiang, and Ai-Li Cui
Crystal Growth & Design, Vol. 5, No.1, 2005,-0001,():
-1年11月30日
A series of carboxylate-bridged 4f-3d complexes Cat+ [Cu(nta)Cl]2Ln(H2O)4 (Cat+) Na+ or K+, Ln3+) Gd3+ or La3+, and nta3-) nitrilotriacetate) have been synthesized by self-assembly of CuCl2‚4H2O, H3nta, and LnCl3‚6H2O in the presence of stoichiometric amounts of CatOH. X-ray diffraction analysis revealed that these complexes are isostructural and have a novel layered structure. The Ln3+ ion is coordinated by nine oxygen atoms of four [Cu(nta)Cl]2- and four water molecules, while each [Cu(nta)Cl]2- anion connects two Ln3+ using carboxylate oxygen atoms giving rise to a rhombus-like layered structure. The alkaline metal ions Cat+ are situated between the layers and coordinated to the oxygen atoms of [Cu(nta)Cl]2-generating a quasi-three-dimensional network. Magnetic studies indicate the presence of apparent antiferromagnetic coupling between Cu (II) and Gd (III) in KCu2Gd and NaCu2Gd. The magnetic susceptibilities of KCu2-La were simulated by using a quadratic model, which suggests a weak antiferromagnetic Cu (II) -Cu (II) coupling.
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【期刊论文】Unexpected Assembly of a Unique Cyano-Bridged Three-Dimensional Cu3Cr2 Ferromagnet
寇会忠, Hui-Zhong Kou, † Song Gao, *, † Jing Zhang, † Ge-Hui Wen, ‡ Gang Su, § R. K. Zheng, ‡ and X. X. Zhang‡
J. Am. Chem. Soc. 2001, 123, 11809-11810,-0001,():
-1年11月30日
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寇会忠, Hui-Zhong Kou, *, † Song Gao, ‡ Chun-Hui Li, † Dai-Zheng Liao, § Bei-Chuan Zhou, † Ru-Ji Wang, † and Yadong Li†
Inorganic Chemistry, Vol. 41, No.18, 2002,-0001,():
-1年11月30日
Two cyano-bridged Gd (III) -Cr (III) complexes [Gd(urea)4(H2O)2]2[Cr(CN)6]2 (1) and {[Gd(capro)2(H2O)4Cr(CN)6]‚ H2O}n (2) (capro represents caprolactam) have been synthesized and characterized structurally and magnetically. Complex 1 has a tetranuclear Gd2Cr2 square structure, in which two cis-CN-ligands of each [Cr(CN)6] link two [Gd(urea)4(H2O)2] groups and in turn, two [Gd(urea)4(H2O)2] link two [Cr(CN)6] in a cis fashion. Complex 2 is composed of 1D chains with alternating [Gd(capro)2(H2O)4] and [Cr(CN)6] moieties connected by the trans-CN-ligands of [Cr(CN)6]. The dehydration of 2 at 120℃ generates a new complex, [Gd(capro)2(H2O)2Cr(CN)6] (2¢). Magnetic studies show the existence of antiferromagnetic Gd(III)-Cr (III) interaction in these complexes. On the basis of the tetranuclear model, the magnetic susceptibilities of 1 have been analyzed giving the intermetallic magnetic coupling constant of -0.36cm-1. Complex 2¢ exhibits a ferrimagnetic order below 2.1K. Interestingly, 2¢ is quite soluble in water, and slow evaporation of the solution gives the hydrated complex 2. Therefore, 2¢ is a soluble molecular magnet, and this significant behavior implies potential applications. Isothermal magnetization measurements of 2¢ and other cyano-bridged Gd (III)-Cr (III) molecular magnets show unusual field-induced metamagnetic behavior from the ferrimagnetic ground state to the ferromagnetic state. Field dependence of magnetization of the cyano-bridged Gd (III)-Cr (III) complexes shows unusual field-induced metamagnetic behavior from the ferrimagnetic ground state to the ferromagnetic state.
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寇会忠, Hui-Zhong Kou, *, † Bei Chuan Zhou, † Dai-Zheng Liao, ‡ Ru-Ji Wang, † and Yadong Li†
Inorganic Chemistry, Vol. 41, No.25, 2002,-0001,():
-1年11月30日
Two cyano-bridged Ni (II) -Fe (III) complexes {(H3O)[Ni(H2L)]2[Fe(CN)6]2‚[Fe(CN)6]‚6H2O}n (1) and [K(18-C-6)(H2O)2]-[Ni(H2L)]2[Fe(CN)6]3‚4 (18-C-6)‚20H2O (2) (L) 3,10-bis (2-aminoethyl)-1, 3, 6, 8, 10, 12-hexaazacyclotetradecane, 18-C-6) 18-crown-6-ether) have been synthesized and characterized structurally and magnetically. Complex 1 has a zigzag one-dimensional structure, in which two trans-CN-ligands of each [Fe(CN)6] 3-link two trans- [Ni(H2L)] 4+groups, and in turn, each trans-[Ni(H2L)]4+ links two [Fe(CN)6]3-in a trans fashion. Complex 2 is composed of cyano-bridged pentanuclear molecules with moieties connected by the trans-CN- ligands of [Fe(CN)6]3-. Magnetic studies show the existence of ferromagnetic Ni (II) -Fe (III) interactions in both complexes. The intermetallic magnetic coupling constant of both complexes was analyzed by using an approximate model on the basis of the structural features.
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寇会忠, Zhong-Hai Ni, † Hui-Zhong Kou, *, † Lei Zheng, † Yi-Hua Zhao, † Li-Fang Zhang, † Ru-Ji Wang, † Ai-Li Cui, † and Osamu Sato‡
Inorganic Chemistry, Vol. 44, No.13, 2005,-0001,():
-1年11月30日
Two new cyano-bridged heterobinuclear complexes, [MnII(phen)2Cl][FeIII(bpb)(CN)2]‚0.5CH3CH2OH‚1.5H2O (1) and [MnII(phen)2Cl][CrIII(bpb)(CN)2]‚2H2O (2) [phen) 1,10-phenanthroline; bpb2-) 1,2-bis (pyridine-2-carboxamido)-benzenate], and four novel azido-bridged Mn(II) dimeric complexes, [Mn2(phen)4(Ì1,1-N3)2][MIII(bpb)(CN)2]2‚H2O [M) Fe (3), Cr (4), Co (5)] and [Mn2(phen)4(Ì1,3-N3)(N3)2]BPh4‚0.5H2O (6), have been synthesized and characterized by single-crystal X-ray diffraction analysis and magnetic studies. Complexes 1 and 2 comprise [Mn(phen)2Cl]+and [M(bpb)(CN)2]-units connected by one cyano ligand of [M(bpb)(CN)2]-. Complexes 3-5 are doubly end-on (EO) azido-bridged Mn (II) binuclear complexes with two [M(bpb)(CN)2]- molecules acting as charge-compensating anions. However, the Mn (II) ions in complex 6 are linked by a single end-to-end (EE) azido bridging ligand with one large free BPh4-group as the charge-balancing anion. The magnetic coupling between Mn (II) and Fe (III) or Cr (III) in complexes 1 and 2 was found to be antiferromagnetic with JMnFe) -2.68 (3) cm-1 and JMnCr) -4.55 (1) cm-1 on the basis of the Hamiltonian Hˆ)-JSˆMn SˆM(M) Fe or Cr). The magnetic interactions between two Mn (II) ions in 3-5 are ferromagnetic in nature with the magnetic coupling constants of 1.15 (3), 1.05 (2), and 1.27 (2) cm-1 (Hˆ) -JSˆMn1 SˆMn2), respectively. The single EE azido-bridged dimeric complex 6 manifests antiferromagnetic interaction with J)-2.29 (4) cm-1 (H) -JSˆMn1 SˆMn2). Magneto-structural correlationship on the EO azido-bridged Mn (II) dimers has been investigated.
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寇会忠, Hui-Zhong Kou, * Bei Chuan Zhou, and Ru-Ji Wang
Inorganic Chemistry, Vol. 42, No.23, 2003,-0001,():
-1年11月30日
A series of cyano-bridged heterotrimetallic complexes [CuL]2Ln (H2O) 2M (CN) 6‚7H2O have been synthesized by the reactions of CuL (L2-) dianion of 1,4,8,11-tetraazacyclotradecane-2,3-dione), Ln3+ (Ln) Gd or La), and [M(CN)6] 3-(M) Co, Fe, or Cr). X-ray diffraction analysis reveals that these complexes are isostructural and have a novel chain structure. The Ln3+ ion is eight-coordinated by six oxygen atoms of two CuL and two water molecules and two nitrogen atoms of the bridging cyano ligands of two [M(CN)6]3-, while the [M(CN)6]3- anion connects two Ln3+ using two trans-CN-ligands giving rise to a chainlike structure. In the chain, every CuL group tilts toward the CNligand of adjacent [M(CN)6]3- with the Cu-Ncyano contacts ranging from 2.864 (6) to 2.930 (6) Å. Magnetic studies on the CuGdCo complex (1) indicate the presence of ferromagnetic coupling between Cu (II) and Gd (III). The CuLaCr (5) and CuLaFe (2) complexes exhibit ferromagnetic interaction between paramagnetic Cu(II) and Cr(III)/Fe (III) ions through the weak cyano bridges (Cu-Ncyano) 2.930(6) Å for 2). A global ferromagnetic interaction is operative in the CuGdFe complex (3) with the concurrence of dominant ferromagnetic Cu (II) -Gd (III) and minor antiferromagnetic Gd (III)-Fe (III) as well as the ferromagnetic Cu (II)-Fe (III) interaction. For the CuGdCr complex (4), an overall antiferromagnetic behavior was observed, which is attributed to the presence of dominant antiferromagnetic CrIII-GdIII coupling and the minor ferromagnetic CuII-GdIII and CuII-CrIII interaction. Moreover, a spin frustration phenomenon was found in complex 4, which results from the ferro-ferro-antiferromagnetic exchanges in the trigonal Cu-Gd-Cr units. The magnetic susceptibilities of these complexes were simulated using suitable models. The magneto-structural correlation was investigated. These complexes did not show a magnetic phase transition down to 1.8 K.
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寇会忠, Hui-Zhong Kou, * Yun-Bo Jiang, Bei Chuan Zhou, and Ru-Ji Wang
Inorganic Chemistry, Vol. 43, No.10, 2004,-0001,():
-1年11月30日
Two unique cyano-bridged 2D coordination polymers have been synthesized and characterized structurally and magnetically. The complexes contain two polyaza Cu (II) units and one novel macromolecular Cu (II) moiety, which have been synthesized via one-pot metal template condensation reactions involving ethylenediamine (en) and formaldehyde. Self-assembly of the polyaza CuII mixture with [Cr(CN)6]3- gave rise to two layered complexes. One complex contains unprecedented covalently linked polymeric CuII chains and cyano-bridged CuII-CrIII coordination chains, which are interwoven to form a novel layer. The other complex shows intriguing encapsulation of [Cr(CN)6]3-anions. Intermetallic ferromagnetic coupling is operative within the bridged 2D layer. The magnetic susceptibilities of both complexes were simulated using approximate models.
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