杂铜(I)-膦配合物由于结构多样,具有光物理和催化特性而备受关注。在这项工作中,使用设计的联吡啶(L1-L4)和双齿多膦(L5-L8)作为功能性配体,定量合成了一系列杂二亚胺-二膦铜(I)复合物(C1-C10)。这些混合的配体-铜(I)配合物已通过1 H和13 C NMR光谱,电喷雾电离质谱(ESI-MS)和元素分析得到了充分表征。配合物C1,C2的详细结构,C5,C6,C9和C10被单晶X射线衍射分析证实。此外,这些磷化氢– Cu(I)络合物在固态或溶液中在紫外光激发下均表现出强烈的发射。发射复合物C1-C4以猝灭方式(关断)显示出对银离子的高灵敏度发光感测。此外,所有磷化氢保护的铜(I)配合物对水中的叠氮化物-炔烃环加成(CuAAC)都表现出高催化活性。
Rh(III)-catalyzed switchable annulation of 2,2′-bipyridine N-oxides with internal alkynes via dual C–Hbondactivation has been developed. Tuning the reaction conditions enabled the reaction pathway to be switched between rollover and nonrollover annulation, delivering 5,6-disubstituted-1,10-phenanthrolines and 5,6,7,8-tetrasubstituted-1-(pyridin-2-yl)isoquinoline 2-oxides in high yields, respectively
We synthesized the novel seco cyclopropa[c]pyrrolo[3,2-e]indole (CPI) bisalkylators and evaluated their antitumor activity. Among these derivatives, 11a (AT-760), in which the two seco 3-methoxycarbonyl-2-trifluoromethyl CPI (MCTFCPI) moieties are connected with a 3,3'-(1,4-phenylene)bisacryloyl group, was found to exhibit more potent cytotoxicity and antitumor activity against HeLaS3 human uterine
Synthesis and crystal structure of two new lead(II) coordination polymers with substituted 2,2′-bipyridine ligands with dicyanamide and nitrate as co-ligands
Abstract The two lead(II) coordinationpolymers [Pb(4,4′-dm-2,2′-bpy)(Dca)(NO3)]n (1) and [Pb(4,4′-dmo-2,2′-bpy)(Dca)(NO3)]n (2) were prepared by treatment of lead(II) nitrate, sodium dicyanamide with 4,4′-dimethyl-2,2′-bipyridine and 4,4′-dimethoxy-2,2′-bipyridine, respectively. Both polymers were characterized by elemental analysis, IR and 1H NMR spectroscopy, thermogravimetric analysis and X-ray
Oxygen Evolution from Water Catalyzed by Mononuclear Ruthenium Complexes with a Triazamacrocyclic Ligand in a Facial Fashion
作者:Masaki Yoshida、Shigeyuki Masaoka、Ken Sakai
DOI:10.1246/cl.2009.702
日期:2009.7.5
[Ru(tmtacn)(R2bpy)(OH2)]2+ (tmtacn = 1,4,7-trimethyl-1,4,7-triazacyclononane; R2bpy = 4,4′-disubstituted-2,2′-bipyridines, R=H, Me, and OMe) with tmtacn ligated in a facial fashion is found to be active as O2-evolving catalysts. It is also found that the stronger electron-donating character of R2bpy gives rise to the higher O2-evolving activity.
Homogeneous Catalytic System for Photoinduced Hydrogen Production Utilizing Iridium and Rhodium Complexes
作者:Eric D. Cline、Samantha E. Adamson、Stefan Bernhard
DOI:10.1021/ic800988b
日期:2008.11.17
An efficient homogeneous catalytic system for the visible-light-induced production of hydrogen from water utilizing cyclometalatediridium(III) and tris-2,2'-bipyridyl rhodium(III) complexes is described. Synthetic modification of the photosensitizer Ir(C--N) 2(N--N) (+) and water reduction catalyst Rh(N--N) 3 (3+) creates a family of catalysts with diverse photophysical and electrochemical properties
描述了一种有效的均相催化系统,用于利用环金属化的铱(III)和tris-2,2'-联吡啶基铑(III)络合物从水中可见光诱导的氢气生产。光敏剂Ir(C--N)2(N--N)(+)和减水催化剂Rh(N--N)3(3+)的合成改性产生了具有多种光物理和电化学性质的催化剂系列。各种催化剂组合和光反应条件的平行筛选可实现优化光催化系统的快速开发,该系统可实现超过5000次的转换,其量子产率((1)/ 2 H 2吸收的每个光子)大于34%。优化系统的光物理和电化学特性表明,还原淬灭途径为形成[Rh(N--N)2](0)提供了必要的驱动力。汞或CS 2对系统中毒的测试提供了有力的证据,表明该系统是用于光催化制氢的真正均质系统。