Ligand-bridged homo- and hetero-binuclear carbonyl polypyridyl complexes of ReI: syntheses, electronic spectra, redox, and luminescence behaviour
作者:Kuppuswamy Kalyanasundaram、Mohammad K. Nazeeruddin
DOI:10.1039/dt9900001657
日期:——
Electronic absorption data, redox potentials, and photophysicalproperties are reported for a series of mono- and ligand-bridged bi-nuclear carbonyl polypyridyl complexes of ReI: [ReCl(CO)3}nLb] and [(OC)3ClRe(Lb)M(bipy)2]2+[bridging ligand (Lb)= 2,3-bis(2′-pyridyl)pyrazine (dpp) or 2,3-bis(2′-pyridyl) quinoxaline(dpq); bipy = 2,2′-bipyridine; M = RuII or OsII; n= 1 or 2]. For all the binuclear complexes
报告了Re I的一系列单和配体桥联的双核羰基聚吡啶基络合物的电子吸收数据,氧化还原电势和光物理性质:Re [ReCl(CO)3 } n L b ]和[(OC)3 ClRe(L b)M(bipy)2 ] 2+ [桥联配体(L b)= 2,3-双(2'-吡啶基)吡嗪(dpp)或2,3-双(2'-吡啶基)喹喔啉( dpq); bipy = 2,2'-联吡啶; M = Ru II或Os II ; ñ= 1或2]。对于所有检查的双核配合物,电子吸收和电化学数据表明在双核作用下配体π*轨道的广泛稳定。这些也是重的强耦合配体桥联的二聚配合的第一例我的是在室温下在溶液表现出致发光(电荷转移型)。关于Re和Ru的异双核配合物的发射最大值和寿命的数据证实了较早的迹象,即发射状态基本上位于Ru→L b电荷转移上。
Spectroelectrochemistry and excited-state absorption spectroscopy of rhenium(<scp>I</scp>)α,α′-diimine complexes
作者:Yoke Foo Lee、Jon R. Kirchhoff、Robert M. Berger、David Gosztola
DOI:10.1039/dt9950003677
日期:——
reduced forms of [Re(bipy)(CO)3Cl], [Re(dpp)(CO)3Cl] and [Re(CO)3Cl}2(dpp)][dpp = 2,3-bis(2-pyridyl)pyrazine, bipy = 2,2′-bipyridine]. Following the first reduction of each complex, the spectra exhibit similar absorption features in the near-UV region from 350 to 400 nm with a tailing absorption to ca. 500–600 nm. The excited-state absorption spectra of [Re(dpp)(CO)3Cl] and [Re(CO)3Cl}2(dpp)] have also
Ruthenium chromophores containing terpyridine and a series of polyazine bridging ligands
作者:Lisa M. Vogler、Cristian Franco、Sumner W. Jones、Karen J. Brewer
DOI:10.1016/0020-1693(94)03975-5
日期:1994.6
monometallic Ru(II) complexes have been synthesized with the general formula [Ru(tpy)(BL)Cl] + and [Ru(tpy)(BL)(py)] 2+ and their spectroscopic, electrochemical and photochemical properties studied (where tpy=2,2′:6′,2″-erpyridine and BL=bridging ligand). The bridging ligands utilized in these complexes were 2,3-bis(2-pyridyl)pyrazine (dpp), 2,3-bis(2-pyridyl)quinoxaline (dpq) and 2,3-bis(2-pyridyl)benzoquinoxaline
Pushing the limits of structurally-diverse light-harvesting Ru(II) metal-organic chromophores for photodynamic therapy
作者:Roberto Padilla、William A. Maza、Anthony J. Dominijanni、Brenda S.J. Winkel、Amanda J. Morris、Karen J. Brewer
DOI:10.1016/j.jphotochem.2016.02.006
日期:2016.5
λem = 663 nm for 2 and 3, respectively, while the anthracene motif(s) has emission from 450–560 nm. The anthracene unit(s) quench the 3MLCT to give quantum yields (lifetime, τ) of Φem = 0.0059 (τ = 398 ns) and Φem = 0.0011 (τ = 414 ns) for 2 and 3, respectively. The quenching rates were found to be 6.61 × 105 s−1 for 2 and 5.64 × 105 s−1 for 3. Electrochemistry reveals an irreversible anthracene oxidation
Ru(II)衍生物[(AnthbpyMe)(bpy)Ru(dpp)] 2+(2)和[(AnthbpyMe)2 Ru(dpp)] 2+(3)的合成及其激发态性质分析以及它们对神经胶质瘤细胞的光细胞毒性已有报道。配合物2和3吸收带的金属到配位体电荷转移(MLCT)跃迁可见光在λ最大 = 459纳米(16000中号-1 厘米-1)和λ最大 = 461纳米(21000中号-1 厘米-1),分别。配合物表现出双色性质,其中3MLCT发射中心位于λ EM = 661 nm和λ EM =对于663纳米2和3分别,而蒽基序(一个或多个)具有450-560 nm发射。蒽单元(一个或多个)淬灭3 MLCT,得到的量子产率(寿命,τ)的Φ EM = 0.0059(τ = 398纳秒)和Φ EM = 0.0011(τ = 414纳秒)为2和3,分别。淬火率被发现是6.61×10 5 小号-1为2和5.64×10
[EN] HYDROGEN PEROXIDE CATALYZED PROCESS FOR THE PREPARATION OF STERICALLY HINDERED N-HYDROCARBYLOXYAMINES<br/>[FR] PROCEDE DE CATALYSE DU PEROXYDE D'HYDROGENE POUR PREPARER DES N-HYDROCARBYLOXYAMINES STERIQUEMENT ENCOMBREES
申请人:CIBA SC HOLDING AG
公开号:WO2005005388A1
公开(公告)日:2005-01-20
Sterically hindered N-hydrocarbyloxyamines (I) are prepared from hindered amine N-oxyl compounds (II) by a process which uses peroxide or a hydrogen peroxide equivalent, a catalytic amount of a peroxide decomposing transition metal salt, metal oxide, or metal-ligand complex, a hydrocarbon solvent containing no activated hydrogen atoms, and an inert cosolvent, These compounds are useful as thermal and light stabilizers for a variety of organic substrates.