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1.
New binuclear complexes with [Cu(PPh3)3]+ and [Cu(PPh3)(N—N)]+ (N—N – 2,2-bipyridine, 1,10-phenanthroline) moieties connected via the isocyanide group to [Ru(bpy)2(py)]+ and [Ru(phen)2(py)]+ have been prepared and isolated as PF6
– salts. In addition, new trinuclear complexes, [{(PPh3)3Cu(-NC)}2Ru(bpy)2](PF6)2 and [{(N—N)-(PPh3)Cu(-NC)}2Ru(bpy)2](PF6)2, have been synthesized using [Ru(bpy)2(CN)2]. The complexes have been characterized by elemental analyses, i.r., n.m.r., u.v.–vis., FAB mass spectra and by conductivity measurements. The i.r. spectra reveal an increase in v;(CN) in the isocyano-bridged complexes compared to the mononuclear parent complexes. The complexes are luminescent with emission wavelengths in the 458–550 and 600–636 nm ranges. The half wave reduction potentials in MeCN are always more positive than those of the parent complexes. It is observed that the isocyano-bridged complexes are more powerful excited state reductants than the cyano-bridged, Cu(I)(-CN)Ru(II) complexes. 相似文献
2.
《Tetrahedron letters》2017,58(37):3643-3645
A series of glucosylated mono- and di-(1H-1,2,3-triazol-4-yl)pyridines were prepared from glucosyl azides and 2-ethynyl and 2,6-diethynyl pyridine via Click reaction. Glucosylation of the silver salt of 4-hydroxy-2,2′-bipyridine with acetobromoglucose afforded the corresponding glucosylated 2,2′-bipyridine. Treatment of five examples of the latter pyridine ligands with [cis-Ru(bipy)2Cl2], [Ru(tpy)Cl3] or [Pd(COD)Cl2] gave the corresponding ruthenium(II) and palladium(II) complexes in 62%-quantitative yield. 相似文献
3.
cis-[CrIII(phen)2(H2O)2]3+ and cis-[CrIII(bipy)2(H2O)2]3+ (phen = 1,10-phenanthroline and bipy = 2,2-bipyridine) were readily oxidized by either PbO2 or PhIO to form the chromium(V) complexes [CrV(phen)2(O)2]+ and [CrV(bipy)2(O)2]+ respectively, which were characterized by elemental analysis, i.r. and e.s.r. spectroscopy. 相似文献
4.
Chang-Jiu Wang Wen-Fang Xu Bi-Hai Tong Ai-Quan Jia 《Journal of Coordination Chemistry》2017,70(10):1617-1631
Eight substituted bidentate Schiff base ligands HOC6H4CH=N-R (HL) (HL1: R = 4-ClC6H4, HL2: R = 2-ClC6H4, HL3: R = 4-NO2C6H4, HL4: R = 4-MeC6H4, HL5: R = 2,6-Me2C6H3, HL6: R = 2,46-Me3C6H2, HL7: R = CH2C6H5, and HL8: R = n-Pr) were synthesized by the typical condensation reaction. Interaction of cis-[Ru(bpy)2Cl2]?2H2O (bpy = 2,2′-bipyridine) with one equivalent of HL ligand in the presence of KPF6 afforded the cationic ruthenium(II) complexes of the type [Ru(bpy)2(L)](PF6) (1–8). The reaction of cis-[Ru(phen)2Cl2]?2H2O (phen = 1,10-phenanthroline) and HL1 under similar condition gave complex [(phen)2Ru(L)](PF6) (1a). Treatment of cis-[Ru(phen)2Cl2]?2H2O with two equivalents of HL in the presence of KPF6 resulted in isolation of the cationic ruthenium(III) complexes of the type [Ru(phen)(L)2](PF6) (9-16). All complexes have been spectroscopically characterized. The structures of 1a?CH2Cl2, 2?½CH2Cl2, 3?CH3CN, 5?½H2O, 6, 12?½HOCH2CH2OH, 13?CH3CN, 15?H2O, and 16 have been determined by single-crystal X-ray diffraction. 相似文献
5.
《Journal of organometallic chemistry》1986,301(2):203-208
A cyclometallated analogue of the well-known tris(2,2′-bipyridine)ruthenium(II) cation has been prepared from 2-phenylpyridine. The bis(2,2′-bipyridine)(2-phenylpyridine-C,N)ruthenium(II) cation is readily prepared from [Ru(bipy)2Cl2] and 2-phenylpyridine in the presence of silver(I); the spectroscopic and electrochemical properties of this species are compared with those of [Ru(bipy)3]2+. 相似文献
6.
《Electrochemistry communications》2000,2(3):190-194
The electrochemical behaviour of tris(2,2′-bipyridine)ruthenium(II) hexafluorophosphate (Ru(II)) microparticles, immobilised on a graphite electrode and adjacent to an aqueous electrolyte solution, has been studied by cyclic voltammetry and an in situ spectroelectrochemical technique. The solid Ru(II) complex exhibits one reversible redox couple with a formal potential (Ef) of 1.1 V versus Ag¦AgCl. The continuous cyclic voltammetric experiments showed that the Ru(II) microparticles are stable during the electrochemical conversions. The in situ spectroelectrochemical study showed that the absorbance at 463 nm decreased due to the oxidation of Ru(II) to Ru(III). Upon reduction, the growth of absorbance at 463 nm was observed due to the formation of Ru(II) complex and this process was reversible. 相似文献
7.
《Journal of Inorganic and Nuclear Chemistry》1981,43(12):3181-3182
A reinvestigation of the photolysis of [Ru(bipy)3](NCSe)2 in ethanol under dinitrogen has failed to give the previously reported [Ru(N3)2bipy2] but, under appropriate conditions, may yield the complex [Ru(NCO)2bipy2]. 相似文献
8.
《Tetrahedron: Asymmetry》2001,12(16):2289-2293
The chiral [5-(4-hydroxybutyl)-5′-methyl-2,2′-bipyridine]-bis(2,2′-bipyridine)-ruthenium(II)-bis(hexafluoroantimonate) complex 3 was prepared and characterized by different NMR techniques and successfully separated into enantiomers by electrokinetic chromatography using anionic carboxymethyl-β-cyclodextrin as chiral mobile phase additive (CMPA). The optimum separation conditions were obtained with 40 mM borate buffer at pH 9.5 and 7.5 mg/mL of the chiral selector at 20°C. 相似文献
9.
《Journal of Coordination Chemistry》2012,65(24):4358-4366
New mixed-ligand complexes, [M2(BAMP)(bipy)2][MCl4]2, M=Co+2(1), Cu+2(2), [M2(TAMEN)(bipy)2][MCl4]2, M=Fe+2(3), Co2+(4), and [Fe2(TAMEN)(bipy)2][FeCl6]2 (5), where BAMP and TAMEN stand for the Mannich bases N,N′-bis(antipyryl-4-methylene)-piperazine and N,N′-tetra(antipyryl-4-methylene)-1,2-ethane-diamine, respectively, have been obtained and characterized by elemental analyses, conductometric and magnetic susceptibility measurements at room temperature, mass spectrometry, UV-Vis, infrared, and mass spectroscopy, and 1H NMR spectra for the ligands. 相似文献
10.
11.
Utilization of 5′-amino-2,2′-bipyridine-5-carboxylic acid allows molecular design of ruthenium tris(bipyridine)-type complexes bearing two different functional groups. In this study, a novel ruthenium tris(bipyridine) derivative bearing viologen and tyrosine as an electron acceptor and donor, respectively, is synthesized. This synthesis exemplifies the effectiveness of the molecular design for functionalizing ruthenium bipyridine-type complexes. The photophysical properties are discussed in comparison with a reference ruthenium complex which has neither the electron acceptor nor donor. 相似文献
12.
《Journal of Coordination Chemistry》2012,65(11):1872-1881
Two lead(II)-thiocyanato coordination polymers with 5,5′-dimethyl-2,2′-bipyridine (5,5′-dm-2,2′-bpy) and 4,4′-dimethoxy-2,2′-bipyridine (4,4′-dmo-2,2′-bpy) as chelating ligands were synthesized and characterized by elemental analysis, IR and 1H-NMR spectroscopy, thermal behavior, and X-ray crystallography. These complexes have formulas [Pb(5,5′-dm-2,2′-bpy)(NCS)2] n (1) and [Pb(4,4′-dmo-2,2′-bpy)(NCS)2] n (2). The coordination numbers of PbII in 1 and 2 are four, PbN4, with “stereo-chemically active” electron pairs and hemidirected coordination spheres. Considering Pb···S as weak bonds, 1 and 2 are 1- and 2-D coordination polymers, respectively. The supramolecular features in these complexes are guided/controlled by weak directional intermolecular interactions. 相似文献
13.
Vera R. L. Constantino Luiz F. C. de Oliveira Paulo S. Santos Henrique E. Toma 《Transition Metal Chemistry》1994,19(1):103-107
Summary The synthesis, spectra and electrochemistry of [Ru(bipy)2-(picOH)]+ and -picO-[Ru(bipy)2]2
2+ (bipy = 2,2-bipyridine and picOH = 3-hydroxypicolinate ion) are described. The spectroscopic properties in the visible region are dominated by the intense Ru bipy chargetransfer transitions. In the binuclear complex, the two [Ru(bipy)2L]2+ moieties are nonequivalent, exhibiting E
1/2 = 0.69 and 1.20 V versus s.h.e. The partially oxidized species exhibits a weak intervalence transfer band at 1085 nm, and is consistent with a Robin-Day class II mixed valence complex. 相似文献
14.
Hui Li Wei Yuan Luyi Zou Xingdong Wang Hongmei Zhan Yanxiang Cheng 《Transition Metal Chemistry》2018,43(3):231-241
Eight pairs of cis–trans isomeric homoleptic platinum(II) complexes based on N-alkyl- or aryl-substituted 2,2′-biimidazole ligands were synthesized, and their photophysical properties were investigated. The cis and trans isomers readily interconvert at slightly elevated temperature, implying that the activation barrier for this process is low. Single crystal X-ray diffraction analysis revealed that the complexes have an ideal square-planar geometry. Their UV–Vis spectra showed lower energy absorption bands in the range of 345–378 nm, which are assigned to the typical MLCT mixed with LC transitions. In frozen glass solution at 77 K and also in the powder state, these complexes exhibit green emission ranging from 440 to 540 nm with photoluminescence quantum yields of 3.3–24.4%. The emitting excited state is dominated by 3ππ* character with some contributions from 3MLCT according to the excitation spectra. 相似文献
15.
Investigation of complexes of zinc(II) and cadmium(II)DI-n-butyldithiocarbamates with 2,2′-bipyridyl
A. V. Ivanchenko S. A. Gromilov S. M. Zemskova I. A. Baidina 《Journal of Structural Chemistry》2000,41(1):88-95
A new mixed-ligand complex, Cd(S2CN(C4H9)2 2)2(2,2′-Bipy), was synthesized. A polycrystal X-ray diffraction analysis was performed (DRON-3M and DRON-UM1 diffractometers, CuKα radiation, Ni filter) and the crystal structure was determined [Enraf-Nonius CAD-4 automatic diffractometer, MoKα radiation, 2440 nonzero independent reflections, 153 refined structural parameters, R is 0.11 for I>2σ(I)]. Crystal data for C28H44CdN4S4 : a = 28.716(4), b = 6.848(6), c = 17.188(2) Å, space group Pcca, V-3380.2(7) Å3, Z = 4, M = 679.42, dcaU.= 1.335 g/cm3. The structure consists of monomeric molecules in which the cadmium atom has a distorted octahedral environment. The polycrystal diffraction analysis revealed that the complex is isostructural with the defined complex Zn(S2CN(C4Hg)2)2(2,2′-Bipy). A crystal-chemical search on metal dialkyldithiocarbamates in the Cambridge Structural Database was accomplished and isostructural pairs of Zn and Cd metal complexes were found. 相似文献
16.
《Journal of Coordination Chemistry》2012,65(1):78-86
The reaction of Brønsted acids with cis-[Ru(bpy)2(CO3)] (bpy?=?2,2′-bipyridine) under CO results in cleavage of the carbonato ligand and formation of cationic cis-[Ru(bpy)2(CO)L] n + complexes [L?=?ONO2 (1 +), OH2 (2 2+), Cl (3 +), OCOH (4 +), and OCOCH3 (5 +)]. The structures of 1 + and 2 2+ were confirmed by single-crystal X-ray diffraction. Crystal data for 1(PF6): monoclinic, P21/c, a?=?10.5242(3), b?=?15.4727(3), c?=?14.6571(3) Å, β?=?92.3219(9)°, V?=?2384.77(9) Å3, Z?=?4, D calcd?=?1.806?g cm?3, 5460 unique reflections (R int?=?0.032), R 1?=?0.0540 [I?>?2σ(I)], wR 2?=?0.1642 (all reflections); crystal data for 2(ClO4)2?·?H2O: monoclinic, C2/c, a?=?20.4247(7), b?=?10.0777(3), c?=?15.6039(5) Å, β?=?127.7569(8)°, V?=?2539.31(14) Å3, Z?=?4, D calcd?=?1.769?g cm?3, 2895 unique reflections (R int?=?0.036), R 1?=?0.0343 [I?>?2σ(I)], wR 2?=?0.0907 (all reflections). Except for 2(PF6)2 the complexes exhibit oxidation at 1.02–1.30?V versus Fc+/Fc in acetonitrile. Bipyridine-centered reductions are also observed; these redox potentials depend on the nature of L. This convenient synthesis will be useful for producing cis-[Ru(bpy)2(CO)L] n +-type complexes in high yield. 相似文献
17.
Ryuichi Arakawa Fumikazu Matsuda Genetsu Matsubayashi Takekiyo Matsuo 《Journal of the American Society for Mass Spectrometry》1997,8(7):713-717
Photo-oxidation of Ru(bpy)2(en)2+, where bpy = 2,2′-bipyridine, en = ethylenediamine, was studied in isotopic labeling experiments by using on-line electrospray mass spectrometry (ESMS). The complex was known to undergo photochemical dehydrogenation of a fourelectron oxidation, giving the α,α′-diimine complexes in a stepwise manner via a two-electron-oxidized intermediate that represents loss of two hydrogen atoms from the en ligand. On-line mass analysis after photoirradiation (λ > 420 nm) of Ru(bpy)2(ed)2+ (ed = ethylene-d4diamine) showed that the ligand of the intermediate with loss of two hydrogen atoms was not an enamine but had an imine structure. Also, a ligand-oxygenated complex that has mass 14 amu higher than the Ru(bpy)2(en)2+ complex was observed in the ES mass spectra. The ligand of this complex was proposed to have a nitroso structure as a primary product in 18O2 experiments. The oxygenated complex was not generated in a stepwise manner via the imine intermediate, but directly by loss of two amino hydrogen atoms and addition of an oxygen atom. The source of the oxygen atom would be from oxygen dissolved in solution rather than from water in solution. Another oxygenated complex Ru(bpy)2(NO 2 #x2212; )+ was produced by irradiation and the structure was identified in 18O2 experiments. 相似文献
18.
《Tetrahedron: Asymmetry》1998,9(4):531-534
A number of chiral C1-symmetric 2,2′-bypyridines were prepared and assessed in the enantioselective palladium catalyzed allylic substitution of 1,3-diphenylprop-2-enyl acetate with dimethylmalonate. Enantioselectivity up to 89% was obtained. 相似文献
19.
20.
Noha Said Bedowr Rosiyah Binti Yahya Nesrain Farhan 《Journal of Saudi Chemical Society》2018,22(3):255-260
This paper presents synthesis, structural characterization and spintronic applications of copper (II) tetradecanoate derived magnetic complexes. The complexes were prepared by a chemical reaction between [Cu2(CH3(CH2)12COO)4](EtOH)2 and 2,2′-bipyridine-4,4′-bipyridine ligands respectively. The complexes were further reacted between the product of the first reaction and 4,4′-bipyridine-2,2′-bipyridine respectively. The structural characterization techniques included elemental analysis, Fourier transformed infrared spectroscopy (FTIR), Ultra-violet–Visible (UV–Vis) spectroscopy, polarized optical microscopy, magnetic moment and thermogravimetric analysis. The structural and characterization results suggested that the synthesized complexes were binuclear and mononuclear covalent complexes of copper(II) with structural formulas [Cu2(η2-(OOCR)4](4,4′-bpy)2H2O] and [Cu(η1-(OOCR)2(2,2′-bpy) (4,4′-bpy)] respectively. 相似文献