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1Author    Claus Feldm, M. Artin, Jansen5Requires cookie*
 Title    O ptische A b sorp tion der A uride M3A11O ( Optical Absorption of the Aurides M3AuO (M = K, Rb, Cs)  
 Abstract    The optical absorption of the aurides M3AuO (M = K, Rb, Cs) and CsAu has been determ inated by UV/VIS spectroscopy. The band gaps have been found to be 2,35(2) eV (Cs3AuO) and 2,30(2) eV (CsAu). This corresponds to a more pronounced anionic character of gold in Cs3AuO as com pared to CsAu. In the case of K3AuO and R b3AuO no band gap was detectable. 
  Reference    Z. Naturforsch. 51b, 607—608 (1996); eingegangen am 24. Juli 1995 
  Published    1996 
  Keywords    Aurides, Optical A bsorption, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0607_n.pdf 
 Identifier    ZNB-1996-51b-0607_n 
 Volume    51 
2Author    Hans Bock, Klaus Ziemer, Christian Näther, Holger Schödel, Markus Kleine, Mark SievertRequires cookie*
 Title    Donator/Akzeptor-Komplexe von Alkyl-und Aminobenzolen, Anthracen oder Pyren mit l,3,5-Cyan-/Nitro-benzolen: Kristallisation, Strukturen und Elektronenspektren Interactions in Crystals, 89 [ 1 -3] Donor/Acceptor Complexes of Alkyl and Aminobenzenes, Anthracene or Pyrene and 1,3,5-Cyano/nitro-benzenes: Crystallisation, Structures and Electronic Spectra  
 Abstract    The following mixed-stack donor/acceptor complexes {D • • • A}00 have been cry­ stallized and their structures determined: {hexam ethylbenzene--3,5-dicyano-l-nitroben­ zene hexamethylbenzene---3,5-dinitro-l-cyanobenzene}^, {pyrene- • -3,5-dinitro-l-cyano-ben zen e}^ , {anthracene---(3,5-dinitro-l-cyanobenzene)2}oo, {N,N-dimethylanilin---3,5-di-nitro-l-cyanobenzene}^ and { l^-phenylenediam ine-'-S^-dinitro-l-cyanobenzene}^. Their lattice packing consists of parallel layers, which contain either donors and acceptors as for hexamethylbenzene and pyrene or composite ones as in the 1:2 complex of anthracene with each one of the acceptors above and below its peripheral rings. The isostructural hexamethyl­ benzene complexes exhibit almost identical packing coefficients as well as a hexagonal coplanar arrangement of the C6(CH 3)6 donors. Weak intermolecular van der Waals interactions are also observed between antiparallel cyano substituents. The interplanar n distances range between 334 and 353 pm, /. e. around 340 pm of two van der Waals n radii. In none of the complexes, however, significant structural changes in either the donor or the acceptor components due to the complex formation are observed. In both the crystals as well as in solution, the donor/acceptor complexes exhibit colours between yellow and red; their long-wavelength charge transfer ab­ sorption maxima, therefore, correspond to a lowering in excitation energy of only up to 1 eV relative to that of the components. The different charge transfer in the ground and the CT excited states is also discussed referring to other data such as vertical first ionization energies or interplanar distances {D---A}, as well as to results from semiempirical calculations based on the crystal structure data determined and including approximate configuration interaction. Wechselwirkungen in Kristallen, 89 [1 -3] A u sgan gsp u n k te 
  Reference    Z. Naturforsch. 51b, 1538—1554 (1996); eingegangen am 27. Dezember 1995 
  Published    1996 
  Keywords    Donor/Acceptor-Complexes, Single Crystal Structures, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1538.pdf 
 Identifier    ZNB-1996-51b-1538 
 Volume    51 
3Author    Horst Grünewald, Heiner HomborgRequires cookie*
 Title    Darstellung und spektroskopische Charakterisierung von Nitridophthalocyaninatomangan(V) Preparation and Spectroscopical Characterization of Nitridophthalocyaninatom anganese(V)  
 Abstract    Nitridophthalocyaninatomanganese(V), M nN Pc(2-), has been prepared by oxidation of [Mn(OH):Pc(2-)]~ with chlorine in the presence of excess ammonia in dichloromethane as a chemically very stable, diamagnetic microcrystalline blue powder. The band at 1053 cm 1 in the infrared and resonance Raman spectra is assigned to v(Mn=N). The strong resonance en­ hancement of v(Mn=N) coincides with an electronic transition at 461 nm assigned to (N —> Mn) electron transfer. The UV-VIS spectrum in 1-chloronaphthalene is compared with that of the M nN Pc(2-)-H -,S04 adduct and the phthalocyanine-7r-cation radical [MnNPc(l -) ] +. 
  Reference    Z. Naturforsch. 45b, 483—489 (1990); eingegangen am 30. November 1989 
  Published    1990 
  Keywords    Nitridophthalocyaninatomanganese(V), IR Spectra, Resonance Raman Spectra, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-0483.pdf 
 Identifier    ZNB-1990-45b-0483 
 Volume    45 
4Author    W. Preetz, P. Hollmann, G. Thiele, H. HillebrechtRequires cookie*
 Title    Darstellung, Reaktionen und spektroskopische Charakterisierung von |O s2X8|2", X = Cl, Br, I, und Kristallstruktur von (P P N )2|O s2I8| * 2 CH2C12 Preparation, Reactions and Spectroscopic Characterization of [Os2X 8]2-, X = Cl, Br, I, and Crystal Structure o f (PPN )2[Os2I8] ■ 2 C H 2C12  
 Abstract    The triply bonded octahalogenodiosm ate(III) anions [Os2X 8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This com ­ pound was prepared by treating [Os2Cl8]2' with N al at room temperature in acetone solu­ tion. The structure determination by X-ray diffractometry on single crystals o f (P P N)2[Os2I8] • 2 C H 2C12, reveals crystallization in the m onoclinic system, space group P 2 ,/c with Z = 4. The O s~O s triple bond is with 2.212(1) Ä the longest within the three octahalogenodiosm ates(III). The Raman spectra show v(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2_ and for the iodo compound at 270.1 cm ' 1 with up to three overtones. The spectro­ scopic constants are calculated to be a», = 270.9 cm -1; X u = -0 .5 0 cm "1. The 10 K UV-VIS spectra o f solid [(/7-C4H9)4N ]2[Os2X 8] exhibit ö~n* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions o f 195, 211 and 183 cm -1 for X = Cl, Br, I, respectively. Oxidation o f [Os2X 8]2~, X = Cl, Br with the corresponding halogen leads to the cleavage o f the O s -O s bond, and the dekahalogenodiosm ates(IV), [Os2X l0]2-, are formed. 
  Reference    Z. Naturforsch. 45b, 1416—1424 (1990); eingegangen am 12. März 1990 
  Published    1990 
  Keywords    O ctaiododiosm ate(III), Synthesis, Crystal Structure, Raman, UV-VIS Spectra 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1416.pdf 
 Identifier    ZNB-1990-45b-1416 
 Volume    45 
5Author    M. =. Re, Tc, X. =. Ci, BrJ. Skowronek, W. PreetzRequires cookie*
 Title    Schwingungsspektren und Normalkoordinatenanalyse der Acetatohalogenodimetallate M 2( 0 2CCH3)4X2, M = Re, Tc; X = CI, Br Vibrational Spectra and Norm al Coordinate Analysis of Acetatohalogenodim etalates M 2( 0 2C CH 3)4X  
 Abstract    The orange-red Tc2(0 2C C H 3)4Br2 has been prepared for the first time by reaction of [Tc2Brg]2_ with glacial acetic acid and acetic anhydride. The IR and R am an spectra have been recorded at 80 K and are compared with those of the analogous com pounds Tc2(0 2CC H 3)4C12, Re2(0 2C C H 3)4Cl2 and Re2(0 2CC H 3)4Br2. The assignment according to the point group D 4h is supported by normal coordinate analysis based on a general valence force field. The quadruple M -M bond is stabilized by the bridging acetato and destabilized by the axial halogeno ligands. The valence force constants fd(MM) are determined to 3,96-4,08 mdyn/A. The inter­ action constants fdd(M M /M X), fdd(M M /M O) and fJM M /M M O) are ab o u t three times high­ er for the technetates as compared with the rhenates. The stronger interaction between oppo­ site bonds in the equatorial ligand sphere is revealed by the stretching interaction constants d d '' which are about two times higher than fdd for M -O bonds at right angles. The strong coupling of the ring co-ordinates implies extensive mixing of the M -O valence and deform ation modes. The electronic spectra of Tc2(0 2CC H 3)4X, agree with those of the corresponding Re com ­ pounds. 
  Reference    Z. Naturforsch. 47b, 482—490 (1992); eingegangen am 10. Oktober 1991 
  Published    1992 
  Keywords    Tetraacetatodihalogenodirhenates, Tetraacetatodihalogenoditechnetates, Vibrational Spectra, UV-Vis Spectra, Normal Coordinate Analysis 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0482.pdf 
 Identifier    ZNB-1992-47b-0482 
 Volume    47 
6Author    Rainer Bieganowski, Wilhelm FriedrichRequires cookie*
 Title    Über die Reaktion von Trifluorphosphin (PF3)  
 Abstract    Difluormethylphosphit (F2POCH3) und Trimethylphosphit [P(OCH3)3] mit Aquacobalamin in Methanol* On the Reaction of Trifluorophosphine (PF3), Difluoromethylphosphite (F2POCH3) and Trimethylphosphite [P(OCH3)3] with Aquacobalamin in Methanol 
  Reference    Z. Naturforsch. 35b, 1335—1340 (1980); eingegangen am 4. Juli 1980 
  Published    1980 
  Keywords    Vitamin B12, Fluoromethylphosphito-P-cobalamin, Dimethylphosphito-P-cobalamin, UV/VIS Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1335.pdf 
 Identifier    ZNB-1980-35b-1335 
 Volume    35 
7Author    Christian Reichardt, Ulrich RustRequires cookie*
 Title    Synthesen mit aliphatischen Dialdehyden, XXXII [1] Darstellung und Reaktionen N-substituierter 2-Aminomalondialdehyde Syntheses with Aliphatic Dialdehydes, XXXII [1] Syntheses and Reactions of N-Substituted 2-Aminomalondialdehydes  
 Abstract    The 2-amino malondialdehyde bis[dimethylacetal] 2 and some of its N-monosubstituted derivatives 7 a-d as well as the o-carboxy benzoyl malondialdehyde 12 have been prepared. With heterocyclic imonium salts these amino malondialdehyde derivatives form, by a twofold condensation reaction, the y-acylamino-substituted pentamethine cyanine dyes 15 a-c, 17, and 18a-b, the UV/Vis and 13 C NMR spectra of which are recorded with respect to the influence of the y-substituent on these spectra. 
  Reference    Z. Naturforsch. 37b, 236—245 (1982); eingegangen am 22. September 1981 
  Published    1982 
  Keywords    2-Aminomalondialdehyde Derivatives, y-Acylaminopentamethinecyanine Dyes, UV/Vis Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0236.pdf 
 Identifier    ZNB-1982-37b-0236 
 Volume    37 
8Author    Horst Elias, Elke Hilms, Helmut PaulusRequires cookie*
 Title    X-Ray Structures and Spectral Properties of 4-Coordinate Copper(II) and Palladium(II) Complexes with a Tridentate ONN-Schiff Base Ligand  
 Abstract    The tridentate mono-basic Schiff base N-(2-diethylaminoethyl)salicylaldimine =Hsal-en-NEt2 forms complexes 1 = [(sal-en-NEt2)MY] with divalent metals M (Y = halide). The preparation of three copper(II) complexes la (Y = Br), lb (Y = Cl), and lc (Y = SCN) and one palladium(II) complex 1(1 (Y = Cl) is described and the UV/VIS spectra of these complexes in methanol and chloroform are compared and discussed. The crystals of la • CHCI3, lb • CHCI3, and Id • CHCI3 are all isotypic and crystallize in the ortho-rhombic space group Pbca, whereas the solvent-free crystals of 1 b (and also 1 a) are monoclinic with the space group P2i/c. The metal is 4-coordinate with an almost planar ONNY donor atom arrangement around the palladium and with a distorted arrangement around the copper. The crystals consist of separate non-bridged complex units and the chloroform is not coordinated. 
  Reference    Z. Naturforsch. 37b, 1266—1273 (1982); received March 31 1982 
  Published    1982 
  Keywords    X-ray, UV/VIS Spectra, Tridentate ONN Schiff Base, Copper(II) Complexes, Palladium(II) Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1266.pdf 
 Identifier    ZNB-1982-37b-1266 
 Volume    37 
9Author    Hans Bock, Markus KleineRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung, 48 [1] Titrationen von Tetraphenyl-/?-benzochinon mit Natrium-und Kaliummetall in aprotischen Lösungen Electron Transfer and Ion Pair Formation, 48 [ 1 ] Titrations of Tetraphenyl-/?-benzoquinone with Sodium and Potassium Metals in Aprotic Solutions  
  Reference    Z. Naturforsch. 51b, 1222—1228 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    benzoquinone Reduction, Alkaline and Alkaline Earth Metals, Aprotic Solution, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1222.pdf 
 Identifier    ZNB-1996-51b-1222 
 Volume    51 
10Author    M. Ohsen, Safarpour Haghighi, Heiner HomborgRequires cookie*
 Title    Darstellung und Eigenschaften von Bis(phthalocyaninato)lanthanaten und -ceraten Preparation and Properties o f Bis(phthalocyaninato)lanthanates and -cerates  
 Abstract    High yields of bisphthalocyaninates of lanthanum and cerium have been obtained in the strongly exothermic reaction of the dehydrated lanthanoid acetates with molten 1,2-di-cyanobenzene in the presence of potassium hydroxide or methylate. Salts of the type (cat)[M(Pc(2-))-,] (M = La, Ce) with different cations (cat+ = K. Bu4N, PNP. TDOA) have been isolated. The corresponding "Hydrogen salts" are obtained by thermal decomposition of (Bu4N)[M(Pc(2-))-,] at T > 350 C. The dimeric structure is confirmed by negative fast atom bombardement mass spectra. The redox properties have been investigated by cyclovoltam-metry and UV, VIS, MIR, FIR and resonance Raman (RR) spectra are reported. Electronic transitions between 2000 and 3000 cm 1 are observed in the low temperature RR spectra of (Bu4N)[Ce(Pc(2-))^] being RR enhanced at 470 nm. From the assignment to the higher transi­ tions within the symmetry split 5F5/2, :F7 manifolds of the f1 ground state of Ce3+ the crystal field parameters f4f = 610.5, B40 = 242.2 and B60 = 4.1 cm-1 have been determined. 
  Reference    Z. Naturforsch. 46b, 1641—1649 (1991); eingegangen am 18. Juni 1991 
  Published    1991 
  Keywords    Bis(phthalocyaninato)lanthanates Bis(phthalocyaninato)cerates, Vibrational Spectra, UV-VIS Spectra, Electronic Raman Spectra 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1641.pdf 
 Identifier    ZNB-1991-46b-1641 
 Volume    46 
11Author    Ramesh Kapoor, Pratibha Kapoor, Ramneek SharmaRequires cookie*
 Title    Reactions of Chromyl Chloride with Carboxylic Acids and Carboxylic Acid Anhydrides  
 Abstract    Chromyl Chloride reacts with carboxylic acids [RCOOH where R — C2H5, AZ-C3H7, CH2CI, CHC1 2 and CCI3] to give reduced chromium(III) carboxylates, [Cr 3 0(00CR) 6 (H 2 0) 3 ]Cl. Magne-tic susceptibility, UV-visible and IR measurements are all consistent with their trinuclear basic structures. Reactions of chromyl chloride with carboxylic acid anhydrides [(RCO) z O where R = CH 3 , C 2 H 5 and «-C 3 H 7 ] give dinuclear oxo-bridged complexes of the type, [Cr 2 0(00CR) 3 ]Cl. These compounds behave as non-electrolytes in polar organic solvents. IR spectra suggest the presence of bridging carboxylato groups containing Cr—O — Cr chains. Their low magnetic mo-ment values suggest polymeric structures exhibiting antiferromagnetic coupling between Cr atoms. 
  Reference    Z. Naturforsch. 40b, 247—250 (1985); received October 17 1984 
  Published    1985 
  Keywords    Chromyl Chloride, Trinuclear Basic Chromium(III) Carboxylate, Dinuclear Oxochromium(III) Carboxylate, Magnetic Susceptibility, IR Spectra, UV-Vis Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0247.pdf 
 Identifier    ZNB-1985-40b-0247 
 Volume    40 
12Author    Z. NaturforschRequires cookie*
 Title    Elektronentransfer und Ionenpaar-Bildung  
 Abstract    , 47 [1] Titrationen von 1,2,4,5-Tetracyanbenzol und 7,7,8,8-Tetracyan-/;-chino-dimethan mit Natriummetall in aprotischen Lösungen E le ctro n T ran sfer an d Ion P air F o rm atio n , 47 [ 1 ] T itratio n s o f 1,2 ,4 ,5 -T etracy an o b en zen e and 7 ,7 ,8 ,8 -T etracy an o -/?-q u in o d im eth an e w ith S o d iu m M etal in A p ro tic S o lu tio n s H an s B ock*, M a rk u s K leine 
  Reference    Z. Naturforsch. 51b, 1215—1221 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    1, 2, 4, 5-Tetracyanobenzene, 7, 7, 8, 8-Tetracyano-/?-quinodimethane, Sodium Metal Reduction, UV/VIS Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1215.pdf 
 Identifier    ZNB-1996-51b-1215 
 Volume    51