Publications

Wolfgang Kaim, and Walter. Matheis. Bis(1,4-di-tert-butyl-1,4-diazabutadiene)gallium is not a gallium(II) compound. Journal of the Chemical Society, Chemical Communications, 8:597--598, 1991. [PUMA: ESR complex complex;gallium complex;hyperfine complex;valence coupling ditertbutyldiazabutadiene ditertibutyldiazabutadiene gallium valence]

Sandeep Ghumaan, Biprajit Sarkar, Somnath Maji, Vedavati G. Puranik, Jan Fiedler, Francisco A. Urbanos, Reyes Jimenez-Aparicio, Wolfgang Kaim, and Goutam Kumar. Lahiri. Valence-state analysis through spectroelectrochemistry in a series of quinonoid-bridged diruthenium complexes (acac)2Ru(m-L)Ru(acac)2n (n = +2, +1, 0, -1, -2). Chemistry - A European Journal, (14)34:10816--10828, 2008. [PUMA: bridge complex diruthenium quinonoid spectroelectrochem state valence]

Mixed-valence intermediates as ideal targets for spectroelectrochemistry (SEC): Spectroelectrochem. In Wolfgang Kaim, Biprajit Sarkar, and Goutam Kumar. Lahiri (Eds.), Royal Society of Chemistry, 2008. [PUMA: ESR IR catalysis electrocatalysis intermediate mixed optical redox review;review spectroelectrochem valence vibrational]

Renate Gross, and Wolfgang. Kaim. Neutral spin-delocalized mixed-valence manganese(I)-manganese(II) dimers bridged by alkoxide, imidazolate, or malonodinitrile anions. Inorganic Chemistry, (25)27:4865--4870, 1986. [PUMA: alkoxide anion complex complex;ESR complex;intervalence complex;malononitrile complex;manganese dimeric manganese mixed transition valence valence;imidazolate]

W. Kaim. Complexes with 2,2'-azobis(pyridine) and related 'S-frame' bridging ligands containing the azo function. Coordination Chemistry Reviews, (219-221):463--488, 2001. [PUMA: azobispyridine charge complex complex;structure intermediate metal review review;isomerism review;mixed review;oxidn review;radical review;review state transfer valence]

Sanjib Kar, Biprajit Sarkar, Sandeep Ghumaan, Deepa Janardanan, Joris van Slageren, Jan Fiedler, Vedavati G. Puranik, Raghavan B. Sunoj, Wolfgang Kaim, and Goutam Kumar. Lahiri. 2,5-Dioxido-1,4-benzoquinonediimine (H2L2-), a hydrogen-bonding noninnocent bridging ligand related to aminated topaquinone: Different oxidation state distributions in complexes (bpy)2Ru2(m-H2L)n (n = 0 , +, 2+, 3+, 4+) and (acac)2Ru2(m-H2L)m (m = 2-, -, 0, +, 2+). Chemistry - A European Journal, (11)17:4901--4911, 2005. [PUMA: acac bond bridged bridging charge complex complex;crystal complex;electrochem complex;hydrogen complex;mixed complex;ruthenium dinuclear dioxidobenzoquinonediimine electrochem ligand prepn redox ruthenium structure transfer valence]

Michael Ketterle, Wolfgang Kaim, Jose A. Olabe, Alejandro R. Parise, and Jan. Fiedler. Widely differing stabilities of molecule-bridged cyanodiiron(III,II) species in non-aqueous solvents. Inorganica Chimica Acta, (291)1-2:66--73, 1999. [PUMA: ESR IR UV bipyridine comproportionation const;mixed cyano electrochem iron prepn pyrazine pyridylethene pyrimidyltetrazine pyrimidyltetrazine;iron pyrimidyltetrazine;pyrazine redox redox;electrochem redox;pyridylethene redox;pyrimidyltetrazine valence]

Wolfgang Kaim, and Biprajit. Sarkar. Mixed valency in ruthenium complexes - Coordinative aspects. Coordination Chemistry Reviews, (251)3+4:584--594, 2007. [PUMA: complex interaction metal mixed review ruthenium valence]

Martina Heilmann, Stephanie Frantz, Wolfgang Kaim, Jan Fiedler, and Carole. Duboc. Mixed-valent and radical states of complexes (bpy)2M(m-abpy)M'(bpy)2n+, M,M' = Ru or Os, abpy = 2,2'-azobispyridine: Electron transfer vs. hole transfer mechanism in azo ligand-bridged complexes. Inorganica Chimica Acta, (359)3:821--829, 2006. [PUMA: EPR azobispyridine bridge complex complex;electron complex;hole complex;mixed cyclic electrochem heterobinuclear;osmium homobinuclear osmium prepn redox ruthenium spectroelectrochem;radical transfer valence voltammetry]

Shengfa Ye, Biprajit Sarkar, Mark Niemeyer, and Wolfgang. Kaim. Mixed-ligand copper complexes with 8-methylthioquinoline and triphenylphosphane or the o-semiquinone/catecholate redox system. European Journal of Inorganic Chemistry, 23:4735--4738, 2005. [PUMA: ESR;crystal complex complex;ESR copper methylthioquinoline phosphine prepn semiquinone structure tautomer valence]

Frank Baumann, Wolfgang Kaim, Gert Denninger, Hans-Juergen Kuemmerer, and Jan. Fiedler. Widely Separated Reduction Processes of abpy-Coupled Areneosmium(II) Reaction Centers (abpy = 2,2'-Azobispyridine): Stabilization of the Radical Intermediate and of the Os0OsII State. Organometallics, (24)8:1966--1973, 2005. [PUMA: EPR arene azobispyridine binuclear bipyrimidine bridged cation complex complex;osmium diosmium mixed osmium potential;radical redox spectra valence]

Tanaya Kundu, David Schweinfurth, Biprajit Sarkar, Tapan Kumar Mondal, Jan Fiedler, Shaikh M. Mobin, Vedavati G. Puranik, Wolfgang Kaim, and Goutam Kumar. Lahiri. Strong metal-metal coupling in mixed-valent intermediates Cl(L)Ru(m-tppz)Ru(L)Cl+, L = b-diketonato ligands, tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine. Dalton Transactions, (41)43:13429--13440, 2012. [PUMA: DFT;optimized MO MO;dinuclear acetylacetonate acetylacetonato crystal diketonate dinuclear electrochem mixed mol prepn pyridylpyrazine redox ruthenium structure valence]

Nripen Chanda, Biprajit Sarkar, Jan Fiedler, Wolfgang Kaim, and Goutam Kumar. Lahiri. Synthesis and mixed valence aspects of (L)ClRu2(m-tppz)n+ incorporating 2,2'-dipyridylamine (L) as ancillary and 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) as bridging ligand. Dalton Transactions, 18:3550--3555, 2003. [PUMA: complex complex;electrochem complex;luminescence complex;mixed complex;ruthenium comproportionation const dinuclear dipyridylamine mononuclear polypyridylpyrazine prepn ruthenium valence]

Infrared spectroelectrochemical investigations of ultrafast electron transfer in mixed-valence complexes: Spectroelectrochem. In J. Catherine Salsman, and Clifford P. Kubiak (Eds.), Royal Society of Chemistry, 2008. [PUMA: IR cell design;ultrafast electron mixed reflectance review spectroelectrochem transfer valence]

Stanislav Zalis, and Wolfgang. Kaim. Electronic structures of two kinds of oligoborane radical anions: Mixed-valence description of a reduced p-phenylenediborane and spin density distributions in distorted octahedral clusters B6Hal6.-, Hal = Cl, Br, I. Main Group Chemistry, (5)4:267--276, 2006. [PUMA: anion anion;mixed boron cluster density distribution electronic halide octahedral oligoborane phenylenediborane radical structure structure;spin valence] URL

Synthetic and spectroscopic approaches to the copper/quinone-coupled center in amine oxidases: Bioinorg. Chem. In Jochen Rall, Eberhard Waldhor, Brigitte Schwederski, Manuela Schwach, Stephan Kohlmann, and Wolfgang. Kaim (Eds.), Wiley-VCH Verlag GmbH, 1997. [PUMA: amine benzoquinone copper methylthiomethylbenzimidazole methylthiomethylbenzimidazole;copper model oxidase prepn quinone tautomerism;review valence]

Wolfgang Kaim, Wolfgang Bruns, Juergen Poppe, and Volker. Kasack. Spectroscopy of mixed valent states in dinuclear ions and metalloproteins. Journal of Molecular Structure, (292):221--228, 1993. [PUMA: ESR IR complex complex;UV mixed review review;metalloprotein review;review spectroscopy valence]

Sandeep Ghumaan, Biprajit Sarkar, Srikanta Patra, Kumar Parimal, Joris van Slageren, Jan Fiedler, Wolfgang Kaim, and Goutam Kumar. Lahiri. 3,6-Bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L - H+)- as ligands for (acac)2Run+ or (bpy)2Rum+: Investigation of mixed valency in (acac)2Ru2(m-L - H+)0 and (bpy)2Ru2(m-L - H+)4+ by spectroelectrochemistry and EPR. Dalton Transactions, 4:706--712, 2005. [PUMA: acac bipyridine bispyridylpyridazine bispyridylpyridazine;electrochem crystal cyclometalated cyclometalated;EPR cyclometalated;mixed cyclometalated;spectroelectrochem redox ruthenium structure valence]

Sandeep Ghumaan, Biprajit Sarkar, Mahendra P. Patil, Jan Fiedler, Raghavan B. Sunoj, Wolfgang Kaim, and Goutam Kumar. Lahiri. Multiple one-electron oxidation and reduction of trinuclear bis(2,4-pentanedionato)ruthenium complexes with substituted diquinoxalino2,3-a:2',3'-cphenazine ligands. Polyhedron, (26)13:3409--3418, 2007. [PUMA: DFT MO acac diquinoxalinophenazine electrochem frontier mixed prepn redox;spectroelectrochem ruthenium substituted trinuclear trinuclear;EPR trinuclear;mixed trinuclear;ruthenium valence]

Doyel Kumbhakar, Biprajit Sarkar, Somnath Maji, Shaikh M. Mobin, Jan Fiedler, Francisco A. Urbanos, Reyes Jimenez-Aparicio, Wolfgang Kaim, and Goutam Kumar. Lahiri. Intramolecular Valence and Spin Interaction in meso and rac Diastereomers of a p-Quinonoid-Bridged Diruthenium Complex. Journal of the American Chemical Society, (130)51:17575--17583, 2008. [PUMA: bridged crystal diastereoisomer diastereoisomer;electrochem diastereoisomer;magnetic diastereoisomer;quinonoid diruthenium interaction intramol prepn property quinonoid redox spin structure valence]