Ghumaan S - Search Results

1

Probing mixed valence in a new tppz-bridged diruthenium(III,II) complex {(mu-tppz)[Ru(bik)Cl]2}3+ (tppz=2,3,5,6-tetrakis(2-pyridyl)pyrazine, bik=2,2'-bis(1-methylimidazolyl)ketone): EPR silence, intervalence absorption, and nu(CO) line broadening.

Koley M, Sarkar B, Ghumaan S, Bulak E, Fiedler J, Kaim W, Lahiri GK. Koley M, et al. Among authors: ghumaan s. Inorg Chem. 2007 Apr 30;46(9):3736-42. doi: 10.1021/ic0700102. Epub 2007 Mar 28. Inorg Chem. 2007. PMID: 17388585

2

Isovalent and mixed-valent diruthenium complexes [(acac)2RuII (-bpytz)RuII(acac)2] and [(acac)2RuII(-bpytz)RuIII(acac)2](ClO4) (acac = acetylacetonate and bpytz = 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine): synthesis, spectroelectrochemical, and epr investigation.

Patra S, Sarkar B, Ghumaan S, Fiedler J, Kaim W, Lahiri GK. Patra S, et al. Among authors: ghumaan s. Inorg Chem. 2004 Sep 20;43(19):6108-13. doi: 10.1021/ic049346r. Inorg Chem. 2004. PMID: 15360263

3

Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) systems [(acac)2 Ru(mu-Q)Ru(acac)2](n), Q = 1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-).

Ghumaan S, Sarkar B, Patra S, van Slageren J, Fiedler J, Kaim W, Lahiri GK. Ghumaan S, et al. Inorg Chem. 2005 May 2;44(9):3210-4. doi: 10.1021/ic048309x. Inorg Chem. 2005. PMID: 15847429

4

A new coordination mode of the photometric reagent glyoxalbis(2-hydroxyanil) (H2gbha): bis-bidentate bridging by gbha2- in the redox series [(mu-gbha)[Ru(acac)2]2]n (n = -2, -1, 0, +1, +2), including a radical-bridged diruthenium(III) and a Ru(III)/Ru(IV) intermediate.

Kar S, Sarkar B, Ghumaan S, Roy D, Urbanos FA, Fiedler J, Sunoj RB, Jimenez-Aparicio R, Kaim W, Lahiri GK. Kar S, et al. Among authors: ghumaan s. Inorg Chem. 2005 Nov 28;44(24):8715-22. doi: 10.1021/ic050950r. Inorg Chem. 2005. PMID: 16296825

5

2,4,6-Tris(2-pyridyl)-1,3,5-triazine (tptz)-derived [Ru(II)(tptz)(acac)(CH3CN)]+ and mixed-valent [(acac)2Ru(III){(mu-tptz-H+)-}Ru(II)(acac)(CH3CN)]+.

Ghumaan S, Kar S, Mobin SM, Harish B, Puranik VG, Lahiri GK. Ghumaan S, et al. Inorg Chem. 2006 Mar 20;45(6):2413-23. doi: 10.1021/ic0514288. Inorg Chem. 2006. PMID: 16529460

6

2,2'-Dipyridylketone (dpk) as ancillary acceptor and reporter ligand in complexes [(dpk)(Cl)Ru(mu-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine.

Ghumaan S, Sarkar B, Chanda N, Sieger M, Fiedler J, Kaim W, Lahiri GK. Ghumaan S, et al. Inorg Chem. 2006 Sep 18;45(19):7955-61. doi: 10.1021/ic060887l. Inorg Chem. 2006. PMID: 16961390

7

Valence-state analysis through spectroelectrochemistry in a series of quinonoid-bridged diruthenium complexes [(acac)(2)Ru(mu-L)Ru(acac)(2)](n) (n=+2, +1, 0, -1, -2).

Ghumaan S, Sarkar B, Maji S, Puranik VG, Fiedler J, Urbanos FA, Jimenez-Aparicio R, Kaim W, Lahiri GK. Ghumaan S, et al. Chemistry. 2008;14(34):10816-28. doi: 10.1002/chem.200800976. Chemistry. 2008. PMID: 18924186

8

[(mu-L)[RuII(acac)2]2]n, n= 2+, +, 0, -, 2-, with L = 3,3',4,4'-tetraimino-3,3',4,4'-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediates.

Patra S, Sarkar B, Ghumaan S, Fiedler J, Zális S, Kaim W, Kumar Lahiri G. Patra S, et al. Among authors: ghumaan s. Dalton Trans. 2004 Mar 7;(5):750-3. doi: 10.1039/b315927m. Epub 2004 Feb 3. Dalton Trans. 2004. PMID: 15252495

9

The triruthenium complex [[(acac)2Ru(II)]3(L)] containing a conjugated diquinoxaline[2,3-a:2',3'-c]phenazine (L) bridge and acetylacetonate (acac) as ancillary ligands. Synthesis, spectroelectrochemical and EPR investigation.

Patra S, Sarkar B, Ghumaan S, Fiedler J, Kaim W, Lahiri GK. Patra S, et al. Among authors: ghumaan s. Dalton Trans. 2004 Mar 7;(5):754-8. doi: 10.1039/b316007f. Epub 2004 Jan 30. Dalton Trans. 2004. PMID: 15252496

10

3,6-bis(2'-pyridyl)pyridazine (L) and its deprotonated form (L - H+)- as ligands for {(acac)2Ru(n+)} or {(bpy)2Ru(m+)}: investigation of mixed valency in [{(acac)2Ru}2(mu-L - H+)]0 and [{(bpy)2Ru}2(mu-L - H+)]4+ by spectroelectrochemistry and EPR.

Ghumaan S, Sarkar B, Patra S, Parimal K, van Slageren J, Fiedler J, Kaim W, Lahiri GK. Ghumaan S, et al. Dalton Trans. 2005 Feb 21;(4):706-12. doi: 10.1039/b417530a. Epub 2005 Jan 17. Dalton Trans. 2005. PMID: 15702181

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