|
1
|
Shircliff AD, Allbritton EMA, Davilla DJ, Gorbet MJ, Jones DG, Tresp DS, Allen MB, Shrestha A, Burgess GE, Eze JI, Fernandez AT, Ramirez D, Shoff KJ, Crispin GG, Crone SB, Flinn M, Tran T, Bryce DS, Bond AL, Shockey DW, Oliver AG, Krause JA, Prior TJ, Hubin TJ. Expanding and quantifying the crystal chemistry of the flexible ligand 15aneN5. CrystEngComm 2022. [DOI: 10.1039/d1ce01534f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
15aneN5 is structurally characterized complexed to Cr3+, Mn3+, Fe3+, Co3+, and Cu2+ for the first time. Ru3+ complexation yields a Ru2+ diimine structure. A geometric factor quantifies the coordination geometry of the ligand in its complexes.
Collapse
Affiliation(s)
- Anthony D. Shircliff
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Elisabeth M. A. Allbritton
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Dustin J. Davilla
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Michael-Joseph Gorbet
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Donald G. Jones
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - David S. Tresp
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Michael B. Allen
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Alina Shrestha
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Gwendolyn E. Burgess
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - John I. Eze
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Andrea T. Fernandez
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Daniel Ramirez
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Kody J. Shoff
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Garet G. Crispin
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Sarah B. Crone
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Michael Flinn
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Tien Tran
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Darby S. Bryce
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Abbagale L. Bond
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Dylan W. Shockey
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | | | - Timothy J. Prior
- Department of Chemistry, University of Hull, Cottingham Road, Kingston Upon Hull, HU6 7RX, UK
| | - Timothy J. Hubin
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK, USA
| |
Collapse
|
|
5
|
Ning G, Inokuma Y, Fujita M. Dynamic Behavior of M
6
L
4
Capsules in Solution and Crystalline States. Chem Asian J 2013; 8:2596-9. [DOI: 10.1002/asia.201300758] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Guo‐Hong Ning
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo 7‐3‐1, Bunkyo‐ku, Tokyo 113‐8656 (Japan), Fax: (+81) 3‐5841‐7257
| | - Yasuhide Inokuma
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo 7‐3‐1, Bunkyo‐ku, Tokyo 113‐8656 (Japan), Fax: (+81) 3‐5841‐7257
| | - Makoto Fujita
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo 7‐3‐1, Bunkyo‐ku, Tokyo 113‐8656 (Japan), Fax: (+81) 3‐5841‐7257
| |
Collapse
|
|
8
|
Berben LA, Faia MC, Crawford NRM, Long JR. Angle-Dependent Electronic Effects in 4,4‘-Bipyridine-Bridged Ru3 Triangle and Ru4 Square Complexes. Inorg Chem 2006; 45:6378-86. [PMID: 16878949 DOI: 10.1021/ic060570l] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Use of 1,4,7,10-tetraazacyclododecane (cyclen) as a capping ligand and 4,4'-bipyridine (4,4'-bpy) as a bridging ligand enables assembly of redox-active Ru3 triangle and Ru4 square complexes. The former is produced by reacting [(cyclen)Ru(DMSO)Cl]Cl with 4,4'-bpy in a 3:1 ethanol:water mixture to precipitate [(cyclen)3Ru3(4,4'-bpy)3]Cl6.18H2O.THF (4), whereas the latter is generated as [(cyclen)4Ru4(4,4'-bpy)4](CF3SO3)8.2CF3SO3H.5MeOH (7) by reacting (cyclen)Ru(CF3SO3)3 with 4,4'-bpy in methanol. The crystal structure of 4.11H2O reveals an equilateral triangle in which the 4,4'-bpy bridges are bowed outward, such that the pyridine rings are all forced to be perpendicular to the Ru3 triangle. Consequently, adjacent pyridine rings are essentially coplanar, and the cyclic voltammogram of [(cyclen)3Ru3(4,4'-bpy)3]6+ in acetonitrile displays three distinct one-electron oxidation events. Cyclic voltammetry measurements reveal redox processes centered at E(1/2) = 0.207, 0.342, and 0.434 V versus Cp2Fe(0/+) that are assigned to 6+/7+, 7+/8+, and 8+/9+ couples of the [(cyclen)3Ru3(4,4'-bpy)3]n+ triangle, respectively. In contrast, the structure of [(cyclen)4Ru4(4,4'-bpy)4]8+ features a regular square geometry wherein the rings of the bridging 4,4'-bpy ligands are free to rotate, leading to just one four-electron oxidation couple centered at 0.430 V. Density functional theory calculations performed on [(cyclen)3Ru3(4,4'-bpy)(3)]6+ reveal metal-based orbitals with contributions from the pi system of the bridging 4,4'-bpy ligands, providing a likely pathway for electron transfer.
Collapse
Affiliation(s)
- Louise A Berben
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | | | | | | |
Collapse
|
|
9
|
Sauaia MG, de Lima RG, Tedesco AC, da Silva RS. Nitric Oxide Production by Visible Light Irradiation of Aqueous Solution of Nitrosyl Ruthenium Complexes. Inorg Chem 2005; 44:9946-51. [PMID: 16363866 DOI: 10.1021/ic051346j] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Ru(II)L(NH(3))(4)(pz)Ru(II)(bpy)(2)(NO)](PF(6))(5) (L is NH(3), py, or 4-acpy) was prepared with good yields in a straightforward way by mixing an equimolar ratio of cis-[Ru(NO(2))(bpy)(2)(NO)](PF(6))(2), sodium azide (NaN(3)), and trans-[RuL(NH(3))(4)(pz)] (PF(6))(2) in acetone. These binuclear compounds display nu(NO) at ca. 1945 cm(-)(1), indicating that the nitrosyl group exhibits a sufficiently high degree of nitrosonium ion (NO(+)). The electronic spectrum of the [Ru(II)L(NH(3))(4)(pz)Ru(II)(bpy)(2)(NO)](5+) complex in aqueous solution displays the bands in the ultraviolet and visible regions typical of intraligand and metal-to-ligand charge transfers, respectively. Cyclic voltammograms of the binuclear complexes in acetonitrile give evidence of three one-electron redox processes consisting of one oxidation due to the Ru(2+/3+) redox couple and two reductions concerning the nitrosyl ligand. Flash photolysis of the [Ru(II)L(NH(3))(4)(pz)Ru(II)(bpy)(2)(NO)](5+) complex is capable of releasing nitric oxide (NO) upon irradiation at 355 and 532 nm. NO production was detected and quantified by an amperometric technique with a selective electrode (NOmeter). The irradiation at 532 nm leads to NO release as a consequence of a photoinduced electron transfer. All species exhibit similar photochemical behavior, a feature that makes their study extremely important for their future application in the upgrade of photodynamic therapy in living organisms.
Collapse
Affiliation(s)
- Marília Gama Sauaia
- Departamento de Química da Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. dos Bandeirantes 3900, 14040-901, Ribeirão Preto, São Paulo, Brazil
| | | | | | | |
Collapse
|
|
10
|
Ferreira KQ, Cardoso LN, Nikolaou S, da Rocha ZN, da Silva RS, Tfouni E. Solvent Dependent Conformational Isomerism and Ligand Oxidation of Novel Ru(II) Cyclen Complexes. Inorg Chem 2005; 44:5544-6. [PMID: 16060599 DOI: 10.1021/ic050006v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of cis-[Ru(II)(cyclen)(L)(x)](n+) (cyclen = 1,4,7,10-tetraazacyclododecane and L = 2,2'-bipyridine (bpy), phenanthroline (phen) or 4-cyanopyridinium (4-NCpyH(+))) is reported. The freshly prepared complexes are stable in aprotic solvents and cyclen undergoes oxidative dehydrogenation reaction at high pH. These compounds also present solvent dependent conformational isomerization.
Collapse
Affiliation(s)
- Kleber Q Ferreira
- Departamento de Química da Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Brazil
| | | | | | | | | | | |
Collapse
|