Synthesis, crystal structure, spectroscopic, and photoreactive properties of a ruthenium(II)-mononitrosyl complex

Tassé, Marine; Mohammed, Hasan Shamran; Sabourdy, Chloé; Mallet‐Ladeira, Sonia; Lacroix, Pascal G.; Malfant, Isabelle

doi:10.1016/j.poly.2016.09.010

Cited by 11 publications

(8 citation statements)

References 41 publications

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“…13,14,15,16,17,18 Among these systems, ruthenium nitrosyl complexes have attracted growing interest over the past two decades, not only owing to their photochromic properties but also because of their capability to photorelease nitric oxide. 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42 Despite extensive experimental investigations, the mechanism for these two competing processes remained unclear until recently. 43 Computational studies investigating the linkage photoisomerization mechanisms of metal complexes remain relatively scarce owing to the difficulty to compute the excited-state potential energy landscape in such systems.…”

Section: Introductionmentioning

confidence: 99%

Linkage Photoisomerization Mechanism in a Photochromic Ruthenium Nitrosyl Complex: New Insights from an MS-CASPT2 Study

Talotta

Heully

Alary

et al. 2017

J. Chem. Theory Comput.

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The N → O linkage photoisomerization mechanism in a ruthenium nitrosyl complex, [RuCl(NO)(py)], for which a quasicomplete photoconversion between the stable nitrosyl (N-bonded) and metastable isonitrosyl (O-bonded) isomers has been observed under continuous irradiation of the crystal at 473 nm ( Cormary et al. Acta Cryst. B 2009 , 65 , 612 - 623 ), is investigated using multiconfigurational second-order perturbation theory (CASPT2). The results support efficient intersystem crossing pathways from the initially excited singlet states to the lowest triplet excited state of metal-to-ligand charge transfer character (MLCT). The topology of the involved potential energy surfaces corroborates a complex sequential two-photon photoisomerization mechanism involving nonadiabatic processes in agreement with experimental observations and previous density functional theory calculations.

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Section: Introductionmentioning

confidence: 99%

Linkage Photoisomerization Mechanism in a Photochromic Ruthenium Nitrosyl Complex: New Insights from an MS-CASPT2 Study

Talotta

Heully

Alary

et al. 2017

J. Chem. Theory Comput.

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“…In our case, the complexes did not show photoisomerization behavior which means that the CPAT dye is bonded to the metal within complex structure. It is nice to point that the cis isomer backed totally at room temperature to trans isomer which means that the chromic behavior is intrinsic [27][28][29][30][31][32].…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Identification, and Biological Study for Some Complexes of Azo Dye Having Theophylline

Mohammed

2021

The Scientific World Journal

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This article includes the synthesis of heterocyclic azo dye of theophylline by coupling diazonium salt of 4-chloroaniline with theophylline which is, namely, 8-(1-(4-chlorophenyl)azo)theophylline (CPAT). The complexes of cobalt and nickel were prepared by reacting their ions with CPAT ligand in ethanol under 1 : 2 ratio metal-ligand. The CPAT ligand and its complexes were characterized by elemental analysis, infrared spectrometry, electronic absorption spectroscopy, molar conductivity, and magnetic moment. The cobalt and nickel complexes show octahedral geometry having general formula [M(CPAT)2Cl2]. This article addresses the properties of CPAT dye such as photochromic properties. The CPAT dye exhibited obvious and desired changes under irradiation with visible light (405 nm), high sensitive for pH changes which refer to its ability to be analysis indicator. CPAT dye exhibited solvatochromic properties presenting red shift with polar solvent. The CPAT and its complexes show interesting antibiological activities towards Staph. aureus and E. coli bacteria and Aspergillus fungi.

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“…The Ru II atom of the trans-[Ru(C 6 H 7 N) 4 Cl(NO)] 2+ cation features a compressed octahedral coordination sphere with the four N atoms of the 4-picoline ligands in the equatorial positions, and chlorido data reports and nitrosyl ligands located at the trans axial sites. The N1 O1 bond length is 1.140 (5) Å , which is in the range of N O groups in other examples of octahedral Ru II -NO + complexes, but shorter than the N O bond of trans-[Ru(py) 4 (Cl)(NO)](PF 6 ) 2 which is 1.146 (2) Å (Cormary et al, 2009a,b), and longer than the N O bond of trans-[Ru(4-Clpy) 4 (Cl)(NO)](PF 6 ) 2 (Tassé et al, 2016), which is 1.125 (5) Å . These differences are due to the substituents (electron donating or withdrawing) on the pyridine ligands.…”

Section: Structure Descriptionmentioning

confidence: 99%

trans-Chloridotetrakis(4-methylpyridine-κN)(nitrosyl-κN)ruthenium(II) bis(hexafluoridophosphate) acetone 0.75-solvate

Mohammed¹,

Mallet‐Ladeira²,

Cormary³

et al. 2017

IUCr Data

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The title compound, [RuCl(NO)(C6H7N)4](PF6)2·0.75(CH3)2CO, comprises four ligands of 4-picoline in equatorial position around the central atom. Overall, the complex features an octahedral coordination environment around the central RuIIatom, with the chlorido ligandtransto the nitrosyl. The bond length of the nitrosyl N=O ligand is 1.140 (5) Å, while the angle Ru—N=O is 179.0 (4)°. The asymmetric unit contains four PF6−counter-anions, two with occupancy of 0.25 and one with occupancy of 0.5. One PF6−anion is disordered over two sets of sites and one other is disordered with an acetone molecule that occupies the same site.

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Synthesis, crystal structure, spectroscopic, and photoreactive properties of a ruthenium(II)-mononitrosyl complex

Cited by 11 publications

References 41 publications

Linkage Photoisomerization Mechanism in a Photochromic Ruthenium Nitrosyl Complex: New Insights from an MS-CASPT2 Study

Linkage Photoisomerization Mechanism in a Photochromic Ruthenium Nitrosyl Complex: New Insights from an MS-CASPT2 Study

Synthesis, Identification, and Biological Study for Some Complexes of Azo Dye Having Theophylline

trans-Chloridotetrakis(4-methylpyridine-κN)(nitrosyl-κN)ruthenium(II) bis(hexafluoridophosphate) acetone 0.75-solvate

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