Full Text Journal Articles by
Author Garik G Martirosyan

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Nitric Oxide Dioxygenation by O2 Adducts of Manganese Porphyrins.

Tigran S Kurtikyan, Vardan A Hayrapetyan, Astghik A Hovhannisyan, Garik G Martirosyan, Gohar Sh Hovhannisyan, Alexei V Iretskii, Peter C Ford,

We describe here nitric oxide dioxygenation (NOD) by the dioxygen manganese porphyrin adducts Mn(Por)(η<sup>2</sup>-O<sub>2</sub>) (Por<sup>2-</sup> = the <i>meso</i>-tetra-phenyl or <i>meso</i>-tetra-<i>p</i>-tolylporphyrinato dianions, TPP<sup>2-</sup> and TTP<sup>2-</sup>). The Mn(Por)(η<sup>2</sup>-O<sub>2</sub>) was assembled by adding O<sub>2</sub> to sublimed layers of Mn<sup>II</sup>(Por). When NO was introduced and the temperature was slowly raised from 80 to 120 ... Read more >>

Inorg Chem (Inorganic chemistry)
[2020, 59(23):17224-17233]

Cited: 0 times

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Tracking reactive intermediates by FTIR monitoring of reactions in low-temperature sublimed solids: nitric oxide disproportionation mediated by ruthenium(II) carbonyl porphyrin Ru(TPP)(CO).

Arsen S Azizyan, Tigran S Kurtikyan, Garik G Martirosyan, Peter C Ford,

Interaction of NO ((15)NO) with amorphous layers of Ru(II) carbonyl porphyrin (Ru(TPP)(CO), TPP(2-) = meso-tetraphenylporphyrinato dianion) was monitored by FTIR spectroscopy from 80 K to room temperature. An intermediate spectrally characterized at very low temperatures (110 K) with ν(CO) at 2001 cm(-1) and ν(NO) at 1810 cm(-1) (1777 cm(-1) for ... Read more >>

Inorg Chem (Inorganic chemistry)
[2013, 52(9):5201-5205]

Cited: 1 time

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Nitrosyl isomerism in amorphous Mn(TPP)(NO) solids.

Tigran S Kurtikyan, Vardan A Hayrapetyan, Garik G Martirosyan, Robert K Ghazaryan, Alexei V Iretskii, Hailiang Zhao, Kristine Pierloot, Peter C Ford,

Reaction of NO with amorphous Mn(TPP) layers gives two Mn(TPP)(NO) isomers with linear and bent Mn-N-O geometries that reversibly interconvert with changes in temperature. DFT computations predict that the linear complex is the singlet ground state while the bent structure is a triplet state. ... Read more >>

Chem Commun (Camb) (Chemical communications (Cambridge, England))
[2012, 48(99):12088-12090]

Cited: 3 times

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Nitric oxide dioxygenation reaction by oxy-coboglobin models: in-situ low-temperature FTIR characterization of coordinated peroxynitrite.

Tigran S Kurtikyan, Shahane R Eksuzyan, Vardan A Hayrapetyan, Garik G Martirosyan, Gohar S Hovhannisyan, John A Goodwin,

The oxy-cobolglobin models of the general formula (NH(3))Co(Por)(O(2)) (Por = meso-tetra-phenyl and meso-tetra-p-tolylporphyrinato dianions) were constructed by sequential low temperature interaction of NH(3) and dioxygen with microporous layers of Co-porphyrins. At cryogenic temperatures small increments of NO were introduced into the cryostat and the following reactions were monitored by the ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2012, 134(33):13861-13870]

Cited: 13 times

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In situ FT-IR and UV-vis spectroscopy of the low-temperature NO disproportionation mediated by solid state manganese(II) porphyrinates.

Garik G Martirosyan, Arsen S Azizyan, Tigran S Kurtikyan, Peter C Ford,

The heterogeneous reaction between NO gas and sublimed layers of manganese(II) porphyrinato complexes Mn(Por) (Por = TPP (tetraphenylporphyrinato dianion), TMP (tetramesitylporphyrinato dianion), or TPP(d20) (perdeuterated tetraphenylporphyrinato dianion)) has been monitored by IR and optical spectroscopy over the temperature range of 77 K to room temperature. These manganese porphyrins promote NO ... Read more >>

Inorg Chem (Inorganic chemistry)
[2006, 45(10):4079-4087]

Cited: 4 times

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Reactions of nitrogen oxides with heme models. Spectral and kinetic study of nitric oxide reactions with solid and solute Fe(III)(TPP)(NO3).

Tigran S Kurtikyan, Gurgen M Gulyan, Garik G Martirosyan, Mark D Lim, Peter C Ford,

The reaction(s) of nitric oxide (nitrogen monoxide) gas with sublimed layers containing the nitrato iron(III) complex Fe(III)(TPP)(eta(2)-O(2)NO) (1, TPP = meso-tetraphenyl porphyrinate(2)(-)) leads to formation of several iron porphyrin species that are ligated by various nitrogen oxides. The eventual products of these low-temperature solid-state reactions are the nitrosyl complex Fe(TPP)(NO), ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2005, 127(17):6216-6224]

Cited: 4 times

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Low temperature NO disproportionation by Mn porphyrin. Spectroscopic characterization of the unstable nitrosyl nitrito complex MnIII(TPP)(NO)(ONO).

Garik G Martirosyan, Arsen S Azizyan, Tigran S Kurtikyan, Peter C Ford,

Reaction of NO gas with sublimed layers of the Mn(II)TPP (TPP =meso-tetraphenylporphyrinato2-) at low temperature leads to nitric oxide disproportionation. UV-Vis and FTIR spectroscopy with isotopically substituted nitrogen oxides revealed formation of the unstable species identified as trans-Mn(III)(TPP)(NO)(ONO). ... Read more >>

Chem Commun (Camb) (Chemical communications (Cambridge, England))
[2004, (13):1488-1489]

Cited: 3 times

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Comparative IR study of nitric oxide reactions with sublimed layers of iron(II)- and ruthenium(II)-meso-tetraphenylporphyrinates.

Tigran S Kurtikyan, Garik G Martirosyan, Ivan M Lorkovic', Peter C Ford,

The interactions of nitric oxide gas with thin layers of Fe(II)(TPP) and Ru(II)(TPP), obtained by sublimation onto low-temperature substrate (77 K), has been investigated by means of IR spectroscopy (TPP = meso-tetraphenylporphyrinate). Only simple addition of NO to form Fe(TPP)(NO) is observed for the iron-porphyrin Fe(II)(TPP), while, in contrast, Ru(II)(TPP) ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2002, 124(34):10124-10129]

Cited: 7 times

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