A bridged di-iron porphyrin hyponitrite complex as a model for biological N2O production from hyponitrite

Nan Xu; Erwin G. Abucayon; Douglas R. Powell; George B. Richter-Addo

doi:10.1016/j.niox.2015.10.005

A bridged di-iron porphyrin hyponitrite complex as a model for biological N₂O production from hyponitrite

Nan Xu, Erwin G. Abucayon, Douglas R. Powell, George B. Richter-Addo

Division of Mathematics & Natural Sciences (Altoona)

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Heme-hyponitrites are intermediates that form at the bimetallic active sites of bacterial nitric oxide reductases. To probe a possible effect of the Fe-Fe distance on hyponitrite stability, we prepared a bridged bis-porphyrin Fe-hyponitrite compound, namely [(OEP-CH₂)Fe]₂(μ₂,η¹,η¹-ONNO). Its υ_NO of 992 cm^-1 (υ_15NO of 976 cm^-1) is close to the υ_NO of 983 cm^-1 reported previously by us for the crystallographically characterized [(OEP)Fe]₂(μ₂,η¹,η¹-ONNO) compound. The bridged bis-porphyrin Fe-hyponitrite complex is unstable with respect to N₂O production, supporting the role of the bis-Fe porphyrin system in hyponitrite conversion to N₂O. The preparation and crystallographic determination of the bridging sulfato derivative is also reported.

Original language	English (US)
Pages (from-to)	16-20
Number of pages	5
Journal	Nitric Oxide - Biology and Chemistry
Volume	52
DOIs	https://doi.org/10.1016/j.niox.2015.10.005
State	Published - Jan 30 2016

All Science Journal Classification (ASJC) codes

Biochemistry
Physiology
Clinical Biochemistry
Cancer Research

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10.1016/j.niox.2015.10.005

Cite this

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title = "A bridged di-iron porphyrin hyponitrite complex as a model for biological N2O production from hyponitrite",

abstract = "Heme-hyponitrites are intermediates that form at the bimetallic active sites of bacterial nitric oxide reductases. To probe a possible effect of the Fe-Fe distance on hyponitrite stability, we prepared a bridged bis-porphyrin Fe-hyponitrite compound, namely [(OEP-CH2)Fe]2(μ2,η1,η1-ONNO). Its υNO of 992 cm-1 (υ15NO of 976 cm-1) is close to the υNO of 983 cm-1 reported previously by us for the crystallographically characterized [(OEP)Fe]2(μ2,η1,η1-ONNO) compound. The bridged bis-porphyrin Fe-hyponitrite complex is unstable with respect to N2O production, supporting the role of the bis-Fe porphyrin system in hyponitrite conversion to N2O. The preparation and crystallographic determination of the bridging sulfato derivative is also reported.",

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AU - Xu, Nan

AU - Abucayon, Erwin G.

AU - Powell, Douglas R.

AU - Richter-Addo, George B.

PY - 2016/1/30

Y1 - 2016/1/30

N2 - Heme-hyponitrites are intermediates that form at the bimetallic active sites of bacterial nitric oxide reductases. To probe a possible effect of the Fe-Fe distance on hyponitrite stability, we prepared a bridged bis-porphyrin Fe-hyponitrite compound, namely [(OEP-CH2)Fe]2(μ2,η1,η1-ONNO). Its υNO of 992 cm-1 (υ15NO of 976 cm-1) is close to the υNO of 983 cm-1 reported previously by us for the crystallographically characterized [(OEP)Fe]2(μ2,η1,η1-ONNO) compound. The bridged bis-porphyrin Fe-hyponitrite complex is unstable with respect to N2O production, supporting the role of the bis-Fe porphyrin system in hyponitrite conversion to N2O. The preparation and crystallographic determination of the bridging sulfato derivative is also reported.

AB - Heme-hyponitrites are intermediates that form at the bimetallic active sites of bacterial nitric oxide reductases. To probe a possible effect of the Fe-Fe distance on hyponitrite stability, we prepared a bridged bis-porphyrin Fe-hyponitrite compound, namely [(OEP-CH2)Fe]2(μ2,η1,η1-ONNO). Its υNO of 992 cm-1 (υ15NO of 976 cm-1) is close to the υNO of 983 cm-1 reported previously by us for the crystallographically characterized [(OEP)Fe]2(μ2,η1,η1-ONNO) compound. The bridged bis-porphyrin Fe-hyponitrite complex is unstable with respect to N2O production, supporting the role of the bis-Fe porphyrin system in hyponitrite conversion to N2O. The preparation and crystallographic determination of the bridging sulfato derivative is also reported.

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