1952
DOI: 10.1063/1.1700710
|View full text |Cite
|
Sign up to set email alerts
|

Photochemistry of Ferrous Ions in Aqueous Solution

Abstract: The photochemistry of ferrous ions in aqueous solutions has been investigated, and it has been confirmed that irradiation in the quartz ultraviolet, in the absence of oxygen, leads to the formation of ferric salt and molecular hydrogen. It has been concluded further that the primary absorption of a light quantum results in the formation of excited ions, (Fe2+·H2O)*, a considerable proportion of which undergo processes of deactivation, while the remaining (about one-tenth) dissociate according to (Fe2+·H2O)*→Fe… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

0
5
0

Year Published

1958
1958
2021
2021

Publication Types

Select...
8

Relationship

0
8

Authors

Journals

citations
Cited by 19 publications
(5 citation statements)
references
References 10 publications
0
5
0
Order By: Relevance
“…39-42 It has been shown that irradiation of iron(II) solutions with UV light leads to the formation of iron(III) and molecular hydrogen in the absence of dissolved oxygen. 39 Remarkably, this reaction is photosensitized by the product iron(III). 42 However, direct photo-oxidation of iron(II) has negligible contribution to the overall process under the conditions applied here because the number of photons absorbed by iron(II) is about 5-6 orders of magnitude lower than the number of photons absorbed by sulfur(IV).…”
Section: The Iron(ii)-sulfur(iv)-oxygen Systemmentioning
confidence: 99%
See 1 more Smart Citation
“…39-42 It has been shown that irradiation of iron(II) solutions with UV light leads to the formation of iron(III) and molecular hydrogen in the absence of dissolved oxygen. 39 Remarkably, this reaction is photosensitized by the product iron(III). 42 However, direct photo-oxidation of iron(II) has negligible contribution to the overall process under the conditions applied here because the number of photons absorbed by iron(II) is about 5-6 orders of magnitude lower than the number of photons absorbed by sulfur(IV).…”
Section: The Iron(ii)-sulfur(iv)-oxygen Systemmentioning
confidence: 99%
“…These steps cannot be measured experimentally because they follow the rate controlling step, which is the formation of *H 2 O•SO 2 (in other words, neither *H 2 O•SO 2 nor *Fe(II) accumulates in the system during the process). The simplest assumption, which was also used in previous studies, [39][40][41][42] is that these are elementary reactions which are first order with respect to both reagents with second order rate constants k 4 and k 7 . Based on these assumptions, steadystate derivation 49 (see ESI †) can be used to show that quantities r and x depend on the iron(II) concentration at constant initial concentration of oxygen and sulfur(IV) as given in the following equations:…”
Section: Suggested Mechanismmentioning
confidence: 99%
“…[16] In a subsequent publication Rigg and Weiss elaborated on this work that involved the photochemistry of ferrous ions in acidic medium. [17] Their well-thought-out experimental work and argumentative discussion led to the conclusion that it was the molecular hydrogen ion (H 2 + ), formed during the UV-irradiation of an acidic solution of ferrous ions, that caused the oxidation of ferrous ions to ferric ions with the subsequent release of hydrogen gas. In an effort to consolidate a substantial research effort by different researchers, Rigg et al investigated the action of radiation (in the form of X-rays) on water and its effect on aqueous ferric and ferrous salts.…”
Section: Introductionmentioning
confidence: 99%
“…Figure 5. Calculated 52 photoionization spectrum compared to the observed79 absorption spectrum for aqueous Fe(II). The theoretical spectrum is that predicted for the photoionization of an electron from the complex to preexisting cavities in the water structure.…”
mentioning
confidence: 99%