Talk:Photochemistry

Industry

Added information on application of Photochemistry in industry (i.e. Chevron Phillips). For full disclosure I am an employee of the company, but do not speak for the company. I am also a novice Wiki editor, so apologies in advance. --Dwdockter 12:46, 5 October 2007 (UTC)

. References to energy required to initiate a reaction amended to "activation energy", minor gramattical changes. JohnT 13:14, 28 December 2005 (UTC)

Tyndall Effect

Is the Tyndall Effect studied too in this science? If so, perhaps it could be added to the article.200.71.186.241 01:04, 12 September 2007 (UTC)

The Tyndall effect is associated with aggregates of molecules so I would consider it a part of physical chemistry but not photochemistry V8rik 20:04, 12 September 2007 (UTC)

Organization

Notes to myself on what I think could be organized

• Famous scientists in the field of photochemistry
• Absorption
• Fluorescence
• Phosphoresence
• Quenching
• Equations???
• Optical Depth
• Anything we can "borrow" from physical chemistry ;)
• Machines that operate on some principals of photochemistry
• Molecular Orbitals

More later. Just notes for me, feel free to add/subtract and give me ideas, this will be a fun project to work on soon.

Jawz 02:08, 25 January 2006 (UTC)

I just added a bunch of moderately useful notes but my drunk self pressed some button and screwed it up. So, here's the brief outline - follow something like this:

1) Photochem - light/matter reaction 2) Photophysical processes - absorption (give equations) followed by the ways that molecules lose energy without chemically reacting 3) Photochemical processes - keep brief (this could go on and on - here, cover altered reactivity in excited state {ala pKa of excited state phenol}, classic reactions {norrish reactions}, isomerizations... 4) Time scales of interest to PChemists and why

I will not drunkenly hit the wrong button again, so...

Capthg 01:10, 13 October 2006 (EST)

You gave me a giggle. Perhaps don't edit whilst drunk though? :) Pursey 05:22, 14 October 2006 (UTC)

I think it would be nice to have some examples of photo-dimerization (anthracene dimerization) and photo-isomerization (azobenzene isomerization) to illustrate applications in applied photochemistry. The isomerization of the retinal chromophore in rhodospin is also a great example in living systems. --130.79.35.228 (talk) 14:50, 12 April 2010 (UTC)

Main concepts section

Would not the single sentence in this section, that has just be re-added, be best moved to be the second sentence of the lead? It seems out of place where it is? --Bduke (Discussion) 21:41, 1 January 2009 (UTC)

• Agreed! as long as the links are there. V8rik (talk) 21:37, 2 January 2009 (UTC)

Diagram misleading

An IP has removed the spectrum diagram with summary "Removed blatantly incorrect diagram (whose wrongness was amplified by the caption!)". The removal seems justified. I have explained (I hope) what seems to be wrong with the diagram Image:Spectre.svg at Talk:Terahertz radiation#Spectrum graph, where a related, derived, diagram (File:Spectre Terahertz.svg) was also removed. 84user (talk) 23:19, 27 May 2009 (UTC)

Merger proposal

The topics photochemistry and photochemical reaction are very, very similar, it seems to be. It is impossible to discuss photochemistry without talking about photochemical reactions, unless one simply talks about photoexcited states, absorption, or possibly relaxation etc. Comments welcome.--Smokefoot (talk) 23:41, 19 June 2010 (UTC)

Mechanistic Organic Photochemistry

I have started a discussion at Talk:Mechanistic Organic Photochemistry regarding that article's title and the way it is piped here. SpinningSpark 22:22, 6 April 2011 (UTC)

Carbon nanotubes

I think that this section really is not necessary because is not relevant and does not apport relevant information, and thus should be deleted. Comments?

Why exclude single-electron transfer?

@Smokefoot:

Recently you deleted the mention of redox via single-electron transfer with the comment rm fairly useless statement. Is it not true that some photochemical reactions can involve redox via single-electron transfer? I am not an expert, but if the statement is true and suffers merely from being too brief, then I would prefer to remedy the problem by adding a specific example reaction. Such a remedy would also improve a number of other examples in the article. Dirac66 (talk) 02:55, 14 December 2017 (UTC)

Incorrect santonin structures

The structures in the 'historical' section are incorrect. There should be gamma-lactones instead of cyclopentanone rings (O instead of CH2). FlowerFaerie087 (talk) 18:03, 3 June 2018 (UTC)

Yes, I see that the structure in the infobox of the santonin article has an O where this article has a CH₂. Unfortunately redrawing the whole diagram for the reaction sequence requires appropriate drawing software, such as ChemDraw perhaps. By clicking on the diagram and then on More details, I found that the original drawing was by V8rik in 2007. His User contributions page says he last edited English Wikipedia on 29 Dec 2017.

@V8rik: Can you redraw these diagrams with the correct lactone structures? Dirac66 (talk) 23:32, 4 June 2018 (UTC)