Talk:Femtochemistry

I have removed apparently copyright material that has been added by User_talk:145.94.41.95. It appears to have been lifted directly from the nobel prize site CustardJack 16:06, 17 May 2005 (UTC)[reply]

No, I copied it from a news website (they appreantly lifted it directly from the above site). I did that before getting enough exprience with WikiLaws, I won't do it again. The problem, of course, still remains, we need an good explination to this important theory, I hope you will help author one. --145.94.41.95 18:25, 19 May 2005 (UTC)[reply]

I have added the beginnings of an explanation, although it is still sadly lacking in detail. The method is in the public domain and the explanation has not been copied from any particular text so it should not violate copyright. I have not yet included references, but will update shortly. Madgenberyl 13:25, 8 October 2007 (UTC)[reply]

Reference Missing[edit]

"However, many argue that Dante Cervantes Coldpepper, Zewail's partner, should have been given the award." was added on march 19th with no reference.--212.46.40.198 (talk) 10:39, 25 March 2009 (UTC)[reply]

Merge with Femtosecond Spectroscopy[edit]

There is no field called "femtochemistry." Chemistry, eg chemical reactions, occurs on the picosecond timescale. Electronic dynamics (eg: the speed at which electrons rearrange around an atom after some perturbation is turned on) occur on the femtosecond timescale, but these processes are not easily or accurately probed using any direct observational technique (due to uncertainty in both time/energy and position/momentum). Furthermore, you would need even faster lasers than what are available to study this type of process. Femtosecond Spectroscopy is an extremely common term used to describe what is a "common" spectroscopic technique in analytical and physical chemistry. It is used all the time. This article is full of misunderstandings and incorrect statements. There are no lasers used in analytical chemistry for spectroscopic purposes with pulse duration of "a couple" or "a few" femtoseconds. that would be a ridiculously powerful laser beam, and it would also be almost impossible to detect using modern optics and electronics due to noise. that also pushes the limit of uncertainty and reality. making a femtosecond pulse requires "shaping" the beam, which requires electronics and materials that can operate in such a regime. 200-600 femtoseconds is the usual range, and the upper limit of that is extremely difficult in practice to achieve. Also, Pump Probe spectroscopy is not "simple." It is a complex, extremely powerful and widely used technique that is ubiquitous in experimental physical and analytical chemistry. You will find literally thousands of articles published in 2011 or 2010 that include this technique (femtosecond Pump Probe) or related techniques (Like hole burning).68.6.76.31 (talk) 05:02, 3 August 2011 (UTC)[reply]

Despite your assertions there is a field of research on femtosecond chemistry. Femtosecond chemistry is an active field both in theoretical and experimental work. I will update this article soon to reflect it. What is your basis for the assertions you make? I see no references. edit: I should point out also that femtosecond spectroscopy redirects here. IRWolfie- (talk) 08:17, 4 August 2011 (UTC)[reply]

For an encyclopedia the question is not whether there "is" or "is not" such a field, but whether the term is used in the scientific literature. A Google search for "femtochemistry" yields 145 000 results, including conferences, books, etc. The article needs to include some key references which use the term. For example an early key reference, which may have introduced the term, is Zewail's 1994 book Femtochemistry Ultrafast dynamics of the chemical bond. Dirac66 (talk) 13:29, 4 August 2011 (UTC)[reply]

The use of the term comes before 1994 see these scholar.google.com results for example (i've selected years before 1994): [1] IRWolfie- (talk) 16:12, 30 October 2011 (UTC)[reply]

Along with the use of the term being coined by Zewail in 1988 (which I will be providing the source from the original journal article that published the use of the word by himself), I would also like to mention that the first link to the Nobel Prize Website does lead to the website, but does not show the article/source required. Here is the citation I have found for the first use of the term femtochemistry by Zewail himself in 1988. [Zewail, Ahmed H. “Laser Femtochemistry.” Science, vol. 242, no. 4886, 1988, pp. 1645–1653. JSTOR, www.jstor.org/stable/1703394. Accessed 23 Mar. 2020.] — Preceding unsigned comment added by DavidSwagez (talk • contribs) 00:34, 23 March 2020 (UTC) DavidSwagez (talk) 00:41, 23 March 2020 (UTC)[reply]

I should mention that femtosecond lasers also do exist, for example lasers based on the commerically available Ti:sapphire laser. IRWolfie- (talk) 16:40, 30 October 2011 (UTC)[reply]

More examples, any limitations[edit]

More examples would help; and some idea of what reactions can or can't be studied with pump-probe spectroscopy. Can it be used for organic reactions ? Is it only gas phase reactions ? - Rod57 (talk) 11:35, 21 January 2020 (UTC)[reply]

Any relation to "pump-probe microscopy"?[edit]

Pump-probe microscopy is an orphan article, I wonder if it's related to the "pump–probe spectroscopy" mentioned in this article. Should it be linked and relation, if any, explained? Edit: also flash photolysis? zmm (talk) 12:51, 28 May 2020 (UTC)[reply]