Morton's theorem: Difference between revisions
en>Planetary Chaos Redux deredlinked to personal name per WP:rednot |
en>BG19bot m →An example: WP:CHECKWIKI error fix #40. Convert HTML to wikicode. Do general fixes and cleanup if needed. - using AWB (8788) |
||
| Line 1: | Line 1: | ||
'''Bathochromic shift''' is a change of spectral band position in the [[absorption spectrum|absorption]], [[reflectance]], [[transmittance]], or [[emission spectrum]] of a molecule to a longer [[wavelength]] (lower [[frequency]]).<ref>{{GoldBookRef|title=bathochromic shift (effect)|url=http://goldbook.iupac.org/B00618.html}}</ref> | |||
Because the [[red]] color in the [[visible spectrum]] has a longer wavelength than most other colors, this effect is also commonly called a '''red shift''', although this usage is considered informal,<ref>[http://www.iupac.org/reports/1996/6812verhoeven/R.htm#redshift Glossary of Terms Used in Photochemistry]</ref> and has no relation to [[Doppler shift]] or other wavelength-independent meanings of [[redshift]]. This usage is often found in the [[scientific literature]]<!-- Reference here when I get a chance - Stillnotelf -->. | |||
This can occur because of a change in environmental conditions: for example, a change in solvent [[Chemical polarity|polarity]] will result in [[solvatochromism]]. A series of structurally related molecules in a [[Substitution (chemistry)|substitution]] series can also show a bathochromic shift. Bathochromic shift is a phenomenon seen in ''molecular'' spectra, not ''atomic'' spectra; it is thus more common to speak of the movement of the peaks in the spectrum rather than lines. | |||
:<math>\Delta\lambda = \lambda^{\mathrm{state 2}}_{\mathrm{observed}} - \lambda^{\mathrm{state 1}}_{\mathrm{observed}}</math> where <math>\lambda</math> is the wavelength of the spectral peak of interest and <math>\lambda^{\mathrm{state 2}}_{\mathrm{observed}} > \lambda^{\mathrm{state 1}}_{\mathrm{observed}}</math> | |||
Bathochromic shift is typically demonstrated using a [[spectrophotometer]], [[Tristimulus colorimeter|colorimeter]], or [[spectroradiometer]]. | |||
==References== | |||
{{Reflist}} | |||
==See also== | |||
* [[Hypsochromic shift]], a change to shorter wavelength (higher frequency) | |||
[[Category:Chromism]] | |||
[[Category:Spectroscopy]] | |||
[[it:Iperconiugazione]] | |||
Revision as of 00:45, 10 December 2012
Bathochromic shift is a change of spectral band position in the absorption, reflectance, transmittance, or emission spectrum of a molecule to a longer wavelength (lower frequency).[1]
Because the red color in the visible spectrum has a longer wavelength than most other colors, this effect is also commonly called a red shift, although this usage is considered informal,[2] and has no relation to Doppler shift or other wavelength-independent meanings of redshift. This usage is often found in the scientific literature.
This can occur because of a change in environmental conditions: for example, a change in solvent polarity will result in solvatochromism. A series of structurally related molecules in a substitution series can also show a bathochromic shift. Bathochromic shift is a phenomenon seen in molecular spectra, not atomic spectra; it is thus more common to speak of the movement of the peaks in the spectrum rather than lines.
- where is the wavelength of the spectral peak of interest and
Bathochromic shift is typically demonstrated using a spectrophotometer, colorimeter, or spectroradiometer.
References
43 year old Petroleum Engineer Harry from Deep River, usually spends time with hobbies and interests like renting movies, property developers in singapore new condominium and vehicle racing. Constantly enjoys going to destinations like Camino Real de Tierra Adentro.
See also
- Hypsochromic shift, a change to shorter wavelength (higher frequency)