Observations on the Absorption and Emission of Aqueous Vapor and Carbon Dioxide in the Infra-Red Spectrum

1898 ◽  
Vol 8 ◽  
pp. 176 ◽  
Author(s):  
H. Rubens ◽  
E. Aschkinass
Keyword(s):  
Carbon Dioxide ◽  
Absorption And Emission ◽  
Infra Red

Near infra-red dyes based on pyrene aza-BODIPYs

2018 ◽  
Vol 42 (8) ◽  
pp. 5875-5888 ◽  
Author(s):  
Naresh Balsukuri ◽  
Nayan Jyoti Boruah ◽  
Praseetha E. Kesavan ◽  
Iti Gupta
Keyword(s):  
Energy Transfer ◽  
Emission Spectra ◽  
Efficient Energy Transfer ◽  
Absorption And Emission ◽  
Efficient Energy ◽  
Absorption And Emission Spectra ◽  
Infra Red ◽  
Donor Acceptor

Donor–acceptor type pyrene substituted aza-BODIPYs are reported, and efficient energy transfer from pyrene moieties to the aza-BODIPY core caused significant red shifts in their absorption and emission spectra.

scholarly journals The estimation of small quantities of carbon dioxide in air by the absorption of infra-red radiation

1940 ◽  
Vol 129 (857) ◽  
pp. 468-474 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Absorption Band ◽  
Water Vapour ◽  
Preliminary Treatment ◽  
Transmitted Radiation ◽  
Infra Red ◽  
Red Radiation

This paper describes an investigation of the possibility of measuring small amounts of carbon dioxide in air by the absorption of infra-red radiation. It is shown that the method is simple, trustworthy and accurate, and is very sensitive for small amounts of carbon dioxide, of the order of that present in ordinary air. The principle is applied in a form superior to any hitherto used, in that the whole of the transmitted radiation is measured instead of merely the radiation at the maximum of a particular absorption band. This makes a spectrometer unnecessary, eliminates the disturbing effect of variation of temperature, and allows much less sensitive detecting apparatus to be used. The only preliminary treatment necessary is the removal of water vapour from the air under examination.

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