Need help finding a gas or liquid that absorbs IR and allows visible.

[hemi426]

I am trying to find a gas or liquid that likes to absorb the lower portion of the IR sperctrum (700–1400nm) but let's visible light pass (380-750nm). It can be a liquid or gas because it is going in a sealed container.

I know that water absorbs infrared to a certain extent and that's why the oceans appear blue for the most part. I have also been looking into the greenhouse gas effect and how it helps to trap the heat using water vapor, CO2 and CO3/ozone.
What are the best absorbers of IR that transmit visible light?

Thanks in adavnce

 

[rathat]

I would also be interested in this if anyone knows.

 

[quicknote]

There are several gases and liquids that can absorb infrared (IR) radiation while still allowing visible light to pass through. One option is carbon dioxide (CO2), which is a greenhouse gas and is known to absorb IR radiation in the 700-1400nm range. However, it also absorbs some visible light, so it may not be the best option for your specific needs.

Another option is methane (CH4), which is also a greenhouse gas and absorbs IR radiation in the 700-1400nm range. It has a lower absorbance in the visible range compared to CO2, so it may be a better choice for your application.

Other potential options include sulfur hexafluoride (SF6) and nitrous oxide (N2O), which are both greenhouse gases and have absorbance peaks in the IR range. However, they also have some absorbance in the visible range, so they may not be ideal for your specific requirements.

In terms of liquids, some types of oils, such as mineral oil and silicone oil, have been shown to absorb IR radiation in the 700-1400nm range while still allowing visible light to pass through. However, they may not be as effective as gases in terms of IR absorption.

Ultimately, the best absorber of IR radiation that also transmits visible light will depend on the specific requirements and conditions of your experiment. It may be helpful to consult with a specialist in this field to determine the most suitable option for your needs.