Near infrared (IR) applications have considerably profited from the use of flexible and robust fibre-optical probes. So far, a comparable technique for mid-IR was not available due to low stability and lack of robustness of the fibres. We report the use of a newly developed miniaturised diamond ATR-probe with high chemical resistance and pressure resistance based on robust fibre optics. The routine and convenient application in a glove box to highly air-and oxygen-sensitive reactions on a millilitre scale is reported, as well as the monitoring of a solventless reaction on a litre scale.
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