Thermo‐Chromium: A Contactless Optical Molecular Thermometer. Issue 50 (15th May 2017)

• Record Type: Journal Article
• Authors: Otto, Sven; Scholz, Norman; Behnke, Thomas; Resch‐Genger, Ute; Heinze, Katja
• Is Part Of: Chemistry. Volume 23:Issue 50(2017)
• Page Start: 12131
• Page End: 12135
• Publication Date: 2017-05-15
• Subjects: chromium -- dual emission -- NIR emission -- temperature sensing -- thermometry; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201701726
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The unparalleled excited‐state potential‐energy landscape of the chromium(III)‐based dye[1] 3+ ([Cr(ddpd)2 ] 3+ ; ddpd= N, N′ ‐dimethyl‐ N, N′ ‐dipyridin‐2‐yl‐pyridin‐2, 6‐diamine) enables a strong dual emission in the near infrared region. The temperature dependence of this dual emission allows the use of[1] 3+ as an unprecedented molecular ratiometric thermometer in the 210–373 K temperature range in organic and in aqueous media. Incorporation of[1] 3+ in biocompatible nanocarriers, such as 100 nm‐sized polystyrene nanoparticles and solutol micelles, provides nanodimensional thermometers operating under physiological conditions. Abstract : The unparalleled excited‐state potential‐energy landscape of the chromium(III)‐based dye [Cr(ddpd)2 ] 3+ (ddpd= N, N′ ‐dimethyl‐ N, N′ ‐dipyridin‐2‐yl‐pyridin‐2, 6‐diamine) enables a strong dual emission in the near infrared region. The temperature dependence of this dual emission allows its use as an unprecedented molecular ratiometric thermometer in the 210–373 K temperature range in organic and in aqueous media (see scheme).