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Thermo‐Chromium: A Contactless Optical Molecular Thermometer
Author(s) -
Otto Sven,
Scholz Norman,
Behnke Thomas,
ReschGenger Ute,
Heinze Katja
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701726
Subject(s) - thermometer , chromium , materials science , polystyrene , nanocarriers , excited state , aqueous solution , atmospheric temperature range , micelle , nanotechnology , polymer , analytical chemistry (journal) , chemical engineering , nanoparticle , chemistry , organic chemistry , thermodynamics , physics , metallurgy , composite material , nuclear physics , engineering
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.