Smart responsive phosphorescent materials for data recording and security protection

Huibin Sun, Shujuan Liu, Wenpeng Lin, Kenneth Yin Zhang, Wen Lv, Xiao Huang, Fengwei Huo, Huiran Yang, Gareth Jenkins, Qiang Zhao () and Wei Huang ()
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Huibin Sun: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Shujuan Liu: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Wenpeng Lin: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Kenneth Yin Zhang: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Wen Lv: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Xiao Huang: Institute of Advanced Materials and Jiangsu-Singapore Joint Research Center for Organic/Bio- Electronics & Information Displays, Nanjing Tech University, 30 South Puzhu Road
Fengwei Huo: Institute of Advanced Materials and Jiangsu-Singapore Joint Research Center for Organic/Bio- Electronics & Information Displays, Nanjing Tech University, 30 South Puzhu Road
Huiran Yang: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Gareth Jenkins: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Qiang Zhao: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road
Wei Huang: Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Smart luminescent materials that are responsive to external stimuli have received considerable interest. Here we report ionic iridium (III) complexes simultaneously exhibiting mechanochromic, vapochromic and electrochromic phosphorescence. These complexes share the same phosphorescent iridium (III) cation with a N-H moiety in the N^N ligand and contain different anions, including hexafluorophosphate, tetrafluoroborate, iodide, bromide and chloride. The anionic counterions cause a variation in the emission colours of the complexes from yellow to green by forming hydrogen bonds with the N-H proton. The electronic effect of the N-H moiety is sensitive towards mechanical grinding, solvent vapour and electric field, resulting in mechanochromic, vapochromic and electrochromic phosphorescence. On the basis of these findings, we construct a data-recording device and demonstrate data encryption and decryption via fluorescence lifetime imaging and time-gated luminescence imaging techniques. Our results suggest that rationally designed phosphorescent complexes may be promising candidates for advanced data recording and security protection.

Date: 2014
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DOI: 10.1038/ncomms4601

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