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Time-Resolved Signatures in Substituted Cyanine Dyes

Exploring intramolecular responses in cyanine dyes, from structure to optical properties, with applications in solar energy capture and biomedical imaging. Study includes electronic structures, chirp responses, and energy relaxation mechanisms. Experimental setup details and fluoresence stimulated emission findings. Seeking students to join Dantus Research Group.

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Time-Resolved Signatures in Substituted Cyanine Dyes

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  1. Time-Resolved Signatures Across the Intramolecular Response in Substituted Cyanine Dyes Muath Nairat Dantus Research Group 6/20/2017 Nairat, M. et al., Phys. Chem. Chem. Phys. 2017,19, 14085

  2. Cyanines structure & optical response Absorbance Guennic B. et al Acc. Chem. Res. 2015, 48, 530 Rosspeintner A. et al Annu. Rev. Phys. Chem. 2015, 64, 247

  3. Applications of cyanines Solar energy capture Biomedical imaging Photodynamic therapy Zhao Y. et al Adv. Optical Mater. 2014, 2, 606 Ormond A. B. et al Materials. 2013, 6, 817 Fang C. et al Sci. Rep. 6, 21013

  4. Cyanine’s electronic structures Unsubstituted cyanine: Substituted cyanine: Non-polar response Polar response

  5. Synthesis

  6. Optical properties Abs. blue shift Stokes shift Substituent Nucleophilicity

  7. Experimental Setup

  8. Positive Chirp Negative Chirp TL Red Blue

  9. Chirp response

  10. Ground state structure PBEα/6-311+G(3d,p) α=0.456

  11. Ground state structure PBEα/6-311+G(3d,p) α=0.456

  12. Excited state potential energy surface CASSCF/6-31G(d)

  13. Excited state potential energy surface

  14. Excited state potential energy surface

  15. Energy relaxation on PES MEP: minimum energy path

  16. Thank you nairatmu@chemistry.msu.edu We are looking for students! Dantus Research Group Nairat, M. et al., Phys. Chem. Chem. Phys. 2017,19, 14085

  17. Fluorescence Stimulated Emission

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