Year 2024

• Triplet–Triplet Annihilation Upconverting Liposomes: Mechanistic Insights into the Role of Membranes in Two-Dimensional TTA-UC

  Publication

  • A. Prabhakaran
  • K. Jha
  • R. Sia
  • R. Arellano
  • N. Sarangi
  • M. Kogut
  • J. Guthmuller
  • J. Czub
  • B. Dietzek-Ivanšić
  • T. Keyes
  • R. C. Sia

  - ACS Applied Materials & Interfaces - Year 2024

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Year 2023

• A BODIPY‐Based Molecular Rotor in Giant Unilamellar Vesicles: A Case Study by Polarization‐Resolved Time‐Resolved Emission and Transient Absorption Spectroscopy

  Publication

  • K. K. Jha
  • A. Prabhakaran
  • L. Spantzel
  • R. C. Sia
  • I. Pérez
  • R. A. Arellano-Reyes
  • A. Elmanova
  • A. Dasgupta
  • C. Eggeling
  • M. Börsch... and 4 others

  - ChemPhotoChem - Year 2023

  BODIPY and BODIPY-derived systems are widely applied as fluorophores and as probes for viscosity detection in solvents and biological media. Their orientational and rotational dynamics in biological media are thus of vital mechanistic importance and extensively investigated. In this contribution, polarization-resolved confocal microscopy is used to determine the orientation of an amphiphilic BODIPY-cholesterol derivative in homogeneous...

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• BODIPY‐Perylene Charge Transfer Compounds; Sensitizers for Triplet‐Triplet Annihilation Up‐conversion

  Publication

  • R. A. Arellano-Reyes
  • A. Prabhakaran
  • R. C. Sia
  • J. Guthmuller
  • K. K. Jha
  • T. Yang
  • B. Dietzek‐Ivanšić
  • V. McKee
  • T. E. Keyes

  - CHEMISTRY-A EUROPEAN JOURNAL - Year 2023

  BODIPY heterochromophores, asymmetrically substituted with perylene and/or iodine at the 2 and 6 positions were prepared and investigated as sensitizers for triplet-triplet annihilation up conversion (TTA-UC). Single-crystal X-ray crystallographic analyses show that the torsion angle between BODIPY and perylene units lie between 73.54 and 74.51, though they are not orthogonal. Both compounds show intense, charge transfer absorption...

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• Triplet Formation and Triplet‐Triplet Annihilation Upconversion in Iodine Substituted Non‐Orthogonal BODIPY‐Perylene Dyads

  Publication

  • K. Kumar Jha
  • A. Prabhakaran
  • R. C. Sia
  • R. A. Arellano-Reyes
  • N. Kumar Sarangi
  • T. Yang
  • K. Kumar
  • S. Kupfer
  • J. Guthmuller
  • T. E. Keyes
  • B. Dietzek-Ivanšić

  - ChemPhotoChem - Year 2023

  BODIPY-perylene dyads have emerged as useful metal free sensitizers for triplet-triplet annihilation upconversion (TTAUC), these dyads are capable of efficient triplet generation via spinorbit charge transfer intersystem crossing (SOCT-ISC). This important route to triplet formation requires dyads in which two moieties are oriented perpendicular to each other. In this contribution, we give a deeper insight on the behavior of recently...

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Year 2021

• Radiative lifetime of a BODIPY dye as calculated by TDDFT and EOM-CCSD methods: solvent and vibronic effects

  Publication

  • R. C. Sia
  • R. A. Arellano-Reyes
  • T. E. Keyes
  • J. Guthmuller

  - PHYSICAL CHEMISTRY CHEMICAL PHYSICS - Year 2021

  The radiative emission lifetime and associated S1 excited state properties of a BODIPY dye are investigated with TDDFT and EOM-CCSD calculations. The effects of a solvent are described with the polarizable continuum model using the linear response (LR) approach as well as state-specific methods. The Franck–Condon (FC), Herzberg–Teller (HT) and Duschinsky vibronic effects are evaluated for the absorption and emission spectra, and...

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