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<p>The photophysical properties of an anthraquinone based dye, Solvent Green 3 (<b>SG3</b>) were investigated in chloroform solution and stearic acid supported Langmuir-Blodgett films (<b>SG-LB</b>) by steady state and time-resolved spectroscopic techniques. Both steady state and time-resolved studies were performed for <b>SG3</b> in chloroform solution (1 µM) whereas only steady-state measurements were performed for the <b>SG-LB</b> films. The studies revealed that the photodynamics of <b>SG3</b> are guided by deexcitation of energetically separated conformers and aggregates of <b>SG3</b>, namely the closed form (<b>CF</b>) and open form (<b>OF</b>) in solution. However, in <b>SG-LB</b>, the <b>OF</b> dominates the photophysical properties. The current report sheds light on the effect of conformational confinement on the photophysical properties of organic dye molecules, thereby enabling better understanding of photo behaviour of small organic molecules.</p> Graphical Abstract <p></p>

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Probing the Excited State Photophysics of an Anthraquinone Based Dye in Solution and LB Films

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Sutapa Deb,
  • Ranendu Kumar Nath,
  • Arghyadeep Bhattacharyya

摘要

The photophysical properties of an anthraquinone based dye, Solvent Green 3 (SG3) were investigated in chloroform solution and stearic acid supported Langmuir-Blodgett films (SG-LB) by steady state and time-resolved spectroscopic techniques. Both steady state and time-resolved studies were performed for SG3 in chloroform solution (1 µM) whereas only steady-state measurements were performed for the SG-LB films. The studies revealed that the photodynamics of SG3 are guided by deexcitation of energetically separated conformers and aggregates of SG3, namely the closed form (CF) and open form (OF) in solution. However, in SG-LB, the OF dominates the photophysical properties. The current report sheds light on the effect of conformational confinement on the photophysical properties of organic dye molecules, thereby enabling better understanding of photo behaviour of small organic molecules.

Graphical Abstract