Active and passive control of zinc phthalocyanine photodynamics

Divya Sharma, Jannetje Maria Huijser, Janne Savolainen, Gerrit Willem Steen, Jennifer Lynn Herek

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

In this work we report on the ultrafast photodynamics of the photosensitizer zinc phthalocyanine (ZnPc) and manipulation thereof. Two approaches are followed: active control via pulse shaping and passive control via strategic manipulation in the periphery of the molecular structure. The objective of both of these control experiments is the same: to enhance the yield of the functional pathway and to minimize loss channels. The aim of the active control experiments is to increase the intersystem crossing yield in ZnPc, which is important for application in photodynamic therapy (PDT). Pulse shaping allowed an improvement in triplet to singlet ratio of 15% as compared to a transform-limited pulse. This effect is ascribed to a control mechanism that utilizes multiphoton pathways to higher-lying states from where intersystem crossing is more likely to occur. The passive control experiments are performed on ZnPc derivatives deposited onto TiO2, serving as a model system of a dye-sensitized solar cell (DSSC). Modification of the anchoring ligand of the molecular structure resulted in an increased rate for electron injection into TiO2 and slower back electron transfer, improving the DSSC efficiency.
Original languageEnglish
Pages (from-to)433-445
Number of pages12
JournalFaraday discussions
Volume163
DOIs
Publication statusPublished - 8 Apr 2013

Fingerprint

active control
zinc
manipulators
Pulse shaping
molecular structure
solar cells
pulses
dyes
Molecular structure
therapy
electron transfer
Photodynamic therapy
Electron injection
Photosensitizing Agents
Experiments
injection
ligands
Zn(II)-phthalocyanine
Mathematical transformations
Ligands

Keywords

  • METIS-295542
  • IR-85335

Cite this

Sharma, Divya ; Huijser, Jannetje Maria ; Savolainen, Janne ; Steen, Gerrit Willem ; Herek, Jennifer Lynn. / Active and passive control of zinc phthalocyanine photodynamics. In: Faraday discussions. 2013 ; Vol. 163. pp. 433-445.
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abstract = "In this work we report on the ultrafast photodynamics of the photosensitizer zinc phthalocyanine (ZnPc) and manipulation thereof. Two approaches are followed: active control via pulse shaping and passive control via strategic manipulation in the periphery of the molecular structure. The objective of both of these control experiments is the same: to enhance the yield of the functional pathway and to minimize loss channels. The aim of the active control experiments is to increase the intersystem crossing yield in ZnPc, which is important for application in photodynamic therapy (PDT). Pulse shaping allowed an improvement in triplet to singlet ratio of 15{\%} as compared to a transform-limited pulse. This effect is ascribed to a control mechanism that utilizes multiphoton pathways to higher-lying states from where intersystem crossing is more likely to occur. The passive control experiments are performed on ZnPc derivatives deposited onto TiO2, serving as a model system of a dye-sensitized solar cell (DSSC). Modification of the anchoring ligand of the molecular structure resulted in an increased rate for electron injection into TiO2 and slower back electron transfer, improving the DSSC efficiency.",
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Active and passive control of zinc phthalocyanine photodynamics. / Sharma, Divya; Huijser, Jannetje Maria; Savolainen, Janne; Steen, Gerrit Willem; Herek, Jennifer Lynn.

In: Faraday discussions, Vol. 163, 08.04.2013, p. 433-445.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Active and passive control of zinc phthalocyanine photodynamics

AU - Sharma, Divya

AU - Huijser, Jannetje Maria

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AU - Herek, Jennifer Lynn

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AB - In this work we report on the ultrafast photodynamics of the photosensitizer zinc phthalocyanine (ZnPc) and manipulation thereof. Two approaches are followed: active control via pulse shaping and passive control via strategic manipulation in the periphery of the molecular structure. The objective of both of these control experiments is the same: to enhance the yield of the functional pathway and to minimize loss channels. The aim of the active control experiments is to increase the intersystem crossing yield in ZnPc, which is important for application in photodynamic therapy (PDT). Pulse shaping allowed an improvement in triplet to singlet ratio of 15% as compared to a transform-limited pulse. This effect is ascribed to a control mechanism that utilizes multiphoton pathways to higher-lying states from where intersystem crossing is more likely to occur. The passive control experiments are performed on ZnPc derivatives deposited onto TiO2, serving as a model system of a dye-sensitized solar cell (DSSC). Modification of the anchoring ligand of the molecular structure resulted in an increased rate for electron injection into TiO2 and slower back electron transfer, improving the DSSC efficiency.

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