Light-Triggered Enhancement of Fluorescence Efficiency in Organic Cages

Zhenyu Yang; Ramesh Nandi; Anna Orieshyna; Renana Gershoni-Poranne; Shaodong Zhang; Nadav Amdursky

doi:https://doi.org/10.1021/acs.jpclett.3c02667

Light-Triggered Enhancement of Fluorescence Efficiency in Organic Cages

Zhenyu Yang, Ramesh Nandi, Anna Orieshyna, Renana Gershoni-Poranne, Shaodong Zhang, Nadav Amdursky

Chemistry

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

The fluorescence efficiency of excited molecules can be enhanced by many external factors. Here, we showcase a surprising phenomenon whereby light is used as a gating source to increase the fluorescence efficiency of organic cages composed of biphenyl subunits. We show that the enhancement of fluorescence is not due to structural changes or ground-state events. Cryo-fluorescence measurements and kinetic studies suggest a restriction of the phenyl-based structures in the excited state, leading to increased fluorescence, which is also supported by time-resolved measurements. Through computational calculations, we propose that the planarization of the biphenyl units within the cages contributes to emission enhancement. This phenomenon offers insights into the design of optoelectronic structures with improved fluorescence properties.

Original language	English
Pages (from-to)	136-141
Number of pages	6
Journal	Journal of Physical Chemistry Letters
DOIs	https://doi.org/10.1021/acs.jpclett.3c02667
State	Published - 11 Jan 2024

All Science Journal Classification (ASJC) codes

General Materials Science
Physical and Theoretical Chemistry

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title = "Light-Triggered Enhancement of Fluorescence Efficiency in Organic Cages",

abstract = "The fluorescence efficiency of excited molecules can be enhanced by many external factors. Here, we showcase a surprising phenomenon whereby light is used as a gating source to increase the fluorescence efficiency of organic cages composed of biphenyl subunits. We show that the enhancement of fluorescence is not due to structural changes or ground-state events. Cryo-fluorescence measurements and kinetic studies suggest a restriction of the phenyl-based structures in the excited state, leading to increased fluorescence, which is also supported by time-resolved measurements. Through computational calculations, we propose that the planarization of the biphenyl units within the cages contributes to emission enhancement. This phenomenon offers insights into the design of optoelectronic structures with improved fluorescence properties.",

author = "Zhenyu Yang and Ramesh Nandi and Anna Orieshyna and Renana Gershoni-Poranne and Shaodong Zhang and Nadav Amdursky",

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T1 - Light-Triggered Enhancement of Fluorescence Efficiency in Organic Cages

AU - Yang, Zhenyu

AU - Nandi, Ramesh

AU - Orieshyna, Anna

AU - Gershoni-Poranne, Renana

AU - Zhang, Shaodong

AU - Amdursky, Nadav

PY - 2024/1/11

Y1 - 2024/1/11

N2 - The fluorescence efficiency of excited molecules can be enhanced by many external factors. Here, we showcase a surprising phenomenon whereby light is used as a gating source to increase the fluorescence efficiency of organic cages composed of biphenyl subunits. We show that the enhancement of fluorescence is not due to structural changes or ground-state events. Cryo-fluorescence measurements and kinetic studies suggest a restriction of the phenyl-based structures in the excited state, leading to increased fluorescence, which is also supported by time-resolved measurements. Through computational calculations, we propose that the planarization of the biphenyl units within the cages contributes to emission enhancement. This phenomenon offers insights into the design of optoelectronic structures with improved fluorescence properties.

AB - The fluorescence efficiency of excited molecules can be enhanced by many external factors. Here, we showcase a surprising phenomenon whereby light is used as a gating source to increase the fluorescence efficiency of organic cages composed of biphenyl subunits. We show that the enhancement of fluorescence is not due to structural changes or ground-state events. Cryo-fluorescence measurements and kinetic studies suggest a restriction of the phenyl-based structures in the excited state, leading to increased fluorescence, which is also supported by time-resolved measurements. Through computational calculations, we propose that the planarization of the biphenyl units within the cages contributes to emission enhancement. This phenomenon offers insights into the design of optoelectronic structures with improved fluorescence properties.

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U2 - https://doi.org/10.1021/acs.jpclett.3c02667

DO - https://doi.org/10.1021/acs.jpclett.3c02667

M3 - مقالة

C2 - 38147826

SN - 1948-7185

SP - 136

EP - 141

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

ER -

Light-Triggered Enhancement of Fluorescence Efficiency in Organic Cages

Abstract

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