Unravel excited state chirality dynamics during symmetry-breaking charge separation

Tong Cui; Xueli Wang; Haifeng Pan; Jinquan Chen

doi:10.1007/s40843-025-3784-9

Unravel excited state chirality dynamics during symmetry-breaking charge separation

Tong Cui
, Xueli Wang
, Haifeng Pan
, Jinquan Chen^*

^*Corresponding author for this work

Institute for Advanced Study in Precision Spectroscopy

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

Abstract

Symmetry-breaking charge separation (SB-CS) processes hold significant importance during natural light harvesting and exhibit potential application in the field of organic semiconductors. However, the impact of SB-CS on the excited-state chirality has not yet been fully investigated. Herein, we combine femtosecond time-resolved circularly polarized luminescence (TRCPL) and transient absorption (TA) spectroscopy to study the excited state chirality dynamics of a chiral perylenediimide (Cy-PDI₂). The extracted time-dependent emission dissymmetry factor g_lum(t) indicates that there is a one order of magnitude enhancement of its CPL emission after the SB-CS process. For the first time, the impact of SB-CS on the generation and evolution of excited state dynamics is revealed, and the underlying mechanism is proposed. (Figure presented.)

Translated title of the contribution	揭示对称破缺电荷分离过程中的激发态手性动力学
Original language	English
Journal	Science China Materials
DOIs	https://doi.org/10.1007/s40843-025-3784-9
State	Accepted/In press - 2026

Keywords

chiral perylenediimide
excited state chirality
symmetry-breaking charge separation
time-resolved circularly polarized luminescence spectroscopy

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10.1007/s40843-025-3784-9

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title = "Unravel excited state chirality dynamics during symmetry-breaking charge separation",

abstract = "Symmetry-breaking charge separation (SB-CS) processes hold significant importance during natural light harvesting and exhibit potential application in the field of organic semiconductors. However, the impact of SB-CS on the excited-state chirality has not yet been fully investigated. Herein, we combine femtosecond time-resolved circularly polarized luminescence (TRCPL) and transient absorption (TA) spectroscopy to study the excited state chirality dynamics of a chiral perylenediimide (Cy-PDI2). The extracted time-dependent emission dissymmetry factor glum(t) indicates that there is a one order of magnitude enhancement of its CPL emission after the SB-CS process. For the first time, the impact of SB-CS on the generation and evolution of excited state dynamics is revealed, and the underlying mechanism is proposed. (Figure presented.)",

keywords = "chiral perylenediimide, excited state chirality, symmetry-breaking charge separation, time-resolved circularly polarized luminescence spectroscopy",

author = "Tong Cui and Xueli Wang and Haifeng Pan and Jinquan Chen",

note = "Publisher Copyright: {\textcopyright} Science China Press 2026.",

year = "2026",

doi = "10.1007/s40843-025-3784-9",

language = "英语",

journal = "Science China Materials",

issn = "2095-8226",

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TY - JOUR

T1 - Unravel excited state chirality dynamics during symmetry-breaking charge separation

AU - Cui, Tong

AU - Wang, Xueli

AU - Pan, Haifeng

AU - Chen, Jinquan

N1 - Publisher Copyright: © Science China Press 2026.

PY - 2026

Y1 - 2026

N2 - Symmetry-breaking charge separation (SB-CS) processes hold significant importance during natural light harvesting and exhibit potential application in the field of organic semiconductors. However, the impact of SB-CS on the excited-state chirality has not yet been fully investigated. Herein, we combine femtosecond time-resolved circularly polarized luminescence (TRCPL) and transient absorption (TA) spectroscopy to study the excited state chirality dynamics of a chiral perylenediimide (Cy-PDI2). The extracted time-dependent emission dissymmetry factor glum(t) indicates that there is a one order of magnitude enhancement of its CPL emission after the SB-CS process. For the first time, the impact of SB-CS on the generation and evolution of excited state dynamics is revealed, and the underlying mechanism is proposed. (Figure presented.)

AB - Symmetry-breaking charge separation (SB-CS) processes hold significant importance during natural light harvesting and exhibit potential application in the field of organic semiconductors. However, the impact of SB-CS on the excited-state chirality has not yet been fully investigated. Herein, we combine femtosecond time-resolved circularly polarized luminescence (TRCPL) and transient absorption (TA) spectroscopy to study the excited state chirality dynamics of a chiral perylenediimide (Cy-PDI2). The extracted time-dependent emission dissymmetry factor glum(t) indicates that there is a one order of magnitude enhancement of its CPL emission after the SB-CS process. For the first time, the impact of SB-CS on the generation and evolution of excited state dynamics is revealed, and the underlying mechanism is proposed. (Figure presented.)

KW - chiral perylenediimide

KW - excited state chirality

KW - symmetry-breaking charge separation

KW - time-resolved circularly polarized luminescence spectroscopy

UR - https://www.scopus.com/pages/publications/105027792190

U2 - 10.1007/s40843-025-3784-9

DO - 10.1007/s40843-025-3784-9

M3 - 文章

AN - SCOPUS:105027792190

SN - 2095-8226

JO - Science China Materials

JF - Science China Materials

ER -

Unravel excited state chirality dynamics during symmetry-breaking charge separation

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Keywords

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