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 - 2026/5
Y1 - 2026/5
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
VL - 69
SP - 2549
EP - 2555
JO - Science China Materials
JF - Science China Materials
IS - 5
ER -