한빛사 논문
Weijie Chia,†, Qinglong Qiaob,†, Richmond Leea, Wenjuan Liub, Yock Siong Teoc, Danning Guc, Matthew John Langc,d, Young-Tae Change,* Zhaochao Xub,* and Xiaogang Liua,*
aScience and Math Cluster, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372 (Singapore)
bCAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023 (China)
cSingapore-MIT Alliance for Research and Technology (SMART), 1 CREATE Way, Singapore 138602 (Singapore)
dDepartment of Chemical and Biomolecular Engineering and Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37235 (USA)
eCenter for Self-Assembly and Complexity, Institute for Basic Science (IBS), Pohang 37673 (Republic of Korea), and Department of Chemistry, Pohang University of Science and Technology (POSTECH)
Pohang 37673 (Republic of Korea)
†These authors contributed equally to this work.
*To whom correspondence should be addressed.
Abstract
Charge transfer and separation are important processes governing numerous chemical reactions. Fundamental understanding of these processes and the underlying mechanisms is critical for photochemistry. Herein, we report the discovery of a new charge‐transfer and separation process, namely the twisted intramolecular charge shuttle (TICS). In TICS systems, the donor and acceptor moieties dynamically switch roles in the excited state because of an approximately 90° intramolecular rotation. TICS systems thus exhibit charge shuttling. TICSs exist in several chemical families of fluorophores (such as coumarin, BODIPY, and oxygen/carbon/silicon–rhodamine), and could be utilized to construct functional fluorescent probes (i.e., viscosity‐ or biomolecule‐sensing probes). The discovery of the TICS process expands the current perspectives of charge‐transfer processes and will inspire future applications.
Keywords : charge transfer and separation, fluorescent probes, fluorophore, biosensors, donor–acceptor systems
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