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We report long-lived charge separation in a highly rigid host-guest complex of pentiptycene bis(crown ether) and Li(+)@C60, in which the pentiptycene framework is actively involved as an electron donor in a photoinduced electron-transfer process to the excited states of Li(+)@C60 through a rigid distance in the complex.
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http://dx.doi.org/10.1039/c4cc07795d | DOI Listing |
J Am Chem Soc
September 2025
Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States.
Recently photoinduced dynamic ligation in a metal-organic frameworks (MOFs) was reported, where a long-lived charge-transfer excited state (ca. 30 μs) featuring partial dissociation between the carboxylate linker and metal-based node was probed by time-resolved infrared (TRIR) spectroscopy. The study offers a new mechanistic perspective to evaluate the potential contribution from the excited state molecular configuration to the performance of MOF photocatalysts.
View Article and Find Full Text PDFInorg Chem
September 2025
Yunnan Key Laboratory of Crystalline Porous Organic Functional Materials, College of Chemical and Materials Engineering, Qujing Normal University, Qujing 655011, China.
Sequential assembly of donor-acceptor components at the molecular level within a MOF is an effective strategy to achieve efficient electron-hole separation for enhancing the activity of photocatalysts. Meanwhile, the highly efficient and selective functionalization of tetrahydroisoquinoline (THIQ) under mild conditions remains an urgent demand in both the scientific and industrial communities. This work reports a donor-acceptor MOF photocatalyst () constructed by the coordinated assembly of donor and acceptor components, in which a naphthalene unit serves as an electron donor and a perylenediimide unit as an electron acceptor.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
College of Polymer Science and Engineering, State Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, 610065, P.R. China.
Designing long-lived excitons in photocatalysts is crucial for efficient charge separation. However, most of the current organic photocatalysts are characterized by a relatively short exciton lifetime within the range of picoseconds due to localized excitons with large binding energies. Herein, we report the design of ultralong-lived excitons with a lifetime exceeding 8000 ps by constructing metallo-quinoline-incorporated covalent organic frameworks (COFs).
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India.
Unique optoelectronic and surface properties of quantum dots (QDs) make them promising materials for several scientific explorations, especially in solar energy research. Understanding the dynamics of charge carrier separation and extraction is essential to enhancing the performance of QD-based light-harvesting devices. Herein, we investigate the photoinduced electron transfer (PET) process in blue-emitting QDs based on indium phosphide (InP)─the latest addition to luminescent materials.
View Article and Find Full Text PDFNat Commun
August 2025
State Key Laboratory of Chemical Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
Charge-transfer (CT) states with long transport distances are highly desired for promoting the performance of organic optoelectronic devices in photoconversion and electroluminescence. However, due to the limited lifetime and small diffusivity, only nanoscale CT transport has been observed so far. Herein, taking a binary CT cocrystal (trans-1,2-diphenylethylene-1,2,4,5-tetracyanobenzene, named as T-T) with efficient thermally activated delayed fluorescence (TADF) as a model material, we report the direct observation of long-distance CT exciton transport by using modified time-resolved and photoluminescence-scanned imaging microscopy, which reveals a triplet-assisted CT transport mechanism.
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