Excited-state structural relaxation and exciton delocalization dynamics in linear and cyclic π-conjugated oligothiophenes

KH Park, W Kim, J Yang, D Kim - Chemical Society Reviews, 2018 - pubs.rsc.org
π-Conjugated oligothiophene is considered a chain segment of its polymeric counterpart,
whose size and shape can be precisely controlled. Because of its simplified structure, it is …

Modulation of symmetry-breaking intramolecular charge-transfer dynamics assisted by pendant side chains in π-linkers in quadrupolar diketopyrrolopyrrole …

W Kim, J Sung, M Grzybowski, DT Gryko… - The Journal of Physical …, 2016 - ACS Publications
The effect of the length of pendant side chains in centrosymmetric quadrupolar molecules on
dynamics of their most perplexing photophysical phenomenon, ie, symmetry-breaking …

Ultrafast photophysics of multiple-resonance ultrapure blue emitters

Y Gao, Y Wang, Z Guo, Y Wan, C Li… - The Journal of …, 2022 - ACS Publications
Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters are
becoming increasingly attractive due to their applications in high-resolution organic light …

Synthesis, isolation, and properties of all head-to-tail cyclic poly (3-hexylthiophene): Fully delocalized exciton over the defect-free ring polymer

T Yamamoto, M Hosokawa, M Nakamura, S Sato… - …, 2018 - ACS Publications
The synthesis of defect-free cyclic poly (3-hexylthiophene)(P3HT) was achieved for the first
time by the GRIM polymerization using an appropriate initiator, cyclization by a Pd-mediated …

Size-independent energy transfer in biomimetic nanoring complexes

P Parkinson, N Kamonsutthipaijit, HL Anderson… - Acs Nano, 2016 - ACS Publications
Supramolecular antenna-ring complexes are of great interest due to their presence in
natural light-harvesting complexes. While such systems are known to provide benefits …

Reduction of Ethynylenes to Vinylenes in a Macrocyclic π-Extended Thiophene Skeleton Under McMurry Coupling Conditions

K Shirahata, M Takashika, K Hirabayashi… - The Journal of …, 2020 - ACS Publications
McMurry coupling is one of the most useful and convenient tools for the preparation of π-
conjugated molecules. However, for the synthesis of strained macrocycles containing …

Exciton coupling dynamics in syn-and anti-type β–β linked Zn (ii) porphyrin linear arrays

T Kim, J Oh, HW Jiang, T Tanaka, A Osuka… - Physical Chemistry …, 2016 - pubs.rsc.org
The photophysical properties of molecular arrays are strongly dependent on a variety of
structural factors: the constituent chromophores, dihedral angle, linkage length, linkage …

Ultrafast Exciton Self‐Trapping and Delocalization in Cycloparaphenylenes: The Role of Excited‐State Symmetry in Electron‐Vibrational Coupling

J Kim, R Kishi, E Kayahara, W Kim… - Angewandte Chemie …, 2020 - Wiley Online Library
Upon photon absorption, π‐conjugated organics are apt to undergo ultrafast structural
reorganization via electron‐vibrational coupling during non‐adiabatic transitions. Ultrafast …

Chain-length-dependent exciton dynamics in linear oligothiophenes probed using ensemble and single-molecule spectroscopy

TW Kim, W Kim, KH Park, P Kim, JW Cho… - The Journal of …, 2016 - ACS Publications
Exciton dynamics in π-conjugated molecular systems is highly susceptible to conformational
disorder. Using time-resolved and single-molecule spectroscopic techniques, the effect of …

Defining cyclic–acyclic exciton transition at the single-molecule level: size-dependent conformational heterogeneity and exciton delocalization in ethynylene-bridged …

KH Park, JW Cho, TW Kim, H Shimizu… - The Journal of …, 2016 - ACS Publications
Conformational disorder in π-conjugated cyclic systems plays a crucial role in controlling the
extent of exciton delocalization in much the same way as that in linear counterparts …