Excitation energy migration processes in various multi-porphyrin assemblies

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
Jaesung Yang, Dongho Kim

Abstract

The electronic interactions and excitation energy transfer (EET) processes of a variety of multi-porphyrin arrays with linear, cyclic and box architectures have been explored. Directly meso-meso linked linear arrays (Z(N)) exhibit strong excitonic coupling with an exciton coherence length of approximately 6 porphyrin units, while fused linear arrays (T(N)) exhibit extensive π-conjugation over the whole array. The excitonic coherence length in directly linked cyclic porphyrin rings (CZ(N)) was determined to be approximately 2.7 porphyrin units by simultaneous analysis of fluorescence intensities and lifetimes at the single-molecule level. By performing transient absorption (TA) and TA anisotropy decay measurements, the EET rates in m-phenylene linked cyclic porphyrin wheels C12ZA and C24ZB were determined to be 4 and 36 ps(-1), respectively. With increasing the size of C(N)ZA, the EET efficiencies decrease owing to the structural distortions that produce considerable non-radiative decay pathways. Finally, the EET rates of self-assembled porphyrin boxes consisting of directly linked diporphyrins, B1A, B2A and B3A, are 48, 98 and 361 ps(-1), respectively. The EET rates of porphyrin boxes consisting of alkynylene-bridged diporphyri...Continue Reading

References

Jan 5, 2002·Journal of the American Chemical Society·Uta Wille
Dec 6, 2002·Journal of the American Chemical Society·Hyun Sun ChoAtsuhiro Osuka
Dec 13, 2003·Science·Aleksander W RoszakRichard J Cogdell
Jan 8, 2004·Journal of the American Chemical Society·Kentaro TakadaNobuhiro Fusetani
Apr 9, 2004·Journal of the American Chemical Society·Xiaobin PengAtsuhiro Osuka
Jan 6, 2005·Journal of the American Chemical Society·Yasuyuki NakamuraAtsuhiro Osuka
Jan 10, 2006·Chemistry : a European Journal·Takaaki HoriAtsuhiro Osuka
Jul 21, 2006·The Journal of Physical Chemistry. B·In-Wook HwangAtsuhiro Osuka
Mar 8, 2007·Journal of the American Chemical Society·Mira ParkDongho Kim
Nov 3, 2007·The Journal of Physical Chemistry. a·A Kimura, T Kakitani
Nov 7, 2007·Chemistry : a European Journal·Takaaki HoriAtsuhiro Osuka
Jan 19, 2008·Journal of the American Chemical Society·Jaesung YangDongho Kim
Jan 13, 2009·Journal of the American Chemical Society·Hyejin YooDongho Kim

❮ Previous
Next ❯

Citations

Jul 4, 2012·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Alexandra Olaya-CastroGraham R Fleming
Sep 24, 2016·The Journal of Physical Chemistry. a·Judah S HighElena Jakubikova
Aug 24, 2017·Physical Chemistry Chemical Physics : PCCP·Di GaoPierre D Harvey
Jul 22, 2014·Chemistry : a European Journal·Stéphanie DurotBarbara Ventura

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.