Unraveling the Microscopic Origin of Triplet Lasing from Organic Solids

The Journal of Physical Chemistry Letters
Lopa PaulSwapan Chakrabarti

Abstract

We present a heuristic mechanism for the origin of the unusual triplet lasing from (E)-3-(((4-nitrophenyl)imino)methyl)-2H-thiochroman-4-olate·BF2.We demonstrate that whereas the moderate lifetime (1.03 μs) of the first triplet state (T1) prohibits triplet-triplet annihilation, the relatively faster S1 → T1 intersystem crossing and the 104 times smaller reverse intersystem crossing effectively help achieve population inversion in the T1 state. Furthermore, the triplet lasing wavelength (675 nm) for the tetramer does not overlap with the triplet-triplet absorptions wavelength, indicating that the spin-forbidden emission cross section is very large. Additionally, the almost complete absence of a vibrational progression in the vibronic phosphorescence spectrum of the monomer plays an important role in ensuring efficient triplet-state lasing from this organic material. Our results show that controlling the triplet-state lifetimes combined with lowering of the triplet-triplet absorption in the emission region and small vibronic coupling will be the key steps when designing novel organic triplet-lasing materials.

References

Aug 12, 2005·Chemical Reviews·Jacopo TomasiRoberto Cammi
Jul 21, 2006·The Journal of Physical Chemistry. B·Ji YuPaul F Barbara
Nov 8, 2008·Physical Chemistry Chemical Physics : PCCP·Jeng-Da Chai, Martin Head-Gordon
Dec 4, 2009·Accounts of Chemical Research·Yong Sheng ZhaoJiannian Yao
Nov 9, 2010·Chemical Reviews·Millicent B Smith, Josef Michl
Oct 21, 2011·The Journal of Chemical Physics·Róbert Izsák, Frank Neese
Dec 19, 2013·Physical Chemistry Chemical Physics : PCCP·Boris MinaevHans Agren
Jun 11, 2015·Physical Chemistry Chemical Physics : PCCP·Mathijs de JongFreddy T Rabouw
Aug 21, 2015·Nature Materials·A ManchonR A Duine
Oct 23, 2015·Chemical Reviews·Ju MeiBen Zhong Tang
Nov 19, 2015·Journal of the American Chemical Society·Zhenyi YuHongbing Fu
Jun 25, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jamie GibsonThomas J Penfold
Jan 31, 2017·Journal of the American Chemical Society·Yoshiaki ShojiTakanori Fukushima
Mar 3, 2017·The Journal of Physical Chemistry Letters·Lopa PaulKenneth Ruud
Apr 8, 2017·Chemical Reviews·Gleb BaryshnikovHans Ågren
Apr 18, 2017·Journal of the American Chemical Society·Zhenyi YuHongbing Fu

❮ 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.