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Fluorescence microscopy relies upon fluorescent compounds, or fluorophores, in order to image biological systems.Since fluorescence and phosphorescence are competitive methods of relaxation, a fluorophore that undergoes intersystem crossing to the triplet excited state no longer fluoresces and instead remains in the triplet excited state, which has a relatively long lifetime, before ...
A Jablonski diagram showing the excitation of molecule A to its singlet excited state (1 A*) followed by intersystem crossing to the triplet state (3 A) that relaxes to the ground state by phosphorescence. It was used to describe absorption and emission of light by fluorescents.
Jablonski diagram indicating intersystem crossing (left) and internal conversion (right). Internal conversion is a transition from a higher to a lower electronic state in a molecule or atom. [ 1 ] It is sometimes called "radiationless de-excitation", because no photons are emitted.
Singlet fission is a spin-allowed process, unique to molecular photophysics, whereby one singlet excited state is converted into two triplet states.The phenomenon has been observed in molecular crystals, aggregates, disordered thin films, and covalently-linked dimers, where the chromophores are oriented such that the electronic coupling between singlet and the double triplet states is large.
Which is it then: "Intersystem crossing is a radiationless process involving a..." vs "The radiative decay /.../ phosphorescence is another manifestation of intersystem crossing"? — Preceding unsigned comment added by 84.250.10.117 15:01, 20 January 2013 (UTC)
The southern end of the Hải Vân Tunnel. The Hải Vân Tunnel, the second longest tunnel in Southeast Asia (after Singapore's 12.46 km (7.7 mi) long Kallang-Paya Lebar-Marina Central Expressway tunnel) and the longest in Vietnam at 6.28 km (3.90 mi), lies on Highway 1 between the two cities of Da Nang and Huế in central Vietnam.
Map of ancient Asia shows location of the Âu Việt state of Nam Cương and other Viet’s kingdoms. According to folklore, prior to Chinese domination of northern and north-central Vietnam, the region was ruled by a series of kingdoms called Văn Lang with a hierarchical government, headed by Lạc Kings ( Hùng Kings ), who were served by ...
On Earth We're Briefly Gorgeous is the debut novel by Vietnamese American poet Ocean Vuong, published by Penguin Press on June 4, 2019. [1] An epistolary novel, it is written in the form of a letter from a Vietnamese American son to his illiterate mother.