triplet state


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trip·let state

a second excited state of a molecule (for example, chlorophyll) produced by absorption of light to produce the singlet state, then loss of some energy (fluorescence) to achieve the longer-lasting triplet state The molecule may remain sufficiently long in the triplet state for a second activating light quantum to be effective in producing a "second triplet" state, at a still-higher level of excitation, hence reactivity. Alternatively, the molecule may lose the triplet state energy directly and return to the ground state.
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In Type-II reaction, the excited- state molecule reacts directly with 3O2 to generate highly toxic triplet state oxygen (1O2) [1, 3].
Since orthohelium is trapped in the excited triplet state, it has an opportunity to once again react with hydrogen, as displayed in the lower portion of Fig.
The phosphorescence spectra of ketones with an n-[pi]* nature of the lowest triplet state are usually structured due to the vibrational progression of the C=0 vibration, and [pi]-[pi]* triplets are mostly unstructured.
The result of excitation is that the sensitizer moves from an electronic ground state to a triplet state that then interacts with microbial components to generate cytotoxic species.
The radiative and non radiative relaxation of the triplet state are represented by [k.
Through the discovery of phosphorescent diodes, those triplet states are light-generating instead of heat-generating.
The presence of oxygen influences the outcome of a photochemical reaction, oxygen being a very good radical and triplet state quencher.
Photo-induced generation of the excited triplet state triggers an intramolecular rearrangement and elimination of the acyl group (Fig.
The state in which the spins are antiparallel is called the singlet state, and the one in which the spins are parallel is called the triplet state.
Orientational blinking ensures single emitter localization via a combination of polarization sensitive excitation, detection and stimulated depletion and triplet state shelving.
Since the Pauli exclusion principle for identical particles forbids the interaction of two neutrons in the triplet state, the cross section [[sigma].
Then, as in OPE-PDT, the excited molecule can undergo intersystem crossing into its triplet state from which the PDT effect occurs.