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Phosphorescent

Figure Bl.1.3. State energy diagram for a typical organic molecule. Solid arrows show radiative transitions A absorption, F fluorescence, P phosphorescence. Dotted arrows non-radiative transitions. Figure Bl.1.3. State energy diagram for a typical organic molecule. Solid arrows show radiative transitions A absorption, F fluorescence, P phosphorescence. Dotted arrows non-radiative transitions.
Spectroscopists observed that molecules dissolved in rigid matrices gave both short-lived and long-lived emissions which were called fluorescence and phosphorescence, respectively. In 1944, Lewis and Kasha [25] proposed that molecular phosphorescence came from a triplet state and was long-lived because of the well known spin selection rule AS = 0, i.e. interactions with a light wave or with the surroundings do not readily change the spin of the electrons. [Pg.1143]

Typical singlet lifetimes are measured in nanoseconds while triplet lifetimes of organic molecules in rigid solutions are usually measured in milliseconds or even seconds. In liquid media where drfifiision is rapid the triplet states are usually quenched, often by tire nearly iibiqitoiis molecular oxygen. Because of that, phosphorescence is seldom observed in liquid solutions. In the spectroscopy of molecules the tenn fluorescence is now usually used to refer to emission from an excited singlet state and phosphorescence to emission from a triplet state, regardless of the actual lifetimes. [Pg.1143]

Zeng Y, Biczok L and Linschitz H 1992 External heavy atom induced phosphorescence emission of fullerenes the energy of triplet Cgg J. Phys. Chem. 96 5237-9... [Pg.2433]

White phosphorus is very reactive. It has an appreciable vapour pressure at room temperature and inflames in dry air at about 320 K or at even lower temperatures if finely divided. In air at room temperature it emits a faint green light called phosphorescence the reaction occurring is a complex oxidation process, but this happens only at certain partial pressures of oxygen. It is necessary, therefore, to store white phosphorus under water, unlike the less reactive red and black allotropes which do not react with air at room temperature. Both red and black phosphorus burn to form oxides when heated in air, the red form igniting at temperatures exceeding 600 K,... [Pg.211]

When exposed to sunlight or when heated in its own vapor to 250oC, it is converted to the red variety, which does not phosphoresce in air as does the white variety. This form does not ignite... [Pg.36]

On the average, one part of radon is present ot 1 x IO21 part of air. At ordinary temperatures radon is a colorless gas when cooled below the freezing point, radon exhibits a brilliant phosphorescence which becomes yellow as the temperature is lowered and orange-red at the temperature of liquid air. It has been reported that fluorine reacts with radon, forming a fluoride. Radon clathrates have also been reported. [Pg.152]

The total fluorescence (or phosphorescence) intensity is proportional to the quanta of light absorbed, To — T, and to the efficiency (f>, which is the ratio of quanta absorbed to quanta emitted ... [Pg.728]

The fraction of absorbed photons that produce a desired event, such as fluorescence or phosphorescence (4>). [Pg.425]

Phosphorescence is most favorable for molecules that have n transitions,... [Pg.426]

In an emission spectrum a fixed wavelength is used to excite the molecules, and the intensity of emitted radiation is monitored as a function of wavelength. Although a molecule has only a single excitation spectrum, it has two emission spectra, one for fluorescence and one for phosphorescence. The corresponding emission spectra for the hypothetical system in Figure 10.43 are shown in Figure 10.44. [Pg.427]

The basic design of instrumentation for monitoring molecular fluorescence and molecular phosphorescence is similar to that found for other spectroscopies. The most significant differences are discussed in the following sections. [Pg.427]

A fluorescence or phosphorescence spectrum in which the emission intensity at a fixed wavelength is measured as a function of the wavelength used for excitation. [Pg.427]

Molecular Phosphorescence Instrumentation for molecular phosphorescence must discriminate between phosphorescence and fluorescence. Since the lifetime for fluorescence is much shorter than that for phosphorescence, discrimination is easily achieved by incorporating a delay between exciting and measuring phosphorescent emission. A typical instrumental design is shown in Figure 10.46. As shown... [Pg.428]

Block diagram for molecular phosphorescence spectrometer with inset showing how choppers are used to isolate excitation and emission. [Pg.428]


See other pages where Phosphorescent is mentioned: [Pg.52]    [Pg.243]    [Pg.308]    [Pg.308]    [Pg.308]    [Pg.311]    [Pg.433]    [Pg.307]    [Pg.1143]    [Pg.1148]    [Pg.1591]    [Pg.2419]    [Pg.2948]    [Pg.126]    [Pg.2]    [Pg.50]    [Pg.50]    [Pg.51]    [Pg.105]    [Pg.105]    [Pg.728]    [Pg.729]    [Pg.373]    [Pg.423]    [Pg.424]    [Pg.424]    [Pg.424]    [Pg.424]    [Pg.424]    [Pg.426]    [Pg.426]    [Pg.426]    [Pg.427]    [Pg.427]   
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See also in sourсe #XX -- [ Pg.332 ]




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1,2-Dioxetanes phosphorescence

A brief history of fluorescence and phosphorescence

Absorption phosphorescence devices

Advantages of Fluorescence and Phosphorescence

Amino acids, aromatic, phosphorescence

Anisotropy phosphorescence

Aromatic compounds, phosphorescence

Azabenzenes, phosphorescence

Azanaphthalenes, phosphorescence

Benzene phosphorescence

Benzene phosphorescence lifetimes

Benzene phosphorescence spectra

Benzene, absorption spectrum phosphorescence

Benzophenone phosphorescence lifetime

Benzophenone, photoreduction phosphorescence

Biacetyl phosphorescence

Bimolecular phosphorescence

Blue phosphorescent dopants

Brightness phosphorescence devices

Bromonaphthalenes phosphorescence

Carbazole phosphorescence devices

Charge phosphorescence devices

Chelates phosphorescence

Chromophore phosphorescent carbonyl

Color phosphorescence devices

Colorants phosphorescent

Conjugated phosphorescence

Conjugated polymers phosphorescent polymer light-emitting

Crystal phosphorescence excitation

Crystal phosphorescence excitation spectrum

Cyclodextrins phosphorescence

Degradation phosphorescence spectroscopy

Dienones, phosphorescent

Dione phosphorescence

Disadvantages of Fluorescence and Phosphorescence

Dithiolenes phosphorescence

Donor phosphorescence

Doping phosphorescence devices

Dyes, analysis Phosphorescence

Electromagnet phosphorescence

Electronic excitation energy phosphorescence

Electronic excitation phosphorescence

Electronic spectroscopy phosphorescence

Electronic transitions phosphorescence

Emission phosphorescence

Emission phosphorescence devices

Emission phosphorescent

Emissive phosphorescence devices

Energy transfer phosphorescence

Enhancement of phosphorescence

Eosin phosphorescence

Europium complexes, phosphorescent emission

Experimental techniques phosphorescence

Film phosphorescence spectra from

Fluorescence and phosphorescence

Fluorescence and phosphorescence quenching

Fluorescence and phosphorescence spectroscopy

Fluorescence or Phosphorescence

Fluorescence phosphorescence devices

Fluorescence phosphorescence excitation

Fluorescence, Phosphorescence, and Photochemistry

Fluorescence, phosphorescence and decomposition

Fluorescence-phosphorescence detector

Fullerenes phosphorescence

G-phosphorescence

General Considerations of Phosphorescence Yield

Green phosphorescent dopants

Highest phosphorescence devices

Hole phosphorescence devices

Hydrocarbons, aromatic phosphorescence emissions

INDEX phosphorescence

In fluorescence and phosphorescence

Instrumentation for Fluorescence and Phosphorescence

Intensity of phosphorescence

Interactions Involving Triplet State and Phosphorescence

Interactions phosphorescence

Interactions triplet states/phosphorescence

Intersystem Crossing, Phosphorescence, and Delayed Fluorescence

Ir phosphorescent emission, molecular

Kasha phosphorescence

Labeling, labels phosphorescent

Lanthanide complexes, phosphorescent

Lanthanide complexes, phosphorescent emission, molecular glasses

Lanthanide ions phosphorescence

Lanthanide phosphorescence

Lanthanide phosphorescence, antenna

Layers phosphorescence

Lifetime phosphorescence

Ligand field phosphorescence

Ligand phosphorescence

Light phosphorescence

Light scattering phosphorescence

Liquid phosphorescence

Long lasting phosphorescence

Low-temperature phosphorescence

Luminescence Phosphorescence

Luminescence fluorescence and phosphorescence

Luminescence phosphorescence devices

Luminescence phosphorescence quantum yield

Luminescence phosphorescence spectra

Measurement of emission characteristics fluorescence, phosphorescence and chemiluminescence

Mechanism, photochemical phosphorescence

Metal-centered phosphorescent

Metal-centered phosphorescent emission

Metal-enhanced phosphorescence

Metalloporphyrins phosphorescence, quenching

Methyl phosphorescence devices

Micelles phosphorescence

Microwave-induced delayed phosphorescence

Molecular Fluorescence and Phosphorescence Spectra

Molecular phosphorescence

Monomolecular phosphorescence

Naphthalene phosphorescence

OLEDs-phosphorescent

Optical properties, spectroscopy phosphorescence

Optically detected magnetic resonance phosphorescence

Phenoxazine, phosphorescent emission

Phosphoranes Phosphorescence

Phosphoresce

Phosphoresce

Phosphorescence

Phosphorescence

Phosphorescence Anisotropy Decays

Phosphorescence Excitation Spectroscopy

Phosphorescence Quenching by External Molecules

Phosphorescence Spectroscopy of Some Organic Compounds

Phosphorescence The emission

Phosphorescence advantages relative

Phosphorescence amorphous materials

Phosphorescence amplitude modulated

Phosphorescence and Delayed Fluorescence from Solutions (Parker)

Phosphorescence antenna effect

Phosphorescence aromatic

Phosphorescence associated problem

Phosphorescence autoxidations

Phosphorescence band blue shift

Phosphorescence bands

Phosphorescence characteristics

Phosphorescence color tuning

Phosphorescence colors, anionic

Phosphorescence colors, anionic complexes

Phosphorescence decay

Phosphorescence decay double resonance

Phosphorescence decay rate

Phosphorescence decay-time

Phosphorescence definition

Phosphorescence depolarization

Phosphorescence detection limits

Phosphorescence devices

Phosphorescence dissolved molecular oxygen quenching

Phosphorescence effect

Phosphorescence emission efficiency

Phosphorescence emission laser-induced

Phosphorescence emission quenching

Phosphorescence emission zeolites

Phosphorescence energy diagram

Phosphorescence enhancement

Phosphorescence excitation

Phosphorescence excitation spectrum

Phosphorescence from films

Phosphorescence from metalloporphyrins

Phosphorescence history

Phosphorescence implications

Phosphorescence in Aromatic Molecules with Nonbonding Electrons

Phosphorescence in solution

Phosphorescence indicators

Phosphorescence indicators, inorganic

Phosphorescence intensity

Phosphorescence lifetime and spectra

Phosphorescence lifetime data

Phosphorescence lifetimes for

Phosphorescence lifetimes temperature-dependent

Phosphorescence light sources

Phosphorescence liquid crystals

Phosphorescence luminescent conjugated polymers

Phosphorescence measurement

Phosphorescence methods

Phosphorescence microscope

Phosphorescence microwave double

Phosphorescence minerals

Phosphorescence natural, organic compounds with

Phosphorescence of 2,4,6-tribromophenylazide

Phosphorescence of Aromatic Compounds

Phosphorescence of Proteins

Phosphorescence of benzophenone

Phosphorescence of naphthalene

Phosphorescence of phosphorus

Phosphorescence oxygen probes

Phosphorescence photoelectron spectroscopy

Phosphorescence photoisomerization

Phosphorescence physical properties

Phosphorescence polarization

Phosphorescence polarization spectrum

Phosphorescence poly

Phosphorescence polyolefins

Phosphorescence polystyrene

Phosphorescence process

Phosphorescence proteins

Phosphorescence proton acidity

Phosphorescence protonation

Phosphorescence quantum

Phosphorescence quantum efficiency

Phosphorescence quantum yield

Phosphorescence quantum yield values

Phosphorescence quenching

Phosphorescence quenching, correlation

Phosphorescence radiation

Phosphorescence radiative deactivation

Phosphorescence rate efficiency

Phosphorescence reduced system

Phosphorescence refraction index

Phosphorescence relative positions

Phosphorescence resonance

Phosphorescence self-quenching

Phosphorescence sensitized

Phosphorescence sensor

Phosphorescence spectra

Phosphorescence spectra of 1,5-naphthyridines

Phosphorescence spectra, transition-metal

Phosphorescence spectroscop

Phosphorescence spectroscopy

Phosphorescence spectroscopy instrumentation

Phosphorescence spectroscopy molecular

Phosphorescence spectroscopy spectra

Phosphorescence spectroscopy time-resolved

Phosphorescence spectrum anthracene

Phosphorescence spectrum, basis

Phosphorescence spin-forbidden

Phosphorescence studies

Phosphorescence substitution effects

Phosphorescence temperature sensitivity

Phosphorescence theory

Phosphorescence thermal stability

Phosphorescence time dependance

Phosphorescence time dependence

Phosphorescence time scale

Phosphorescence triplet state

Phosphorescence ultraviolet absorption

Phosphorescence versus non-radiative de-excitation

Phosphorescence viscosity

Phosphorescence yield

Phosphorescence, analytical method

Phosphorescence, analytical method Applications

Phosphorescence, hydration

Phosphorescence, liver alcohol dehydrogenase

Phosphorescence, monitoring triplet state

Phosphorescence, monitoring triplet state population

Phosphorescence, of benzene

Phosphorescence, of biacetyl

Phosphorescence, of singlet oxygen

Phosphorescence-Microwave Multiple Resonance Spectroscopy (El-Sayed)

Phosphorescence-based sensors

Phosphorescent OLED device

Phosphorescent OLED device architecture

Phosphorescent OLED device blue triplet

Phosphorescent OLED device drive voltage

Phosphorescent OLED device emission mechanism

Phosphorescent OLED device energy levels

Phosphorescent OLED device green triplet

Phosphorescent OLED device high-energy efficiency

Phosphorescent OLED device layer structure

Phosphorescent OLED device lifetime

Phosphorescent OLED device material structure

Phosphorescent OLED device triplet energy

Phosphorescent OLED technology

Phosphorescent OLEDs, white

Phosphorescent Organic Molecules

Phosphorescent PLEDs

Phosphorescent blue dopant

Phosphorescent chemosensors

Phosphorescent compounds, chemical

Phosphorescent compounds, chemical structures

Phosphorescent dendrimers

Phosphorescent dopants

Phosphorescent dyes

Phosphorescent emitters

Phosphorescent energy

Phosphorescent green dopant

Phosphorescent inks

Phosphorescent light

Phosphorescent materials

Phosphorescent optical light emitting diodes

Phosphorescent organic light-emitting diodes

Phosphorescent organic light-emitting diodes PhOLEDs)

Phosphorescent paper

Phosphorescent photoinduced electron

Phosphorescent photophysical parameters

Phosphorescent pigment

Phosphorescent platinum

Phosphorescent platinum porphyrin

Phosphorescent polymer light-emitting

Phosphorescent polymer light-emitting diodes

Phosphorescent polymer light-emitting materials

Phosphorescent probe molecules

Phosphorescent probes

Phosphorescent processes

Phosphorescent quenching

Phosphorescent small molecules

Phosphorescent substances

Phosphors phosphorescence

Photochemical reactions phosphorescence

Photochemistry phosphorescence

Photoemission phosphorescence

Photoluminescence Fluorescence and Phosphorescence

Photoluminescence, Phosphorescent and Fluorescent Materials

Photophysical processes Fluorescence and phosphorescence

Platinum complexes, phosphorescent emission

Platinum complexes, phosphorescent emission light to current applications

Platinum complexes, phosphorescent emission w-heterojunction devices, molecular glasses

Platinum phosphorescence

Poly , phosphorescence excitation spectra

Poly based phosphorescence devices

Poly phosphorescence devices

Poly phosphorescence excitation

Polyfluorenes phosphorescence devices

Porphyrins phosphorescence, quenching

Pyrene phosphorescence emission

Quantum phosphorescence devices

Quantum yields of phosphorescence

Quenching phosphorescence devices

Radiolysis phosphorescence

Rate constant of phosphorescence

Rate constant phosphorescence

Recombination phosphorescence devices

Red phosphorescent dopants

Reference Standards for the Determination of Phosphorescence Quantum Yields

Room-temperature Phosphorescence (RTP)

Room-temperature phosphorescence

Room-temperature phosphorescence spectrum

Sensitized phosphorescence yield

Sensors phosphorescence quenching

Singlet oxygen phosphorescence

Special Topic 3.3 Phosphorescence excitation spectra

Spectra fluorescence and phosphorescence

Spectrophotometry phosphorescence

Spontaneous emission phosphorescent

Stilbenes phosphorescence properties

Structured phosphorescence

Temperature phosphorescence semiconductor

Term phosphorescence

The Phosphorescence Excitation Method

Time- resolved phosphorescence spectra

Time-dependent phosphorescence anisotropy

Time-dependent phosphorescence spectra

Time-resolved fluorescence and phosphorescence spectroscopy

Time-resolved phosphorescence

Time-resolved phosphorescence anisotropy

Trapping phosphorescence devices

Triplet phosphorescence devices

Triplet-state probes phosphorescence

Tryptophan Phosphorescence Emission from Proteins

Tryptophan Phosphorescence in Proteins

Tryptophan phosphorescence

Tryptophan phosphorescence spectra

Uranium phosphorescence experiments

Wavelength phosphorescence

What Affects the Phosphorescence Lifetime

White phosphorescent organic light-emitting

White phosphorescent organic light-emitting diodes

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