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IUPAC Compendium of Chemical Terminology

 

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M]
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pi-pi* state
pi-pi* transition
pi-complex
P, M
packed column (in chromatography)
packing (in column chromatography)
paddlanes
pair attenuation coefficient (in nuclear chemistry)
pair correlation length (in thin films),
pair production (in nuclear chemistry)
Pallmann effect
PAN-based carbon fibres
paraffin
parallel-chain crystal (in polymers)
parallel reactions
paramagnetic
parent hydride
parent ion (in mass spectrometry)
Pariser-Parr-Pople (PPP) method
partial anodic (cathodic) current
partial charge exchange reaction
partial charge transfer reaction
partial decay constant (in nuclear chemistry)
partial digestion (in spectrochemical analysis)
partial isotherm (or individual isotherm) (in surface chemistry)
partial kinetic current (in electrochemistry)
partial least squares (PLS)
partially draining
partial mass density
partial microscopic diffusion control (encounter control)
partial molar Gibbs energy
partial molar quantity
partial order of reaction
partial pressure
partial rate factor
partial specific volume
particle concentration (in atmospheric chemistry)
particle density (in nuclear chemistry)
particle induced X-ray emission analysis
particle scattering factor
particle scattering function
particle size (in atmospheric chemistry)
particle size distribution (in atmospheric chemistry)
particular property
particulate carbon
particulate matter (in atmospheric chemistry)
partition
partition chromatography
partition coefficient
partition constant
partition function
partition isotherm (in chromatography)
partition ratio
partly open film
pascal
passivation (in electrochemical corrosion)
passivation potential (in electrochemical corrosion)
passive metal
passive sampler
passive state (in electrochemical corrosion)
Paterno-Buchi reaction
pattern recognition
paucidisperse system
Pauli exclusion principle
PDMR
peak (in chromatography)
peak analysis
peak area (in chromatography)
peak area method
peak base (in chromatography)
peak concentration (trace atmospheric component)
peak current
peak elution volume (time) (in column chromatography),
peak enthalpimetry
peak fitting
peak height (in chromatography)
peak maximum (in chromatography)
peak potential
peak resolution (in chromatography), Rs
peak widths (in chromatography)
pectins
Peierls transition
pellicular packing (in chromatography)
penams
pendant chain
pendant group (side group)
penems
penetrant (permeant)
penetration depth
penicillins
Penning gas mixture
pentads (in polymers)
pentaprismo-
peptides
peptidoglycan
peptization (in colloid chemistry)
per acids
percent
percentage error
percentage exposed (in metallic catalysts)
percentage relative error
percentage standard deviation
percent diastereoisomer excess
percent enantiomer excess
perfectly polarized interphase
perfusion stationary phase (material) (in liquid chromatography)
pericyclic reaction
perikinetic aggregation (in colloids)
period, T
periodic copolymer
periodic copolymerization
periodic voltage
peripheral atom (in organic reaction mechanisms)
periplanar
periselectivity
peritectic reaction
peritectoid reaction
peritectoid temperature
permeability, mu
permeability of vacuum
permeate
permeation chromatography
permeation tube
permittivity, epsilon
permittivity of vacuum
permselectivity
peroxides
peroxisome
peroxo compounds
peroxy acids
perpendicular effect
persistence length (in polymers)
persistent
perspective formula
perstraction
perturbation theory
perturbed dimensions (in polymers)
pervaporation
pesticide
pesticide residue
peta
petroleum coke
petroleum pitch
pH
pH0.5 or pH1/2 (in solvent extraction)
pharmacodynamics
pharmacokinetics (1993, 65, 2082)
pharmacokinetics (2004, 76, 1064)
phase
phase domain
phase I reaction (of biotransformation)
phase II reaction (of biotransformation)
phase interaction
phase fluorimetry
phase inversion
phase ratio (in chromatography),
phase ratio (in liquid-liquid distribution), r
phase rule
phase separation
phase-space theory
phase-transfer catalysis
phase transition
phenolates
phenols
phenomenological equation
phenonium ions
phenotype
phenoxides
pheromone
pH glass electrode
pH gradient (in electrophoresis)
phonon
phosphanes
phosphanylidenes
phosphatidic acids
phosphazenes
phosphine oxides
phosphines
phosphinic acids
phosphinidenes
phosphinous acids
phospho
phosphoglycerides
phospholipids
phosphonic acids
phosphonitriles
phosphonium compounds
phosphonium ylides
phosphono
phosphonous acids
phosphoramides
phosphoranes
phosphoranyl radicals
phosphorescence
phosphorimetry
phosphoroscope
phosphorus ylides
phosphorylation
phosphylenes
photoacoustic detector
photoacoustic effect
photoacoustic spectroscopy
photoadsorption
photoaffinity labelling
photoassisted catalysis
photocatalysis
photocatalytic cell
photochemical detector
photochemical equivalence
photochemical hole burning
photochemical reaction
photochemical smog
photochemical yield
photochemistry
photochromism
photoconductive detector
photoconductivity
photocrosslinking
photocuring
photocurrent yield
photodegradation
photodesorption
photodetachment (of electrons)
photodiode
photodiode array
photodynamic effect
photo-elastic polymer
photoelectrical effect
photoelectric attenuation coefficient
photoelectric detector
photoelectric peak
photoelectrochemical cell
photoelectrochemical etching
photoelectrochemistry
photoelectrolytic cell
photoelectron spectroscopy (PES)
photoelectron yield
photoemissive detector
photoexcitation
photo-Fries rearrangement
photogalvanic cell
photoimaging
photoinduced electron transfer
photoinduced polymerization
photoinitiation
photoionization
photoionization detector (in gas chromatography)
photoisomerization
photoluminescence
photoluminescent polymer
photolysis
photometry
photomultiplier tube
photon
photon activation
photon counting
photon emittance
photon exitance
photon exposure
photon flow
photon fluence
photon fluence rate
photon flux
photon irradiance
photon quantities
photon radiance
photooxidation
photooxygenation
photopeak
photophoresis
photophosphorylation
photophysical processes
photopolymerization
photoreaction
photoreduction
photoresist
photosensitive polymer
photosensitization
photosensitizer
photostationary state
photosynthesis
photosystem
photothermal effect
photothermography
phototransistor
photovoltaic cell
pH-rate profile
pH standard
phthaleins
phthalides
physical adsorption
physical network
physical quantity (measurable quantity)
physisorption (physical adsorption)
phytotoxicant
pico
picrates
piezoelectric polymer
piezoluminescence
pile-up (in radioanalytical chemistry)
pinacols
pinocytosis
PIN (p-intrinsic-n) diode
PIN semiconductor detector
pitch
pitch-based carbon fibres
pitting corrosion
Pitzer strain
planar chirality
planar chromatography
planar film
planar stereoisomerism
Planck constant
plane angle
plasma (in biology) (2004, 76, 1065)
plasma (in spectrochemistry) (O.B. 119)
plasma desorption ionization (in mass spectrometry)
plasmid
plastic flow
plastic transition
plateau border (in surface chemistry)
plate height (in chromatography), Heff
plate number (in chromatography), N
pleiotropic gene
ploidy
plug-flow (in catalysis)
plumbylenes
plumbylidenes
plume (in atmospheric chemistry)
plus, minus
pneumatic detector
point group
point of zero charge (p.z.c.)
poise
poison (in catalysis)
Poisson distribution
polar aprotic solvent
polar effect
polarity
polarizability
polarization
polarization (in electrochemistry),
polarization error (in spectrochemical analysis)
polarized interphases
polarography
polar solvent
pollution (pollutant)
pollution rose
polyacid
polyaddition
polyampholyte
polybase
polybetaine
polychromator
polycondensation
polycrystalline graphite
polycyclic system
polydent
polydisperse medium
polydisperse polymer
polyelectrolyte (1972, 31, 607; see also 1996, 68, 2304)
polyelectrolyte (2004, 76, 901)
polyelectrolyte (2006, 78, 2072)
polyelectrolyte complex
polyelectrolyte network
polyfunctional catalysis
polygranular carbon
polygranular graphite
polyhedral symbol
polyhedranes
polyions
polyketides
polymer
polymerase chain reaction (PCR)
polymer alloy
polymer blend 1996, 68, 2305
polymer blend 2004, 76, 1987 (This supersedes an earlier definition)
polymer catalyst
polymer compatibilizer
polymer crystal
polymer crystallite
polymer cyclization
polymer drug
polymer electrolyte
polymer gel
polymeric
polymeric electrolyte
polymeric inner salt
polymeric stationary phase (material) (in liquid chromatography)
polymerization
polymer complexation
polymer composite
polymer degradation
polymer functionalization
polymer membrane
polymer-metal complex
polymer molecule
polymer network
polymer phase-transfer catalyst
polymer-polymer complex 1996, 68, 2305
polymer-polymer complex 2004, 76, 1988
polymer-poor phase
polymer reactant
polymer reaction
polymer-rich phase
polymer solvent
polymer-solvent interaction
polymer sorbent
polymer support
polymer-supported catalyst
polymer-supported reaction
polymer surfactant
polymolecularity correction
polymorphic transition
polypeptides
polyprenols
polyquinanes (polyquinenes)
polysaccharides
polysulfanes
polysulfides
polytopal rearrangement
polytypic transition
pooled relative standard deviation
pooled standard deviation
population inversion
pore size distribution
Porod-Kratky chain (in polymers)
porosity
porous-layer open-tabular (PLOT) column (in chromatography)
porphyrinogens
porphyrins
position-sensitive photomultiplier tube
positive feedback
positive ion (in mass spectrometry)
positron
positronium
post-column derivatization (in chromatography)
post-filter effect (in luminescence spectroscopy)
postprecipitation
potential at the point of zero charge (p.z.c.)
potential-determining (p.d.) ions
potential energy
potential-energy profile
potential-energy (reaction) surface
potential of a cell reaction
potential temperature
potentiation
potentiometer
potentiometric detection method (in electrochemical analysis)
potentiometric selectivity coefficient
power, P
power level
pre-association
precipitation
precipitation fractionation (of polymers)
precipitation from homogeneous solution (pfhs) (in analysis)
precipitation titration
precision
precision (of a balance)
precision (of a weighing)
precision of indication (of a balance)
preconcentration (in trace analysis)
preconcentration coefficient (of a microcomponent in trace analysis)
precursor (in radioanalytical chemistry)
precursor complex
precursor ion (in mass spectrometry)
predissociation
pre-equilibrium (in solvent extraction)
pre-equilibrium (prior equilibrium)
pre-exponential factor, A
preferential sorption (in polymers)
pre-filter effect (in luminescence spectroscopy)
premium coke
premix burner (in flame spectroscopy)
prenols
pre-polymer (1996, 68, 2304)
prepolymer (2004, 76, 897)
pre-polymer molecule
prepreg
pre-reactive complexes
pressure, p
pressure flow
pressure gradient correction factor (in gas chromatography)
pressure-induced transition
pressure jump
pressure-sensitive detector
pretreatment (of a catalyst)
primary crystallization
primary current distribution
primary electrons (pe) (in in situ microanalysis)
primary excitation (of X-rays)
primary isotope effect
primary kinetic electrolyte effect
primary kinetic isotope effect
primary mixture
primary particle (in catalysis)
primary photochemical process (primary photoreaction)
primary pH standards
primary pollutant (in atmospheric chemistry)
primary (photo)process
primary (photo)product
primary sample
primary standard
primary structure
primary structure (of a segment of a polypeptide)
primitive change
principal group
principal ion (in mass spectrometry)
principal moments of inertia
principle of least nuclear motion
principle of microscopic reversibility
principle of minimum structural change
prior distribution
prior equilibrium
priority
probability, P
probability density, P
probe (in biotechnology)
process
prochirality
prochirality centre
product
product-determining step
product development control
product ion
productivity (in biotechnology), r
product state distribution
pro-E, pro-Z
progenitor ion (in mass spectrometry)
program
programmed-flow chromatography (flow programming)
programmed-pressure chromatography (pressure programming)
programmed-temperature chromatography (temperature programming)
projection formula
prolate trochoidal mass spectrometer
promoter (gene technology)
promoter (in catalysis)
promotion
prompt coincidence
prompt neutrons
propagating reaction
propagation
propellanes
property
prophage
proportional counter
proportional counter tube
proportional gas-scintillation counter
proprochirality
pro-R, pro-S
pros (in histidine nomenclature)
prostaglandins
prostanoids
prosthetic group
proteases
protected lyophobic colloid
protection of a reactive group
protective action (in colloid chemistry)
protein engineering
proteins
proteoglycan
proteome
protic
protide
protio
protium
protogenic (solvent)
protolysis
proton
proton affinity
protonated molecule (in mass spectrometry)
protonation constant
proton charge
proton magnetic moment
proton magnetogyric ratio
proton number
proton rest mass
proton transfer reaction
protophilic (solvent)
protoplast
prototrophs
prototropic rearrangement (or prototropy)
pseudo acids
pseudo-asymmetric carbon atom
pseudo-axial
pseudo bases
pseudo-catalysis
pseudo-co-oligomer
pseudo-copolymer
pseudo-equatorial
pseudo-first-order rate coefficient
pseudo-first-order reaction
pseudohalogens
pseudomolecular rearrangement
pseudopericyclic
pseudo rate constant
pseudorotation
pseudo-unimolecular
pseudoureas
pseudo-zero-order reaction
psychosine
psychrometric hygrometer
psychrometry
puffing
puffing inhibitor
pulsatance
pulse amplitude analyser
pulse amplitude selector
pulse duration (in electroanalytical chemistry)
pulse height analyser
pulse reactor (in catalysis)
pump-probe technique
purine bases
pyramidal inversion
pyranoses
pyrimidine bases
pyro
pyroelectric detector
pyrolysis
pyrolysis-gas chromatography
pyrolytic carbon
pyrolytic graphite
pyrromethenes

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