Modern Molecular PhotochemistryBenjamin/Cummings Publishing Company, 1978 - 628 páginas Inleiding tot de studie van organische fotochemische reacties |
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Página 259
... quenching of S1 = kst , [ Q ] ( 8.45 ) rate of quenching of T1 = k¶t , [ Q ] ( 8.46 ) For acetone at room temperature ( in acetonitrile as a typical " inert solvent " ) Ts ~ 2 x 109 sec and t1 ~ 50 x 10 sec . Thus : quenching of S1 ...
... quenching of S1 = kst , [ Q ] ( 8.45 ) rate of quenching of T1 = k¶t , [ Q ] ( 8.46 ) For acetone at room temperature ( in acetonitrile as a typical " inert solvent " ) Ts ~ 2 x 109 sec and t1 ~ 50 x 10 sec . Thus : quenching of S1 ...
Página 260
... quenching of S , or T1 as measured by fluores- cence and / or phosphorescence quenching . 1 As an illustration , the ketyl radicals produced via hydrogen abstraction of the n , * states of ketones may be intercepted by the commonly ...
... quenching of S , or T1 as measured by fluores- cence and / or phosphorescence quenching . 1 As an illustration , the ketyl radicals produced via hydrogen abstraction of the n , * states of ketones may be intercepted by the commonly ...
Página 318
... quenching ” —a volume of space of radius R in which effective quenching may occur about the excited molecule . If this quenching sphere contains a quencher molecule , the excited molecule is quenched with 100 % efficiency . On the other ...
... quenching ” —a volume of space of radius R in which effective quenching may occur about the excited molecule . If this quenching sphere contains a quencher molecule , the excited molecule is quenched with 100 % efficiency . On the other ...
Conteúdo
1 | 10 |
Electronic Orbitals Configurations and States | 17 |
7 | 21 |
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absorption acceptor acetone aromatic benzene benzophenone bimolecular bond carbonyl Chem chemical CIDNP collision compounds configuration conrotatory correlation diagram corresponds cyclic cycloaddition Dewar benzene dipole diradical donor efficiency electrocyclic electrocyclic reactions electron spin electronically excited emission energy transfer ethylene example excimer exciplex experimental Figure fluid solution fluorescence formation Franck-Condon hydrogen abstraction intermediate internal conversion intersystem crossing intramolecular jump k₁ kcal/mole ketones lifetime magnetic field mechanism molecular molecule naphthalene nuclear geometry nuclear motion observed occur organic molecules oscillator oxetane oxygen pathway Ph Ph phosphorescence photochemical photochemistry photocycloaddition photon Photophysics photoreactions photosensitized Phys possess processes quantum yield quencher quenching radiationless transitions radiative radical pair rate constant reactant reaction reactive rearrangement representative point result ring S₁ S₁(n S₂ sec¯¹ sec¹ sensitization singlet solvent spectroscopic spectrum spin-orbit coupling structure symmetry T₁ temperature triplet triplet-triplet Turro undergo vibrational x-cleavage Zero Order zwitterionic