Spectra of the Metallo-derivatives of α,β,γ,δ-Tetraphenylporphine

Dorough, G. D.; Miller, J. R.; Huennekens, F.M.

doi:10.1021/ja01153a085

Cited by 374 publications

(169 citation statements)

References 0 publications

Supporting

Mentioning

158

Contrasting

Unclassified

Order By: Relevance

“…This state may relax within a very short time (-10-l 2 s) to a vibrationally thermalized state (D' A -) in which, however, the surrounding solvent molecules retain the orientations they possessed in the complex (D* A). We assume that if U"' > 0 the density of "Franck-Condon states" (D+ A-)Fc is great enough to assure quick electron transfer with disposal of the excess energy into vibrational modes (Efrima and Bixon, 1974). There has been a considerable effort to establish an adequate theoretical accounting for the rate of transfer of an electron to form the state (D' A-h;,, based usually on the theory of Marcus (1956Marcus ( , 1963Marcus ( , 1968 and its extensions (Van Duyne and Fischer, 1974), or on the concept of tunneling (e.g.…”

Section: D* + a + D + + A -(7)mentioning

confidence: 99%

The Energetics of Electron‐transfer Reactions of Chlorophyll and Other Compounds*

Seely

1978

Photochem & Photobiology

163

View full text Add to dashboard Cite

Abstract-Quite often the primary photochemical reaction of an excited state molecule is transfer of an electron to or from another molecule in its ground state. Rates of such reactions are closely dependent on differences between ground and excited state redox potentials of the reagents. The solvent also plays an important role in stabilizing ion pairs formed by the electron transfer. This Review discusses experimental data relating rates to electrochemical energy parameters in the context of a scheme which portrays the energy and electron transactions in a unified manner. Three consequences of reaction of a singlet excited state are distinguished: (Sl) quenching without detectable products, (S2) exciplex fluorescence, (S3) transient radical ion production, and energetically necessary conditions are derived for each. Similarly, four kinds of reactions involving the triplet state are distinguished, which depend on the relation between the energy of the triplet state and that of the ion pair states: (TI) rapid quenching, (T2) slow quenching, (T3) accelerated intersystem crossing and (T4) generation by reaction between radical ions 'of like spin. The last may be followed by electrochemiluminescence. Classes of compounds for which data are available include chlorophylls, porphyrins and a few other molecules of biological interest, aromatic hydrocarbons and their derivatives, heterocyclic systems, carbonyl compounds, dyes, and complexes of Ru and U. A Table compiling median or selected values of ground and excited state electrochemical potentials of chlorophylls, some porphyrins, and a few other compounds is presented.

show abstract

Section: D* + a + D + + A -(7)mentioning

confidence: 99%

The Energetics of Electron‐transfer Reactions of Chlorophyll and Other Compounds*

Seely

1978

Photochem & Photobiology

163

View full text Add to dashboard Cite

show abstract

“…Les a,P,y,G-tCtraculaire active et le mktal. L70uverture du cycle ~h C n~l~o r~h~r i n e s mktallkes ne prksentent Pas de oxiranne ou thiiranne se produit dans ce cas presque phCnomkne d'autoassociation, posddent un spectre exclusivement entre le secondaire et 1'h~-d'absorption dans le visible caractkristique (4) et sont tkroatome; elle conserve la configuration absolue donc des composCs modkles particuli6rement pratidu carbone asymCtrique de l'htterocycle. 11 est qUeS !…”

Section: Introductionunclassified

Etude des interactions des oxirannes et thiirannes avec les α,β,γ,δ-tétraphénylporphyrines au cadmium, zinc et magnésium

Dumas¹,

Guérin²

1978

Can. J. Chem.

View full text Add to dashboard Cite

Etude des interactions des oxirannes et thiirannes avec les Chem. 56,925 (1978). Les a,p,y,6-tktraphenylporphyrines au cadmium, zinc et magnesium forment avec les oxirannes et les thiirannes des complexes 1 : 1. Les valeurs relatives des constantes de complexation sont en accord avec la theorie des acides et bases "durs et mous".Les a,p,y,6-tetraphCnylporphyrines au cadmium, zinc et magnesium sont dCmCtallees par les thiols. Celle au cadmium peut rCagir avec des hetCrocycles soufres posskdant un hydrogene en p du soufre pour donner la porphyrine libre et un thiolate de cadmium. Lorsque cet hCtCrocycle est le methylthiiranne, I'organocadmien ainsi form6 est susceptible d'amorcer in siru la polymerisation stertospCcifique de cet hkterocycle.PHILIPPE DUMAS and PHILIPPE GUERIN. Can. J. Chem. 56,925 (1978). 111 adducts from oxiranes or thiiranes and cadmium, zinc, or magnesium a,p,y,6-mesotetraphenylporphyrins were obtained in benzene and complexation constants determined. Results agree with the theory of 'hard and soft' acids and bases.Demetallation of the metaloporphyrins of Cd, Zn, and Mg is achieved with thiols. The cadmium porphyrin reacts with sulfur heterocycles which contain a P hydrogen to yield the free porphyrin and a thiolate of cadmium. If this heterocycle is methylthiirane, the organocadmium compound formed may initiate the subsequent in siru stereospecific polymerization of methylthiirane.

show abstract

“…Except when specified, other chemicals were of analytical reagent grade, and used without further purification. Tetraphenylporphine (TPPH2) was synthesized by Adler's method, 30 31 and checked by elementary analysis, UV-Vis spectroscopy and IR spectra. The synthesis of [Mn(pMe)TPP]2O was reported elsewhere.…”

Section: Reagentsmentioning

confidence: 99%

A Highly Selective Potentiometric Sensor of Molybdate Based on a m-Oxo-bridged Manganeseporphyrin Dimer

et al. 2006

View full text Add to dashboard Cite

show abstract

Spectra of the Metallo-derivatives of α,β,γ,δ-Tetraphenylporphine

Cited by 374 publications

References 0 publications

The Energetics of Electron‐transfer Reactions of Chlorophyll and Other Compounds*

The Energetics of Electron‐transfer Reactions of Chlorophyll and Other Compounds*

Etude des interactions des oxirannes et thiirannes avec les α,β,γ,δ-tétraphénylporphyrines au cadmium, zinc et magnésium

A Highly Selective Potentiometric Sensor of Molybdate Based on a m-Oxo-bridged Manganeseporphyrin Dimer

Contact Info

Product

Resources

About