One‐ and Two‐Photon‐Induced Photochemistry of Modified Palladium Porphyrazines Involving Molecular Oxygen

Freyer, Wolfgang; Stiel, H.; Hild, Markus; Teuchner, Klaus; Leupold, D.

doi:10.1111/j.1751-1097.1997.tb03195.x

Cited by 40 publications

(23 citation statements)

References 40 publications

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“…The simultaneously interacting probe light was realized by broadband dye laser pulses. Details of this experimental arrangement are described elsewhere [21]. A typical DOD spectrum is shown in Fig.…”

Section: Size Enhancement Of Transition Dipoles To One-and Two-excitomentioning

confidence: 99%

Size Enhancement of Transition Dipoles to One- and Two-Exciton Bands in a Photosynthetic Antenna

et al. 1996

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Measurement of nonlinear absorption and differential optical density spectrum as well as fluorescence behavior of the light harvesting antenna LH2 from purple bacterium Rhodobacter sphaeroides indicates exciton delocalization over 16 6 4 bacteriochlorophyll-a molecules, corresponding to probably the full physical length of the circular aggregate responsible for the 850 nm absorption band. The giant dipole moments for the consecutive transitions ground state ! one-exciton band ! two-exciton band are 25.5 6 2.5 D and 21.5 6 3.5 D, respectively. [S0031-9007(96)

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Section: Size Enhancement Of Transition Dipoles To One-and Two-excitomentioning

confidence: 99%

Size Enhancement of Transition Dipoles to One- and Two-Exciton Bands in a Photosynthetic Antenna

et al. 1996

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“…Later Freyer and co-workers reported (octaphenyltetraanthraporphyrazinato)palladiumĲII) 7 that underwent a self-sensitized photoreaction in the presence of oxygen to form the substituted palladium phthalocyanine 8 with four endoperoxide bridges (Scheme 4). 29 The product possessed photophysical properties similar to standard palladium phthalocyanines. The complex bearing four endoperoxide bridges releases singlet oxygen upon excitation by twophoton absorption (TPA) at 662 nm.…”

Section: Photochromic Systemsmentioning

confidence: 93%

Molecular devices based on reversible singlet oxygen binding in optical and photomedical applications

Filatov

Senge

2016

Mol. Syst. Des. Eng.

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Polycyclic aromatic hydrocarbons are known to bind singlet oxygen with formation of endoperoxides, which can be released upon heating. This process is now capturing broad attention due to its potential in photomedicine. Singlet oxygen generation upon decomposition of endoperoxides at ambient temperatures represents an alternative to classical photodynamic therapy (PDT), which is limited by hypoxia and reduced light penetration into cancer tissue. Moreover, endoperoxide formation with chromophoric molecules allows for a straightforward modification of the optical properties of the photoactive materials, e.g., shifting of the absorption/emission wavelength which is usually achieved by chemical tuning. This review provides a summary of the latest advances in this area of research along with a discussion of the basic properties of organic endoperoxides.

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“…85, which could be reversibly transformed into the starting material. 262 Scheme 27. Formation of asymmetric seco-porphyrazines using oxidation reactions.…”

Section: Oxidative Transformation Strategymentioning

confidence: 99%

Synthetic approaches to asymmetric phthalocyanines and their analogues

Nemykin¹,

Dudkin²,

Dumoulin³

et al. 2014

Arkivoc

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This review summarizes synthetic strategies for the preparation of asymmetric phthalocyanines and their analogues. Cross-condensation between two phthalonitrile components, crosscondensation between one phthalonitrile and one non-nitrile component, targeted synthesis of AABB-type compounds, the subphthalocyanine ring-expansion method, as well as postmodification approaches on pre-formed symmetric and asymmetric systems, are discussed. Methodologies for targeted preparation of specific types of asymmetric phthalocyanines and their analogues are also briefly overviewed.

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One‐ and Two‐Photon‐Induced Photochemistry of Modified Palladium Porphyrazines Involving Molecular Oxygen

Cited by 40 publications

References 40 publications

Size Enhancement of Transition Dipoles to One- and Two-Exciton Bands in a Photosynthetic Antenna

Size Enhancement of Transition Dipoles to One- and Two-Exciton Bands in a Photosynthetic Antenna

Molecular devices based on reversible singlet oxygen binding in optical and photomedical applications

Synthetic approaches to asymmetric phthalocyanines and their analogues

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