Photoinduced electron and energy transfer processes in supported multilayers: Energy delocalization and antennae effects

Whitten, David G.; Spooner, Susan P.; Hsu, Yong; Penner, Thomas L.

doi:10.1016/0923-1137(91)90145-e

Cited by 9 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The large rate constants as well as their lack of dependence on viscosity or temperature can be explained by proposing excitation migration from donor to donor within the BAZrP matrix, followed by electron transfer between the nearest neighbors. Thus, a diffusion-independent, low activation mechanism can explain the above observations …”

Section: Resultsmentioning

confidence: 80%

“…Tris(2,2‘-bipyridyl)ruthenium(II) 2+ (abbreviated as Ru(bpy) 3 2+ ) was used in the current studies as the light absorbing chromophore (donor), and tris(2,2‘-bipyridyl)cobalt(III) 3+ (Co(bpy) 3 3+ ) (acceptor) has been used as the quencher. Ru(bpy) 3 2+ absorbs in the visible region, and hence, the window of light absorption is shifted to longer wavelengths when compared to the aromatic antenna systems described earlier. , Ru(bpy) 3 2+ is quite stable to heat and light, making it a convenient chromophore to construct artificial light-harvesting complexes. Spectroscopic properties of Ru(bpy) 3 2+ are extensively investigated for its use in solar energy conversion and storage …”

mentioning

confidence: 92%

“…Efficient energy and electron transfer was also observed when donors and acceptors were arranged in successive layers of Langmuir−Blodgett films . Donor to donor energy migration (antenna effect) was proposed to occur in these films.…”

mentioning

confidence: 96%

See 2 more Smart Citations

Supramolecular Assemblies of Metal Complexes: Light-Induced Electron Transfer in the Galleries of α-Zirconium Phosphate

1998

View full text Add to dashboard Cite

Rapid photoinduced electron transfer was observed with supramolecular assemblies of donor and acceptor metal complexes at the galleries of n-butylammonium salt of α-zirconium phosphate ((C4H9NH3)2Zr(PO4)2·xH2O, abbreviated as BAZrP). Tris(2,2‘-bipyridyl)ruthenium(II)2+ luminescence, for example, was quenched by tris(2,2‘-bipyridyl)cobalt(III)3+ with rate constants exceeding 1.6 × 1012 m2 mol-1 s-1, when the metal complexes were intercalated in the galleries of BAZrP. The quenching rates were unaffected when the viscosity of the BAZrP suspensions was increased (2:1 mixture of ethylene glycol−water) or when the loading of the donor was increased 10-fold. Even when cooled to 77 K, as a rigid glass, the electron transfer reactions between the donor and the acceptor proceed at essentially the same rate as at room temperature indicating a very low activation energy for the electron transfer reaction. These activation-less rate constants are faster than anticipated for diffusion controlled electron transfer rates at BAZrP galleries, at low temperatures. Excited-state energy migration from donor to donor (antenna effect) followed by electron transfer between the nearest donor−acceptor pairs is one explanation proposed to account for the above observations.

show abstract

Section: Resultsmentioning

confidence: 80%

mentioning

confidence: 92%

See 1 more Smart Citation

Supramolecular Assemblies of Metal Complexes: Light-Induced Electron Transfer in the Galleries of α-Zirconium Phosphate

1998

View full text Add to dashboard Cite

show abstract

“…One of the most important features responsible for the great efficiency of photosynthesis is the energy transfer process from the neighboring chromophores to the special pair, through the so called antenna effect. [66][67][68][69][70][71][72][73][74][75][76][77] Because of their key role, energy transfer processes have been extensively studied for a number of systems. For instance, Lehn and co-workers.…”

Section: Vectorial Energy Transfer and Antenna Effectmentioning

confidence: 99%

Molecular materials and devices: developing new functional systems based on the coordination chemistry approach

Toma¹

2003

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Neste limiar da era nanotecnológica, o planejamento molecular dos materiais e os estudos de moléculas isoladas estão abrindo imensas possibilidades no emprego de sistemas moleculares em dispositivos eletrônicos e fotônicos, bem como em aplicações tecnológicas baseadas em propriedades de chaveamento ou reconhecimento molecular. Com esse escopo, os químicos inorgânicos em particular, podem aplicar com vantagens as estratégias proporcionadas pela química de coordenação, para construir nanomateriais funcionais que permitam a exploração das propriedades dos centros metálicos e das características dos ligantes presentes. A química de coordenação também oferece recursos eficientes na auto-montagem de nanoestruturas, baseadas na especificidade da interação metal-ligante e nas características estereoquímicas dos complexos. Diversos materiais moleculares gerados a partir de compostos inorgânicos e metal-orgânicos são focalizados neste artigo, com ênfase em novas porfirinas e porfirazinas supramoleculares, clusters e complexos metálicos. Tais sistemas também são enfocados sob o ponto de vista de suas aplicações em catálise, sensores e dispositivos moleculares. At the onset of the nanotechnology age, molecular designing of materials and single molecule studies are opening wide possibilities of using molecular systems in electronic and photonic devices, as well as in technological applications based on molecular switching or molecular recognition. In this sense, inorganic chemists are privileged by the possibility of using the basic strategies of coordination chemistry to build up functional supramolecular materials, conveying the remarkable chemical properties of the metal centers and the characteristics of the ancillary ligands. Coordination chemistry also provides effective self-assembly strategies based on specific metal-ligand affinity and stereochemistry. Several molecular based materials, derived from inorganic and metal-organic compounds are focused on this article, with emphasis on new supramolecular porphyrins and porphyrazines, metal-clusters and metal-polyimine complexes. Such systems are also discussed in terms of their applications in catalysis, sensors and molecular devices.

show abstract

“…[66][67][68][69][70][71][72][73][74][75][76][77] Because of their key role, energy transfer processes have been extensively studied for a number of systems. For instance, Lehn and co-workers.…”

Section: Vectorial Energy Transfer and Antenna Effectmentioning

confidence: 99%

Molecular Materials and Devices: Developing New Functional Systems Based on the Coordination Chemistry Approach

Toma

2004

ChemInform

View full text Add to dashboard Cite

Neste limiar da era nanotecnológica, o planejamento molecular dos materiais e os estudos de moléculas isoladas estão abrindo imensas possibilidades no emprego de sistemas moleculares em dispositivos eletrônicos e fotônicos, bem como em aplicações tecnológicas baseadas em propriedades de chaveamento ou reconhecimento molecular. Com esse escopo, os químicos inorgânicos em particular, podem aplicar com vantagens as estratégias proporcionadas pela química de coordenação, para construir nanomateriais funcionais que permitam a exploração das propriedades dos centros metálicos e das características dos ligantes presentes. A química de coordenação também oferece recursos eficientes na auto-montagem de nanoestruturas, baseadas na especificidade da interação metal-ligante e nas características estereoquímicas dos complexos. Diversos materiais moleculares gerados a partir de compostos inorgânicos e metal-orgânicos são focalizados neste artigo, com ênfase em novas porfirinas e porfirazinas supramoleculares, clusters e complexos metálicos. Tais sistemas também são enfocados sob o ponto de vista de suas aplicações em catálise, sensores e dispositivos moleculares.At the onset of the nanotechnology age, molecular designing of materials and single molecule studies are opening wide possibilities of using molecular systems in electronic and photonic devices, as well as in technological applications based on molecular switching or molecular recognition. In this sense, inorganic chemists are privileged by the possibility of using the basic strategies of coordination chemistry to build up functional supramolecular materials, conveying the remarkable chemical properties of the metal centers and the characteristics of the ancillary ligands. Coordination chemistry also provides effective self-assembly strategies based on specific metal-ligand affinity and stereochemistry. Several molecular based materials, derived from inorganic and metal-organic compounds are focused on this article, with emphasis on new supramolecular porphyrins and porphyrazines, metal-clusters and metal-polyimine complexes. Such systems are also discussed in terms of their applications in catalysis, sensors and molecular devices.

show abstract

Photoinduced electron and energy transfer processes in supported multilayers: Energy delocalization and antennae effects

Cited by 9 publications

References 25 publications

Supramolecular Assemblies of Metal Complexes: Light-Induced Electron Transfer in the Galleries of α-Zirconium Phosphate

Supramolecular Assemblies of Metal Complexes: Light-Induced Electron Transfer in the Galleries of α-Zirconium Phosphate

Molecular materials and devices: developing new functional systems based on the coordination chemistry approach

Molecular Materials and Devices: Developing New Functional Systems Based on the Coordination Chemistry Approach

Contact Info

Product

Resources

About