Principles of Directed Electronic Energy Transfer

Andrews, Davıd L.; Crisp, Richard G.

doi:10.1007/4243_2007_017

Cited by 5 publications

(3 citation statements)

References 62 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, dendrimers have been used as efficient light-harvesting species. 11 Although TPP is not a fluorescent molecule, it can exhibit very weak fluorescence emission in the range 400 nm to 500 nm, which overlaps with the emission range of HHPP (ca. 408 nm, see Fig.…”

Section: Explanations For the Unusual Enhanced Fluorescencementioning

confidence: 99%

“…As a result, dendrimers have been used as efficient lightharvesting species. 11 Compared with monodispersed and spherical dendrimers, polydispersed and semi-spherical hyperbranched polymers are cheaper and easier to produce. 12 The highly branched and compact structures and ample terminal groups of hyperbranched molecules leads to minimal entanglement, lower viscosity, and higher solubility compared with their linear analogs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Unusual strong fluorescence of a hyperbranched phosphate: discovery and explanations

Liu

Wang

et al. 2013

RSC Adv.

View full text Add to dashboard Cite

The unusual strong fluorescence of a hyperbranched molecule (3-hydroxyphenyl) phosphate (HHPP), which does not possess a rigid planar structure or obvious large p system, was discovered for the first time.The effects of the solvent polarity, pH value, concentration, and end group modification on the absorption and the fluorescence spectra of HHPP solutions were investigated. The terminal phenol groups and triphenyl phosphate (TPP) structures in HHPP were found to be responsible for two strong fluorescence peaks. The greatly enhanced fluorescence is explained by three factors. In particular, the special bridging effects of the phosphate groups in the hyperbranched molecules, which can form extended p electron systems, play an important role. It is suggested that the phosphate groups in the hyperbranched molecule could serve as effective bridging groups to connect various other fluorescence groups to form a new type of fluorescence molecule which does not have a rigid planar structure. In addition, the systematic colour changes with changing solvent polarity, mass concentration, and pH value make it a new potential probe in various applications.

show abstract

Section: Explanations For the Unusual Enhanced Fluorescencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Unusual strong fluorescence of a hyperbranched phosphate: discovery and explanations

Liu

Wang

et al. 2013

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…2). 26,27 Allowing for the possibility of energy transfer between donors in the same generation is an important feature of our model. Although Figure 2: Directing influence of a spectroscopic gradient on resonance energy transfer from D to A.…”

Section: One Generation Casementioning

confidence: 99%

Adjacency matrix formulation of energy flow in dendrimeric polymers

Andrews

2006

Nanomodeling II

Self Cite

View full text Add to dashboard Cite

Dendrimers are synthetic, highly branched polymers with an unusually high density of chromophores. As a result of their extremely high absorption cross-sections for visible light, they represent some of the most promising new materials for energy harvesting. Although the signature of the bonding structure in dendrimers is an essentially fractal geometry, the three-dimensional molecular folding of most higher generation materials results in a chromophore layout that is more obviously akin to concentric spherical shells. The number of chromophores in each shell is a simple function of the distance from the central core. The energy of throughput optical radiation, on capture by any of the chromophores, passes by a multi-step but highly efficient process to the photoactive core. Modeling this crucial migration process presents a number of challenges. It is far from a simple diffusive random walk; each step is subject to an intricate interplay of geometric and spectroscopic features. In this report, the first results of a new approach to the theory is described, developed and adapted from an adjacency matrix formulation. It is shown how this method offers not only kinetic information but also insights into the typical number of steps and the patterns of internal energy flow.

show abstract