Dendrimers: A Mimic Natural Light‐Harvesting System

Zeng, Yi; Li, Yingying; Chen, Jinping; Yang, Guoqiang; Li, Yang

doi:10.1002/asia.200900653

Cited by 70 publications

(28 citation statements)

References 103 publications

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“…2 In addition to its important role in photosynthesis, efficient transfer of energy from multiple chromophores to a single acceptor is of potential significance to solar cells, photocatalysts, optical sensors and light‐emitting devices 7–10. For these reasons, there has been a great deal of interest in mimicking the natural light‐harvesting process 11–37. A variety of scaffolds have been used including dendrimers,11–17 organogels,18, 19 porphyrin arrays/assemblies,20–23, 34 biopolymer assemblies,24–28 and organic–inorganic hybrid materials 29–32…”

Section: Methodsmentioning

confidence: 99%

Artificial Light‐Harvesting System Based on Multifunctional Surface‐Cross‐Linked Micelles

Peng

Chen

Zhao³

et al. 2012

Angewandte Chemie

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A good harvest: Two self‐assembling strategies (micellization and electrostatic attraction) and covalent capture were employed to construct a robust, inexpensive, efficient artificial light‐harvesting system (see picture). The synthesis was achieved by a one‐pot reaction. A high density of the antenna chromophores was achieved without self‐quenching and excimer formation, thus affording extremely efficient energy transfer.

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Section: Methodsmentioning

confidence: 99%

Artificial Light‐Harvesting System Based on Multifunctional Surface‐Cross‐Linked Micelles

Peng

Chen

Zhao³

et al. 2012

Angewandte Chemie

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“…The multiporphyrin dendrimers should be an excellent model system because both n D and d DD can be adjusted independently by controlling the type, number, and position of linkers while keeping d DA and the spectral overlap integral for D-A pairs unchanged for each donor. [6,38] In this context, we synthesized a total of six multiporphyrin dendrimers with various combinations of n D and d DD values, as illustrated in Figure 3. For example, SD4A, MD4A, and LD4A have the same n D value but different d DD values, and MD2A, MD4A, and MD8A have the same d DD value but different n D values.…”

Section: Design Of Multiporphyrin Dendrimersmentioning

confidence: 99%

Enhancement of Energy Transfer Efficiency with Structural Control of Multichromophore Light‐Harvesting Assembly

Lee

Kim

et al. 2020

Advanced Science

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Multichromophore systems (MCSs) are envisioned as building blocks of molecular optoelectronic devices. While it is important to understand the characteristics of energy transfer in MCSs, the effect of multiple donors on energy transfer has not been understood completely, mainly due to the lack of a platform to investigate such an effect systematically. Here, a systematic study on how the number of donors (n D) and interchromophore distances affect the efficiency of energy transfer (FRET) is presented. Specifically, FRET is calculated for a series of model MCSs using simulations, a series of multiporphyrin dendrimers with systematic variation of n D and interdonor distances is synthesized, and FRET s of those dendrimers using transient absorption spectroscopy are measured. The simulations predict FRET in the multiporphyrin dendrimers well. In particular, it is found that FRET is enhanced by donor-to-donor energy transfer only when structural heterogeneity exists in an MCS, and the relationships between the FRET enhancement and the structural parameters of the MCS are revealed.

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“…With an increase in the number of phenylacetylene groups, the number of energy‐collecting sites increases, and hence they serve as efficient light harvesters. Nevertheless, the efficiency of the energy transfer decreases with the increase in generations …”

Section: Singlet–singlet and Triplet–triplet Energy‐transfer Dendrimersmentioning

confidence: 99%

Advances in Light‐Emitting Dendrimers

Abd‐El‐Aziz

Abdelghani

Wagner

et al. 2018

Macromol. Rapid Commun.

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with increasing generation), or even at the branching sites. Such dendrimeric structures with incorporated chromophores provide a mimic of the photosynthetic light-harvesting system, in which antenna chromophores surround the inner reaction center. [35][36][37][38] Each photoactive group within a dendrimer can show quite different emission and energy-transfer properties compared with those of the same chromophore within a small molecule (or as a separate free molecule itself), as a result of the close spatial proximity to neighboring moieties. For instance, in well-designed dendrimers, photoexcited chromophores can undergo energy transfer to other units, funneling the energy through the antenna framework toward the core, which can serve as the basis for solar energy conversion, [39,40] luminescent sensors, [41,42] and photoinduced electron transfer (PET) between units of the dendrimers. [43][44][45] This process can also result in the useful formation of excimer and exciplex species within the dendrimer, which will exhibit vastly different emission wavelengths. [46][47][48] Furthermore, dendrimers which contain metal ions have been generated to combine the redox properties of metals with other dendrimeric properties. [27,[49][50][51][52][53][54] In this review we will focus on light-harvesting dendrimeric materials with many illustrative examples. DendrimersThe design of dendrimers with various chromophores has attracted significant attention in light of the dual effect of the luminescence of the chromophores and the morphology of the synthesized dendrimers. Recent developments in this field stem from their wide potential applications, including organic light-emitting diodes, photonic switches and upconversion lasers, as well as sensors and electronic devices. The focus of this comprehensive review is on the design and properties of various classes of lightharvesting dendrimeric materials.

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Dendrimers: A Mimic Natural Light‐Harvesting System

Cited by 70 publications

References 103 publications

Artificial Light‐Harvesting System Based on Multifunctional Surface‐Cross‐Linked Micelles

Artificial Light‐Harvesting System Based on Multifunctional Surface‐Cross‐Linked Micelles

Enhancement of Energy Transfer Efficiency with Structural Control of Multichromophore Light‐Harvesting Assembly

Advances in Light‐Emitting Dendrimers

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