Cascade energy transfer in a conformationally mobile multichromophoric dendrimer

Abstract

A conformationally flexible, generation-2,3 poly(aryl ether) dendrimer favors quantitative cascade fluorescence resonance energy transfer without the appearance of undesired chromophore self-quenching interactions such as excimer formation.

Macromolecular Antennas and Photovotaics

“…The Photophysical studies clearly demonstrate that the desired light harvesting and energy transfer goals are achieved as all energy absorbed by the Fluorol antenna is actually transferred to the Ru dye effectively doubling its efficiency. Therefore, our goal of increasing the light harvesting capabilities of the system had been achieved, and future implementation could involve a combination of dyes for better coverage of the solar spectrum, since we had also demonstrated the concept of "cascade" energy transfer in other multichromophoric dendritic antennae [4]. The new dyes were then tested in a Gratzel cell configuration including the liquid iodine/triiodide redox electrolyte.…”

Regulation of Photophysical Properties for Naphthyl Decorated PAMAM Dendrimers by Pseudorotaxane Formation at Periphery

“…Müllen 研究组利用刚性的树枝形聚合物骨架来减 少外围官能团间的相互作用 [16] ; Fréchet 研究组通过选择 特殊的发色团避免基团间的自猝灭 [17] . 最近, 我们利用 具有聚集诱导发光增强(Aggregation Induced Emission) 性质的发色团作为捕光基团构筑了新型光功能树枝形 聚合物体系 [18] .…”

Novel derivatives of 1,6,7,12-tetrachloroperylene-3,4,9,10-tetracarboxylic acid: synthesis, electrochemical and optical properties

“…These compounds have been extensively employed as the photo-functional materials for the construction of efficient and tunable electron donoracceptor systems 13,14,15,16,17 and light-harvesting arrays. 18,19,20,21 These dyes have also been used in other photo-physical processes of current interest, such as photocatalysis, 22,23 singlet exciton fission, 24,25 triplet-triplet annihilation, 26 organic photovoltaics, 27,28,29 lasing, 30 fluorescence probing, 31,32,33 and bio-labelling. 34 As compared to other organic dyes, perylene dyes provide a wealth of opportunities for the tuning of their properties via structural modification.…”

“…1,36,37 For the bay functionalization, 1,7-disubstitution and 1,6,7,12-tetrasubstitution have been used as the two major approaches, for which 1,7-Since the halogen atoms can undergo a large variety of substitution and carbon-carbon coupling reactions, the bay-halogenated derivatives (A2-D2 and A3-D3) are highly valuable and versatile synthons. For attaching substituents to bay area, various methods, such as Suzuki 21 and Sonogashira 38 couplings, and nucleophilic aromatic substitution reactions, mostly with sulfides, 16,39,40 cyclic amines, 14,33,41 and phenols, 5,15,20,41,42 have been reported.…”