Advances in Light‐Emitting Dendrimers

Abstract

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.

Recent advances in metallopolymer-based drug delivery systems

“…Their properties can be adjusted by changing the interaction strength of metal centers with the polymer backbone. [44][45][46][47][48] MPs are highly interesting materials with properties combining the technological advantages of polymers with the functionality of metal centers, therefore, these compounds have outstanding potential for use in a broad range of advanced sustainable applications including functional materials, [49][50][51][52][53][54][55] catalysis and biocatalysis, [56][57][58][59][60][61][62][63] electroactive, 64 photoactive, [65][66][67][68][69][70] conducting 71 and magnetic 45 materials, as well as environment 72 and nanomaterials science. [73][74][75][76][77][78][79][80] MPs have been known for a long time but have recently become the subject of large development.…”

Surface Functionalization of Cotton Fabric with Fluorescent Dendrimers, Spectral Characterization, Cytotoxicity, Antimicrobial and Antitumor Activity

“…Dendrimers are very attractive macromolecules that, in the last years, have been studied extensively from different scientific aspects-biological, biomedical and regarding environment protection, photovoltaic and light-emitting devices, etc. [1][2][3][4]. New, highly bioactive dendrimers can be obtained by modification with bioactive monomer agents.…”

Exploring the Effect of the Irradiation Time on Photosensitized Dendrimer-Based Nanoaggregates for Potential Applications in Light-Driven Water Photoreduction

“…According to this approach, macromolecular structures with well-defined architectures and monodispersity emerge as relatively viable and interesting alternatives for the development of viable photoactive systems [24,25,26]. Specifically, the use of dendrimers seems to be an ideal strategy due to their unique chemical structure and properties, such as compact globular shapes and sizes, significant peripheral functionalities, and appropriate stability in diverse chemical environments [27,28,29]. Importantly, the high functionality of polyamidoamine (PAMAM) provides a profitable way to covalently attach photosensitizers onto their numerous peripheral functional groups.…”