Versatile, stable, and air-tolerant triplet–triplet annihilation upconversion block copolymer micelles

Yang, Huanzhi; Guo, Shaowei; Jin, Bixin; Luo, Yunjun; Li, Xiaoyü

doi:10.1039/d2py00596d

Cited by 15 publications

(15 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Block copolymers also represent an opportunity to covalently bind UC materials to prevent payload leakage. Toward this end, Yang et al recently synthesized block copolymer micelles with DPA monomers integrated into the core forming block . In addition to the block copolymer tunability, the UC properties can also be modulated because of the multiple options available for hydrophobic solvent cores.…”

Section: Solution-state Applicationsmentioning

confidence: 99%

“…Toward this end, Yang et al recently synthesized block copolymer micelles with DPA monomers integrated into the core forming block. 95 In addition to the block copolymer tunability, the UC properties can also be modulated because of the multiple options available for hydrophobic solvent cores. For instance, Congreve and co-workers use this method to encapsulate a wide variety of UC systems and tune the solvent core to reduce deleterious molecular aggregation in the micelle core.…”

Section: Polymer-based Nanoparticlesmentioning

confidence: 99%

“…(C) Encapsulation with amphiphilic block copolymers. There are other methods to generate dense covalent networks for encapsulation in addition to using amphiphilic block copolymers that are discussed in the main text. ,− (D) Silica shell coating (dark blue) around a nanodroplet emulsion stabilized by amphiphilic small molecules. ,− (E) MOFs with annihilator and sensitizer molecules depicted as incorporated into the MOF backbone. We note that MOFs have been reported with annihilators incorporated within the MOF framework or with annihilators dispersed in the MOF channels. − …”

Section: Solution-state Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Nanoengineering Triplet–Triplet Annihilation Upconversion: From Materials to Real-World Applications

et al. 2023

View full text Add to dashboard Cite

Using light to control matter has captured the imagination of scientists for generations, as there is an abundance of photons at our disposal. Yet delivering photons beyond the surface to many photoresponsive systems has proven challenging, particularly at scale, due to light attenuation via absorption and scattering losses. Triplet−triplet annihilation upconversion (TTA-UC), a process which allows for low energy photons to be converted to high energy photons, is poised to overcome these challenges by allowing for precise spatial generation of high energy photons due to its nonlinear nature. With a wide range of sensitizer and annihilator motifs available for TTA-UC, many researchers seek to integrate these materials in solution or solid-state applications. In this Review, we discuss nanoengineering deployment strategies and highlight their uses in recent state-of-the-art examples of TTA-UC integrated in both solution and solid-state applications. Considering both implementation tactics and application-specific requirements, we identify critical needs to push TTA-UC-based applications from an academic curiosity to a scalable technology.

show abstract

Section: Solution-state Applicationsmentioning

confidence: 99%

Section: Polymer-based Nanoparticlesmentioning

confidence: 99%

Section: Solution-state Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

Nanoengineering Triplet–Triplet Annihilation Upconversion: From Materials to Real-World Applications

et al. 2023

View full text Add to dashboard Cite

show abstract

“…46 Here, we employed nanoencapsulation as an alternate method to integrate UC systems into diverse matrices. 29,[48][49][50][51][52] After encapsulation, the chemical compatibility of the resultant nanomaterials with a system will dictate the efficiency of delivering upconverted light, thereby overcoming the limitations of individual molecules. We encapsulated UV-emitting UC materials using the block copolymer Pluronic F-127 [53][54][55] to form self-assembled micelles in water.…”

Section: Mainmentioning

confidence: 99%

Spatially Controlled UV Light Generation at Depth Using Upconversion Micelles

Zhou

Wirtz

Schloemer

et al. 2022

Preprint

View full text Add to dashboard Cite

Ultraviolet (UV) light can trigger a plethora of useful photochemical reactions for diverse applications, including photocatalysis, photopolymerization, and drug delivery. These applications typically require penetration of high energy photons deep into materials, yet delivering these photons beyond the surface is extremely challenging due to absorption and scattering effects. Triplet-triplet annihilation upconversion (TTA-UC) shows great promise to circumvent this issue by generating high energy photons from incident lower energy photons. However, molecules that facilitate TTA-UC usually have poor water solubility, limiting their deployment in aqueous environments. To address this challenge, we leverage a nanoencapsulation method to fabricate water-compatible UC micelles, enabling on-demand UV photon generation deep into materials. We present two iridium-based complexes for use as TTA-UC sensitizers with increased solubilities that facilitate the formation of highly emissive UV-upconverting micelles. Furthermore, we show this encapsulation method is generalizable to nineteen UV-emitting UC systems, accessing a range of upconverted UV emission profiles with wavelengths as low as 350 nm. As a proof-of-principle demonstration of precision photochemistry at depth, we use UV-emitting UC micelles to photolyze a fluorophore at a focal point nearly a centimeter beyond the surface, revealing opportunities for spatially controlled manipulation deep into UV-responsive materials.

show abstract

“…Additionally, commonly used sensitizers and annihilators are typically hydrophobic, limiting solubility to non-polar environments. One extremely successful motif to overcome these challenges has been to encapsulate materials inside of nanoparticles, such as liposomes, [35][36][37] polymer-coated nanodroplets, [38][39][40][41][42] and silica-coated nanoparticles. 32,[43][44][45][46][47] This allows for the TTA-UC materials to be highly concentrated within the nanoparticle, but the nanoparticle concentration can be tuned such that the low energy light can penetrate sufficiently beyond the surface and deliver ample upconverted photons.…”

mentioning

confidence: 99%

Controlling the durability and optical properties of triplet–triplet annihilation upconversion nanocapsules

et al. 2023

View full text Add to dashboard Cite

show abstract

Versatile, stable, and air-tolerant triplet–triplet annihilation upconversion block copolymer micelles

Abstract: Triplet-triplet annihilation photon upconversion (TTA-UC) systems based on organic molecules have emerged as a highly topical research area in the recent decade. Despite their numerous advantages, however, the practical application...

Cited by 15 publications

References 60 publications

Nanoengineering Triplet–Triplet Annihilation Upconversion: From Materials to Real-World Applications

Nanoengineering Triplet–Triplet Annihilation Upconversion: From Materials to Real-World Applications

Spatially Controlled UV Light Generation at Depth Using Upconversion Micelles

Controlling the durability and optical properties of triplet–triplet annihilation upconversion nanocapsules

Contact Info

Product

Resources

About