Supramolecular free radicals: near-infrared organic materials with enhanced photothermal conversion

Jiao, Yang; Li, Kai; Wang, Guangtong; Wang, Yapei; Zhang, Xi

doi:10.1039/c5sc01167a

Cited by 198 publications

(218 citation statements)

References 63 publications

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“…Benefiting from the bulky CB[7] head groups, the aggregation of BPDI was suppressed, causing a significant improvement of radical yield compared to BPDI itself. The supramolecular radicals were utilized for NIR photothermal conversion, showing an improved photothermal conversion efficiency as high as 31.6% . Furthermore, the dynamic and adaptive properties derived from supramolecular interactions exhibit the potential for the construction of smart materials.…”

Section: Fabrication Of Supramolecularly Stabilized Organic Radicalsmentioning

confidence: 99%

Tuning the Energy Gap by Supramolecular Approaches: Towards Near‐Infrared Organic Assemblies and Materials

Song

Jiao

Wang

et al. 2015

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Near-infrared (NIR) organic materials are of great importance for both fundamental research and practical applications. While much effort has been taken to covalently design and synthesize NIR organic materials with a low energy gap, there are supramolecular approaches for tuning the energy gap to noncovalently fabricate NIR organic assemblies and materials. In this concept article, we summarize and discuss several supramolecular approaches, including the fabrication of charge transfer supramolecular complexes, the fabrication of supramolecular J-aggregates, and the fabrication of supramolecularly stabilized organic radicals. The nature of noncovalent interactions in supramolecular approaches can provide NIR organic assemblies and materials with unique properties such as reversibility, stimuli-responsiveness, recyclability, and adaptive abilities.

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Section: Fabrication Of Supramolecularly Stabilized Organic Radicalsmentioning

confidence: 99%

Tuning the Energy Gap by Supramolecular Approaches: Towards Near‐Infrared Organic Assemblies and Materials

Song

Jiao

Wang

et al. 2015

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“…[9] Driven by the desire to prepare more high-performance PT conversion materials,e xtensive efforts are paid from two aspects:one is to enhance IR absorption [10] through extending the molecular conjugation length or covalently linking electron-donor and electron-acceptor fragments, [11] and the other is to inhibit the radiative transition process [12] by enhancing the quenching effect or increasing the concentration of free radicals. [13] However,both the complicated design and tedious synthesis limited the development of organic PT areas.T herefore,i ti sn ecessary to develop new types of PT materials to meet the increasing PT application demands.…”

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confidence: 99%

Cocrystals Strategy towards Materials for Near‐Infrared Photothermal Conversion and Imaging

et al. 2018

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A cocrystal strategy with a simple preparation process is developed to prepare novel materials for near-infrared photothermal (PT) conversion and imaging. DBTTF and TCNB are selected as electron donor (D) and electron acceptor (A) to self-assemble into new cocrystals through non-covalent interactions. The strong D-A interaction leads to a narrow band gap with NIR absorption and that both the ground state and lowest-lying excited state are charge transfer states. Under the NIR laser illumination, the temperature of the cocrystal sharply increases in a short time with high PT conversion efficiency (η=18.8 %), which is due to the active non-radiative pathways and inhibition of radiative transition process, as revealed by femtosecond transient absorption spectroscopy. This is the first PT conversion cocrystal, which not only provides insights for the development of novel PT materials, but also paves the way of designing functional materials with appealing applications.

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“…The hS product could be calculated by the following equation [21]: τ s was calculated to be 517.01 s. Thus, hS = 2.43 mW/ °C. Thus, the photo-thermal conversion efficiency η of BFITO nanoparticle was calculated to be 28.04%, which is relatively high compared with the previous reports, such as ~21.0% of Au nanorods under 800 nm laser [21], 25.7% of Cu 9 S 5 nanocrystals with 980 nm laser [22], and 16.3% for BPDI radical anions under 808 nm laser [23]. The high η of BFITO nanoparticle shows its excellent heat conversion capability.…”

Section: Resultsmentioning

confidence: 69%

Enhanced near-infrared absorption and photo-thermal generation in black iron doped indium tin oxide

Shao

Ruotolo

2016

Opt. Mater. Express

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Band engineering of transparent semiconductors, such as TiO 2 , SnO 2 , has recently been attempted to become black colour in order to increase photocatalytic efficiency in the visible and near infrared ranges. Here, we investigated a previously-neglected property in black oxides by using the example of iron doped indium tin oxide nanoparticles: the photothermal effect in the visible and near-infrared ranges. We found a significant enhancement of the photo-thermal generation in the nearinfrared biological window that is due to photon absorption, with no significant contribution from surface plasmon resonance. This allows independent magnetic functionalization of the particles by iron doping. These particles may be used for in-vivo cancer treatment where heat is photo-termally generated, while keeping the magnetism as a mean for remote manipulation through permanent magnets.

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Supramolecular free radicals: near-infrared organic materials with enhanced photothermal conversion

Abstract: A novel kind of supramolecular free radical with significantly improved free radical yield and enhanced near-infrared photothermal conversion has been fabricated.

Cited by 198 publications

References 63 publications

Tuning the Energy Gap by Supramolecular Approaches: Towards Near‐Infrared Organic Assemblies and Materials

Tuning the Energy Gap by Supramolecular Approaches: Towards Near‐Infrared Organic Assemblies and Materials

Cocrystals Strategy towards Materials for Near‐Infrared Photothermal Conversion and Imaging

Enhanced near-infrared absorption and photo-thermal generation in black iron doped indium tin oxide

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