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Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion
Xu, J.; Yin, Z.; Zhang, L.; Dong, Q.; Cai, X.; Li, S.; Chen, Q.; Keoingthong, P.; Li, Z.; Chen, L.; Chen, Z.; Tan, W.
2021-08-01
Source PublicationCCS Chemistry
ISSN2096-5745
Pages2288-2298
Abstract

Aggregation plays a critical role in modulating the photophysical process of organic molecules. However, the rational control of the construction of a function-oriented stacking mode for efficient photothermal (PT) conversion in the second near-infrared region (NIR-II; 1000–1700 nm) remains a challenge. Herein, an H-aggregation of 3,3′,5,5′-Tetramethylbenzidine (TMB)–TMB dication (TMB++) complexes in linear agarose (H-TTC/LAG) with narrowed band gap (0.96 eV) was fabricated through intermolecular hydrogen-bonding interactions between the amino groups of TTC and the peripheral hydroxyl groups of LAG. Charge-transfer mechanism and H-aggregation ensured NIR-II absorption of the complex at >1400 nm. The H-aggregation also promoted a non-radiation relaxation pathway and improved the thermal stability of TTC, which together favored the constructed H-TTC/LAG with ultra-efficient PT conversion that increased rapidly to 140 °C in 15 s under the NIR-II laser (1064 nm, 1.0 W cm−2) irradiation. Such a unique H-TTC/LAG with good biocompatibility was used to demonstrate a superior PT therapy via high-efficiency tumor growth inhibition in mouse mammary carcinoma (4T1) the BALB/c mice tumor-bearing xenografts. This is the first established H-aggregation of charge-transfer complexes in a noncovalent system, which not only provides a new strategy to develop ultra-efficient NIR-II PT materials but also paves the way for constructing functional materials with aggregates of charge-transfer complexes.

KeywordPhotothermal
Indexed ByESCI
Language英語English
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000826468400015
The Source to ArticlePB_Publication
PUB ID59604
Fulltext Access
Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Corresponding AuthorChen, Z.
Recommended Citation
GB/T 7714
Xu, J.,Yin, Z.,Zhang, L.,et al. Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion[J]. CCS Chemistry,2021:2288-2298.
APA Xu, J.,Yin, Z.,Zhang, L.,Dong, Q.,Cai, X.,Li, S.,Chen, Q.,Keoingthong, P.,Li, Z.,Chen, L.,Chen, Z.,&Tan, W..(2021).Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion.CCS Chemistry,2288-2298.
MLA Xu, J.,et al."Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion".CCS Chemistry (2021):2288-2298.
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