Near-infrared chemiluminescence tunable from 900 nm to 1700 nm from narrow-bandgap compounds and polymers

Abstract

Near-infrared chemiluminescence tunable from 900 nm to 1700 nm was realized from the reaction of the narrow-bandgap compounds and polymers with oxalyl chloride and hydrogen peroxide. A prolonged chemiluminescent process can be achieved in solutions at low temperature or in polymer gels at room temperature.

Advances in Organic Near-Infrared Materials and Emerging Applications

“…Besides the OLED applications, NIR fluorescent compounds can be used as light sources in CL applications 24, 25. Our early work confirmed the CL of compounds 1 , 4 , 8 , and 9 within the spectral region of 900–1700 nm, according to their bandgaps 24.…”

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

“…Reproduced with permissionfrom ref. [27].C opyright: Nature PublishingG roup. ChemBioChem 2018ChemBioChem , 19,2522ChemBioChem -2541 www.chembiochem.org showing arterial (red) and venouscerebral vessels (blue)a nd fluorophore leakage(green).…”

“…SWCNTsa rc discharge, laser ablation, and chemical ozone,diazonium, alkyl carboxylation, hydrogen peroxide, phospho- [14], [15], [16], [17] vapor deposition lipid (PL)-polyethylene glycol (PEG) QDs hot injection, solvothermal, microwave core-shellp articles, Pb 2 + -dopedA g 2 SQ Ds, CdS-coated shell to protect [18], [19], [ 20], irradiation the PbS core (PEGylation) [21], [22] RE compounds sol-gel, coprecipitation, hydrothermal core-shell particles (core: hostm aterial anddopants;shell:u ndoped [ 23], [24] host material;installation of 2% Ce and Er codoped NaYbF 4 corea nd an inert NaYF 4 shell) conjugated withP EG-based polymers organic StilleorS uzuki coupling between electron-micellar, PEGylation electron-acceptor unit:B BTD), electron-donor [25], [26], [27], fluorescent acceptor unit andelectron-donor unit,n ano-u nit:t riphenylamine, thiophene,electron-shielding unit:2,6-alkoxy [28], [29], [30], materials precipitation chain substitution, alkyl chain substituted fluorine [31], [32], [33] [a] BBTD: benzo[1,2-c:4,5-c']bis( [1,2,5]thiadiazole. Figure 4.…”

“…Qian et al developed a series of organic fluorescent materials based on D-A-D structure with BBTD derivatives as the acceptor.T he chemical structures of NIR-II luminophores 1-5 are shown in Scheme1. [26,27] These organic fluorescent materials have low solubility in aqueous solution.…”

Novel bright-emission small-molecule NIR-II fluorophores for in vivo tumor imaging and image-guided surgery

“…At longer fluorescence emission wavelengths in the NIR-II region, the increased bandgap of molecular fluorophores generally gives way to reduce interactions between the conjugated backbone and other molecules, causing a high fluorescence quantum yield (QY). 18,19,20 Therefore, in this work, R 1 substituent groups on the sp 3 carbon of the fluorene group are out-of-plane of the π-conjugated system and thus prevent intermolecular stacking that leads to fluorescence quenching. Meanwhile, newly introduced 2-amino 9,9-dialkyl-substituted fluorene moieties distort the BBTD backbone and thus effectively tune the electrostatic potential distribution and the bandgap to the desired range.…”