Carbon dots in zeolites: A new class of thermally activated delayed fluorescence materials with ultralong lifetimes

Liu, Jiancong; Wang, Ning; Yu, Yue; Yan, Yan; Zhang, Hongyue; Li, Jiyang; Yu, Jihong

doi:10.1126/sciadv.1603171

Cited by 303 publications

(260 citation statements)

References 55 publications

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“…In general, there are several advantages for CDs as the CL imaging probes: (i) CDs exhibit excellent light emission ability and the luminescence property can be tuned by different methods; [ 30,31 ] (ii) CDs with emission wavelength at near‐infrared (NIR) region (beyond 650 nm) can be synthesized, which is particularly important for bioimaging due to the deep tissue penetration; [ 32,33 ] (iii) the energy level of CDs can be modulated to reduce the energy interval with the energetic intermediate‐1,2‐dioxetanedione, which is beneficial to the electron transfer in the process of H 2 O 2 ‐activated luminescence and further enhances the CL quantum efficiency (QY) of CDs; [ 14 ] (iv) the abundant surface radicals endow CDs with the good ability of drug carriers; [ 34,35 ] (v) benign biocompatibility and high photostability of CDs make them promising application in CL bioimaging. [ 36–42 ] Hence, it is significant to develop CD‐based CL probes to generate luminescent signals in response to H 2 O 2 and further provides a category of bioimaging for ROS.…”

Section: Introductionmentioning

confidence: 99%

Near‐Infrared Chemiluminescent Carbon Nanodots and Their Application in Reactive Oxygen Species Bioimaging

et al. 2020

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the ROS molecules, hydrogen peroxide (H 2 O 2 ) is prime reactive species, whose overproduction is closely related to various diseases, including inflammation, cancer, or neurological diseases. [5][6][7][8][9] Thus it is of great importance in monitoring the concentration of H 2 O 2 in living specimens. To this end, a number of mapping tools including "dark" biological processes and radiative recombination mechanism have been developed. Chemiluminescence (CL), a kind of light emission induced by energy transfer from chemical reactions, has evoked considerable interest as one ultrasensitive chemical analysis method with quantification and localization. [10][11][12] Without auto-fluorescent interference and phototoxicity from high-energy excitation light, CL shows high signal-to-noise ratio and low perturbation in sensing H 2 O 2 in vivo compared to photoluminescence (PL) method. [13][14][15] Moreover, unlike the bioluminescence probe requiring the activation of bioactive enzyme, CL imaging of H 2 O 2 is a process of nonenzymatic reaction employing a H 2 O 2 -responsive peroxalate that can transfer chemical energy to the CL emitter. Nevertheless, current CL reporters on H 2 O 2 concentrate mainly on small-molecular dyes, semiconducting polymer, and aggregation induced emission nanoparticles, which suffer from low efficiency, short emission wavelength, and low chemical stability in highly oxidative ROS. [16,17] Thereby, it is meaningful to develop new class of CL nanosensors for the imaging and detecting ROS in vitro and in vivo.Carbon nanodots (CDs), which are considered as discrete quasi-spherical nanoparticles with sizes less than 10 nm, are one kind of promising nanomaterials in bioimaging, photocatalysis, optoelectronics, and sensing owing to its unique properties such as high emission efficiency, good biocompatibility, high photo-stability, and tunable luminescence. [18][19][20][21][22][23][24][25][26][27][28] Recently, the CL properties of CDs in peroxlate-H 2 O 2 system have been investigated, and it has been found that multicolor bright and persistent CL can be obtained from CDs. [29] Therefore, it is practicable to develop versatile CL probes based on CDs to detect ROS via in vivo or in vitro imaging. In general, there are several advantages for CDs as the CL imaging probes: (i) CDs exhibit excellent light emission ability and the luminescence property can be tuned by different methods; [30,31] (ii) CDs with emission Reactive oxygen species (ROS) are generated in the body and related to many pathophysiological processes. Hence, detection of ROS is indispensable in understanding, diagnosis, and treatment of many diseases. Here, near-infrared (NIR) chemiluminescent (CL) carbon nanodots (CDs) are fabricated for the first time and their CL quantum yield can reach 9.98 × 10 −3 einstein mol −1 , which is the highest value ever reported for CDs until now. Nanointegration of NIR CDs and peroxalate (P-CDs) through the bridging effect of amphiphilic triblock copolymer can serve as turn-on probes for the detection an...

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Section: Introductionmentioning

confidence: 99%

Near‐Infrared Chemiluminescent Carbon Nanodots and Their Application in Reactive Oxygen Species Bioimaging

et al. 2020

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“…Phosphorescence from CDs in PVA matrix was firstly reported by Zhao's group in 2013 23. Since then, several CDs‐based composite systems have been shown to exhibit phosphorescence signal 24, 25, 26, 27, 28. Dong et al demonstrated CDs‐based composite powders of potash alum, possessing long phosphorescence lifetimes of 707 ms 29.…”

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confidence: 99%

Multilevel Data Encryption Using Thermal‐Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites

et al. 2018

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Thermal‐treatment controlled room temperature phosphorescence is realized by embedding either originally synthesized carbon dots (CDs) or 200 °C thermal‐treated CDs into a polyvinylalcohol (PVA) matrix through post‐synthetic thermal annealing at 200 or 150 °C. The thermal‐treatment controlled phosphorescence is attributed to the transfer of photoexcitation from the excited singlet state to the triplet state through intersystem crossing, followed by radiative transition to the ground state, which is due to decrease of quenchers (oxygen) in the CDs and suppression of the vibrational dissipations through the chemical bonding of CDs in the PVA matrix. Multilevel fluorescence/phosphorescence data encryption is demonstrated based on the thermal‐treatment controlled phosphorescence from CD@PVA composites.

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“…Furthermore, the strong luminescence of CN/LDH is extremely inert to external stimulus including temperature and environmental pH, and its stability toward photobleaching is rather satisfactory. Although a great progress on the preparation of solid‐state fluorescent materials by means of solid matrix dispersion has been reported, carbon‐based phosphor with such a high SSQY and stability simultaneously is rarely documented. Both experimental studies and theoretical calculation reveal that the host–guest interactions between rigid LDH matrix and interlayer carbon nitride give contribution to the unprecedented SSQY and stability.…”

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Confined Synthesis of Carbon Nitride in a Layered Host Matrix with Unprecedented Solid‐State Quantum Yield and Stability

Liu

Guan

et al. 2017

Advanced Materials

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Fluorescent carbon nanomaterials have drawn tremendous attention for their intriguing optical performances, but their employment in solid-state luminescent devices is rather limited as a result of aggregation-induced photoluminescence quenching. Herein, ultrathin carbon nitride (CN) is synthesized within the 2D confined region of layered double hydroxide (LDH) via triggering the interlayer condensation reaction of citric acid and urea. The resulting CN/LDH phosphor emits strong cyan light under UV-light irradiation with an absolute solid-state quantum yield (SSQY) of 95.9 ± 2.2%, which is, to the best of our knowledge, the highest value of carbon-based fluorescent materials ever reported. Furthermore, it exhibits a strong luminescence stability toward temperature, environmental pH, and photocorrosion. Both experimental studies and theoretical calculations reveal that the host-guest interactions between the rigid LDH matrix and interlayer carbon nitride give the predominant contribution to the unprecedented SSQY and stability. In addition, prospective applications of the CN/LDH material are demonstrated in both white light-emitting diodes and upconversion fluorescence imaging of cancer cells.

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Carbon dots in zeolites: A new class of thermally activated delayed fluorescence materials with ultralong lifetimes

Abstract: A facile “dots-in-zeolites” strategy is developed to synthesize a new class of CD-based TADF materials with ultralong lifetimes.

Cited by 303 publications

References 55 publications

Near‐Infrared Chemiluminescent Carbon Nanodots and Their Application in Reactive Oxygen Species Bioimaging

Near‐Infrared Chemiluminescent Carbon Nanodots and Their Application in Reactive Oxygen Species Bioimaging

Multilevel Data Encryption Using Thermal‐Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites

Confined Synthesis of Carbon Nitride in a Layered Host Matrix with Unprecedented Solid‐State Quantum Yield and Stability

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