Red aqueous room-temperature phosphorescence modulated by anion–π and intermolecular electronic coupling interactions

Liu, Fengbo; Yang, Huihui; Sun, Dongdong; Gao, Fang; Zhang, Xiongzhi; Zhao, Zhijun; Xie, Hui; Liu, Simin

doi:10.1039/d1sc06503c

Cited by 17 publications

(12 citation statements)

References 48 publications

(138 reference statements)

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“…Figure (b) shows Raman spectra of four kinds of CF surfaces. Compared with CF-desized and MWNT@CF, a fluorescent interference background appeared in the D and G bands of MOF@CF and MWNT/MOF@CF due to the effective quenching of fluorescence from the MOF structure, confirming the successful self-assembly of MOF and MWNT/MOF on the CF surface. − The G bands of the MOF@CF and MWNT/MOF@CF surfaces were upshifted since charge transfer was facilitated by the π–π interaction between MOF and the nucleation surface from sp 2 -hybridized aromatic regions of MWNT and CF. , Compared with CF-desized and MWNT@CF, the I D / I G values of MOF@CF and MWNT/MOF@CF were reduced, indicating the removal of amorphous carbon and the structural defect during the self-assembly of MOF and the hierarchical assembly of the MWNT/MOF hybrid structure.…”

Section: Resultsmentioning

confidence: 93%

“…Figure (a) shows UV–vis spectra of NDI and the MOF crystal powder. The absorption bands in the ranges of 240–260 nm (band I) and 300–370 nm (band II) correspond to π–π* transitions polarized along the y and z axes of the NDI chromophore . Compared to single NDI ligands, the red shift along with the decreasing intensity of band II suggested the face-to-face H-type stacking of NDI ligands after assembly …”

Section: Resultsmentioning

confidence: 99%

“…39−41 The G bands of the MOF@CF and MWNT/MOF@CF surfaces were upshifted since charge transfer was facilitated by the π−π interaction between MOF and the nucleation surface from sp 2 -hybridized aromatic regions of MWNT and CF. 37,41 Compared with CF-desized and MWNT@CF, the I D /I G values of MOF@CF and MWNT/MOF@CF were reduced, indicating the removal of amorphous carbon and the structural defect during the selfassembly of MOF and the hierarchical assembly of the MWNT/MOF hybrid structure.…”

Section: Preparation Of Various Cfsmentioning

confidence: 99%

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Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Sun

Yang

et al. 2022

Langmuir

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A metal–organic framework (MOF) based on a conjugated organic ligand and a transition-metal ion was designed and used to construct a novel multiwalled carbon nanotube (MWNT)/MOF interphase via hierarchical assembly on the carbon fiber (CF) surface and was compared to various interphases established by MWNT and MOF. An intertwined MWNT and MOF “jujube core” was randomly dispersed on MWNT@CF and MOF@CF surfaces, while interpenetrating structures with the MWNT network and MOF jujube core were simultaneously observed on MWNT/MOF@CF due to coordination bonds and π–π conjugation effects, which were derived from the MWNT template with carboxyl groups and sp2-hybridized domains as well as the secondary growth of MOF to promote self-assembly and the connection of MOF. The transverse fiber bundle test (TFBT) strength and interfacial shear strength (IFSS) of the MWNT/MOF@CF composite were 36.9, 6.1, and 20.8%, 16.3% higher than those of MWNT@CF and MOF@CF composites, which were attributed to the smoothed modulus transition of the stiffening interphase formed by the MWNT/MOF hybrid structure as “armor” to effectively buffer the stress transfer between a carbon fiber and the resin matrix. Compared to MWNT@CF and MOF@CF composites, MWNT/MOF@CF composites had the highest EMI shielding effectiveness, which was attributed to the combined effects of multiple reflections, conductive loss, and interface polarization from the interpenetrating MWNT/MOF hybrid structures, which realized the integration of the structure and function of the carbon fiber composites.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Preparation Of Various Cfsmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Sun

Yang

et al. 2022

Langmuir

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“…[ 8‐11 ] Several attempts have been made to develop high‐performance RTP materials, including the introduction of heavy atoms or halogen/hydrogen bonding, [ 12‐17 ] doping in a rigid matrix, [ 18‐26 ] construction of metal‐organic frameworks, [ 27‐28 ] and ionic‐π interactions. [ 29‐31 ] However, limited RTP materials with long emission wavelengths are reported due to the lack of a preparation strategy. Hence, potential applications of RTP materials for deep‐penetration in vivo bioimaging and detection are rare.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Organic Host‐Guest Materials with Bright Red Room‐Temperature Phosphorescence for Persistent Bioimaging^†

Zhao

Dai

et al. 2023

Chin. J. Chem.

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Comprehensive Summary Organic room‐temperature phosphorescence (RTP) materials have attracted immense attention in bioimaging due to their long emission lifetime and large Stokes shift. RTP materials with long emission wavelength can improve the penetration depth for bioimaging. However, the design of red persistent RTP materials is still challenging. In this study, a fused‐ring structure has been proposed to effectively decrease the triplet energy level, thus extending the emission wavelength of phosphorescence. In addition, the fused‐ring structure exhibits a high molar extinction coefficient (ɛ) and high luminescence efficiency due to the rigid structure. A new class of crystalline hosts (iminodibenzyl, IDB) are developed to stabilize the triplet excitons that are generated from the fused‐ring molecules. The maximum RTP wavelength of doping materials can reach 635 nm with a lifetime of 9.35 ms. Water‐disperse nanoparticles are successfully prepared for in vivo time‐resolved bioimaging, which eliminates the background fluorescence interference from biological tissues. These reveal a delicate design strategy for the construction of long‐wavelength emissive RTP materials for high‐resolution bioimaging.

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“…In particular, CB[ n ] ( n = 8 and 10) with a large cavity can specifically recognize more than one guest molecule to form a multicomponent host–guest complex, enabling the tunable multicolor photoluminescence . Meanwhile, with the development of room-temperature phosphorescent (RTP) materials, supramolecular phosphorescent materials based on host–guest interactions of CB[ n ]s have become a research hotspot in recent years …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Naphthalimide Derivatives and Their Luminescence upon Complexation with Cucurbit[n]uril Hosts

Wu,

Sun,

Han

et al. 2023

J. Org. Chem.

Self Cite

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A series of naphthalimide derivatives are synthesized and their binding behavior upon complexation with cucurbit[n]urils (CB[n]s) has been investigated. With a heavy atom (bromine) on the naphthalimide core, 4-bromo-1,8naphthalimide derivatives 1−4 show short room-temperature phosphorescence (RTP) lifetimes with low quantum yields. Their RTP properties are significantly enhanced in the presence of CB[8] or CB[10] both in aqueous solution and solid state owing to the efficient suppression of nonradiative decay and isolation of quenching factors by the rigid cavity of CB[n]. Without the bromine atom, 1,8-naphthalimide derivatives 5 and 6 show strong excimer emission upon complexation with CB[10] accompanied by fluorescence transition from blue to cyan. The fluorescence colors of 4-(dimethylamino)-1,8-naphthalimide derivatives 7 and 8 change from blue to white to yellow with the addition of CB[n]. This host−guest complexation strategy to modulate the luminescence of the luminophore would further broaden the application of luminescent materials.

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Red aqueous room-temperature phosphorescence modulated by anion–π and intermolecular electronic coupling interactions

Abstract: Aqueous room temperature phosphorescence (aRTP) from purely organic materials has been intriguing but challenging. In this article, we demonstrated that the red aRTP emission of 2Br-NDI, a water-soluble 4,9-dibromonaphthalene diimide...

Cited by 17 publications

References 48 publications

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Organic Host‐Guest Materials with Bright Red Room‐Temperature Phosphorescence for Persistent Bioimaging^†

Synthesis of Naphthalimide Derivatives and Their Luminescence upon Complexation with Cucurbit[n]uril Hosts

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Red aqueous room-temperature phosphorescence modulated by anion–π and intermolecular electronic coupling interactions

Abstract: Aqueous room temperature phosphorescence (aRTP) from purely organic materials has been intriguing but challenging. In this article, we demonstrated that the red aRTP emission of 2Br-NDI, a water-soluble 4,9-dibromonaphthalene diimide...

Cited by 17 publications

References 48 publications

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Organic Host‐Guest Materials with Bright Red Room‐Temperature Phosphorescence for Persistent Bioimaging†

Synthesis of Naphthalimide Derivatives and Their Luminescence upon Complexation with Cucurbit[n]uril Hosts

Contact Info

Product

Resources

About

Organic Host‐Guest Materials with Bright Red Room‐Temperature Phosphorescence for Persistent Bioimaging^†