Intermolecular-charge-transfer-induced fluorescence quenching in protic solvent

Lin, T. P.; Liu, Xiaojun; Lou, Zhidong; Hou, Yanbing; Teng, Feng

doi:10.1016/j.molstruc.2016.06.021

Cited by 8 publications

(5 citation statements)

References 37 publications

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“…In contrast, a fluorescence turn-on detection system could effectively avoid the solvent quenching effect and background interference of fluorescence caused by the sample and the matrix. 28 were frequently utilized as fluorescent materials in the turn-on mode for the fluorescent enzyme-linked immunosorbent assay (ELISA) 29 because of their cheap and simple signal generation process.…”

Section: Introductionmentioning

confidence: 99%

“…Although the turn-off mode is the most commonly utilized pattern for its excellent performance, the fluorescence signals in this mode were often interfered by high background values. In contrast, a fluorescence turn-on detection system could effectively avoid the solvent quenching effect and background interference of fluorescence caused by the sample and the matrix . Ascorbic acid 2-phosphate (AA2P) and o -phenylenediamine (OPD) were frequently utilized as fluorescent materials in the turn-on mode for the fluorescent enzyme-linked immunosorbent assay (ELISA) because of their cheap and simple signal generation process.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Modal Immunosensor with Functionalized Gold Nanoparticles for Ultrasensitive Detection of Chloroacetamide Herbicides

Zha

et al. 2021

ACS Appl. Mater. Interfaces

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Convenient and ultrasensitive detection of pesticides is demanded for healthcare and environmental monitoring, which can be realized with a dual-modal strategy. In this paper, based on a biotin-labeled IgG-modified gold nanoparticle (AuNP@IgG-bio) probe, a dual-modal immunosensor was proposed for detecting chloroacetamide herbicides. This platform is relied on the dephosphorylation of ascorbic acid 2-phosphate (AA2P) by alkaline phosphatase (ALP). In addition to this process, ascorbic acid (AA)-triggered deposition of silver on gold nanostars (AuNSs) and the fluorogenic reaction of dehydrogenated AA and o-phenylenediamine (OPD) occur sequentially. Thus, the dual readout of the color change of red-green-blue (RGB) and fluorescence generation in situ induced by crystal growth can be used. The limits of detection (LODs) were as low as 1.20 ng/mL of acetochlor (ATC), 0.89 ng/mL of metolachlor, 1.22 ng/mL of propisochlor, and 0.99 ng/mL of their mixture by a smartphone and 0.44 ng/mL of ATC, 1.59 ng/mL of metolachlor, 2.80 ng/mL of propisochlor, and 0.72 ng/mL of their mixture by a spectrofluorometer. The recoveries from corn were 91.4–105.1% of the colorimetric mode and 92.4–106.2% of the fluorescent mode. Due to its simple observation mode and good performance, this dual-modal immunosensor possesses considerable application prospects.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-Modal Immunosensor with Functionalized Gold Nanoparticles for Ultrasensitive Detection of Chloroacetamide Herbicides

Zha

et al. 2021

ACS Appl. Mater. Interfaces

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“…This observation is a result of the π-π stacking interactions between carboxylated pillar [5]arene and F16, which can also be interpreted as a host-guest-type self-assembly. [60][61][62] As a control experiment, optimized condition for the for the formation of coassembled nanoparticles between NP-3 and CP-AuNPs with the host-guest interaction by aging time was determined by UV-vis spectroscopy ( Figure 2D). According to the UV-vis data, the formation of coassembled nanoparticles between CP-AuNPs and NP-3, which was assumed to result from the host-guest interactions between the pillar [5]arene group of CP-AuNPs and NP-3, was complete within 30 min.…”

Section: Resultsmentioning

confidence: 99%

Coassembled Nanoparticles Composed of Functionalized Mesoporous Silica and Pillar[5]arene‐Appended Gold Nanoparticles as Mitochondrial‐Selective Dual‐Drug Carriers

Ahn

Jin

Park

et al. 2020

Part & Part Syst Charact

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Coassembled nanoparticles composed of functionalized mesoporous silica and pillar[5]arene‐appended Au nanoparticles obtained through the formation of a host–guest complex are designed and synthesized as a mitochondrial‐selective dual‐drug delivery system. A pyridinium‐based ligand and fluorescein isothiocyanate are immobilized onto mesoporous silica to act as the mitochondria‐targeting ligand and fluorescence tracker, respectively, of a material dubbed NP‐3. Carboxylated pillar[5]arene‐capped Au nanoparticles (CP‐AuNPs) are fabricated by the templated reduction of Au3+. Interestingly, coassembled nanoparticles (NP‐1) composed of doxorubicin (DOX) loaded NP‐3 and CP‐AuNPs are then prepared via the formation of a host–guest complex between the pyridinium‐based ligand of NP‐3 and the pillar[5]arene of CP‐AuNPs. To demonstrate the effectiveness of NP‐2 and NP‐1 as mitochondrial targeting drug delivery systems, DOX and F16 are employed as model drugs. These drugs loaded onto NP‐2 and CP‐AuNPs, respectively, are selectively delivered to mitochondria, indicating the usefulness of NP‐2 and CP‐AuNPs as mitochondrial‐specific drug‐delivery carriers in cancer cells. More interestingly, the use of NP‐1 is also associated with the selective accumulation of DOX and F16 in mitochondria. The selective mitochondrial‐targeting of NP‐1 is possible by NP‐2 and F16 exposed to the cytoplasm, allowing the codelivery of the two drugs to the mitochondria.

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“…The first reason could be attributed to the absence of fluorescent luminescent factors. Secondly, it may be a result of either direct energy transfer between fluorescent and quenching molecules or the absorption of fluorescence emission, known as fluorescence quenching [ 28 , 29 , 30 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

Improving the Autofluorescence of Lophira alata Woody Cells via the Removal of Extractives

Yu,

Xu,

et al. 2023

Polymers

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The autofluorescence phenomenon is an inherent characteristic of lignified cells. However, in the case of Lophira alata (L. alata), the autofluorescence is nearly imperceptible during occasional fluorescence observations. The aim of this study is to investigate the mechanism behind the quenching of lignin’s autofluorescence in L. alata by conducting associated experiments. Notably, the autofluorescence image of L. alata observed using optical microscopy appears to be quite indistinct. Abundant extractives are found in the longitudinal parenchyma, fibers, and vessels of L. alata. Remarkably, when subjected to a benzene–alcohol extraction treatment, the autofluorescence of L. alata becomes progressively enhanced under a fluorescence microscope. Additionally, UV–Vis absorption spectra demonstrate that the extractives derived from L. alata exhibit strong light absorption within the wavelength range of 200–500 nm. This suggests that the abundant extractives in L. alata are probably responsible for the autofluorescence quenching observed in the cell walls. Moreover, the presence and quantity of these extractives have a significant impact on the fluorescence intensity of lignin in wood, resulting in a significant decrease therein. In future studies, it would be interesting to explore the role of complex compounds such as polyphenols or terpenoids, which are present in the abundant extractives, in interfering with the fluorescence quenching of lignin in L. alata.

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Intermolecular-charge-transfer-induced fluorescence quenching in protic solvent

Cited by 8 publications

References 37 publications

Dual-Modal Immunosensor with Functionalized Gold Nanoparticles for Ultrasensitive Detection of Chloroacetamide Herbicides

Dual-Modal Immunosensor with Functionalized Gold Nanoparticles for Ultrasensitive Detection of Chloroacetamide Herbicides

Coassembled Nanoparticles Composed of Functionalized Mesoporous Silica and Pillar[5]arene‐Appended Gold Nanoparticles as Mitochondrial‐Selective Dual‐Drug Carriers

Improving the Autofluorescence of Lophira alata Woody Cells via the Removal of Extractives

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