Study on the inclusion interactions of berberine hydrochloride and cucurbit[7] by spectrofluorimetry

Li, Yan Ping; Wu, Hao; Du, Lei

doi:10.1016/j.cclet.2008.10.045

Cited by 24 publications

(8 citation statements)

References 8 publications

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“…The dramatic quenching of the fluorescence intensity determined to be F = 0.67787C + 28.82636, and using CB [7]/PAL as the probe was determined to be F = 0.53867C + 5.61581. In addition, the apparent association constants of the CB [7] interaction with BRH and PAL were 9.57 × 10 4 L mol −1 and 3.05 × 10 5 L mol −1 by the same calculation method [19], respectively. Therefore, the F of CB [7]/BRH exhibited higher signals than CB [7]/PAL.…”

Section: The Fluorescence Quenching Of Cb[7]/isoquinoline Alkaloid Bymentioning

confidence: 99%

“…However, significant increases in fluorescence intensity were observed when CB [7] was added to the alkaloid solutions [19]. The dramatic quenching of the fluorescence intensity determined to be F = 0.67787C + 28.82636, and using CB [7]/PAL as the probe was determined to be F = 0.53867C + 5.61581.…”

Section: The Fluorescence Quenching Of Cb[7]/isoquinoline Alkaloid Bymentioning

confidence: 99%

“…In our laboratory, we embarked on investigations on the supramolecular interactions of the CB[n]/isoquinoline alkaloid complex and its application in molecular recognition and the determination of isoquinoline alkaloids utilizing its excellent optical properties [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Determination of ethambutol by a sensitive fluorescent probe

Wang

Yang

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: The Fluorescence Quenching Of Cb[7]/isoquinoline Alkaloid Bymentioning

confidence: 99%

Section: The Fluorescence Quenching Of Cb[7]/isoquinoline Alkaloid Bymentioning

confidence: 99%

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Determination of ethambutol by a sensitive fluorescent probe

Wang

Yang

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…When guest molecules are conned in the cucurbituril macrocycle, their chemical and spectroscopic properties might be changed. 30,31 However, CB [7] is individually interesting because of its high water solubility and intermediary cavity size (7.3 Å at the equator, 5.4 Å at both carbonyl-fringed portals and about 9 Å in length). In CB [7], the carbonyl-fringed portals have a signicant negative charge density, which facilitates the binding of species such as molecular cations and metal ions.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of H2S molecules by cucurbit[7]uril: an ab initio vdW-DF study

Ganji

Danesh

2013

RSC Adv.

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Among the cucurbit[n]urils, much attention has been devoted to CB[7] for its intermediary cavity size as well as the significant negative charge density of carbonyl-fringed portals which assists the binding of other species. Adsorption of hydrogen sulfide by CB [7] was studied using ab initio van der Waals density functional (vdW-DF) calculations, involving a full geometry optimization. The encapsulation of up to five H 2 S molecules inside the cucurbit cavity, with a binding energy of about À0.10 eV per H 2 S, makes cucurbit[n]urils attractive as a suitable adsorption medium. Furthermore, calculations show that H 2 S molecules can be adsorbed on the sidewall of the CB[7] with a larger binding energy (À0.31 eV). We also address the role of vdW forces for the system under study and the obtained results revealed that the inclusion of dispersion interactions slightly affects the binding properties of the interacting molecules. In addition, the binding nature of the energetically favorable systems in ambient conditions have been investigated with ab initio MD simulations adopting the vdW-DF method. Our ab initio vdW-DF findings afford evidence for a realistic benchmark for the applicability of these novel nanostructures for H 2 S adsorption and elimination from various media.

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“…Spectrofluorimetric method has been extensively utilized in biological samples and dosage forms. It was based on berberine intrinsic fluorescence enhanced by the formation of an inclusion complex of berberine with butylated‐β‐cyclodextrin or cucurbit,6, 7 or based on quenching of the fluorescence of thioglycolic acid‐capped CdTe quantum dots (TGA‐CdTe QDs) by berberine in aqueous solution 8. Liquid chromatography using tandem mass spectrometry (MS/MS) or electrospray ionization–mass spectrometry (LC–ESI–MS) as detector was used in rat or human plasma 9, 10.…”

Section: Introductionmentioning

confidence: 99%

Determination of berberine in pharmaceutical preparations using acidic hydrogen peroxide–nitrite chemiluminescence system

Liang¹,

Yu²

2011

Drug Testing and Analysis

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A stronger chemiluminescence (CL) was observed when hydrogen peroxide was mixed with nitrite and berberine in sulfuric acid solution. The stronger CL originated from peroxidation of berberine by peroxynitrous acid that was synthesized online by the mixing of acidic hydrogen peroxide solution with nitrite solution in a flow system. The emitting species was excited state oxyberberine, a peroxidized product of berberine. Based on the stronger CL, a flow injection CL method for the determination of berberine was proposed. Under optimum experimental conditions, the stronger CL intensity was linearly related to the concentration of berberine over the range of 2.0 × 10(-7) -2.0 × 10(-5) mol L(-1) . The limit of detection (s/n = 3) was 6.2 × 10(-8) mol L(-1) . The proposed method has been evaluated by analyzing berberine in pharmaceutical preparations.

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Study on the inclusion interactions of berberine hydrochloride and cucurbit[7] by spectrofluorimetry

Cited by 24 publications

References 8 publications

Determination of ethambutol by a sensitive fluorescent probe

Determination of ethambutol by a sensitive fluorescent probe

Adsorption of H2S molecules by cucurbit[7]uril: an ab initio vdW-DF study

Determination of berberine in pharmaceutical preparations using acidic hydrogen peroxide–nitrite chemiluminescence system

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