Gamma-cyclodextrin (γ-CD) was used to induce the formation of N,N-diethylaniline (DEA) exciplex in 15:85{φ=0.15)v/v EtOH-H_2O binary mixture.Measurements of the fluorescence spectra of anthracene in the presence or ...Gamma-cyclodextrin (γ-CD) was used to induce the formation of N,N-diethylaniline (DEA) exciplex in 15:85{φ=0.15)v/v EtOH-H_2O binary mixture.Measurements of the fluorescence spectra of anthracene in the presence or absence of DEA and γ-CD show that γ-CD can form 1:1:1 host/guest-Ⅰ/guest-Ⅱ inclusion complex with anthracene and DEA.展开更多
The interactions between rutin or the inclusion complex of rutin-b-cyclodextrin and DNA were investigated by means of cyclic voltammetry, UV-vis absorption spectroscopy and fluorescence emission spectroscopy. The appa...The interactions between rutin or the inclusion complex of rutin-b-cyclodextrin and DNA were investigated by means of cyclic voltammetry, UV-vis absorption spectroscopy and fluorescence emission spectroscopy. The appar-ent binding constant of rutin with DNA is found to be 2.9×104 L/mol. The results showed that the ben-zopyranic-4-one plane of rutin mainly intercalated into DNA in the absence of b-cyclodextrin, while the catecholic portion of rutin was located in the double helix of DNA in the presence of b-cyclodextrin.展开更多
Ternary inclusion complexes β-cyclodextrin （β-CD）, rare earth metal ions （YbC13, YC13）, and 1,8-naphthalene- diamine/ 1,5-naphthalenediamine are synthesized in basic aqueous media, which are characterized via IH...Ternary inclusion complexes β-cyclodextrin （β-CD）, rare earth metal ions （YbC13, YC13）, and 1,8-naphthalene- diamine/ 1,5-naphthalenediamine are synthesized in basic aqueous media, which are characterized via IH NMR and IR spectroscopy. The stoichiometric proportion of β-CD ： YbC13 ： 1, 5-naphthalenedia- mine is 2：1：2, that of β-CD：YCI3 ： 1,8-naphthalenediamine is 2：1：1, and that of β-CD：YbC13 ： 1,8-naphthalenediamine is 2 ： 1 ： 1. The IR spectroscopy of the ternary inclusion complexes in the range of 935-1 000 cm 1 reveals the existence of the coordinate bond M---O or M---N. The possible conformations of the ternary inclusion complexes are depicted.展开更多
The encapsulation of essential oil components in cyclodextrins(CDs)to form inclusion complexes(ICs)is an effective strategy for improving their stability and bioaccessibility.The aim of the present study was to obtain...The encapsulation of essential oil components in cyclodextrins(CDs)to form inclusion complexes(ICs)is an effective strategy for improving their stability and bioaccessibility.The aim of the present study was to obtain a deeper understanding of the encapsulation behavior of multi-components inβ-CD.Guest molecules ofα-pinene,myrcene,and 3-carene,having the same molecular weight,formed ICs withβ-CD by a freeze-drying method.A simplex lattice mixture design with 28 experiments was carried out.Statistical analysis was applied to analyze the encapsulation behavior of guest components,and quantitative models of guest components in ICs were constructed by coupling with near-infrared(NIR)spectroscopy and chemometrics analysis.Besides,the molecular docking technique was used to obtain the optimal conformation and explain the binding behavior of inclusion.The results suggested that the spatial structure and ratio of guest molecules were the key factors affecting the encapsulation effect.A non-destructive and rapid NIR analytical model for the guest component in ICs could be obtained by second derivative(2nd der)pretreatment.Collectively,the encapsulation of guest components inβ-CD was differentiated,and NIR could be used as a rapid and non-destructive tool for quantitative analysis of ICs.展开更多
文摘Gamma-cyclodextrin (γ-CD) was used to induce the formation of N,N-diethylaniline (DEA) exciplex in 15:85{φ=0.15)v/v EtOH-H_2O binary mixture.Measurements of the fluorescence spectra of anthracene in the presence or absence of DEA and γ-CD show that γ-CD can form 1:1:1 host/guest-Ⅰ/guest-Ⅱ inclusion complex with anthracene and DEA.
基金Project supported by the National Natural Science Foundation of China (Nos. 90206037,20205007, 20075010).
文摘The interactions between rutin or the inclusion complex of rutin-b-cyclodextrin and DNA were investigated by means of cyclic voltammetry, UV-vis absorption spectroscopy and fluorescence emission spectroscopy. The appar-ent binding constant of rutin with DNA is found to be 2.9×104 L/mol. The results showed that the ben-zopyranic-4-one plane of rutin mainly intercalated into DNA in the absence of b-cyclodextrin, while the catecholic portion of rutin was located in the double helix of DNA in the presence of b-cyclodextrin.
基金Supported by the Project of Education Department of Liaoning Province (20040084)
文摘Ternary inclusion complexes β-cyclodextrin （β-CD）, rare earth metal ions （YbC13, YC13）, and 1,8-naphthalene- diamine/ 1,5-naphthalenediamine are synthesized in basic aqueous media, which are characterized via IH NMR and IR spectroscopy. The stoichiometric proportion of β-CD ： YbC13 ： 1, 5-naphthalenedia- mine is 2：1：2, that of β-CD：YCI3 ： 1,8-naphthalenediamine is 2：1：1, and that of β-CD：YbC13 ： 1,8-naphthalenediamine is 2 ： 1 ： 1. The IR spectroscopy of the ternary inclusion complexes in the range of 935-1 000 cm 1 reveals the existence of the coordinate bond M---O or M---N. The possible conformations of the ternary inclusion complexes are depicted.
基金National Natural Science Foundation of China (Grant No. 82003953)China Postdoctoral Science Foundation (Grant No. 2019M662278)+2 种基金Science and Technology Project of Education Department of Jiangxi Province (Grant No. GJJ190688, GJJ201252)Po stdoctoral Science Foundation of Jiangxi Province (Grant No. 2019KY42)Key Scientific Research Foundation of Jiangxi University of Traditional Chinese Medicine (Grant No. 2004/538200010402)。
文摘The encapsulation of essential oil components in cyclodextrins(CDs)to form inclusion complexes(ICs)is an effective strategy for improving their stability and bioaccessibility.The aim of the present study was to obtain a deeper understanding of the encapsulation behavior of multi-components inβ-CD.Guest molecules ofα-pinene,myrcene,and 3-carene,having the same molecular weight,formed ICs withβ-CD by a freeze-drying method.A simplex lattice mixture design with 28 experiments was carried out.Statistical analysis was applied to analyze the encapsulation behavior of guest components,and quantitative models of guest components in ICs were constructed by coupling with near-infrared(NIR)spectroscopy and chemometrics analysis.Besides,the molecular docking technique was used to obtain the optimal conformation and explain the binding behavior of inclusion.The results suggested that the spatial structure and ratio of guest molecules were the key factors affecting the encapsulation effect.A non-destructive and rapid NIR analytical model for the guest component in ICs could be obtained by second derivative(2nd der)pretreatment.Collectively,the encapsulation of guest components inβ-CD was differentiated,and NIR could be used as a rapid and non-destructive tool for quantitative analysis of ICs.
