欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为从微观上说明荧光物质与溶剂分子间的相互作用，采用荧光光谱研究了不同溶剂极性及质子溶剂对羟乙基纤维素（HEC）／Eu（Ⅲ）、甲基纤维素（MC）／Eu（Ⅲ）、羧甲基纤维素（CMC）／Eu（Ⅲ）配合物溶液荧光性能的影响．结果表明：随着H2O／CH3OH溶剂体系极性的增大，HEC／Eu（Ⅲ）配合物的激发态荧光体偶极矩发生较大的改变，导致荧光光谱波长向长波方向位移，其荧光强度变化则与更多因素有关；而质子溶剂H2O／HAc中质子浓度的增大使得MC／Eu（Ⅲ）配合物周围的溶剂笼产生重组，溶剂驰豫使其荧光光谱波长的Stokes位移增大；H2O／CH3COCH3溶剂体系极性的增强对CMC／Eu（Ⅲ）配合物Stokes位移的影响不明显，但会破坏该配合物分子内和分子间氢键的平衡，导致发光体结构的改变，从而使其荧光光谱的强度发生变化．
英文摘要：
The effects of solvent polarity and protonic solvent on the fluorescent properties of hydroxyethyl cellulose （HEC）/Eu（ Ⅲ ） , methyl cellulose （MC）/Eu（ Ⅲ ） and earboxymethyl cellulose （CMC）/Eu（Ⅲ ） complexes were investigated by fluorescent spectroscopy to reveal the interaction between the fluorescent substance and the solvent on the microcosmic level. The results show that （ 1 ） the dipole moment of HEC/Eu （Ⅲ） complex in the excited state greatly changes with the increase in the polarity of HEO/CH3OH solvent, which makes the fluorescent spectrum of HEC/Eu （Ⅲ ） complex, whose intensity depends on various factors, shifts to the long-wavelength side ; （2） the increase in the H ＋ concentration of H2O/HAc solvent results in a reorientation of the solvent cages around MC/ Eu （Ⅲ ） complex as well as a great Stokes shift of the fluorescent spectrum due to the solvent relaxation ; and （3） the increase in the polarity of HEO/CH3COCH3 solvent has no obvious effect on the Stokes shift of CMC/Eu（ Ⅲ） complex, but it may break the equilibrium between intra- and inter-molecular hydrogen bonds in the complexes, thus changing the structure of the fluorescent substance and the intensities of the fluorescent spectra .
同期刊论文项目
同项目期刊论文
Study of Starch Gelatinization in a Flow Field using Simultaneous Rheometric Data Collection and Mic
Comparative Study of Inactivation and Conformational Change of Lysozyme Induced by Pulsed Electric F
Purification and Characterization of a Novel Fibrinolytic Enzyme from Bacillus sp. Nov. SK006 Isolat
Effect of high pressure treatment on some physicochemical and functional properties of soy protein i
Specific and rapid detection of foodborne Salmonella by loop-mediated isothermal amplification metho
Analysis of genetic determinants involved in multi-resistance in clinical strains isolated from rena
Dehydration of concentrated Ganoderma lucidum extraction by combined microwave-vacuum and convention
Unnoticed Spread of Class 1 Integrons in Gram-positive Clinical Strains Isolated in Guangzhou, China
New array of aacA4-catB3-dfrA1 gene cassettes and a none-ORF cassette from a class 1 integron-positi
Study of thermal properties and heat-induced denaturation and aggregation of soy proteins by modulat
Purification and Partial Characterization of Lactobacillus Species SK007 Lactate Dehydrogenase (LDH)
Effect of thermal pretreatment of raw soymilk on the gel strength and microstructure of tofu induced
Acetylated Starch-based Biodegradable Materials with Potential Biomedical Applications as Drug Deliv
Distribution and characterization of integrons in various serogroups of Vibrio cholerae strains isol
Influence of transglutaminase-induced cross-linking on in vitro digestibility of soy protein isolate
Purification and characterization of L-arabinose isomerase from Lactobacillus plantarum producing D-
Usefulness of Sau-PCR for molecular epidemiology of nosocomial outbreaks due to Burkholderia cepacia
Effect of cross-linkage of POCI3 on invitrodigestibility and formation of enzyme resistant starch of
Loop-mediated isothermal amplification method for rapid detection of the toxic dinofagellate Alexand
Effect of processing parameters on the properties of transglutaminase-treated soy protein isolate fi
Nosocomial infection caused by class 1 integron-carrying Staphylococcus aureus in a hospital in Sout
Effect of high-intensity pulsed electric fields on the activity, conformation and self-aggregation o
期刊信息
位置：