肉桂酸疏水改性透明质酸的聚集及其光谱性质

O647.2; 通过肉桂酸(CA)与透明质酸(HA)的酯化反应,制备了肉桂酸疏水改性透明质酸(CA-HA).使用表面张力、芘荧光探针、动态光散射和Zeta电位方法研究了CA-HA在水溶液表面和溶液中的聚集性质.紫外光照射后,CA-HA在 250～325 nm处的紫外吸收未出现明显蓝移,说明CA-HA能够抑制CA接枝基团的光异构化,使CA接枝基团保持反式构型.除了CA接枝基团的荧光发射峰外,CA-HA在 350～500 nm处还出现了CA接枝基团二聚体的荧光发射峰.随着质量浓度增大,CA-HA能够产生明显增强的聚集诱导荧光.同时,CA-HA乳液在紫外线B(UVB)波段(275～320 nm)具有...

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Published in	华东理工大学学报（自然科学版） Vol. 50; no. 3; pp. 371 - 376
Main Authors	包舟杰, 王小永
Format	Journal Article
Language	Chinese
Published	华东理工大学化学与分子工程学院,上海 200237 01.06.2024
Subjects	疏水改性 UV absorption 透明质酸荧光发射紫外吸收 aggregation fluorescence emission hydrophobic modification 聚集 hyaluronic acid
Online Access	Get full text
ISSN	1006-3080
DOI	10.14135/j.cnki.1006-3080.20230307001

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Abstract	O647.2; 通过肉桂酸(CA)与透明质酸(HA)的酯化反应,制备了肉桂酸疏水改性透明质酸(CA-HA).使用表面张力、芘荧光探针、动态光散射和Zeta电位方法研究了CA-HA在水溶液表面和溶液中的聚集性质.紫外光照射后,CA-HA在 250～325 nm处的紫外吸收未出现明显蓝移,说明CA-HA能够抑制CA接枝基团的光异构化,使CA接枝基团保持反式构型.除了CA接枝基团的荧光发射峰外,CA-HA在 350～500 nm处还出现了CA接枝基团二聚体的荧光发射峰.随着质量浓度增大,CA-HA能够产生明显增强的聚集诱导荧光.同时,CA-HA乳液在紫外线B(UVB)波段(275～320 nm)具有良好的防晒性能.
AbstractList	O647.2; 通过肉桂酸(CA)与透明质酸(HA)的酯化反应,制备了肉桂酸疏水改性透明质酸(CA-HA).使用表面张力、芘荧光探针、动态光散射和Zeta电位方法研究了CA-HA在水溶液表面和溶液中的聚集性质.紫外光照射后,CA-HA在 250～325 nm处的紫外吸收未出现明显蓝移,说明CA-HA能够抑制CA接枝基团的光异构化,使CA接枝基团保持反式构型.除了CA接枝基团的荧光发射峰外,CA-HA在 350～500 nm处还出现了CA接枝基团二聚体的荧光发射峰.随着质量浓度增大,CA-HA能够产生明显增强的聚集诱导荧光.同时,CA-HA乳液在紫外线B(UVB)波段(275～320 nm)具有良好的防晒性能.
Abstract_FL	A hydrophobically modified hyaluronic acid(CA-HA)was prepared by the esterification reaction of the carboxyl group of cinnamic acid(CA)with the hydroxyl group of hyaluronic acid(HA).The maximum solubility of CA-HA in the aqueous solution was determined to be 4.0 mg/mL by the UV standard curve method.Surface tension,fluorescence,dynamic light scattering and Zeta potential were used to study the aggregation properties of CA-HA on the surface of an aqueous solution and in the solution.CA-HA can reduce the surface tension of the aqueous solution to 32 mN/m,forming aggregates with a particle size of 236 nm and a Zeta potential of-44.8 mV in aqueous solution.After UV irradiation,compared to CA alone,the UV absorbance of CA-HA at 250-325 nm doesn't show a significant blue shift,which suggests that the side chain of HA can inhibit the photoisomerization of CA probably through a steric effect.In addition to the fluorescence of monomeric CA,CA-HA exhibits fluorescence emission over a spectral range of 350-500 nm,characteristic of dimeric CAs.A significantly enhanced aggregation-induced fluorescence emission is observed when the concentration of CA-HA increases.A CA-HA emulsion is shown to have good sunscreen performance in the UVB band(275-320 nm).
Author	包舟杰王小永
AuthorAffiliation	华东理工大学化学与分子工程学院,上海 200237
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Author_FL	BAO Zhoujie WANG Xiaoyong
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Title	肉桂酸疏水改性透明质酸的聚集及其光谱性质
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