研究目的
To achieve photo-responsiveness in a light-inert aqueous surfactant two-phase (ASTP) system by physically introducing a photo-trigger with the aid of a Trojan horse, enabling reversible modulation of phase behavior with light.
研究成果
The research successfully demonstrates a physical strategy to impart photo-responsiveness to a light-inert ASTP system using a Trojan horse approach. This method allows reversible phase transitions controlled by light, with potential applications in smart materials and separation processes. The strategy is generalizable and avoids complex covalent modifications.
研究不足
The study focuses on a specific ASTP system (SL/DBAB) and may require validation for other systems; the photo-responsiveness relies on the specific host-guest interactions and may be sensitive to environmental conditions like pH and temperature.
1：Experimental Design and Method Selection:
The study aims to introduce light-responsiveness into a light-inert ASTP system using a physical strategy involving a Trojan horse (host-guest complex of SL@β-CD) and a photo-trigger (azobenzene compound Azo). The design leverages host-guest interactions and the photo-isomerization of Azo to manipulate the molar ratio of surfactants in the ASTP.
2：Sample Selection and Data Sources:
Samples were prepared using sodium laurate (SL), dodecyl tributyl ammonium bromide (DBAB), β-cyclodextrin (β-CD), and synthesized 2-(4-(phenyldiazenyl)phenoxy)acetate sodium (Azo). Aqueous solutions were prepared with Milli-Q water. Concentrations were specified for various mixtures (e.g., SL/DBAB = 4 mM/4 mM for ASTP).
3：List of Experimental Equipment and Materials:
Reagents included SL (Sigma-Aldrich), DBAB (prepared by recrystallization), β-CD (Sinopharm Chemical Reagent Co.), Azo (synthesized as per reference), D2O (Cambridge Isotope Laboratories), and other chemicals from Beijing Chemical Reagents. Equipment included a UV lamp (model FC-100/F, 365 nm), transmission electron microscope (Jeol JEM 100CX), UV-vis spectrometer (TU-1810), dynamic light scattering instrument (Brookhaven Instruments Corporation with GXC-III laser), zeta potential analyzer (Malvern Instruments zeta sizer 2000), and NMR spectrometer (Bruker ARX 500 MHz).
4：Experimental Procedures and Operational Workflow:
Samples were prepared by mixing specified volumes of solutions to achieve final concentrations, incubated at 25°C for 48 hours for aggregate formation. pH was controlled using Na2B4O7?10H2O buffer. UV irradiation was applied for 4 hours using the UV lamp. Techniques included TEM (sample dipping on grids, air-drying, observation at 80 kV), UV-vis spectroscopy (recorded at room temperature), DLS (multiple angles, self-beating mode at 532 nm), zeta potential measurements (temperature-controlled), and 1H-NMR (using D2O solvent).
5：Data Analysis Methods:
Data were analyzed using instrument-specific software for UV-vis, DLS, zeta potential, and NMR. Phase behavior was assessed visually and via microscopy; binding interactions were studied through NMR spectral changes.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Transmission Electron Microscope
JEM 100CX
Jeol
Observe and image microstructures of samples, such as vesicles in ASTP phases
-
Zeta Potential Analyzer
zeta sizer 2000
Malvern Instruments
Measure zeta potential to assess surface charge of particles
-
NMR Spectrometer
ARX 500 MHz
Bruker
Perform 1H-NMR experiments to study host-guest interactions and molecular changes
-
Laser
GXC-III
CNI
Provide light source for DLS measurements
-
UV lamp
FC-100/F
Generate UV light at 365 nm for photo-isomerization of Azo compounds
-
UV-vis Spectrometer
TU-1810
Measure UV-vis absorption spectra to monitor dye separation and photo-isomerization
-
Dynamic Light Scattering Instrument
Brookhaven Instruments Corporation
Measure particle sizes and distributions in solutions using light scattering
-
登录查看剩余5件设备及参数对照表
查看全部
