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Synthesis, Solid-State Structures, and Molecular Recognition of Chiral Molecular Tweezer and Related Structures Based on a Rigid Bis-Naphthalene Cleft.
The rigid and nonchiral bis-naphthalene cleft was used for the first time as a scaffold to build a chiral molecular
tweezer. The molecular tweezer and its related compounds have been synthesized and carefully characterized by X-ray crystallography and NMR spectroscopy. Their solid-state structures and molecular recognition properties have also been studied.
http://www.polymer.cnt//ss/hezhenfeng/publicationsshow_9190.html |
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Probing the Two-Stage Transition upon Crossing the Glass Transition of Polystyrene by Solid-State NMR
A two-stage transition upon crossing the glass transition of polystyrene with increasing temperature was precisely determined and
interpreted by using solid-state nuclear magnetic resonance (SSNMR), 1H-1H dipolar couplings based Double
Quantum-Filtered (DQF) and dipolar filter (DF) experiment and 13C
Chemical Shift Anisotropy (CSA) based centerband-only detection of exchange (CODEX) experiment ar...
http://www.polymer.cnt//ss/sunpingchuan/publicationsshow_9032.html |
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Phase cycling schemes for finite-pulse-RFDR MAS solid state NMR experiments
The finite-pulse radio frequency driven dipolar recoupling (fp-RFDR) pulse sequence is used in 2D homonuclear chemical shift correlation experiments under magic angle spinning (MAS). A recent study demonstrated the advantages of using a short phase cycle, XY4, and its super-cycle, XY414, for the fp-RFDR pulse sequence employed in 2D 1H/1H single-quantum/single-quantum correlation experiments under...
http://www.polymer.cnt//ss/sunpingchuan/publicationsshow_9030.html |
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Heterogeneous Structure and Miscibility of Phenylboronic Acid-Rich Chitosan Nanoparticles as Revealed by Advanced Solid-State NMR
By using advanced solid-state NMR techniques, the heterogeneous structure and inter-polymer miscibility of chitosan-poly (N-3-acrylamidophenyl-boronic acid) nanoparticles
(CS-PAPBA NPs) were investigated. The 13C CPMAS experiments indicate the conformational
change of chitosan when incorporated with phenyl boronic acid. Two-dimensional (2D) 13C-1H HETCOR experiments further demonstrate that a port...
http://www.polymer.cnt//ss/sunpingchuan/publicationsshow_9028.html |
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Skin thermal stimulation on touching cool fabric from the transient stage to steady-state stage
This study investigated the whole process of skin thermal stimulation upon contacting a cool fabric using a two-layer fabric piece as an example. This process of heat transfer in our model, considering the influence of both external environmental conditions and the skin structure, was analyzed in both transient and steady-state stages sequentially. Three predictive parameters, the heat flux peak q...
http://www.polymer.cnt//ss/qulijun/publicationsshow_8906.html |
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Effects of layering sequence on thermal response of multilayer fibrous materials: Unsteady-state cases
Heat transfer between multilayer fibrous materials under unsteady-state conditions is regarded as an intricate and unpredictable process, and the system thermal response with different layer stacking sequences is investigated in this paper. All six possible sequences for three-layer fabrics are measured by an apparatus set up in our lab and simulated by the finite element method, taking account of...
http://www.polymer.cnt//ss/qulijun/publicationsshow_8899.html |
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Effects of layering sequence on thermal response of multilayer fibrous materials: Unsteady-state cases
Heat transfer between multilayer fibrous materials under unsteady-state conditions is regarded as an intricate and unpredictable process, and the system thermal response with different layer stacking sequences is investigated in this paper. All six possible sequences for three-layer fabrics are measured by an apparatus set up in our lab and simulated by the finite element method, taking account of...
http://www.polymer.cnt//ss/qulijun/publicationsshow_8898.html |
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219. Porous graphene–carbon nanotube hybrid paper as a flexible nano-scaffold for polyaniline immobilization and application in all-solid-state supercapacitors.
Polyaniline (PANI) has been recognized as an ideal candidate for electrode materials in supercapacitors. However, the relatively low electrical conductivity and poor cyclic stability severely limit its potential applications. Therefore, a proper substrate with carefully designed nanostructures for PANI immobilization is highly desirable for realizing its full performance. In this study, three-dime...
http://www.polymer.cnt//ss/liutianxi/publicationsshow_8226.html |
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217. Electrospun polymer nanofiber membrane electrodes and an electrolyte for highly flexible and foldable all-solid-state supercapacitors.
A sandwiched symmetric all-solid-state supercapacitor consisting of flexible electrospun polyaniline (PANI)/carbonized polyimide (CPI) nanocomposite membrane electrodes and a poly(vinyl alcohol) (PVA)/poly(acrylic acid) (PAA) nanofiber membrane-reinforced PVA/H3PO4 gel separator has been successfully fabricated. Needle-like PANI nanoparticles are vertically formed on the high electrically conducti...
http://www.polymer.cnt//ss/liutianxi/publicationsshow_8123.html |
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Probing the Nanostructure, Interfacial Interaction and Dynamics of Chitosan-Based Nanoparticles by Multiscale Solid-State NMR
Chitosan-based nanoparticles (NPs) are widely used in drug and gene delivery, therapies and medical imaging, but a molecular-level understanding of the internal morphology and nanostructure size, interface and dynamics, which is critical for building fundamental knowledge for the precise design and efficient biological application of the NPs, remains a great challenge. Therefore, the availability ...
http://www.polymer.cnt//ss/sunpingchuan/publicationsshow_7847.html |
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