By continuous catalyst modification and process innovation,the properties and applications of polyolefin have been extensively improved in recent *** the early 2000s,Spherizone process for producing polypropylene(PP)r...
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By continuous catalyst modification and process innovation,the properties and applications of polyolefin have been extensively improved in recent *** the early 2000s,Spherizone process for producing polypropylene(PP)resins was developed by Lyondell Basell based on multizone circulating reactor technology(MZCR),in which the polymer granules are
Carbonyl sulfide(COS)is an air pollutant and causes acid rain and damage of the *** is a heterocumulene and structurally analogue of CO2 and a resource of C=O or C=S ***,it is an ideal one-carbon(C1)building block for...
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Carbonyl sulfide(COS)is an air pollutant and causes acid rain and damage of the *** is a heterocumulene and structurally analogue of CO2 and a resource of C=O or C=S ***,it is an ideal one-carbon(C1)building block for synthesizing sulfur-containing *** contrast,traditional synthesis of sulfur-containing polymers are often involved in the condensation of thiols and phosgene and
N-methyladenosine（m6A）is the most prevalent and reversible internal modification in mammalian messenger RNAs（mR NAs）.About 1/4 of human mR NAs contain m6A modification and has recently been revealed to affect mRNA...
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N-methyladenosine（m6A）is the most prevalent and reversible internal modification in mammalian messenger RNAs（mR NAs）.About 1/4 of human mR NAs contain m6A modification and has recently been revealed to affect mRNA stability,splicing,export,and translation1.m6A is enriched in near stop codon and 3'UTR（3’untranslated region）of mR NA（Fig.1）,however,the fundamental question regarding
Living polymerizations allow for the synthesis of polymers with precisely controlled molecular weight,narrow molecular weight distribution,end-functionalized polymers,and well-defined block *** polypropylene(PP)is a t...
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Living polymerizations allow for the synthesis of polymers with precisely controlled molecular weight,narrow molecular weight distribution,end-functionalized polymers,and well-defined block *** polypropylene(PP)is a thermoplastic polymer used
Among the diverse technologies for the separation of enantiomeric composition of chiral compounds, high-performance liquid chromatography(HPLC) is the most widely used method, wherein the chiral stationary phase(CSP) ...
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Among the diverse technologies for the separation of enantiomeric composition of chiral compounds, high-performance liquid chromatography(HPLC) is the most widely used method, wherein the chiral stationary phase(CSP) plays a crucial role. In view of the particular backbone structure and a great deal of flexibility with respect to the molecular design and polymer synthesis. In this study we used poly(2-oxazoline) as scaffolds to construct a new kind of chiral selectors. As illustrated in Scheme 1, the employed protocol involves synthesis of well-defined poly(2-oxazoline) derivatives bearing different capping groups at the side chain by controlled/living cationic ring-opening polymerization followed by their grafting on silica bead matrices by means of thiol-ene "click'' chemistry. The chromatographic performance of the resulting columns was evaluated with ten racemic analytes. The preliminary results showed that the dimethylbenzoyl-group(DMB) containing CSP exhibited higher enantioseparation ability than the corresponding 3, 5-dinitrobenzoyl(DNB) and t-butyloxycarbonyl(BOC) counterparts.
Light trapping based on the localized surface-plasmon resonance(LSPR)effect of metallic nanostructures is a promising strategy to improve the device performance of organic solar cells(OSCs).We review recent advances i...
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Light trapping based on the localized surface-plasmon resonance(LSPR)effect of metallic nanostructures is a promising strategy to improve the device performance of organic solar cells(OSCs).We review recent advances in plasmonic-enhanced OPVs with solution-processed metallic nanoparticles(NPs).The different types of metallic NPs(sizes,shapes,and hybrids),incorporation positions,and NPs with tunable resonance wavelengths toward broadband enhancement are systematically summarized to give a guideline for the realization of highly efficient plasmonic photovoltaics.
In previous study, we have developed a class of poly(2-oxazoline) derivatives bearing L-prolinamide moiety in the side chain and their application in aldol reactions. The polymeric organocatalyst(Cat-1) proved to be h...
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In previous study, we have developed a class of poly(2-oxazoline) derivatives bearing L-prolinamide moiety in the side chain and their application in aldol reactions. The polymeric organocatalyst(Cat-1) proved to be highly efficient for the asymmetric aldolisation of cyclic ketones with several aromatic aldehydes under neat conditions. With the objective of constructing biomimetic catalytic systems capable of operating in aqueous media, we report herein the synthesis of novel amphiphilic copolymers which incorporate the watersoluble 2-ethyl-2-oxazoline(Et OX) segment into polymer matrices. As anticipated, these copolymers could self-assemble into micellar aggregates in water, in which higher diastereo-and enantioselectivities have been achieved in the representative aldol addition of cyclohexanone to 4-nitrobenzaldehyde compared to their homopolymeric counterpart, as shown in Table. Additionally, catalyst recovery and reuse is possible by simple centrifugation after each cycle.
The stimuli-responsive nanomaterials are gaining more and more interest in the biological field,including cell imaging and biosensing etc. Nanomaterials in response to the bio-relevant stimuli(i.e., p H, enzymes and o...
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The stimuli-responsive nanomaterials are gaining more and more interest in the biological field,including cell imaging and biosensing etc. Nanomaterials in response to the bio-relevant stimuli(i.e., p H, enzymes and other bioactive molecules) can be utilized to enhance imaging(i.e., optical imaging, MRI, and multi-mode imaging) sensitivity via disease site-specific delivery and controlled release, which helps to diagnose cancer at an early stage or to monitor progression during treatment. In the triggered responsive process, smart nanomaterials undergo changes in physiochemical properties that can cause cytotoxicity or influence on cell functions due to the interactions between nanomaterials and cells. In order to promote the design and fabrication of effective platforms for therapeutics and diagnostics, special attention should be paid to these effects. By taking the advantages of intracellular stimuli, the controlled self-assembly in living cells can be achieved, which has been used for various in situ detections and insights into biological self-assembly. In this review, the recent advances in cell imaging, cytotoxicity and self-assembly of intracellular stimuli-responsive nanomaterials are summarized. Some principles for the further design and applications of intracellular stimuli-responsive nanomaterials and future perspectives are discussed.
In the past decade, chiral recognition of biologically related organic molecules has been extensively explored. However, the development of highly selective chemosensors for enantioselective differentiation of underiv...
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In the past decade, chiral recognition of biologically related organic molecules has been extensively explored. However, the development of highly selective chemosensors for enantioselective differentiation of underivatized amino acids in water still remains a challenge. Herein, we report a novel circular dichroism（CD） method to probe α-amino acids based on a water-soluble poly（2-oxazoline） derivative（POX-2）. Upon addition of basic amino acids such as histidine, lysine or arginine, strong induced CD signals with signs related to the absolute configuration of the guest molecules were observed in the presence of Cu. We have demonstrated that this selective CD probe possesses a higher sensitivity for histidine and a detection limit in the micromolar range.
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