Thermoresponsive amphiphilic poly(ε-caprolactone)s (PCL)s are excellent candidates for drug delivery due to their biodegradability, biocompatibility, and controlled release. However, the thermoresponsivity of modified PCL can often lead premature release because lower critical solution temperature (LCST) is close physiological conditions. To address this issue, we developed a novel approach that involves functionalizing redox-responsive lipoic acid hydrophobic block PCL. Lipoic has disulfide...

Amphiphilic diblock copolymers are used in drug delivery systems for cancer treatments. However, these carriers suffer from lower loading capacity, poor water solubility, and non-targeted release. Here, we utilized a computational approach to analyze the effect of functional groups hydrophobic block on drug-polymer interactions. To design effective carriers, four different amphiphilic copolymer micelles with distinct aromatic heteroaromatic at core were subjected molecular dynamics...

A novel strategy for the difunctionalization of styrenes was developed. This synthesis includes use electrophilic perfluoroalkyl and tert-butylperoxy radicals produces (1-(tert-butylperoxy)-2-perfluoroalkyl)ethylbenzene at room temperature, which has been traditionally difficult to synthesize. With least four radical species included in transformation, its high chemoselectivity extraordinary; results were further elucidated using computational studies. The methodology also holds a good...

The two rare-earth-metal dialkyl complexes 1 and 2 (1, Ln = Sc; 2, Lu) were obtained via the same acid–base reaction between 1,3-bis(2-pyridylimino)isoindoline (BPI) ligand trialkyl complexes. These structurally characterized by X-ray diffraction. Both in solid state solution state, mononuclear Sc complex 1, containing one monoanionic tridentate C2-symmetric pincer-type BPI ligand, adopts a distorted-trigonal-bipyramidal configuration. When center of was replaced larger Lu center,...

Research on the consistency of suspended particulate matter (SPM) concentration retrieved from multisource satellite sensors can serve as long-time monitoring water quality. To explore influence atmospheric correction (AC) algorithm and retrieval model SPM values, Landsat 8 Operational Land Imager (OLI) Sentinel 2 MultiSpectral (MSI) images acquired same day are used to compare remote sensing reflectance (Rrs) values in two high-turbidity lakes. An for Shengjin Lake is established based...

This review discusses various neodymium catalysts for stereospecific polymerization of dienes, vinyl monomers, and ε-caprolactone.

An efficient synthesis of Z-perfluoroalkyl-substituted enones by a multicomponent reaction strategy has been described. A variety elusive perfluoroalkylated are furnished under mild conditions in good yields with unique chemo- and stereoselectivity. sequence radical-mediated Kornblum-DeLaMare reaction, Michael addition, HF elimination is proposed for the mechanism.

A simple and efficient method has been developed for the preparation of primary oxamates α-ketoamides through oxidative coupling diazo compounds NH4I. Under optimized reaction conditions, a range diazoesters α-diazoketones was explored, corresponding products were obtained in moderate to good yields. This protocol is metal-free, performed under mild wide substrate scope, offers operational simplicity.

ABSTRACT Isoprene polymerization and copolymerization with ethylene can be carried out by using cationic half‐sandwich fluorenyl scandium catalysts in situ generated from dialkyl complexes Flu'Sc(CH 2 SiMe 3 ) (THF) n , activator, Al i Bu under mild conditions. In the isoprene polymerization, all of these exhibit high activities (up to 1.89 × 10 7 g/mol Sc h) mainly cis −1,4 selectivities 93%) similar contrast, showed different regio‐/stereoselectivities being significantly dependent on...

Abstract Using cyanoacetic acid as a masked electrophile, new cyanomethylation reaction of amines and carboxylic acids was developed, producing variety α ‐aminonitriles cyanomethyl esters with good yields excellent functionality tolerance. This protocol features simple manipulation, inexpensive reagents, wide substrate scope. Iodoacetonitrile generated in situ from the iodination–decarboxylation this transformation.

Herein, a novel Cu-catalyzed four-component cascade reaction, which encompasses styrenes, diazo reagents, amines, and <italic>tert</italic>-butyl hydroperoxide (TBHP), was well developed toward β-ester-γ-amino ketones, showed high chemoselectivity.

Multiphysics field coupling analysis requires that the electromagnetic and thermal performance be analyzed simultaneously. In this article, based on lumped parameter network (LPTN) are coupled. This method can give a more accurate evaluation of at design stage. Take 7500 r/min, 4.5 kW permanent magnet (PM) rectifier generator as an example: after designing model by finite element (FEM) LPTN model, respectively, coupled temperature-dependent material properties. Experiment shows error...

A group of chalcogenopheno[3,2-b]pyrroles, including thieno[3,2-b]pyrrole (TP), furo[3,2-b]pyrrole (FP), and selenopheno[3,2-b]pyrrole (SeP), thieno[3,2-b]thiophene (TT) electron-donating units were coupled with a thiophene-flanked diketopyrrolo[3,4-c]pyrrole (ThDPP) acceptor to generate four donor-acceptor-donor (D-A-D) semiconducting small molecules (ThDPP-TT, ThDPP-FP, ThDPP-TP, ThDPP-SeP). This study systematically investigated the differences between chalcogenopheno[3,2-b]pyrroles TT....

A coupling reaction between sulfonyl radicals and silver-based carbenes has been well established. This simple radical-carbene (RCC) process provided an efficient approach to a variety of β-carbonyl arylsulfones from sodium arylsulfinates diazo compounds, was characterized by wide substrate scope, easy scale-up, manipulation, accessible starting materials, mild conditions.

1,4-Copolymerization of 1,3-cyclohexadiene with isoprene and terpolymerization styrene have been achieved by cationic half-sandwich fluorenyl rare-earth metal species.

Abstract Three carbohydrate‐modified polysiloxane bola surfactants (ATPS‐GA) were synthesized using a two‐step method. Their chemical structures characterized by infrared spectroscopy (FT‐IR) and proton nuclear magnetic resonance ( 1 H NMR). surface properties aggregation in aqueous solution determined tension measurements transmission electron microscopy (TEM). Surface measurement results indicated that the three are under 25 mN m −1 , much lower than those of conventional hydrocarbon due...

Application of the Langmuir probe in plasma circumstance for deposition diamond-like carbon (DLC) thin films usually faces problem rapid failure due to surface insulative coating. In this paper, we circumvent by using floating harmonic technique. real DLC film deposition, worked reliably over 3 hours, correctly indicating ion density and electron temperature. The technique was practically used measure temperature processes microwave ECR enhanced sputtering. Combined with Raman spectroscopic...

In this communication, an unprecedented interception of Cn F2n+1 (O)SO. radical with a copper-based carbene has been established. Distinguished by wide substrate scopes and mild reaction conditions, novel radical-carbene coupling (RCC reaction) provides fundamentally different mechanistically interesting strategy for the synthesis perfluoroalkanesulfinate esters.

ABSTRACT A series of new mononuclear neutral and water‐soluble cationic rhodium (Rh) complexes bearing strong π‐acidic dibenzo[ a , e ]cyclooctatetraene (dbcot) diene ligand have been synthesized structurally characterized. In the polymerization phenylacetylene, dbcot Rh complex exhibits higher catalytic activity than corresponding cod‐based in both organic solvent aqueous media, affording high cis‐transoidal PPAs with up to 99% cis ‐contents, moderate molecular weights, broad weight...

Abstract Three polysiloxane bola surfactants containing carbohydrate (ATPS-LA) were synthesized using a two-step method. Structure characterization was performed by infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance ( 1 H NMR). Their surface activities aggregation properties in aqueous solution investigated tension measurements transmission electron microscopy (TEM). The results indicated that these three have much higher activity than those of conventional hydrocarbon...

Thermoresponsive difunctionalized γ-amide polycaprolactone amphiphilic diblock copolymers readily self-assembled to form spherical micelles in phosphate buffered saline.

藻蓝素（PC）是水体蓝藻的指示性色素，其浓度反映了蓝藻生物量，利用卫星遥感监测藻蓝素浓度年内动态对蓝藻水华的有效防控有着重要意义.根据不同季节的巢湖藻蓝素浓度实测数据与同期Sentinel-3 OLCI影像，构建机器学习回归反演模型，应用于巢湖2019年OLCI影像集上，对巢湖藻蓝素浓度的空间分布、年内变化进行遥感监测.研究表明：在MUMM和C2RCC水体大气校正方法中，C2RCC的大气校正结果更接近实测光谱反射率；在机器学习回归算法中，基于梯度提升回归的藻蓝素浓度反演模型精度最高，其R²、RMSE和rRMSE分别达到0.84、49.76 μg/L和34.1%.水体藻蓝素浓度在1—4月及12月较低，在5—11月浓度较高且波动频繁，日均气温是水体藻蓝素浓度年内变化的主要原因，而藻蓝素短期剧烈波动主要是受到日降水量和日照时数的影响；在夏、秋季节，西湖区藻蓝素浓度明显高于中、东湖区，主要与入湖河流中氮磷等物质的高输入有关.Sentinel-3...