A novel three-component covalent organic polymer (COP) named SLEL-6 was prepared based on Schiff base chemistry through a multi-component method for ciprofloxacin removal from an aqueous solution. It could be embedded in sodium alginate (SA) to obtain spherical COP/SA composite beads (SLEL-6/SA beads) with enhanced adsorption ability and boosted recyclability. Details are found in the article from Yangxue Li and colleagues. DOI: 10.1002/pol.20230258
As an ideal candidate in mesenchymal stem cells (MSCs) transplantation , salvianolic acid B can not only protect MSCs against ?OH‐induced damages, but also promote their proliferation. This extraordinary effect may be attributed to catechol moieties with antioxidant & Fe‐chelating capacities, and to ester, carboxylic, or benzofuran moieties with proliferation‐promoting potential. More details about this figure will be discussed by Dr. Xican Li and his group on pages 924–929 in this issue.
By adjusting the concentration of the solution of hyperbranched poly(o-hydroxyamide)s and spin-coating the solution on a silicon wafer, the ultrathin films could be obtained. After heating, the obtained ultrathin films could be converted to the corresponding polybenzoxazole ultrathin films, which have high thermal stability, good durability, and toughness. They are expected to find applications in various fields in the near future. The cover design was created by the first author, Mr. Hiroyuki Maekawa. DOI: 10.1002/pol.20230659
The cover picture shows a new protocol for the NiCl2 ‐catalyzed cross‐electrophile coupling of aryl bromides with pyrimidin‐2‐yl tosylates to give the corresponding C2 ‐arylation pyrimidine derivatives. This study provides an improvement over previous methods by using pyrimidin‐2‐yl tosylates instead of halides as coupling partners that are stable and easily available. More details are discussed in the article by Wang et al. on page 1366–1370.
In this invited paper, square‐planar Pt(II) azolate complexes: their luminescent properties can be easily fine‐tuned by varying chelating chromophores and the associated Pt…Pt stacking in the solid state. Depicted in the cover picture are four Pt(II) complexes with sky‐blue, green, yellow and red‐orange electroluminescence. More details will be discussed by Dr. Yun Chi and his group on page 574–588 in this issue.
Electrophoresis 2014, 35, 2673–2680. DOI: 10.1002/elps.201400210 pH‐responsive microcapsules manufactured by combining electrostatic droplets (ESD) and microfluidic droplets (MFD) techniques to produce mono‐disperse core (alginate) ‐ shell (chitosan) structure with controlled drug release behavior. The fabricated core‐shell microcapsules have a pH‐controlled drug delivery function according to acidic and alkaline environment, and present positive biocompatibility, indicating their potential use in biological and biomedical applications, such as pH‐responsive drug‐delivery systems, scaffolding for bone tissues, and as an oral drug‐delivery vehicle.
The inside cover picture shows a temperature controllable porphyrin aluminum catalyst using 5,10,15,20‐tetra(1,2,3,4,5,6,7,8‐octahydro‐1,4:5,8‐dimethanoanthracen‐9‐yl)porphyrin as ligand, which showed significantly temperature‐responsive selectivity in the coupling reaction of CO2 and PO. Only cycloaddition reaction happened at temperature above 75 °C to produce 100% CPC, whereas copolymerization became dominant to afford PPC with selectivity over 91% at temperature below 50 °C. More details are discussed in the article by Wang et al. on page 299–305.
The cover image by Jun Fu and co-workers displays how thermochromic smart windows dynamically regulate building thermal exchange in different climates. Typical thermochromic materials, including vanadium dioxide, hydrogels, perovskites, ionic liquids, and liquid crystals, transform from transparent to opaque when the temperature changes. Smart windows block outdoor solar thermal in the summer, which prevents indoor temperature rising. Indoor thermal radiation is also inhibited in winter to warm the indoors. Building temperatures and energy efficiency are optimized by thermochromic smart windows. DOI: 10.1002/pol.20230408
This invited paper reports a series of isotruxenepolyaniline (PANI) hybrid systems prepared by chemical oxidation of aniline in the presence of isotruxene additives ITP and / or ITA at specific aniline‐to‐additive molar ratios. These hybrid systems are superior to the parent PANI in the performance of electrochemical capacitance. More details will be discussed by Dr. Jye‐Shane Yang and his co‐workers on page 1007–1022 in this issue.
In this paper, a simple in situ preparation of aluminum iodide (AlI3) from cheap, abundant aluminum metal (Al(s)) and elemental iodine (I2) served as an efficient catalyst for the dehydrative thioglycosylation of 1‐hydroxyl sugars with various alkyl and aryl mercaptans. Due to the anchimeric assistant mechanism, the anomerically pure β‐thioglycosides were obtained in high yields with exclusive diastereoselectivity. More details will be discussed by Dr. Shiue‐Shien on page 464–473 in this issue.
The back cover picture shows an efficient dual enantioselective synthesis of 1‐substituted 1,2,3,4‐tetrahydroisoquinoline, which was realized through iridium‐catalyzed hydrogenation of 1‐substituted 3,4‐dihydroisoquinolines. Only tuning the amount of N‐bromosuccinimide, this reaction promoted by (R)‐BINAP is able to furnish both enantiomers of products up to 89% ee (S) and 98% ee (R), respectively. Dual activation role of N‐bromosuccinimide is proposed to be responsible for the reversal of enantioselectivity under two hydrogenation conditions. More details are discussed in the article by Zhou et al. on page 139–142.
The inside cover picture shows secondary and tertiary amines, which are important intermediates in organic synthesis for the preparation of natural products, pharmaceutical and agronomical compounds. The direct reductive amination of aldehydes and ketones represents a powerful tool for the preparation of secondary and tertiary amines. Here, direct and general reductive amination of aldehydes and ketones with amines and nitroaromatics was presented under H2 using recyclable iridium catalysts, and lots of secondary and tertiary amines were produced in high yields. Moreover, the heterogeneous iridium catalysts Ir@NC(600‐2h) can be reused several times without evident deactivation. More details are discussed in the article by Huang et al. on page 1371–1377.
This special issue commemorates the 70th volume of the Journal of the Chinese Chemical Society (JCCS), the flagship journal of The Chemical Society located in Taipei launched in 1933 in mainland China and later resumed in 1954 in Taiwan. In this special issue, we have invited chemists from a broad range of disciplines and expertise to showcase the diversity and activity of chemical research. We hope that readers will thoroughly enjoy the content.
The inside back cover picture shows the construction of neutral supramolecular polymeric films containing well‐defined metallacycles as the main scaffolds through combination of coordination‐driven self‐assembly with post‐electropolymerization. A new 120° triphenylamine substituted dicarboxylate donor ligand and the complementary 120° triphenylamine functionalized di‐Pt(II) acceptor were employed to build neutral multi‐triphenylamine functionalized 2‐D metallacycles with the well‐defined shape and size via the formation of oxygen‐to‐platinum coordination bonds. Subsequent post‐electropolymerization of the obtained neutral multi‐triphenylamine containing metallacycles allowed for fabrication of a new type of neutral polymeric film with well‐controlled cavity sizes and thickness, which may have potential applications in neutral molecule detection, separation, and capture. More details are discussed in the article by Yang et al. on page 134–138.
Diselenide‐containing polymers are facilely synthesized from polymers prepared by atom transfer radical polymerization (ATRP). Benefiting from the ATRP technology, this protocol provides a flexible route for controlling the polymer structure, which allows for a great variety of architectures of selenium‐containing polymer materials for applications in various fields. The oxidative and reductive responsive behavior of the obtained diselenide‐containing polymers is also investigated.
Aggregation‐caused quenching (ACQ) is a general phenomenon that is faced by traditional fluorescent polymers. Aggregation‐induced emission (AIE) is exactly opposite to ACQ. AIE molecules are almost nonemissive in their molecularly dissolved state, but they can be induced to show high fluorescence in the aggregated or solid state. Incorporation of AIE phenomenon into polymer design has yielded various polymers with AIE characteristics. In this review, the recent progress of AIE polymers for biological applications is summarized.
In this paper , a series of novel N‐(substituted phenyl/benzyl)‐2‐methylthio‐4‐((pyridin‐3‐ylmethyl)amino)pyrimidine‐5‐carboxamides were synthesized by multistep reactions. Their in vitro antifungal activity against two kinds of plant pathogenic funguese was evaluated, and the result showed that most target compounds possessed excellent activities against rape S. sclerotiorum. More details will be discussed by Dr. Lin Jiang and his co‐workers on page 445–451 in this issue.
The cover picture shows a protocol of a palladium‐catalyzed arylation of vinylarenes with diaryliodonium salts with the assistance of visible light. A palladium‐vinylarene complex may be excited via the visible light irradiation, where the kinetic isotope effect (kH/kD) was around 1.1. However under darkness, the reaction proceeded very slowly, and the kinetic isotope was found as 3.6, indicating the C—H bond cleavage step is the rate‐determining step. This protocol avoided high reaction temperature and enabled us to access a series of ortho tetra‐substituted vinylarene atropisomers with high enantiospecificity. More details are discussed in the article by Gu et al. on page 11–14.
Inside Back Cover picture shows The carps trying hard to make a successful jump over the Dragon Gate will change into fish‐dragons, which is a legend handed down in China over generations. The back cover picture shows photochemical and electrochemical CO2 transformations with organic compounds through the utilization of solar energy or electric energy, producing a series of valuable products, including carboxylic acids and hetero‐cyclic compounds. The combined utilization of both clean energy and CO2 has attracted increasing attention in sustainable development of renewable energy and green chemistry. Recent advances are summarized by He et al. on page 644–659.
The cover picture shows an electricity powered dehydrogenative [3+2] annulation reaction of (hetero)arylamines with tethered di‐, tri, and tetra‐substituted alkenes for the preparation of indoline and azaindoline products. The electrochemical reactions proceed through H2 evolution and thus avoid the use of stoichiometric chemical oxidants. This method, which is applicable to the preparation of highly functionalized (aza)indoline scaffold, enables the total synthesis of (±)‐hinckdentine A in 12 steps. More details are discussed in the article by Xu et al. on page 909–915.
