Conjugated polymers have emerged as promising candidates for photocatalytic H2 production owing to their structural designability and functional diversity. However, the fast recombination of photoexcited electrons holes limits rates. We now designed molecular heterostructures covalent triazine frameworks facilitate charge-carrier separation promote production. Benzothiadiazole thiophene moieties were selectively incorporated into electron-withdrawing electron-donating units, respectively, by...

Abstract Regulating both the chemo‐ and diastereoselectivity, divergently, of a reaction is highly attractive but extremely challenging. Presented herein catalyst‐controlled switch in diastereodivergent annulation reactions Morita–Baylis–Hillman carbonates, derived from isatins 2‐alkylidene‐1 H ‐indene‐1,3(2 )‐diones, exclusive α‐regioselectivity. α‐Isocupreine efficiently catalyzed [2+1] to access cyclopropane derivatives, [3+2] annulations were accomplished by employing either chiral...

Adsorbents widely utilized for environmental remediation, water purification, and gas storage have been usually reported to be either porous or crystalline materials. In this contribution, we report the synthesis of two covalent organic superphane cages, that are as nonporous amorphous superadsorbents aqueous iodine adsorption with record-breaking capability selectivity. static system, cages exhibit uptake capacity up 8.41 g g-1 in I2 solution 9.01 I3- (KI/I2) solution, respectively, even...

Efficient construction of a challenging aza-spirocycloheptane oxindole scaffold is reported through an unprecedented [4 + 3] cycloaddition reaction with bromo-substituted Morita–Baylis–Hillman adducts isatins and N-(ortho-chloromethyl)aryl amides. Both reactive intermediates, the allylic phosphonium ylides aza-o-quinone methides, were in situ generated, chemoselectively facilitated by Lewis base Brønsted base, respectively.

LiCl is a classic "hard" ion salt that present in lithium-rich brines and key component end-of-life materials (that is, used lithium-ion batteries). Its isolation purification from like salts recognized challenge with potential strategic economic implications. Herein, we describe two ditopic calix[4]pyrrole-based ion-pair receptors (2 3), are capable of selectively capturing LiCl. Under solid-liquid extraction conditions, using 2 as the extractant, could be separated NaCl/KCl mixture...

The hemispherand-strapped calix[4]pyrrole (1) acts as an ion pair receptor that exhibits selectivity for lithium salts. In organic media (CD2Cl2 and CD3OD, v/v, 9:1), 1 binds LiCl with high preference relative to NaCl, KCl, RbCl. DFT calculations provided support the observed selectivity. Single crystal structures of five different ion-pair complexes were obtained. case LiCl, a single bridging water molecule between cation chloride anion was observed, while tight contact pairs in LiBr, LiI,...

Anion-π interactions have been widely studied as new noncovalent driving forces in supramolecular chemistry. However, self-assembly induced by anion-π is still largely unexplored. Herein we report the formation of amphiphiles through interactions, and subsequent self-assembled vesicles water. With π receptor 1 host anionic amphiphiles, such sodium dodecylsulfate (SDS), laurate (SLA), methyl dodecylphosphonate (SDP), guests, sequential host-guest was demonstrated SEM, TEM, DLS, XRD...

We report here the fluorescent sensing of both aromatic and linear saturated dicarboxylate anions (DC2–) (as their tetrabutylammonium salts) with different lengths shapes in acetonitrile using a single probe, i.e., bis-calix[4]pyrrole-appended 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine (DPAC-bisC4P) incorporating vibration-induced emission (VIE) phenazine core. Fluorescence titration studies revealed that treating DPAC-bisC4P guests capable forming pseudomacrocyclic host–guest complexes...

Photocatalytic hydrogenation of biomass-derived organic molecules transforms solar energy into high-energy-density chemical bonds. Reported herein is the preparation a thiophene-containing covalent triazine polymer as photocatalyst, with unique donor-acceptor units, for metal-free photocatalytic unsaturated molecules. Under visible-light illumination, polymeric photocatalyst enables transformation maleic acid succinic production rate about 2 mmol g-1 h-1 , and furfural furfuryl alcohol 0.5 ....

Abstract Conjugated polymers have emerged as promising candidates for photocatalytic H 2 production owing to their structural designability and functional diversity. However, the fast recombination of photoexcited electrons holes limits rates. We now designed molecular heterostructures covalent triazine frameworks facilitate charge‐carrier separation promote production. Benzothiadiazole thiophene moieties were selectively incorporated into electron‐withdrawing electron‐donating units,...

Abstract Photocatalytic H 2 O production is a prospective alternative to the traditional anthraquinone oxidation method for production. Compared well‐established inorganic counterparts, organic photocatalysts show greater promise owing their structural diversity and functional tunability, but unfortunately suffer from limited activity at present. Here, comonomer doping strategy reported tune electronic structures of covalent triazine framework nanoshells by introducing strong...

ABSTRACT Two-dimensional covalent organic frameworks are promising for photocatalysis by virtue of their structural and functional diversity, but generally suffer from low activities relative to inorganic competitors. To fulfill full potential requires a rational tailoring structures at different scales as well surface properties. Herein, we demonstrate benzobisthiazole-based superior photocatalyst hydrogen production. The product features high crystallinity with ordered 2.5-nm-wide...

Abstract The development of colitis‐associated colorectal cancer is known to be associated with the inflammation‐dysplasia‐carcinoma pathway, and thus, chronic inflammation represents an inducer promoter cancer. To inhibit evolution from colitis provide efficient anticancer therapy, a surface‐engineered vanadium carbide MXene nanoenzyme (MXenzyme) developed both amino functionalization gallium doping (Ga/V 2 C‐NH ). Benefiting multiple enzyme‐mimicking activities, MXenzymes have shown great...

The escalating demand for gold, coupled with dwindling terrestrial reserves, underscores the urgent need innovative separation strategies, including e-waste recycling and seawater extraction. However, development of ultra-efficient, highly selective adsorbents capable recovering trace amounts gold from complex aquatic matrices remains a formidable challenge. Herein, covalent organic superphane cage is reported as nonporous amorphous superadsorbent (NAS) efficient recovery via intermolecular...

A fully conjugated three-dimensional (3D) expanded carbaporphyrin (2) was prepared in a one-pot procedure that involves [2+4] condensation reaction between dibenzo[g,p]chrysene-bearing tetrapyrrole precursor (1) and pentafluorobenzaldehyde, followed by oxidation. Single crystal X-ray diffraction analysis revealed 2 possesses cage-like structure consisting of four dipyrromethenes two bridging dibenzo[g,p]chrysene units. As prepared, is nonaromatic as inferred from UV–vis-NIR 1H NMR...

Herein we describe a large capsule-like bis-calix[4]pyrrole 1, which is able to host concurrently two dihydrogen phosphate anions within relatively internal cavity. Evidence for the concurrent, dual recognition of encapsulated came from 1H NMR and UV–vis spectroscopies ITC titrations carried out in CD2Cl2/CD3OD (9/1, v/v) or dichloroethane (DCE), as well single crystal X-ray diffraction analyses. Receptor 1 was also found bind dianionic sulfate bridged by water molecules solid state. The...

Bis-dicarbacorrole (bis-H3) with two adj-CCNN subunits was synthesized by incorporating a dibenzo[g,p]chrysene moiety into the macrocyclic structure. The trianionic cores in bis-H3 can stabilize Cu(III) ions (bis-Cu) or concurrently cation and Pd(II) ion form of hetero bis-metal complex (mix-Cu/Pd). As prepared, mix-Cu/Pd displays organic π radical character, as confirmed various techniques, including electron paramagnetic resonance spectroscopy, cyclic voltammetry, femtosecond transient...