Stimuli‐Mediated Structural Interchange Between Pd6 and Pd12 Architectures: Selective Recognition of E‐Stilbene by the Pd6 Architecture and its Photoprotection DOI

M.L. Aggarwal,

Ranit Banerjee, Neal Hickey

и другие.

Angewandte Chemie, Год журнала: 2024, Номер 136(50)

Опубликована: Авг. 20, 2024

Abstract The dynamic behaviour of metal‐ligand bonding cultivates stimuli‐mediated structural transformations in self‐assembled molecular architectures. propensity synthetically designed systems to interchange between higher‐order architectures is increased multi‐fold when the building blocks have higher conformational degrees freedom. Herein, we report a new ligand, (2,7‐bis(di(pyridin‐4‐yl)amino)‐9 H ‐fluoren‐9‐one) ( L ), which, upon self‐assembly with cis ‐[(ethylene‐1,2‐diamine)Pd(NO 3 ) 2 ] acceptor M resulted formation 6 trifacial barrel C1 water. Interestingly, during crystallization, rare 12 triangular orthobicupola architecture C2 was generated along . could also be solution via application several stimuli. aqueous media stabilize one trans ‐stilbene tS or cS molecule its cavity, selectivity for former from their mixture. Moreover, acted as an effective host prevent otherwise facile photoisomerization inside hydrophobic cavity under UV irradiation. Conversely, visible‐light‐induced reverse isomerization encapsulated achieved readily due better stabilization within and transparency visible light. A multi‐functional system therefore designed, which at same time stimuli‐responsive, shows isomer selectivity, photo‐protects ‐stilbene.

Язык: Английский

Stimuli‐Mediated Structural Interchange Between Pd6 and Pd12 Architectures: Selective Recognition of E‐Stilbene by the Pd6 Architecture and its Photoprotection DOI

M.L. Aggarwal,

Ranit Banerjee, Neal Hickey

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(50)

Опубликована: Авг. 20, 2024

Abstract The dynamic behaviour of metal‐ligand bonding cultivates stimuli‐mediated structural transformations in self‐assembled molecular architectures. propensity synthetically designed systems to interchange between higher‐order architectures is increased multi‐fold when the building blocks have higher conformational degrees freedom. Herein, we report a new ligand, (2,7‐bis(di(pyridin‐4‐yl)amino)‐9 H ‐fluoren‐9‐one) ( L ), which, upon self‐assembly with cis ‐[(ethylene‐1,2‐diamine)Pd(NO 3 ) 2 ] acceptor M resulted formation 6 trifacial barrel C1 water. Interestingly, during crystallization, rare 12 triangular orthobicupola architecture C2 was generated along . could also be solution via application several stimuli. aqueous media stabilize one trans ‐stilbene tS or cS molecule its cavity, selectivity for former from their mixture. Moreover, acted as an effective host prevent otherwise facile photoisomerization inside hydrophobic cavity under UV irradiation. Conversely, visible‐light‐induced reverse isomerization encapsulated achieved readily due better stabilization within and transparency visible light. A multi‐functional system therefore designed, which at same time stimuli‐responsive, shows isomer selectivity, photo‐protects ‐stilbene.

Язык: Английский

Процитировано

3
Preparation and Characterization of Low-Molecular-Weight Polyacrylonitrile DOI Open Access

Yuanteng Yang,

Xiaoli Jiang, Jing Jiang

и другие.

Polymers, Год журнала: 2025, Номер 17(8), С. 1112 - 1112

Опубликована: Апрель 19, 2025

Polyacrylonitrile (PAN) is renowned for its excellent physical and chemical properties, making it a promising candidate producing high-performance energetic materials. However, traditional high-molecular-weight PAN suffers from poor solubility low reactivity, which limits application as precursor advanced To overcome these issues, this study successfully synthesized low-molecular-weight (Mη: 6.808 kDa) using an environmentally friendly aqueous precipitation polymerization method, utilizing ammonium persulfate (6 wt% relative to the monomer mass) initiator isopropanol (400 wt%) chain transfer agent. The structures properties of were analyzed in depth. morphology structure characterized field-emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic resonance hydrogen (1H NMR). thermal assessed thermogravimetric analysis (TGA) differential calorimetry (DSC). Additionally, state changes during heating process with different molecular weights directly observed visual melting point analyzer first time. Furthermore, influence weight on PAN’s was investigated detail. Based that, linear regression between viscosity average (Mη) number (Mn) established, providing simple rapid access via measurements. Our employed CTA-controlled prepare PAN, possesses significant potential tetrazole-based

Язык: Английский

Процитировано

0
Formation of a Pd16 Molecular Basket Architecture of Reduced Symmetry and Angular Deviation in a Fluorenone Scaffold to Govern the Host–Guest Chemistry of Pd6 Trifacial Tubes DOI Creative Commons

M.L. Aggarwal,

Ranit Banerjee, Neal Hickey

и другие.

JACS Au, Год журнала: 2025, Номер 5(5), С. 2368 - 2378

Опубликована: Май 9, 2025

The employment of flexible ligands with significant conformational freedom in coordination-driven self-assembly enables the formation unique and intricate structures. In this study, such a fluorenone-appended ligand (L1) sterically demanding acceptor, [Pd-(tmed)-(ONO2)2] (M1), generated new molecular basket architecture, (M1) 16 8 (B), featuring large hollow cavity. B possesses an unusual twisted architecture low symmetry, consisting Pd-(II) centers arranged as four tetrahedra connected by eight ligands, representing structurally complex system reminiscent biological architectures. Designing entropically disfavored, architectures reduced symmetry is challenging but desirable, since they can act ideal models to study complicated natural systems. host-guest property supramolecular hosts governed confined cavities noncovalent interactions, which are dictated angular disposition coordination sites. To explore this, fluorenone scaffold was used synthesize two other tetradentate (L2 L3) that differed spatial distributions their vectors. these [Pd-(en)-(ONO2)2] (M2) resulted water-soluble 6 (L1/L2/L3) 3 trifacial tubes different geometries varying internal cavity dimensions. These variations further altered orientation carbonyl groups within cavities, thereby modulating guest binding abilities highlighting importance tailoring for specific binding.

Язык: Английский

Процитировано

0
A New Dendrimer/Copper (II) Complex Supported on Hercynite Magnetic Nanoparticles: An Efficient Catalyst for the Synthesis of Tetrazoles DOI

Shima Beiranvand,

Masoomeh Norouzi, Masoud Aman Mohammadi

и другие.

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 181306 - 181306

Опубликована: Июнь 1, 2025

Язык: Английский

Процитировано

0
Stimuli‐Mediated Structural Interchange Between Pd6 and Pd12 Architectures: Selective Recognition of E‐Stilbene by the Pd6 Architecture and its Photoprotection DOI

M.L. Aggarwal,

Ranit Banerjee, Neal Hickey

и другие.

Angewandte Chemie, Год журнала: 2024, Номер 136(50)

Опубликована: Авг. 20, 2024

Abstract The dynamic behaviour of metal‐ligand bonding cultivates stimuli‐mediated structural transformations in self‐assembled molecular architectures. propensity synthetically designed systems to interchange between higher‐order architectures is increased multi‐fold when the building blocks have higher conformational degrees freedom. Herein, we report a new ligand, (2,7‐bis(di(pyridin‐4‐yl)amino)‐9 H ‐fluoren‐9‐one) ( L ), which, upon self‐assembly with cis ‐[(ethylene‐1,2‐diamine)Pd(NO 3 ) 2 ] acceptor M resulted formation 6 trifacial barrel C1 water. Interestingly, during crystallization, rare 12 triangular orthobicupola architecture C2 was generated along . could also be solution via application several stimuli. aqueous media stabilize one trans ‐stilbene tS or cS molecule its cavity, selectivity for former from their mixture. Moreover, acted as an effective host prevent otherwise facile photoisomerization inside hydrophobic cavity under UV irradiation. Conversely, visible‐light‐induced reverse isomerization encapsulated achieved readily due better stabilization within and transparency visible light. A multi‐functional system therefore designed, which at same time stimuli‐responsive, shows isomer selectivity, photo‐protects ‐stilbene.

Язык: Английский

Процитировано

0