11 results on '"Zhu, Zhong‐Hong"'
Search Results
2. Enhancement of Luminescence, Multiple-Sensing, and Differentiated Live-Cell-Imaging Properties of High-Nuclear Lanthanide Nanoclusters via the Zn(II)-Chelate-Controlled Dual Antenna Effect.
- Author
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Yu, Bing, Zhu, Zhong-Hong, Qin, Wen-Wen, Wang, Hai-Ling, Li, Yun-Lan, Liang, Fu-Pei, and Zou, Hua-Hong
- Published
- 2024
- Full Text
- View/download PDF
3. Different anion (NO3− and OAc−)-controlled construction of dysprosium clusters with different shapes
- Author
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Xie, Jia-Nan, primary, Li, Yun-Lan, additional, Wang, Hai-Ling, additional, Xiao, Zi-Xin, additional, Zhu, Zhong-Hong, additional, Liang, Fu-Pei, additional, and Zou, Hua-Hong, additional
- Published
- 2024
- Full Text
- View/download PDF
4. Aggregation induced emission dynamic chiral europium(III) complexes with excellent circularly polarized luminescence and smart sensors.
- Author
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Li, Yun-Lan, Wang, Hai-Ling, Zhu, Zhong-Hong, Wang, Yu-Feng, Liang, Fu-Pei, and Zou, Hua-Hong
- Subjects
INTELLIGENT sensors ,ROTOR vibration ,EUROPIUM ,DETECTION limit ,LUMINESCENCE - Abstract
The synthesis of dynamic chiral lanthanide complex emitters has always been difficult. Herein, we report three pairs of dynamic chiral Eu
III complex emitters (R/S-Eu-R-1, R = Et/Me; R/S-Eu-Et-2) with aggregation-induced emission. In the molecular state, these EuIII complexes have almost no obvious emission, while in the aggregate state, they greatly enhance the EuIII emission through restriction of intramolecular rotation and restriction of intramolecular vibration. The asymmetry factor and the circularly polarized luminescence brightness are as high as 0.64 (5 D0 →7 F1 ) and 2429 M−1 cm−1 of R-Eu-Et-1, achieving a rare double improvement. R-Eu-Et-1/2 exhibit excellent sensing properties for low concentrations of CuII ions, and their detection limits are as low as 2.55 and 4.44 nM, respectively. Dynamic EuIII complexes are constructed by using chiral ligands with rotor structures or vibration units, an approach that opens a door for the construction of dynamic chiral luminescent materials. Chiral luminescent materials are of increasing interest in various applications, but achieving a desirable balance of properties can be challenging. Here, the authors report the development of Eu-based complexes with chiral luminescence and aggregation induced emission. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
5. Different anion (NO3− and OAc−)-controlled construction of dysprosium clusters with different shapes.
- Author
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Xie, Jia-Nan, Li, Yun-Lan, Wang, Hai-Ling, Xiao, Zi-Xin, Zhu, Zhong-Hong, Liang, Fu-Pei, and Zou, Hua-Hong
- Subjects
DYSPROSIUM ,RARE earth metals ,ANIONS ,JOINTS (Engineering) - Abstract
The complex hydrolysis process and strong uncertainty of self-assembly rules have led to the precise synthesis of lanthanide clusters still being in the "blind-box" stage and simplifying the self-assembly process and developing reliable regulation strategies have attracted widespread attention. Herein, different anions are used to induce the construction of a series of dysprosium clusters with different shapes and connections. When the selected anion is NO
3 − , it blocks the coordination of metal sites around the cluster through the terminal group coordination mode, thereby controlling the growth of the cluster. When NO3 − was changed to OAc− , OAc− adopted a bridging mode to induce modular units to build dysprosium clusters through an annular growth mechanism. Specifically, we selected 2-amino-6-methoxybenzoic acid, 2-hydroxybenzaldehyde, and Dy(NO3 )3 ·6H2 O to react under solvothermal conditions to obtain a pentanuclear dysprosium cluster (1). The five Dy(III) ions in 1 are distributed in upper and lower planes and are formed by the tight connection of nitrogen and oxygen atoms, and μ3 -OH− bridges on the ligand. Next, octa-nuclear dysprosium cluster (2) were obtained by only regulating ligand substituents. The eight Dy(III) ions in 2 are tightly connected through ligand oxygen atoms, μ2 -OH− , and μ3 -OH− bridges, forming an elliptical {Dy/O} cluster core. Furthermore, only by changing NO3 − to OAc− , a wheel-shaped tetradeca-nuclear dysprosium cluster (3) was obtained. Cluster 3 is composed of OAc− bridged multiple template Dy3 L3 units and pulling of these template units connected by an annular growth mechanism forms a wheel-shaped cluster. The angle of the coordination site on NO3 − is ∠ONO = 115°, which leads to the further extension of the metal sites on the periphery of clusters 1 and 2 through the terminal group coordination mode, thereby regulating the structural connection of the clusters. However, the angle of the coordination site on OAc− is ∠OCO = 128°, and a slightly increased angle leads to the formation of a ring-shaped cluster 3 by connecting the template units through bridging. This is a rare example of the controllable construction of lanthanide clusters with different shapes induced by the regulation of different anions, which provides a new method for the precise construction of lanthanide clusters with special shapes. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
6. Achieving beyond 100% Triplet State Generation with Singlet Fission Strategy for High-Performance Photosensitizer Design.
- Author
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Liu, Yubo, Li, Jianqing, Gong, Shaokuan, Yu, Yuewen, Zhu, Zhong-Hong, Ji, Chao, Zhao, Zujin, Chen, Xihan, Feng, Guangxue, and Tang, Ben Zhong
- Published
- 2024
- Full Text
- View/download PDF
7. Coordination recognition of differential template units of lanthanide chiral chain.
- Author
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Qin, Wen-Wen, Long, Bing-Fan, Zhu, Zhong-Hong, Wang, Hai-Ling, Liang, Fu-Pei, and Zou, Hua-Hong
- Subjects
MOLECULAR recognition ,CIRCULAR dichroism ,RAW materials ,MACROMOLECULES ,ENANTIOMERS - Abstract
Coordination-driven self-assembly processes often produce remarkable structures. In particular, self-assembly processes mediated by chiral template units have provided research ideas for analyzing the formation of chiral macromolecules in living organisms. In this study, by regulating the proportion of reaction raw materials in the "one-pot" synthesis of lanthanide complexes, we constructed chiral template units with different coordination orientations. As a result, lanthanide chiral chains connected to different structures were obtained through the self-assembly process of coordination recognition. In particular, driven by coordination, chiral template units with codirectional coordination points (called cis configuration) coordinate solely with cis template units during the self-assembly process to obtain a one-dimensional (1D) chain R-1 / S-1 with an "S"-shaped distribution. Moreover, chiral template units with reversed coordination sites (called trans configuration) and twisted chiral template units are connected solely to templates with the same configuration to form a 1D chain R-2 / S-2 with an axial helix. A circular dichroism spectrum shows that R-1 / S-1 and R-2 / S-2 are two pairs of enantiomers. The controllable construction of these two differential 1D chains is of great significance for studying coordination recognition at the molecular level. To the best of our knowledge, this is the first study to construct a 1D lanthanide chain through the self-assembly process of coordination recognition. The assembly process of nucleotides to form a hierarchical structure is simulated. This work provides a vivid example of the controllable synthesis of lanthanide complexes with precise structures and offers a new perspective on the formation process of chiral macromolecules that simulates natural processes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. Step-by-Step and Competitive Assembly of Two Dy(III) Single-Molecule Magnets with Their Performance Tuned by Schiff Base Ligands
- Author
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Wang, Hai-Ling, Peng, Jin-Mei, Zhu, Zhong-Hong, Mo, Kai-Qiang, Ma, Xiong-Feng, Li, Bo, Zou, Hua-Hong, and Liang, Fu-Pei
- Abstract
The assembly process of lanthanide clusters often involves various complex assembly methods. Hence, studying the stepwise assembly mechanism is extremely difficult. In the assembly process of lanthanide clusters, if the in situ reaction or competitive reaction is involved, the reaction intermediates undergo rapid and complex changes, which makes research on the assembly mechanism even more difficult. Herein, 1-methyl-1H-benzo[d]imidazole-2-carbaldehyde (La) and 1-aminonaphthalen-2-ol (Lb) undergo a stepwise assembly reaction with Dy(III) salts under the promotion of a in situ Schiff base reaction to achieve Dy2synthesis. The stepwise assembly mechanism is La+ Lb→ HL1→ Dy1 → Dy2. In the above Dy2formation reaction, Lais changed to 2-hydroxy-3-methoxybenzaldehyde (Lc), and then pyridin-2-ylmethanamine (Ld) is added. We have found that two different Schiff base ligands are formed in situ, and both are coordinated with Dy(III) ions to form a mixed ligand cluster Dy4by competitive and stepwise assembly. The assembly mechanism is Lb+ Lc/Lc+ Ld→ L2/L3→ Dy1′ → Dy2′ → Dy3′ → Dy4′. We have tracked the competitive assembly process driven by the in situ Schiff base reaction in the lanthanide clusters and proposed its competitive assembly mechanism. Magnetic relaxation studies reveal single-molecule magnet behavior under zero external direct-current field with Ueff= 19.6 K and τo= 1.7 × 10–5s for Dy2and Ueff= 10.0 K and τo= 2.6 × 10–5s for Dy4.
- Published
- 2024
- Full Text
- View/download PDF
9. One-Pot In Situ Construction of a Highly Stable Acylhydrazone-Derived Dy 9 Cluster with Photodynamic Sterilization Property.
- Author
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Qin WW, Li YL, Zhu ZH, Wang HL, Cheng L, and Zou HH
- Abstract
The extremely low stability of lanthanide clusters with precise structures and nanometer dimensions in aqueous solutions limits their application in the field of photodynamic sterilization. In this study, an hourglass-shaped nine-nucleated Dy
9 cluster ( 1 ) with excellent light-driven reactive oxygen species (ROS) generation ability and photodynamic sterilization property was constructed using acylhydrazone multidentate chelating ligands obtained via an in situ reaction. The eight chelating ligands were distributed outside cluster 1 , tightly wrapping the cluster core, thus preventing solvent molecules from attacking the cluster nucleus and ensuring the stability of cluster 1 in solution, which was demonstrated via X-ray diffraction and high-resolution electrospray ionization mass spectrometry (HRESI-MS). Time-dependent HRESI-MS monitoring of the self-assembly process of cluster 1 allowed two possible self-assembly mechanisms. The heavy atom effect of multiple Dy(III) ions in the Dy9 cluster enhanced the ISC pathway through spin-orbit coupling, promoting energy transfer from the excited singlet state (S1 ) to the triplet state (T1 ), which was stabilized, inducing the generation of more ROS. Cluster 1 showed a remarkable sterilization effect due to the generation of abundant ROS under light irradiation conditions. To our knowledge, this is a rare instance of lanthanide clusters with photodynamic sterilization, providing new horizons for the construction of fast and efficient sterilizers.- Published
- 2024
- Full Text
- View/download PDF
10. Different anion (NO 3 - and OAc - )-controlled construction of dysprosium clusters with different shapes.
- Author
-
Xie JN, Li YL, Wang HL, Xiao ZX, Zhu ZH, Liang FP, and Zou HH
- Abstract
The complex hydrolysis process and strong uncertainty of self-assembly rules have led to the precise synthesis of lanthanide clusters still being in the "blind-box" stage and simplifying the self-assembly process and developing reliable regulation strategies have attracted widespread attention. Herein, different anions are used to induce the construction of a series of dysprosium clusters with different shapes and connections. When the selected anion is NO
3 - , it blocks the coordination of metal sites around the cluster through the terminal group coordination mode, thereby controlling the growth of the cluster. When NO3 - was changed to OAc- , OAc- adopted a bridging mode to induce modular units to build dysprosium clusters through an annular growth mechanism. Specifically, we selected 2-amino-6-methoxybenzoic acid, 2-hydroxybenzaldehyde, and Dy(NO3 )3 ·6H2 O to react under solvothermal conditions to obtain a pentanuclear dysprosium cluster (1). The five Dy(III) ions in 1 are distributed in upper and lower planes and are formed by the tight connection of nitrogen and oxygen atoms, and μ3 -OH- bridges on the ligand. Next, octa-nuclear dysprosium cluster (2) were obtained by only regulating ligand substituents. The eight Dy(III) ions in 2 are tightly connected through ligand oxygen atoms, μ2 -OH- , and μ3 -OH- bridges, forming an elliptical {Dy/O} cluster core. Furthermore, only by changing NO3 - to OAc- , a wheel-shaped tetradeca-nuclear dysprosium cluster (3) was obtained. Cluster 3 is composed of OAc- bridged multiple template Dy3 L3 units and pulling of these template units connected by an annular growth mechanism forms a wheel-shaped cluster. The angle of the coordination site on NO3 - is ∠ONO = 115°, which leads to the further extension of the metal sites on the periphery of clusters 1 and 2 through the terminal group coordination mode, thereby regulating the structural connection of the clusters. However, the angle of the coordination site on OAc- is ∠OCO = 128°, and a slightly increased angle leads to the formation of a ring-shaped cluster 3 by connecting the template units through bridging. This is a rare example of the controllable construction of lanthanide clusters with different shapes induced by the regulation of different anions, which provides a new method for the precise construction of lanthanide clusters with special shapes.- Published
- 2024
- Full Text
- View/download PDF
11. Coordination recognition of differential template units of lanthanide chiral chain.
- Author
-
Qin WW, Long BF, Zhu ZH, Wang HL, Liang FP, and Zou HH
- Abstract
Coordination-driven self-assembly processes often produce remarkable structures. In particular, self-assembly processes mediated by chiral template units have provided research ideas for analyzing the formation of chiral macromolecules in living organisms. In this study, by regulating the proportion of reaction raw materials in the "one-pot" synthesis of lanthanide complexes, we constructed chiral template units with different coordination orientations. As a result, lanthanide chiral chains connected to different structures were obtained through the self-assembly process of coordination recognition. In particular, driven by coordination, chiral template units with codirectional coordination points (called cis configuration) coordinate solely with cis template units during the self-assembly process to obtain a one-dimensional (1D) chain R-1/S-1 with an "S"-shaped distribution. Moreover, chiral template units with reversed coordination sites (called trans configuration) and twisted chiral template units are connected solely to templates with the same configuration to form a 1D chain R-2/S-2 with an axial helix. A circular dichroism spectrum shows that R-1/S-1 and R-2/S-2 are two pairs of enantiomers. The controllable construction of these two differential 1D chains is of great significance for studying coordination recognition at the molecular level. To the best of our knowledge, this is the first study to construct a 1D lanthanide chain through the self-assembly process of coordination recognition. The assembly process of nucleotides to form a hierarchical structure is simulated. This work provides a vivid example of the controllable synthesis of lanthanide complexes with precise structures and offers a new perspective on the formation process of chiral macromolecules that simulates natural processes.
- Published
- 2024
- Full Text
- View/download PDF
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