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Lim S, Cho Y, Kang JH, Hwang M, Park Y, Kwak SK, Jung SH, Jung JH. Metallosupramolecular Multiblock Copolymers of Lanthanide Complexes by Seeded Living Polymerization. J Am Chem Soc 2024; 146:18484-18497. [PMID: 38888168 DOI: 10.1021/jacs.4c03983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Supramolecular block copolymers, derived via seeded living polymerization, are increasingly recognized for their rich structural and functional diversity, marking them as cutting-edge materials. The use of metal complexes in supramolecular block copolymerization not only offers a broad range of block copolymers through the structural similarity in the coordination geometry of the central metal ion but also controls spectroscopic properties, such as emission wavelength, emission strength, and fluorescence lifetime. However, the exploration of metallosupramolecular multiblock copolymerization based on metal complexes remains quite limited. In this work, we present a pioneering synthesis of metallosupramolecular multiblock copolymers utilizing Eu3+ and Tb3+ complexes as building blocks. This is achieved through the strategic manipulation of nonequilibrium self-assemblies via a living supramolecular polymerization approach. Our comprehensive exploration of both thermodynamically and kinetically regulated metallosupramolecular polymerizations, centered around Eu3+ and Tb3+ complexes with bisterpyridine-modified ligands containing R-alanine units and a long alkyl group, has highlighted intriguing behaviors. The monomeric [R-L1Eu(NO3)3] complex generates a spherical structure as the kinetic product. In contrast, the monomeric [R-L1Eu2(NO3)6] complex generates fiber aggregates as a thermodynamic product through intermolecular interactions such as π-π stacking, hydrophobic interaction, and H-bonds. Utilizing the Eu3+ complex, we successfully conducted seed-induced living polymerization of the monomeric building unit under kinetically regulated conditions. This yielded a metallosupramolecular polymer of precisely controlled length with minimal polydispersity. Moreover, by copolymerizing the kinetically confined Tb3+ complex state ("A" species) with a seed derived from the Eu3+ complex ("B" species), we were able to fabricate metallosupramolecular tri- and pentablock copolymers with A-B-A, and B-A-B-A-B types, respectively, through a seed-end chain-growth mechanism.
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Affiliation(s)
- Seola Lim
- Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Yumi Cho
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Ju Hwan Kang
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Minkyeong Hwang
- Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Yumi Park
- Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Sang Kyu Kwak
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sung Ho Jung
- Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
- Research Institute of Advanced Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jong Hwa Jung
- Department of Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
- Research Institute of Advanced Chemistry, Gyeongsang National University, Jinju 52828, Republic of Korea
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Jiang J, Nikbin E, Liu Y, Lei S, Ye G, Howe JY, Manners I, Winnik MA. Defect-Induced Secondary Crystals Drive Two-Dimensional to Three-Dimensional Morphological Evolution in the Co-Self-Assembly of Polyferrocenylsilane Block Copolymer and Homopolymer. J Am Chem Soc 2023; 145:28096-28110. [PMID: 38088827 DOI: 10.1021/jacs.3c09791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Bottom-up fabrication protocols for uniform 3D hierarchical structures in solution are rare. We report two different approaches to fabricate uniform 3D spherulites and their precursors using mixtures of poly(ferrocenyldimethylsilane) (PFS) block copolymer (BCP) and PFS homopolymer (HP). Both protocols are designed to promote defects in 2D assemblies that serve as intermediate structures. In a multistep seeded growth protocol, we add the BCP/HP mixture to (1D) rod-like PFS micelles in a selective solvent as first-generation seeds. This leads to 2D platelet structures. If this step is conducted at a high supersaturation, secondary crystals form on the basal surface of these platelets. Co-crystallization and rapid crystallization of BCP/HP promote the formation of defects that act as nucleation sites for secondary crystals, resulting in multilayer platelets. This is the key step. The multilayer platelets serve as second-generation seeds upon subsequent addition of BCP/HP blends and, with increasing supersaturation, lead to the sequential formation of uniform (3D) hedrites, sheaves, and spherulites. Similar structures can also be obtained by a simple one-pot direct self-assembly (heating-cooling-aging) protocol of PFS BCP/HP blends. In this case, for a carefully chosen but narrow temperature range, PFS HPs nucleate formation of uniform structures, and the annealing temperature regulates the supersaturation level. In both protocols, the competitive crystallization kinetics of HP/BCP affects the morphology. Both protocols exhibit broad generality. We believe the morphological transformation from 2D to 3D structures, regulated by defect formation, co-crystallization, and supersaturation levels, could apply to various semicrystalline polymers. Moreover, the 3D structures are sufficiently robust to serve as recoverable carriers for nanoparticle catalysts, exhibiting valuable catalytic activity and opening new possibilities for applications requiring exquisite 3D structures.
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Affiliation(s)
- Jingjie Jiang
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Ehsan Nikbin
- Department of Material Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
| | - Yang Liu
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Shixing Lei
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Gang Ye
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Jane Y Howe
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
- Department of Material Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E2, Canada
| | - Ian Manners
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Mitchell A Winnik
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
- Department of Material Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4, Canada
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Yao L, Fu K, Liu G. Solvent-Directed Hierarchical Self-Assembly of Tetraphenylpyrazine-Cholesterol with Amplified Circularly Polarized Luminescence. ACS APPLIED MATERIALS & INTERFACES 2023; 15:40817-40827. [PMID: 37583278 DOI: 10.1021/acsami.3c10358] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
It is important to identify the effect of assembly and aggregation on the chirality transfer and energy transmission in supramolecular polymer system, since the unordered aggregation is insufficient to promote luminescence enhancement and chirality transfer, even causing the negative effect. Another key issue is to identify the solvent effect on hierarchically chiral self-assembly. Herein, we designed an AIE-core based building block, tetraphenylpyrazine-cholesterol (TPP-Chol), to explore how the solvent component influences chirality transfer and energy transmission of its aggregates and/or assemblies. Interestingly, the hierarchical assembly behavior was realized in the mixture of MeOH/CHCl3 highly dependent on the MeOH content. During the solvent-directed hierarchical assembly, the morphologic transformations, such as nanoribbons with a width of 150 nm, twisted nanoribbons with helical pitch of 420 nm, nanoribbon clusters, and microflowers with an average diameter of 5.5 μm, were realized with obvious chirality amplification for both circular dichroism (CD) and circularly polarized luminescence (CPL) measurements. The hierarchical assembly of TPP-Chol was also demonstrated by a time-dependent CD test. The work points out the complexity and dynamic of hierarchically chiral self-assembly regulated by the solvent effect, which would be helpful for the development of supramolecular materials with enhanced CPL performance and dynamic chirality.
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Affiliation(s)
- Longfei Yao
- School of Chemical Science and Engineering, Advanced Research Institute, Tongji University, Shanghai 200092, People's Republic of China
| | - Kuo Fu
- School of Chemical Science and Engineering, Advanced Research Institute, Tongji University, Shanghai 200092, People's Republic of China
| | - Guofeng Liu
- School of Chemical Science and Engineering, Advanced Research Institute, Tongji University, Shanghai 200092, People's Republic of China
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Eivgi O, Ravenscroft AC, Blum SA. Imaging Block-Selective Copolymer Solvation. J Am Chem Soc 2023; 145:2058-2063. [PMID: 36689735 DOI: 10.1021/jacs.2c12576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Understanding individual-block solvation in self-assembled block copolymer systems is experimentally difficult, but this solvation underpins the assembly and disassembly observed at the bulk scale. Here, covalently attached viscosity-sensitive molecular rotors for fluorescence lifetime imaging microscopy uncover and quantitatively elucidate previously undisclosed differential block-selective responses toward solvation changes upon addition of DMSO and THF to self-assembled ROMP-based amphiphilic block copolymers. The sensitivity of this method provides unique information on block-selective solvent-triggered assembly and disassembly mechanisms, revealing behaviors invisible to or with superior sensitivity to traditional 1H NMR spectroscopy. These experiments demonstrate an analytical method and provide a granular mechanistic understanding, both suitable for fine tuning block copolymer assembly and disassembly processes.
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Affiliation(s)
- Or Eivgi
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Alexis C Ravenscroft
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Suzanne A Blum
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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Du C, Li Z, Zhu X, Ouyang G, Liu M. Hierarchically self-assembled homochiral helical microtoroids. NATURE NANOTECHNOLOGY 2022; 17:1294-1302. [PMID: 36329269 PMCID: PMC9747612 DOI: 10.1038/s41565-022-01234-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 09/07/2022] [Indexed: 05/22/2023]
Abstract
Fabricating microscale helical structures from small molecules remains challenging due to the disfavoured torsion energy of twisted architectures and elusory chirality control at different hierarchical levels of assemblies. Here we report a combined solution-interface-directed assembly strategy for the formation of hierarchically self-assembled helical microtoroids with micrometre-scale lengths. A drop-evaporation assembly protocol on a solid substrate from pre-assembled intermediate colloids of enantiomeric binaphthalene bisurea compounds leads to microtoroids with preferred helicity, which depends on the molecular chirality of the starting enantiomers. Collective variable-temperature spectroscopic analyses, electron microscopy characterizations and theoretical simulations reveal a mechanism that simultaneously induces aggregation and cyclization to impart a favourable handedness to the final microtoroidal structures. We then use monodispersed luminescent helical toroids as chiral light-harvesting antenna and show excellent Förster resonance energy transfer ability to a co-hosted chiral acceptor dye, leading to unique circularly polarized luminescence. Our results shed light on the potential of the combined solution-interface-directed self-assembly approach in directing hierarchical chirality control and may advance the prospect of chiral superstructures at a higher length scale.
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Affiliation(s)
- Cong Du
- Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Zujian Li
- Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Xuefeng Zhu
- Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Guanghui Ouyang
- Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
| | - Minghua Liu
- Beijing National Laboratory of Molecular Sciences and CAS Key Laboratory of Colloid, Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.
- University of Chinese Academy of Sciences, Beijing, China.
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Nourany M, Rahimi‐Darestani Y, Nayebi M, Kiany P. The Impact of Soft Segment Crystallization and Cross‐Link Density on the Shape Memory Performance of the PCL‐PTMG/Graphene‐ Based Polyurethane Nanocomposites. ChemistrySelect 2022. [DOI: 10.1002/slct.202202649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mohammad Nourany
- Amirkabir University of Technology Polymer Engineering and Color Technology Tehran Iran
| | | | - Milad Nayebi
- Amirkabir University of Technology Chemical Engineering Department Tehran Iran
| | - Parvin Kiany
- Amirkabir University of Technology Polymer Engineering and Color Technology Tehran Iran
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