1
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New Carbamates and Ureas: Comparative Ability to Gel Organic Solvents. Gels 2022; 8:gels8070440. [PMID: 35877525 PMCID: PMC9316452 DOI: 10.3390/gels8070440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/23/2022] [Accepted: 07/05/2022] [Indexed: 02/01/2023] Open
Abstract
Two series of novel amphiphilic compounds were synthesized based on carbamates and ureas structures, using a modification of the synthesis methods reported by bibliography. The compounds were tested for organic solvent removal in a model wastewater. The lipophilic group of all compounds was a hexadecyl chain, while the hydrophilic substituent was changed with the same modifications in both series. The structures were confirmed by FT-IR, NMR, molecular dynamic simulation and HR-MS and their ability to gel organic solvents were compared. The SEM images showed the ureas had a greater ability to gel organic solvents than the carbamates and formed robust supramolecular networks, with surfaces of highly interwoven fibrillar spheres. The carbamates produced corrugated and smooth surfaces. The determination of the minimum gelation concentration demonstrated that a smaller quantity of the ureas (compared to the carbamates, measured as the weight percentage) was required to gel each solvent. This advantage of the ureas was attributed to their additional N-H bond, which is the only structural difference between the two types of compounds, and their structures were corroborated by molecular dynamic simulation. The formation of weak gels was demonstrated by rheological characterization, and they demonstrated to be good candidates for the removal organic solvents.
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2
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Xu L, Zhang M, Zhu X, Xue C, Wang HX, Liu M. Solvent-Modulated Chiral Self-Assembly: Selective Formation of Helical Nanotubes, Nanotwists, and Energy Transfer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1765-1773. [PMID: 34965725 DOI: 10.1021/acsami.1c20969] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As the medium for self-assembly processes, solvents strongly influence the supramolecular assemblies via specific solute-solvent interactions, which may result in effective modulation of properties, self-assembled nanostructures, and functions through varying the solvent. Here, two kinds of pyridine-cyanostilbene functionalized chiral amphiphiles (l/d-PyPhG and l-PyG) were designed, and their self-assembly behaviors in different solvents were investigated. It was found that both amphiphiles formed gels in dimethyl sulfoxide (DMSO) and self-assembled into right-handed nanotwists, while they formed suspensions in ethanol consisting of left-handed nanotubes. Although the molecular chirality in the compounds remained unchanged in the two solvents, the nanoassemblies showed opposite handedness at the nanoscale together with opposite circular dichroism (CD) and circularly polarized luminescence (CPL) signals. Furthermore, when the amphiphiles were co-assembled with an achiral dye, it was found that efficient energy transfer took place in the systems composed of nanotubes rather than those composed of nanotwists. Therefore, by assembling molecules with the same molecular chirality in different solvents, a selective formation of helical nanotubes or nanotwists and the regulation of handedness as well as energy transfer efficiency were achieved.
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Affiliation(s)
- Lifei Xu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Mingming Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 201210, P. R. China
| | - Xuefeng Zhu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Chenlu Xue
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Han-Xiao Wang
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Minghua Liu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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3
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Mandal R, Biradha K. Photochemical [2 + 2] polymerization of metal-organic gels of a rigid and angular diene with silver-salts of diverse anions: selective dye-sorption and luminescence by xerogels. Dalton Trans 2020; 49:13744-13752. [PMID: 32996983 DOI: 10.1039/d0dt02919j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Two similar types of dienes, one rigid and the other flexible, were explored for their gel formation abilities with Ag(i) salts. The rigid and angular dienes have shown an exceptional ability for gel formation with silver salts of nitrate, triflate, tetrafluoro borate and hexafluorophosphate. These metal-organic gels (MOGs) and their xerogels are found to have an excellent ability to undergo the photochemical [2 + 2] polymerization reaction upon irradiation. The reactions were monitored, and the products were characterized via1H NMR and MALDI-TOF analyses. Further, the solid-state luminescence behaviour and the selective dye-sorption of the gels have been explored before and after the photo-polymerization reaction.
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Affiliation(s)
- Rajorshi Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India.
| | - Kumar Biradha
- Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India.
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4
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Choi YJ, Jung D, Lim SI, Yoon WJ, Kim DY, Jeong KU. Diacetylene-Functionalized Dendrons: Self-Assembled and Photopolymerized Three-Dimensional Networks for Advanced Self-Healing and Wringing Soft Materials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33239-33245. [PMID: 32602691 DOI: 10.1021/acsami.0c08137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The physical properties of supramolecular soft materials strongly depend on the molecular packing structures constructed by thermodynamically and kinetically controlled molecular self-assembly. To investigate the relationship between molecular function and self-assembled molecular packing structure, a series of diacetylene (DA)-based supramolecules was synthesized by chemically connecting flexible dendrons to DA with amide (aDA-D) or ester (eDA-D) functions. The three-dimensional (3D) organogel network of amide-functionalized aDA-D was prepared in both polar and nonpolar solvents due to the intermolecular hydrogen bonding. 3D networks of aDA-D can be further stabilized by topochemical photopolymerization. The self-healing behavior of aDA-D was observed in the sheet-like structure formed in n-dodecane by the hydrophobic interaction between the gelator and solvent. The wringing behavior of aDA-D was also demonstrated using the dynamic interaction of amide function with n-butanol solvent. Kinetically controlled and photostabilized 3D networks can be a key component from biomedical devices to soft robotic applications.
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Affiliation(s)
- Yu-Jin Choi
- Department of Polymer-Nano Science and Technology, Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Daseal Jung
- Department of Polymer-Nano Science and Technology, Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Seok-In Lim
- Department of Polymer-Nano Science and Technology, Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Won-Jin Yoon
- Department of Polymer-Nano Science and Technology, Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Dae-Yoon Kim
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Bongdong 55324, Republic of Korea
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology, Department of Nanoconvergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
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5
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Effect of hydrogen bonding and hydrophobicity on gel emulsions by benzenesulphonamide moiety-based amphiphiles: entrapment and release of vitamin B12. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01102-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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6
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Mandal R, Garai A, Biradha K. Solid or gel? Which one works better for [2 + 2] photochemical polymerization in pyridine appended flexible phenylene 1, 4-bis-olefins by Ag(i) templation? Dalton Trans 2019; 48:17456-17460. [PMID: 31755494 DOI: 10.1039/c9dt04304g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two diene molecules were shown to undergo photopolymerization reactions in their metal-organic gels and xerogels, while their respective crystalline CPs are photostable. These reactions reveal the advantages of the gels and xerogels compared to their crystalline counterparts and also the utility of AgAg interactions in the gels to promote topochemical polymerizations.
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Affiliation(s)
- Rajorshi Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India.
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7
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Ma K, Chen W, Jiao T, Jin X, Sang Y, Yang D, Zhou J, Liu M, Duan P. Boosting the circularly polarized luminescence of small organic molecules via multi-dimensional morphology control. Chem Sci 2019; 10:6821-6827. [PMID: 31391904 PMCID: PMC6657416 DOI: 10.1039/c9sc01577a] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 06/01/2019] [Indexed: 12/22/2022] Open
Abstract
By regulating the composition of solvents, the assembled nanostructures of chiral molecules transformed from 0D nanospheres to 3D nanoflakes, which showed significantly amplified circularly polarized luminescence.
Achieving a higher dissymmetry factor is a crucial issue in developing circularly polarized luminescence (CPL) materials. Here, by tailoring the solvent composition and the morphology of the same chiral emissive small molecules (R- or S-SPAn), circularly polarized emission with a boosted dissymmetry factor (two orders) was realized. It was found that by regulating the water fraction in the mixed THF/H2O, we were able to achieve kinetic control over association of chiral emissive R- or S-SPAn into various nanostructures with 0D nanospheres, 2D nanoflakes and 3D stacked nanoflakes. These nanostructures are all CPL active. Remarkably, the dissymmetry factors of the nanostructures were significantly enhanced compared to those of the molecules and further boosted in different morphologies, from ∼10–4 (0D nanospheres) to 10–3 (2D flake) to ∼10–2 (3D nanoflakes). The enlarged glum value could be assigned to a good packing induced strong luminescence of an excimer. This strategy provides an efficient way to fabricate higher dissymmetry factor CPL organic nanomaterials by only changing the supramolecular architectures while using the same chiral small molecules.
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Affiliation(s)
- Kai Ma
- State Key Laboratory of Metastable Materials Science and Technology , Yanshan University , Qinhuangdao 066004 , P. R. China . .,CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ;
| | - Wenjie Chen
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ; .,Beijing National Laboratory for Molecular Science , CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , No. 2 ZhongGuanCun BeiYiJie , Beijing 100190 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Tifeng Jiao
- State Key Laboratory of Metastable Materials Science and Technology , Yanshan University , Qinhuangdao 066004 , P. R. China .
| | - Xue Jin
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ;
| | - Yutao Sang
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ; .,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Dong Yang
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ;
| | - Jin Zhou
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ;
| | - Minghua Liu
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ; .,Beijing National Laboratory for Molecular Science , CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics , Institute of Chemistry , Chinese Academy of Sciences , No. 2 ZhongGuanCun BeiYiJie , Beijing 100190 , P. R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Pengfei Duan
- CAS Center for Excellence in Nanoscience , CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , No. 11 ZhongGuanCun BeiYiTiao , Beijing 100190 , P. R. China . ; .,University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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8
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Cao X, Li Y, Gao A, Lv H. Regulation of gel formation, hierarchical structures, rheological behavior, and surface wettability via the linker of molecule center on bis(cholesteric) derivatives supramolecular self-assembly systems. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Dey A, Biradha K. Photochemical Reactions in Supramolecular Assemblies of Gels: Dimerizations and Polymerizations via Pericyclic Reactions. Isr J Chem 2018. [DOI: 10.1002/ijch.201800137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Avishek Dey
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur- 721302 India
| | - Kumar Biradha
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur- 721302 India
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10
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Hu H, Qiu Y, Wang J, Zhao D, Wang H, Wang Q, Liao Y, Peng H, Xie X. Photomodulated Morphologies in Halogen Bond–Driven Assembly during Gel–Sol Transition. Macromol Rapid Commun 2018; 40:e1800629. [DOI: 10.1002/marc.201800629] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 09/30/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Haisi Hu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Yuan Qiu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Jing Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Dongxu Zhao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Hong Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Qin Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Yonggui Liao
- Sino–US Joint Research Center on Liquid Crystal Chemistry and Physics National Anti‐counterfeit Engineering Research CenterHuazhong University of Science and Technology Wuhan 430074 China
| | - Haiyan Peng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology Wuhan 430074 China
| | - Xiaolin Xie
- Sino–US Joint Research Center on Liquid Crystal Chemistry and Physics National Anti‐counterfeit Engineering Research CenterHuazhong University of Science and Technology Wuhan 430074 China
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11
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Nandi S, Maji K, Haldar D. Self-Healing Hydrogel from a Dipeptide and HCl Sensing. ACS OMEGA 2018; 3:3744-3751. [PMID: 31458618 PMCID: PMC6641447 DOI: 10.1021/acsomega.8b00358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 03/22/2018] [Indexed: 05/03/2023]
Abstract
Ordered self-assembly of small organic molecules may induce novel properties in a supramolecular arrangement and can act as advance functional materials. This paper discusses the development of a new stimuli-responsive dipeptide hydrogelator containing l-phenylalanine and α-aminoisobutyric acid (Aib). The dipeptide Boc-Phe-Aib-OH, on addition with three equivalent of sodium hydroxide and water, transformed into a robust hydrogel. The transparent hydrogel is self-healing in nature. The instant gelation is highly selective toward sodium hydroxide and does not need any sonication or heating-cooling cycle. The thixotropic nature of the gel has been confirmed by rheological step-strain experiments at room temperature. Moreover, in the oil-water mixture, the compound exhibits phase-selective gelation. When the gel cylinder is cut into pieces, it does not conduct electricity, but once self-healing occurs, it conducts electricity. The diffusion of rhodamine 6G through the hydrogel indicates the dynamic nature. The hydrogel is highly sensitive toward HCl, that is, in the presence of HCl vapor, the gel becomes deformed.
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Affiliation(s)
- Sujay
Kumar Nandi
- Department of Chemical Sciences, Indian Institute of Science Education and Research
Kolkata, Mohanpur 741246, West Bengal, India
| | - Krishnendu Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research
Kolkata, Mohanpur 741246, West Bengal, India
| | - Debasish Haldar
- Department of Chemical Sciences, Indian Institute of Science Education and Research
Kolkata, Mohanpur 741246, West Bengal, India
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12
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Sang Y, Duan P, Liu M. Nanotrumpets and circularly polarized luminescent nanotwists hierarchically self-assembled from an achiralC3-symmetric ester. Chem Commun (Camb) 2018; 54:4025-4028. [DOI: 10.1039/c8cc02130a] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An achiralC3-symmetric molecule was found to self-assemble into various hierarchical nanostructures such as nanotwists, nanotrumpets and nanobelts, in which the twisted fibers showed supramolecular chirality as well as circularly polarized luminescence although the compound is achiral.
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Affiliation(s)
- Yutao Sang
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
- University of Chinese Academy of Sciences
- Beijing
| | - Pengfei Duan
- National Center for Nanoscience and Technology, China
- P. R. China
| | - Minghua Liu
- CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
- University of Chinese Academy of Sciences
- Beijing
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13
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Bai B, Li Z, Wang H, Li M, Ozaki Y, Wei J. Exploring the difference in xerogels and organogels through in situ observation. ROYAL SOCIETY OPEN SCIENCE 2018; 5:170492. [PMID: 29410792 PMCID: PMC5792869 DOI: 10.1098/rsos.170492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 01/04/2018] [Indexed: 05/31/2023]
Abstract
Solvent-gelator interactions play a key role in mediating organogel formation and ultimately determine the physico-chemical properties of the organogels and xerogels. The ethanol organogels of 1,4-bis[(3,4,5-trihexyloxy phenyl)hydrazide]phenylene (TC6) were investigated in situ by FT-IR, Raman and fluorescence spectra, and XRD, and it was confirmed that the intermolecular interaction and aggregation structure of TC6 ethanol organogels were quite different from those of xerogels. Simultaneously, unprecedented phase transition from organogel to suspension upon heating was observed in ethanol organogel, and the suspension phase exhibited lytropic liquid crystalline behaviour with a rectangular columnar structure. This study may open the possibility to design new gelators with a new dimension of versatility.
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Affiliation(s)
- Binglian Bai
- Key Laboratory for Automobile Materials (JLU), Ministry of Education, Jilin University, Changchun, People's Republic of China
- College of Physics, Jilin University, Changchun, People's Republic of China
| | - Zhiming Li
- College of Physics, Jilin University, Changchun, People's Republic of China
| | - Haitao Wang
- Key Laboratory for Automobile Materials (JLU), Ministry of Education, Jilin University, Changchun, People's Republic of China
| | - Min Li
- Key Laboratory for Automobile Materials (JLU), Ministry of Education, Jilin University, Changchun, People's Republic of China
| | - Yukihiro Ozaki
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
| | - Jue Wei
- College of Physics, Jilin University, Changchun, People's Republic of China
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14
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Chen S, An Z, Tong X, Chen Y, Ma M, Shi Y, Wang X. Stronger Intermolecular Forces or Closer Molecular Spacing? Key Impact Factor Research of Gelator Self-Assembly Mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14389-14395. [PMID: 29172526 DOI: 10.1021/acs.langmuir.7b03873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The benzene ring of low-molecular-weight gelators provides strong intermolecular forces but increases molecular spacing during self-assembly. To explore both of the above influences on the gel properties, we synthesize two gelators (Glu-CBZ and Glu-DPA) consisting of the same terminal long side chain but different aliphatic functional groups. The aliphatic functional groups are carbobenzoxy group and diphenyl phosphate group. The self-assembly driving forces, self-organization patterns, network morphologies, rheological properties, and the influences of solvents are researched through 1H NMR spectra, Fourier transform infrared spectra, field-emission scanning electron microscopy images, rheological characterizations curves, tube-inversion experiment, and calculation of van't Hoff plots. The results show that the carbobenzoxy group of Glu-CBZ makes molecules pack more tightly such that it improves the gel properties during static equilibrium. Whereas the diphenyl phosphate group of Glu-DPA provides stronger intermolecular forces, performing outstandingly during dynamic equilibrium. It is advantageous to further investigate the competitive relationship in gel system between the increased number of functional groups and the consequent steric effect.
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Affiliation(s)
- Si Chen
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Zhihang An
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Xiaoqian Tong
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Yining Chen
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Meng Ma
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Yanqin Shi
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
| | - Xu Wang
- College of Materials Science and Engineering, Zhejiang University of Technology , Hangzhou 310014, China
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15
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Krishnan BP, Sureshan KM. Topochemical Azide–Alkyne Cycloaddition Reaction in Gels: Size-Tunable Synthesis of Triazole-Linked Polypeptides. J Am Chem Soc 2017; 139:1584-1589. [DOI: 10.1021/jacs.6b11549] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Baiju P. Krishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, CET
Campus, Thiruvananthapuram, Kerala 695016, India
| | - Kana M. Sureshan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, CET
Campus, Thiruvananthapuram, Kerala 695016, India
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16
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Rogers MA, Marangoni AG. Kinetics of 12-Hydroxyoctadecanoic Acid SAFiN Crystallization Rationalized Using Hansen Solubility Parameters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12833-12841. [PMID: 27809551 DOI: 10.1021/acs.langmuir.6b03476] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Changes in solvent chemistry influenced kinetics of both nucleation and crystallization of 12-hydroxyoctadecenoic, as determined using differential scanning calorimetry and applying a modified Avrami model to the calorimetric data. Altering solvent properties influenced solvent-gelator compatibility, which in turn altered the chemical potential of the system at the onset of crystallization, the kinetics of gelation, and the resulting 12HOA crystal fiber length. The chemical potential at the onset of crystallization was linearly correlated to both the hydrogen-bonding Hansen solubility parameter and the solvent-gelator vectorial distance in Hansen space, Ra. Our work suggests that solvent properties can be modulated to affect the solubility of 12HOA, which in turn influences the kinetics of crystallization and the self-assembly of this organogelator into supramolecular crystalline structures. Therefore, modulation of solvent properties during organogelation can be used to control fiber length and thus engineer the physical properties of the gel.
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Affiliation(s)
- Michael A Rogers
- Department of Food Science, University of Guelph , Guelph, Ontario, Canada N1G 2W1
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Wang X, Xie F, Duan P, Liu M. Dynamic Evolution of Coaxial Nanotoruloid in the Self-Assembled Naphthyl-Containing l-Glutamide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12534-12541. [PMID: 27622531 DOI: 10.1021/acs.langmuir.6b02867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Supramolecular gelation provides an efficient way of fabricating functional soft materials with various nanostructures. Amphiphiles containing naphthyl group and dialkyl l-glutamide with a methylene spacer, 1NALG and 2NALG, have been designed and their self-assembly in various organic solvents were investigated. Both of these compounds formed organogels in organic solvents. In the case of the alcohol solvents, the initially formed organogel underwent gel-precipitate transformation, which process was monitored by the UV-vis, CD spectra, and SEM observation. It was revealed that both the compounds formed the nanofiber structures in gel phases. Interestingly, in alcohol solvents, during the phase transition from the gel to precipitates, the nanofibers gradually transformed into a series of long coaxial solid nanotoruloid, a unique nanostructure that has never been observed in other self-assembly systems. In addition, during the gel formation, the nanofibers with supramolecular chirality or M-chirality were obtained. However, the coaxial nanotoruloid showed an inversed P-chirality. Comprehensive analysis based on various data and the gelator structure, substituent position, type of organic solvents, it was suggested that the synergistic interactions between the amide H-bond and π-π stacking of the naphthyl groups played important roles in the formation of the gels as well as the nanofiber, while the H-bonding ability of alcohol to the amide group can subtly regulate the gelator-gelator interactions and lead to the dynamic and hierarchical evolution of the unique nanostructures.
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Affiliation(s)
- Xiufeng Wang
- College of Science, China University of Petroleum (East China) , Qingdao 266580, Shandong China
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
| | - Fan Xie
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
| | - Pengfei Duan
- Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology , Beijing 100190, China
| | - Minghua Liu
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics, Institute of Chemistry Chinese Academy of Sciences , Beijing 100190, China
- Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology , Beijing 100190, China
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Zhang C, Zhang T, Ji N, Zhang Y, Bai B, Wang H, Li M. Gelation behaviour of a bent-core dihydrazide derivative: effect of incubation temperature in chloroform and toluene. SOFT MATTER 2016; 12:1525-1533. [PMID: 26659559 DOI: 10.1039/c5sm02535d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this work, a new kind of gelator, 1,3-bis[(3,4-dioctyloxy phenyl) hydrazide]phenylene (BP8-C), containing two dihydrazide units as the rigid bent-core, has been synthesized and investigated. It was demonstrated that BP8-C is an efficient gelator which can gel various organic solvents, such as ethanol, benzene, toluene, chloroform, etc. Both an opaque gel (O-gel) and a transparent gel (T-gel), which is more stable, were obtained with BP8-C in chloroform at different incubation temperatures. Kinetic data based on fluorescence spectra revealed that the T-gels showed a larger Avrami parameter (n = 1.44 at 20 °C) than that of the O-gels (n = 1.21 for gelation at temperatures below 0 °C). While BP8-C did form the opaque gel in toluene, gelation took longer at lower incubation temperatures and even precipitated out below 0 °C. The kinetic Avrami analysis on sols of BP8-C with different concentrations shows a two-phrase mechanism, i.e. the n values are between 0.88 and 1.74 followed by 1.69 and 3.01 throughout the temperature range of 5 °C and 35 °C for 5.34 mg mL(-1) BP8-C in toluene, indicating that the fibers formed first and then bundled to produce compact networks. We propose that supersaturation governs the formation of gel in chloroform and that the diffusion process denominates gelation in toluene. XRD and FT-IR measurements confirmed that the xerogels prepared at different temperatures in different solvents exhibited a Col(h) structure and that there are three molecules in one columnar slice. Our results indicate that the gelation process, morphology of the gels and thus the final properties of the gels depend strongly on the preparation conditions such as temperature, solvent, concentration, etc.
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Affiliation(s)
- Chunxue Zhang
- Key Laboratory of Automobile Materials, Ministry of Education, Institute of Materials Science and Engineering, Jilin University, Changchun 130012, People's Republic of China.
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Affiliation(s)
- Minghua Liu
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Li Zhang
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Tianyu Wang
- Beijing National Laboratory for Molecular Science (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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20
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Lan Y, Corradini MG, Weiss RG, Raghavan SR, Rogers MA. To gel or not to gel: correlating molecular gelation with solvent parameters. Chem Soc Rev 2015; 44:6035-58. [PMID: 25941907 DOI: 10.1039/c5cs00136f] [Citation(s) in RCA: 208] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Rational design of small molecular gelators is an elusive and herculean task, despite the rapidly growing body of literature devoted to such gels over the past decade. The process of self-assembly, in molecular gels, is intricate and must balance parameters influencing solubility and those contrasting forces that govern epitaxial growth into axially symmetric elongated aggregates. Although the gelator-gelator interactions are of paramount importance in understanding gelation, the solvent-gelator specific (i.e., H-bonding) and nonspecific (dipole-dipole, dipole-induced and instantaneous dipole induced forces) intermolecular interactions are equally important. Solvent properties mediate the self-assembly of molecular gelators into their self-assembled fibrillar networks. Herein, solubility parameters of solvents, ranging from partition coefficients (log P), to Henry's law constants (HLC), to solvatochromic parameters (ET(30)), and Kamlet-Taft parameters (β, α and π), and to Hansen solubility parameters (δp, δd, δh), are correlated with the gelation ability of numerous classes of molecular gelators. Advanced solvent clustering techniques have led to the development of a priori tools that can identify the solvents that will be gelled and not gelled by molecular gelators. These tools will greatly aid in the development of novel gelators without solely relying on serendipitous discoveries. These tools illustrate that the quest for the universal gelator should be left in the hands of Don Quixote and as researchers we must focus on identifying gelators capable of gelling classes of solvents as there is likely no one gelator capable of gelling all solvents.
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Affiliation(s)
- Y Lan
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
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21
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Miao W, Yang D, Liu M. Multiple-Stimulus-Responsive Supramolecular Gels and Regulation of Chiral Twists: The Effect of Spacer Length. Chemistry 2015; 21:7562-70. [DOI: 10.1002/chem.201500097] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/10/2015] [Indexed: 01/07/2023]
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22
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Jin Q, Li J, Zhang L, Fang S, Liu M. Reactive organogels based on isoxazole esters: alkali metal ions selective gelation and crystallization. CrystEngComm 2015. [DOI: 10.1039/c5ce00826c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A methanol solution of a series of simple esters exhibited a response to different alkali bases, which formed solutions, organogels and crystals, respectively, when LiOH, NaOH and KOH were separately introduced.
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Affiliation(s)
- Qingxian Jin
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou, PR China
| | - Jing Li
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou, PR China
- Beijing National Laboratory for Molecular Science
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics
| | - Li Zhang
- Beijing National Laboratory for Molecular Science
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing, 100190 PR China
| | - Shaoming Fang
- Henan Provincial Key Laboratory of Surface & Interface Science
- Zhengzhou University of Light Industry
- Zhengzhou, PR China
| | - Minghua Liu
- Beijing National Laboratory for Molecular Science
- CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing, 100190 PR China
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Xue P, Wang P, Yao B, Sun J, Gong P, Zhang Z, Qian C, Lu R. Nanofibers of hydrogen-bonded two-component gel with closely connected p- and n-channels and photoinduced electron transfer. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21426-21434. [PMID: 25347786 DOI: 10.1021/am506422m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An D-A-D gelator (DTCQ) was designed and synthesized using 2,3-dimethyl-5,8-di(thiophen-2-yl)quinoxaline and N-alkyl 3-aminocarbazole units as acceptor and donor, respectively, which were linked by a single bond. The compound could gelate several solvents, such as benzyl alcohol, aniline, acetophenone, and o-dichlorobenzene, as well as self-assemble into one-dimensional (1D) nanofibers in gel phase. The absorption and infrared spectra of the gels indicated that π-π interactions between aromatic moieties, intermolecular hydrogen bonds between amide units, and van der Waals forces were the driving forces for the formation of 1D self-assemblies and gel. DTCQ gel was red and emits red fluorescence because it has a strong absorption band at 487 nm and an emissive band at 620 nm. Moreover, DTCQ and a fullerene carboxylic acid formed two-component gel, in which the two compounds developed a hydrogen bond complex and self-assembled into 1D nanofibers with closely connected p- and n-channels. The nanofibrous xerogel film can rapidly generate a photocurrent under visible-light radiation through electron transfer from the gelator to fullerene, and then, the excellent exciton separation and charge transfer to two electrodes.
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Affiliation(s)
- Pengchong Xue
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699# Qianjin Street, Changchun 130012, P. R. China
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