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Das G, Anand A, Vedhanarayanan B, Padmakumar A, Praveen VK, Ajayaghosh A. Controlling the Morphological Features, Aspect Ratio and Emission Patterns of Supramolecular Copolymers by Restricted Dimensional Growth. Chemistry 2023; 29:e202301819. [PMID: 37498316 DOI: 10.1002/chem.202301819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/28/2023]
Abstract
One of the bottlenecks associated with supramolecular polymerization of functional π-systems is the spontaneous assembly of monomers leading to one- or two-dimensional (1D or 2D) polymers without control over chain length and optical properties. In the case of supramolecular copolymerization of monomers that are structurally too diverse, preferential self-sorting occurs unless they are closely interacting donor-acceptor pairs. Herein, it is established that the spontaneous 1D polymerization of a phenyleneethynylene (PE) derivative and the 2D polymerization of a Bodipy derivative (BODIPY) can be controlled by copolymerizing them in different ratios, leading to unusual spindle-shaped structures with controlled aspect ratio, as evident by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and confocal laser scanning microscopy (CLSM) studies. For example, when the content of BODIPY is 50 % in the BODIPY-PE mixture, the 1D polymerization of PE is significantly restricted to form elongated spindle-like structures having an aspect ratio of 4-6. The addition of 75 % of BODIPY to PE resulted in circular spindles having an aspect ratio of 1-2.5, thereby completely restricting the 1D polymerization of PE monomers. Moreover, the resultant supramolecular copolymers exhibited morphology and aspect ratio dependent emission features as observed by the time-resolved emission studies.
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Affiliation(s)
- Gourab Das
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Anjali Anand
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Balaraman Vedhanarayanan
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
| | - Akhil Padmakumar
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Vakayil K Praveen
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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2
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Rhoomi Z, Ahmed DS, Jabir MS, Balasubramanian B, Al-Garadi MA, Swelum AA. Facile Hydrothermal Synthesis of BiVO 4/MWCNTs Nanocomposites and Their Influences on the Biofilm Formation of Multidrug Resistance Streptococcus mutans and Proteus mirabilis. ACS OMEGA 2023; 8:37147-37161. [PMID: 37841170 PMCID: PMC10569021 DOI: 10.1021/acsomega.3c04722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023]
Abstract
This study utilized a simple hydrothermal technique to prepare pure BiVO4 and tightly bound BiVO4/multiwalled carbon nanotubes (MWCNTs) nanocomposite materials. The surfactant was employed to control the growth, size, and assembly of BiVO4 and the nanocomposite. Various techniques including X-ray diffraction (XRD), Ultraviolet-visible (UV-vis), photoluminescence (PL), Raman, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) were utilized to analyze and characterize BiVO4 and the BiVO4/MWCNTs nanocomposite. Through XRD analysis, it was found that the carbon nanotubes were effectively embedded within the lattice of BiVO4 without generating any separate impurity phase and had no influence on the BiVO4 monoclinic structure. TEM images confirmed the presence of MWCNTs within BiVO4. Furthermore, adding MWCNTs in the BiVO4/MWCNTs nanocomposite resulted in an effective charge transfer transition and improved carrier separation, as evidenced by PL analysis. The introduction of MWCNTs also led to a significant reduction in the optical band gap due to quantum effects. Finally, the antibacterial activity of pure BiVO4 and the BiVO4/MWCNTs nanocomposite was assessed by exposing Proteus mirabilis and Streptococcus mutans to these materials. Biofilm inhibition and antibiofilm activity were measured using a crystal violet assay and a FilmTracer LIVE/DEAD Biofilm Viability Kit. The results demonstrated that pure BiVO4 and BiVO4/MWCNTs effectively inhibited biofilm formation. In conclusion, both pure BiVO4 and BiVO4/MWCNTs are promising materials for inhibiting the bacterial biofilm during bacterial infections.
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Affiliation(s)
- Zeena
R. Rhoomi
- Applied
Sciences Department, University of Technology, Baghdad 11231, Iraq
| | - Duha S. Ahmed
- Applied
Sciences Department, University of Technology, Baghdad 11231, Iraq
| | - Majid S. Jabir
- Applied
Sciences Department, University of Technology, Baghdad 11231, Iraq
| | | | - Maged A. Al-Garadi
- Department
of Animal Production, College of Food and Agriculture Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Ayman A. Swelum
- Department
of Animal Production, College of Food and Agriculture Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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3
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Roy S, Maji TK. Self-assembled organic and hybrid materials derived from oligo-( p-phenyleneethynylenes). Chem Commun (Camb) 2022; 58:4149-4167. [PMID: 35274120 DOI: 10.1039/d2cc00186a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oligo-(p-Phenyleneethynylenes) (OPEs) have garnered widespread interest over the past three decades due to their excellent opto-electronic properties. However, the chief focus has been on the use of mainly small molecules or polymeric systems for the study of their structural diversity in opto-electronic applications. Recently, researchers have started delving deeper into their utility in material applications. Purely organic materials such as supramolecular polymers, self-assembled nanostructures, nanostructured organogels and single-crystalline materials derived from OPEs have already been developed and researched. Chirality has also been introduced into these systems. Additionally, these have shown physical properties such as polymorphism, liquid crystallinity, melt formation, mechanochromism, etc. All these materials have also shown excellent luminescence properties with high quantum yield and some have even shown energy harvesting properties. There have also been sporadic reports on OPE linker based hybrid systems such as metallogels and metal-organic framework (MOF) structures where structural analysis reveals the origin of tunable emission in these materials. Furthermore, by innovative structural design, unexplored properties of OPEs such as water repellency, bioimaging, drug delivery, photocatalysis, energy transfer, nanomorphology control, photoconductivity, and colour tunability could be achieved. This feature article will, therefore, encompass a detailed discussion on the development of this field as well as the analysis of the properties realized in OPE derived self-assembled supramolecular materials. The main focus will be on the following classes of materials: soft supramolecular materials, crystalline supramolecular π-systems, nanoscale metal-organic frameworks (NMOFs) and bulk metal-organic frameworks (MOFs) and how their application horizon has been expanded by integrating OPEs into their structures.
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Affiliation(s)
- Syamantak Roy
- Molecular Materials Laboratory, Chemistry and Physics of Materials Unit, School of Advanced Material (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
| | - Tapas Kumar Maji
- Molecular Materials Laboratory, Chemistry and Physics of Materials Unit, School of Advanced Material (SAMat), Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
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4
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Chakraborty S, Varghese S, Ghosh S. Supramolecular Nanowires from an Acceptor-Donor-Acceptor Conjugated Chromophore. Chemistry 2019; 25:16725-16731. [PMID: 31638289 DOI: 10.1002/chem.201904463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/18/2019] [Indexed: 01/24/2023]
Abstract
Oligothiophene derivatives have been extensively studied as p-type semiconducting materials in organic electronics applications. This work reports the synthesis, self-assembly and photophysical properties of acceptor-donor-acceptor (A-D-A)-type oligothiophene derivatives by end-group engineering of quaterthiophene (QT) with naphthalene monoimide (NMI) chromophores that are further connected to a trialkoxy benzamide wedge. Conjugation to the NMI units reduces the HOMO-LUMO gap significantly, and consequently the absorption spectrum exhibits a bathochromic shift of about 50 nm compared with QT. Furthermore, extended H-bonding interactions among the amido groups of the peripheral wedges produce entangled fibrillar nanostructures and gelation in hydrocarbon solvents such as methylcyclohexane, wherein the A-D-A chromophore exhibits typical H-aggregation. On the contrary, the fact that the same chromophore, lacking only the amido units, does not produce gels or H-aggregates indicates strong impact of H-bonding on the self-assembly. Computational studies revealed the electronic properties of the chromophore and predicted the geometry of a dimer in the H-aggregate that reasonably matches with the experimental results. Bulk electrical conductivity measurements determined an excellent conductivity of 2.3×10-2 S cm-1 for the H-aggregated system (OT-1), which is two orders of magnitude higher than that of the same chromophore lacking the amido groups (OT-2).
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Affiliation(s)
| | - Shinto Varghese
- Technical Research Center, Indian Association for the Cultivation of, Science, 2A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary Sciences, India.,Technical Research Center, Indian Association for the Cultivation of, Science, 2A and 2B Raja S. C. Mullick Road, Kolkata, 700032, India
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5
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Zafrani Y, Kaizerman D, Hadar M, Bigan N, Granot E, Ghosh M, Adler-Abramovich L, Patolsky F, Cohen Y. Pillararene-Based Two-Component Thixotropic Supramolecular Organogels: Complementarity and Multivalency as Prominent Motifs. Chemistry 2018; 24:15750-15755. [PMID: 29745993 DOI: 10.1002/chem.201801418] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/09/2018] [Indexed: 02/05/2023]
Abstract
Rationally designed two-component supramolecular organogels based on multiple chemical interactions between percarboxylato- and peramino-pillararenes are described. Mixing low concentration solutions (<1 % w/v) of decacarboxylato-pillar[5]arene (1) with decaamino-pillar[5]arenes (2 b-d) affords, rapidly and without heating, organogels displaying an exceptional combination of properties. These supramolecular organogels, the characteristics of which are tunable, were found to be thixotropic and thermally stable, with Tgel values in some cases exceeding the boiling point of the embedded solvent. It is demonstrated that both structural complementarity and multivalency are important determinants in the gelation process of these attractive soft materials.
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Affiliation(s)
- Yossi Zafrani
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel.,Department of Organic Chemistry, Israel Institute for Biological Research, Ness-Ziona, 740000, Israel
| | - Dana Kaizerman
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Maya Hadar
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Nitzan Bigan
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Eran Granot
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Moumita Ghosh
- Department of Oral Biology, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Lihi Adler-Abramovich
- Department of Oral Biology, Goldschleger School of Dental Medicine, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Fernando Patolsky
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
| | - Yoram Cohen
- School of Chemistry, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978, Tel Aviv, Israel
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6
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Majumdar R, Bag BG. Evolution of Vesicular Self‐Assemblies of the Salts of a Natural Triterpenoid Arjunolic Acid into Superstructured Ambidextrous Gels and Study of Their Entrapment Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201702270] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rakhi Majumdar
- Department of Chemistry and Chemical TechnologyVidyasagar University Midnapore 721102, West Bengal India
- Nano Science and Synthetic Leaf Laboratory, Downing HallCenter for Healthcare Science and TechnologyIndian Institute of Engineering Science and Technology Shibpur India
| | - Braja Gopal Bag
- Department of Chemistry and Chemical TechnologyVidyasagar University Midnapore 721102, West Bengal India
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7
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Bag BG, Majumdar R. Self-assembly of Renewable Nano-sized Triterpenoids. CHEM REC 2017; 17:841-873. [PMID: 28195390 DOI: 10.1002/tcr.201600123] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Braja Gopal Bag
- Department of Chemistry and Chemical Technology; Vidyasagar Univesity; Midnapore 721102, West Bengal India
| | - Rakhi Majumdar
- Department of Chemistry and Chemical Technology; Vidyasagar Univesity; Midnapore 721102, West Bengal India
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8
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Thelu HVP, Albert SK, Golla M, Krishnan N, Yamijala SB, Nair SV, Srinivasula SM, Varghese R. DNA-Decorated Luminescent Vesicles as Drug Carriers. ChemistrySelect 2016. [DOI: 10.1002/slct.201600897] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hari Veera Prasad Thelu
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Shine K. Albert
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Murali Golla
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Nithiyanandan Krishnan
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | | | | | | | - Reji Varghese
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
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9
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Shen B, He Y, Kim Y, Wang Y, Lee M. Spontaneous Capture of Carbohydrate Guests through Folding and Zipping of Self-Assembled Ribbons. Angew Chem Int Ed Engl 2016; 55:2382-6. [DOI: 10.1002/anie.201509190] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/22/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Bowen Shen
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Ying He
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Yongju Kim
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Yanqiu Wang
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Myongsoo Lee
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
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10
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Shen B, He Y, Kim Y, Wang Y, Lee M. Spontaneous Capture of Carbohydrate Guests through Folding and Zipping of Self-Assembled Ribbons. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509190] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bowen Shen
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Ying He
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Yongju Kim
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Yanqiu Wang
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
| | - Myongsoo Lee
- State Key Laboratory of Supramolecular Structure and Materials; College of Chemistry; Jilin University; Changchun 130012 China
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11
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Zhang J, Marega R, Chen LJ, Wu NW, Xu XD, Muddiman DC, Bonifazi D, Yang HB. Hierarchical Self-Assembly of Supramolecular Hydrophobic Metallacycles into Ordered Nanostructures. Chem Asian J 2014; 9:2928-36. [DOI: 10.1002/asia.201402410] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Indexed: 12/14/2022]
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12
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Albert SK, Thelu HVP, Golla M, Krishnan N, Chaudhary S, Varghese R. Self-assembly of DNA-oligo(p-phenylene-ethynylene) hybrid amphiphiles into surface-engineered vesicles with enhanced emission. Angew Chem Int Ed Engl 2014; 53:8352-7. [PMID: 24962762 DOI: 10.1002/anie.201403455] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/19/2014] [Indexed: 11/09/2022]
Abstract
Surface-addressable nanostructures of linearly π-conjugated molecules play a crucial role in the emerging field of nanoelectronics. Herein, by using DNA as the hydrophilic segment, we demonstrate a solid-phase "click" chemistry approach for the synthesis of a series of DNA-chromophore hybrid amphiphiles and report their reversible self-assembly into surface-engineered vesicles with enhanced emission. DNA-directed surface addressability of the vesicles was demonstrated through the integration of gold nanoparticles onto the surface of the vesicles by sequence-specific DNA hybridization. This system could be converted to a supramolecular light-harvesting antenna by integrating suitable FRET acceptors onto the surface of the nanostructures. The general nature of the synthesis, surface addressability, and biocompatibility of the resulting nanostructures offer great promises for nanoelectronics, energy, and biomedical applications.
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Affiliation(s)
- Shine K Albert
- School of Chemistry, Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM), CET campus, Trivandrum-695016 (India)
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13
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Albert SK, Thelu HVP, Golla M, Krishnan N, Chaudhary S, Varghese R. Self-Assembly of DNA-Oligo(p-phenylene-ethynylene) Hybrid Amphiphiles into Surface-Engineered Vesicles with Enhanced Emission. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403455] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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14
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Babu SS, Praveen VK, Kartha KK, Mahesh S, Ajayaghosh A. Effect of the Bulkiness of the End Functional Amide Groups on the Optical, Gelation, and Morphological Properties of Oligo(p-phenylenevinylene) π-Gelators. Chem Asian J 2014; 9:1830-40. [DOI: 10.1002/asia.201402235] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Indexed: 01/09/2023]
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15
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Gainaru C, Figuli R, Hecksher T, Jakobsen B, Dyre JC, Wilhelm M, Böhmer R. Shear-modulus investigations of monohydroxy alcohols: evidence for a short-chain-polymer rheological response. PHYSICAL REVIEW LETTERS 2014; 112:098301. [PMID: 24655283 DOI: 10.1103/physrevlett.112.098301] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Indexed: 06/03/2023]
Abstract
Liquids composed of small-molecule monohydroxy alcohols are demonstrated to display rheological behavior typical for oligomeric chains. This observation was made possible by rheological experiments in which more than seven decades in frequency and more than five decades on the mechanical modulus scale are covered. The singly hydrogen-bonded monohydroxy alcohols were chosen because they display significant, but surprisingly poorly understood effects of intermolecular association. Based on the present shear study, one can apply theoretical concepts of polymer science to understand the anomalous physical behavior of a wide range of hydrogen-bonded liquids.
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Affiliation(s)
- C Gainaru
- Fakultät für Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - R Figuli
- Karlsruher Institut für Technologie, 76128 Karlsruhe, Germany
| | - T Hecksher
- DNRF Centre "Glass and Time", IMFUFA, Department of Sciences, Roskilde University, Postbox 260, DK-4000 Roskilde, Denmark
| | - B Jakobsen
- DNRF Centre "Glass and Time", IMFUFA, Department of Sciences, Roskilde University, Postbox 260, DK-4000 Roskilde, Denmark
| | - J C Dyre
- DNRF Centre "Glass and Time", IMFUFA, Department of Sciences, Roskilde University, Postbox 260, DK-4000 Roskilde, Denmark
| | - M Wilhelm
- Karlsruher Institut für Technologie, 76128 Karlsruhe, Germany
| | - R Böhmer
- Fakultät für Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
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16
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Bag BG, Majumdar R. Vesicular self-assembly of a natural triterpenoid arjunolic acid in aqueous medium: study of entrapment properties and in situ generation of gel–gold nanoparticle hybrid material. RSC Adv 2014. [DOI: 10.1039/c4ra08710k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Formation of vesicular gel and gel–gold nanoparticle hybrid material from arjunolic acid extractable from the saw-dust of Terminalia arjuna.
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Affiliation(s)
- Braja Gopal Bag
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 72102, India
| | - Rakhi Majumdar
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 72102, India
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17
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Das A, Ghosh S. Stimuli-Responsive Self-Assembly of a Naphthalene Diimide by Orthogonal Hydrogen Bonding and Its Coassembly with a Pyrene Derivative by a Pseudo-Intramolecular Charge-Transfer Interaction. Angew Chem Int Ed Engl 2013; 53:1092-7. [DOI: 10.1002/anie.201308396] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Indexed: 01/06/2023]
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18
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Das A, Ghosh S. Stimuli-Responsive Self-Assembly of a Naphthalene Diimide by Orthogonal Hydrogen Bonding and Its Coassembly with a Pyrene Derivative by a Pseudo-Intramolecular Charge-Transfer Interaction. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308396] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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19
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Xu S, Das S, Ogi S, Sugiyasu K, Okazaki H, Takano Y, Yasuda T, Deguchi K, Ohki S, Shimizu T, Takeuchi M. Synthesis of polyaniline with low polydispersity by using a supramolecular ionic assembly as the reaction medium. Chemistry 2013; 19:5824-9. [PMID: 23520047 DOI: 10.1002/chem.201204134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/22/2013] [Indexed: 11/12/2022]
Abstract
A supramolecular ionic assembly comprised of an anionic oligo(phenylene ethynylene) and anilinium cations provides a unique reaction medium in which anilinum cations are concentrated and aligned. The oxidative polymerization (see figure) of aniline using the supramolecular ionic assembly (gray) yielded polyaniline (green/blue) with a number-average molar mass of 20,500 and polydispersity of 1.3.
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Affiliation(s)
- Shaoan Xu
- Organic Materials Group, National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba 305-0047, Japan
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20
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Bag BG, Majumdar R, Dinda SK, Dey PP, Maity GC, Mallia VA, Weiss RG. Self-assembly of ketals of arjunolic acid into vesicles and fibers yielding gel-like dispersions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1766-1778. [PMID: 23305252 DOI: 10.1021/la304485e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ten aliphatic and aromatic ketals of arjunolic acid, a renewable, nanosized triterpenic acid which is obtainable from Terminalia arjuna, have been synthesized upon condensation with aldehydes. Self-assembly properties of the ketals have been studied in a wide range of organic liquids. With the exception of the p-nitrobenzylidene derivative, low concentrations of the ketals self-assemble and form gel-like dispersions in many of the organic liquids examined. The morphologies of the assemblies, studied at different distance scales by optical, electron, and atomic-force microscopies, consisted of fibrillar networks and vesicles which were able to entrap 5(6)-carboxyfluorescein as a guest molecule. X-ray diffractograms indicate that the fibrillar objects are crystalline. A charge-transfer complex was formed from a 1:1 mixture of ketal derivatives with electron-donating and electron-accepting groups, and the 9-anthrylidene derivative in its fibrillar network dimerized upon irradiation. Results demonstrate that subtle changes in the ketal structures can lead to very different aggregation pathways.
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Affiliation(s)
- Braja G Bag
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
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Aparicio F, García F, Sánchez L. Supramolecular polymerization of C3-symmetric organogelators: cooperativity, solvent, and gelation relationship. Chemistry 2013; 19:3239-48. [PMID: 23345173 DOI: 10.1002/chem.201202584] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 11/30/2012] [Indexed: 11/11/2022]
Abstract
A systematic study of the influence of solvent and the size of C(3)-symmetric discotics on their supramolecular polymerization mechanism is presented. The cooperativity of the self-assembly of the reported compounds is directly related to their gelation ability. The two series of C(3)-symmetric discotics investigated herein are based on benzene-1,3,5-tricarboxamides (BTAs) and oligo(phenylene ethynylene)-based tricarboxamides (OPETAs) that are peripherally decorated with achiral (1a and 2a) or chiral N-(2-aminoethyl)-3,4,5-trialkoxybenzamide units (1b and 2b). The supramolecular polymerization of compounds 1a,b and 2a,b has been exhaustively investigated in a number of solvents and by using various techniques: variable-temperature circular dichroism (VT-CD) spectroscopy, concentration-dependent (1)H NMR spectroscopy, and isothermal titration calorimetry (ITC). The supramolecular polymerization mechanism of compounds 2 is highly cooperative in solvents such as methylcyclohexane and toluene and is isodesmic in CHCl(3). Unexpectedly, chiral compound 1b is practically CD-silent, in contrast with previously reported BTAs. ITC measurements in CHCl(3) demonstrated that the supramolecular polymerization of BTA 1a is isodesmic. These results confirm the strong influence of the π-surface of the central aromatic core of the studied discotic and the branched nature of the peripheral side chains on the supramolecular polymerization. The gelation ability of these organogelators is negated in CHCl(3), in which the supramolecular polymerization mechanism is isodesmic.
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Affiliation(s)
- Fátima Aparicio
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria s/n., 28040 Madrid, Spain
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Fernández G, Stolte M, Stepanenko V, Würthner F. Cooperative supramolecular polymerization: comparison of different models applied on the self-assembly of bis(merocyanine) dyes. Chemistry 2012; 19:206-17. [PMID: 23169524 DOI: 10.1002/chem.201202679] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 10/17/2012] [Indexed: 11/08/2022]
Abstract
Three new molecular building blocks 1 a-c for supramolecular polymerization are described that feature two dipolar merocyanine dyes tethered by p-xylylene spacers. Concentration- and temperature-dependent UV/Vis spectroscopy in chloroform combined with dynamic light scattering, capillary viscosimetry and atomic force microscopy investigations were applied to elucidate the mechanistic features of the self-assembly of these strongly dipolar dyes. Our detailed studies reveal that the self-assembly is very pronounced for bis(merocyanines) 1 a,b bearing linear alkyl chains, but completely absent for bis(merocyanine) 1 c bearing sterically more bulky ethylhexyl substituents. Both temperature- and concentration-dependent UV/Vis data provide unambiguous evidence for a cooperative self-assembly process for bis(merocyanines) 1 a,b, which was analyzed in detail by the Meijer-Schenning-Van-der-Schoot model (applicable to temperature-dependent data) and by the Goldstein-Stryer model (applicable to concentration-dependent data). By combining both methods all parameters of interest to understand the self-assembly process could be derived, including in particular the nucleus size (8-10 monomeric units), the cooperativity factor (ca. 0.006), and the nucleation and elongation constants of about 10(3) and 10(6) M(-1) in chloroform at room temperature, respectively.
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Affiliation(s)
- Gustavo Fernández
- Universität Würzburg, Institut für Organische Chemie and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany
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Xu XD, Zhang J, Yu X, Chen LJ, Wang DX, Yi T, Li F, Yang HB. Design and Preparation of Platinum-Acetylide Organogelators Containing Ethynyl-Pyrene Moieties as the Main Skeleton. Chemistry 2012; 18:16000-13. [DOI: 10.1002/chem.201202902] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Indexed: 12/23/2022]
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Mayoral MJ, Rest C, Schellheimer J, Stepanenko V, Fernández G. Narcissistic versus social self-sorting of oligophenyleneethynylene derivatives: from isodesmic self-assembly to cooperative co-assembly. Chemistry 2012; 18:15607-11. [PMID: 23132726 DOI: 10.1002/chem.201202367] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 10/01/2012] [Indexed: 12/21/2022]
Abstract
Narcissistic versus social! The self-assembly of two structurally related oligophenyleneethynylene derivatives featuring polar or nonpolar peripheral chains is reported. Their remarkable narcissistic versus social self-sorting behaviour in aqueous media can be controlled by concentration and solvent changes.
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Florian A, Mayoral MJ, Stepanenko V, Fernández G. Alternated Stacks of Nonpolar Oligo(p-phenyleneethynylene)-BODIPY Systems. Chemistry 2012; 18:14957-61. [DOI: 10.1002/chem.201203279] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Indexed: 12/21/2022]
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Bag BG, Paul K. Vesicular and Fibrillar Gels by Self-Assembly of Nanosized Oleanolic Acid. ASIAN J ORG CHEM 2012. [DOI: 10.1002/ajoc.201200032] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Das A, Molla MR, Maity B, Koley D, Ghosh S. Hydrogen-bonding induced alternate stacking of donor (D) and acceptor (A) chromophores and their supramolecular switching to segregated states. Chemistry 2012; 18:9849-59. [PMID: 22782621 DOI: 10.1002/chem.201201140] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Indexed: 11/10/2022]
Abstract
This paper reports comprehensive studies on the mixed assembly of bis-(trialkoxybenzamide)-functionalized dialkoxynaphthalene (DAN) donors and naphthalene-diimide (NDI) acceptors due the cooperative effects of hydrogen bonding, charge-transfer (CT) interactions, and solvophobic effects. A series of DAN as well as NDI building blocks have been examined (wherein the relative distance between the two amide groups in a particular chromophore is the variable structural parameter) to understand the structure-dependent variation in mode of supramolecular assembly and morphology (organogel, reverse vesicle, etc.) of the self-assembled material. Interestingly, it was observed that when the amide functionalities are introduced to enhance the self-assembly propensity, the mode of co-assembly among the DAN and NDI chromophores no longer remained trivial and was dictated by a relatively stronger hydrogen-bonding interaction instead of a weak CT interaction. Consequently, in a highly non-polar solvent like methylcyclohexane (MCH), although kinetically controlled CT-gelation was initially noticed, within a few hours the system sacrificed the CT-interaction and switched over to the more stable self-sorted gel to maximize the gain in enthalpy from the hydrogen-bonding interaction. In contrast, in a relatively less non-polar solvent such as tetrachloroethylene (TCE), in which the strength of hydrogen bonding is inherently weak, the contribution of the CT interaction also had to be accounted for along with hydrogen bonding leading to a stable CT-state in the gel or solution phase. The stability and morphology of the CT complex and rate of supramolecular switching (from CT to segregated state) were found to be greatly influenced by subtle structural variation of the building blocks, solvent polarity, and the DAN/NDI ratio. For example, in a given D-A pair, by introducing just one methylene unit in the spacer segment of either of the building blocks a complete change in the mode of co-assembly (CT state or segregated state) and the morphology (1D fiber to 2D reverse vesicle) was observed. The role of solvent polarity, structural variation, and D/A ratio on the nature of co-assembly, morphology, and the unprecedented supramolecular-switching phenomenon have been studied by detail spectroscopic and microscopic experiments in a gel as well as in the solution state and are well supported by DFT calculations.
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Affiliation(s)
- Anindita Das
- Polymer Science Unit, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Rd. Kolkata-700032, India
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Gopal A, Varghese R, Ajayaghosh A. Oligo(p-phenylene-ethynylene)-derived super-π-gelators with tunable emission and self-assembled polymorphic structures. Chem Asian J 2012; 7:2061-7. [PMID: 22753295 DOI: 10.1002/asia.201200410] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Indexed: 11/09/2022]
Abstract
Linear π-conjugated oligomers are known to form organogels through noncovalent interactions. Herein, we report the effect of π-repeat units on the gelation and morphological properties of three different oligo(p-phenylene-ethynylene)s: OPE3, OPE5, and OPE7. All of these molecules form fluorescent gels in nonpolar solvents at low critical gel concentrations, thereby resulting in a blue gel for OPE3, a green gel for OPE5, and a greenish yellow gel for OPE7. The molecule-molecule and molecule-substrate interactions in these OPEs are strongly influenced by the conjugation length of the molecules. Silicon wafer suppresses substrate-molecule interactions whereas a mica surface facilitates such interactions. At lower concentrations, OPE3 formed vesicular assemblies and OPE5 gave entangled fibers, whereas OPE7 resulted in spiral assemblies on a mica surface. At higher concentrations, OPE3 and OPE5 resulted in super-bundles of fibers and flowerlike short-fiber agglomerates when different conditions were applied. The number of polymorphic structures increases on increasing the conjugation length, as seen in the case of OPE7 with n=5, which resulted in a variety of exotic structures, the formation of which could be controlled by varying the substrate, concentration, and humidity.
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Affiliation(s)
- Anesh Gopal
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR, Thiruvanthapuram-695019, India
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Saito N, Shigeno M, Yamaguchi M. Two-Component Fibers/Gels and Vesicles Formed from Hetero-Double-Helices of Pseudoenantiomeric Ethynylhelicene Oligomers with Branched Side Chains. Chemistry 2012; 18:8994-9004. [DOI: 10.1002/chem.201200280] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 04/07/2012] [Indexed: 12/29/2022]
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Wang M, Mohebbi AR, Sun Y, Wudl F. Ribbons, Vesicles, and Baskets: Supramolecular Assembly of a Coil-Plate-Coil Emeraldicene Derivative. Angew Chem Int Ed Engl 2012; 51:6920-4. [DOI: 10.1002/anie.201201796] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 05/15/2012] [Indexed: 11/09/2022]
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Wang M, Mohebbi AR, Sun Y, Wudl F. Ribbons, Vesicles, and Baskets: Supramolecular Assembly of a Coil-Plate-Coil Emeraldicene Derivative. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Blažek V, Mlinarić-Majerski K, Qin W, Basarić N. Photophysical study of the aggregation of naphthyl-, anthryl- and pyrenyl-adamantanebisurea derivatives. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2011.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Xu XD, Zhang J, Chen LJ, Zhao XL, Wang DX, Yang HB. Large-Scale Honeycomb Microstructures Constructed by Platinum-Acetylide Gelators through Supramolecular Self-Assembly. Chemistry 2012; 18:1659-67. [DOI: 10.1002/chem.201102743] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Indexed: 11/09/2022]
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Narayana YSLV, Chandrasekar R. Triple Emission from Organic/Inorganic Hybrid Nanovesicles in a Single Excitation. Chemphyschem 2011; 12:2391-6. [DOI: 10.1002/cphc.201100426] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Indexed: 11/07/2022]
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Sakakibara K, Hill JP, Ariga K. Thin-film-based nanoarchitectures for soft matter: controlled assemblies into two-dimensional worlds. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:1288-308. [PMID: 21506267 DOI: 10.1002/smll.201002350] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Indexed: 05/19/2023]
Abstract
Controlling the organization of molecular building blocks at the nanometer level is of utmost importance, not only from the viewpoint of scientific curiosity, but also for the development of next-generation organic devices with electrical, optical, chemical, or biological functions. Self-assembly offers great potential for the manufacture of nanoarchitectures (nanostructures and nanopatterns) over large areas by using low-energy and inexpensive spontaneous processes. However, self-assembled structures in 3D media, such as solutions or solids, are not easily incorporated into current device-oriented nanotechnology. The scope of this review is therefore to introduce the expanding methodology for the construction of thin-film-based nanoarchitectures on solid surfaces and to try to address a general concept with emphasis on the availability of dynamic interfaces for the creation and manipulation of nanoarchitectures. In this review, the strategies for the construction of nanostructures, the control and manipulation of nanopatterns, and the application of nanoarchitectures are described; the construction strategies are categorized into three classes: i) π-conjugated molecular assembly in two dimensions, ii) bio-directed molecular assembly on surfaces, and iii) recent thin-film preparation technologies.
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Affiliation(s)
- Keita Sakakibara
- World Premier International Research Center for Materials, Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, Japan.
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Qu S, Wang L, Liu X, Li M. Evolution from Lyotropic Liquid Crystal to Helical Fibrous Organogel of an Achiral Fluorescent Twin-Tapered Bi-1,3,4-oxadiazole Derivative. Chemistry 2011; 17:3512-8. [DOI: 10.1002/chem.201003156] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Indexed: 11/06/2022]
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Aparicio F, García F, Fernández G, Matesanz E, Sánchez L. Mirror helices and helicity switch at surfaces based on chiral triangular-shape oligo(phenylene ethynylenes). Chemistry 2011; 17:2769-76. [PMID: 21271616 DOI: 10.1002/chem.201001596] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 08/23/2010] [Indexed: 11/09/2022]
Abstract
The self-assembly of triangular-shaped oligo(phenylene ethynylenes) (OPEs), peripherally decorated with chiral and linear paraffinic chains, is investigated in bulk, onto surfaces and in solution. Whilst the X-ray diffraction data for the chiral studied systems display a broad reflection centered at 2θ ∼20° (λ=Cu(Kα)), the higher crystallinity of OPE 3, endowed with three linear decyl chains, results in a diffractrogram with a number of well-resolved reflections that can be accurately indexed as a columnar packing arranged in 2D oblique cells. Compounds (S)-1 a and (R)-1 b-endowed with (S)- and (R)-3,7-dimethyloctyloxy chains-transfer their chirality to the supramolecular structures formed upon their self-assembly, and give rise to helical nanostructures of opposite handedness. A helicity switch is noticeable for the case of chiral (S)-2 decorated with (S)-2-methylnonyloxy chains which forms right-handed helices despite it possesses the same stereoconfiguration for their stereogenic carbons as (S)-1 a that self-assembles into left-handed helices. The stability and the mechanism of the supramolecular polymerization in solution have been investigated by UV/Vis experiments in methylcyclohexane. These studies demonstrate that the larger the distance between the stereogenic carbon and the aromatic framework is, the more stable the aggregate is. Additionally, the self-assembly mechanism is conditioned by the peripheral substituents: whereas compounds (S)-1 a and (R)-1 b self-assemble in a cooperative manner with a low degree of cooperativity, the aggregation of (S)-2 and 3 is well described by an isodesmic model. Therefore, the interaction between the chiral coil chains conditions the handedness of the helical pitch, the stability of the supramolecular structure and the supramolecular polymerization mechanism of the studied OPEs.
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Affiliation(s)
- Fátima Aparicio
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria s/n, Madrid, Spain
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Yagai S, Nakano Y, Seki S, Asano A, Okubo T, Isoshima T, Karatsu T, Kitamura A, Kikkawa Y. Supramolecularly Engineered Aggregation of a Dipolar Dye: Vesicular and Ribbonlike Architectures. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201006117] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yagai S, Nakano Y, Seki S, Asano A, Okubo T, Isoshima T, Karatsu T, Kitamura A, Kikkawa Y. Supramolecularly Engineered Aggregation of a Dipolar Dye: Vesicular and Ribbonlike Architectures. Angew Chem Int Ed Engl 2010; 49:9990-4. [DOI: 10.1002/anie.201006117] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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van Rijn P, Janeliunas D, Brizard AMA, Stuart MCA, Eelkema R, van Esch JH. Introduction of Curvature in Amphipathic Oligothiophenes for Defined Aggregate Formation. Chemistry 2010; 16:13417-28. [DOI: 10.1002/chem.201001831] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Ozawa H, Kawao M, Nagata T, Uno S, Nakazato K. Fabrication of Microspheres from Phthalimide-Substituted Porphyrin Derivatives. Chem Asian J 2010; 5:2393-9. [DOI: 10.1002/asia.201000413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yan L, Xue Y, Gao G, Lan J, Yang F, Su X, You J. Self-assembly of discrete homochiral, helical, hydrogen-bonded nanocages: from vesicles to microspheres and tubules capable of gelating solvents. Chemistry 2010; 16:2250-7. [PMID: 20066702 DOI: 10.1002/chem.200902750] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The chiral tris-monodentate imidazolinyl ligands 1 a-c exhibit a strong tendency to form the discrete, helical [2+3] nanocages 3 ([1(2).2(3)]) with tartaric acids 2. Circular dichroism (CD) spectra and theoretical calculations reveal that supramolecular handedness of capsulelike architectures is determined only by the chirality of the imidazolinyl ligands rather than tartaric acids. The chirality of imidazolinyl ligands is transferred to the helicity of the complexes through the directed hydrogen bonds between the N3 atom of imidazoline rings and the carboxyl of tartaric acids. These hydrogen-bonded nanocages can spontaneously self-assemble into spherical vesicles, during which the hydrogen bonding that arises from the hydroxyl groups of tartaric acids plays a crucial issue. The vesicles formed by [{(S,S,S)-1 a}(2)(2(L))(3)] (3 a) may further evolve into microspheres that gelate organic solvents after being aged at -20 degrees C for 24 h, and can also be unprecedentedly transformed to tubular assemblies capable of rigidifying the solvents when subjected to ultrasound irradiation.
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Affiliation(s)
- Liwei Yan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, and State Key Laboratory of Biotherapy, West China Medical School, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
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García F, Sánchez L. Dendronized triangular oligo(phenylene ethynylene) amphiphiles: nanofibrillar self-assembly and dye encapsulation. Chemistry 2010; 16:3138-46. [PMID: 20119992 DOI: 10.1002/chem.200902894] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Triangular-shaped oligo(phenylene ethynylene) amphiphiles 1a and 1b decorated in their periphery with two- and four-branched hydrophilic triethyleneglycol dendron wedges, have been synthesized and their self-assembling properties in solution and onto surfaces investigated. The steric demand produced by the dendritic substituents induces a face-to-face rotated pi stacking of the aromatic moieties. Studies on the concentration and temperature dependence confirm this mechanism and provide binding constants of 1.2 x 10(5) and 1.7 x 10(5) M(-1) in acetonitrile for 1a and 1b, respectively. Dynamic and static light scattering measurements complement the study of the self-assembly in solution and demonstrate the formation of rod-like supramolecular structures in aqueous solution. The nanofibers formed in solution can be efficiently transferred onto surfaces. Thus, TEM images reveal the presence of strands of various thickness, with the most common being several micrometers long and with diameters of around 70 nm. Some of these nanofibers present folded edges that are indicative of their ribbon-like nature. Interestingly, compound 1b can also form thick filaments with a rope-like appearance, which points to a chiral arrangement of the fibers. AFM images under highly diluted conditions also reveal long fibers with height profiles that fit well with the molecular dimensions calculated for both amphiphiles. Finally, we have demonstrated the intercalation of the hydrophobic dye Disperse Orange 3 within the filaments and its subsequent release upon increasing the temperature.
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Affiliation(s)
- Fátima García
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria, s/n. 28040 Madrid, Spain
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García F, Fernández G, Sánchez L. Modulated morphology in the self-organization of a rectangular amphiphile. Chemistry 2009; 15:6740-7. [PMID: 19499561 DOI: 10.1002/chem.200900303] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The rectangular oligo(phenylene ethynylene) amphiphile 1 has been synthesized to investigate its self-assembling features in solution and onto surfaces. Concentration-dependent and variable-temperature NMR experiments firstly demonstrate the influence of the solvent in the stabilization of the non-covalent forces involved in the association of 1, namely, pi-pi stacking interactions between the aromatic fragments and van der Waals, hydrogen-bonding and/or solvophobic forces between the triethyleneglycol chains. This subtle balance of non-covalent interactions also conditions the thermodynamics of the self-assembly process and concentration-dependent UV/Vis investigations show a linear correlation between the polarity of the solvent and the K(a) values (K(a) approximately 5.2 x 10(5) M(-1) for CH3CN/H2O mixtures and 4.4 x 10(4) M(-1) for benzene). Moreover, these UV/Vis studies prove the organization of this compound following the indefinite self-association model. Microscopy techniques reveal that the morphology and dimensionality of the assemblies formed from 1 can be finely modulated. Although polar solvents yield hollow vesicles or toroidal 3D objects, depending upon concentration, the utilization of non-polar benzene results in the formation of unimolecular wires that can grow to form networks upon increasing concentration. These findings support the direct relationship existing between the self-assembling features of this amphiphile in solution and onto surfaces.
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Affiliation(s)
- Fátima García
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Ciudad Universitaria s/n. 28040 Madrid, Spain
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Hisaki I, Shigemitsu H, Sakamoto Y, Hasegawa Y, Okajima Y, Nakano K, Tohnai N, Miyata M. Octadehydrodibenzo[12]annulene-Based Organogels: Two Methyl Ester Groups Prevent Crystallization and Promote Gelation. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900501] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hisaki I, Shigemitsu H, Sakamoto Y, Hasegawa Y, Okajima Y, Nakano K, Tohnai N, Miyata M. Octadehydrodibenzo[12]annulene-Based Organogels: Two Methyl Ester Groups Prevent Crystallization and Promote Gelation. Angew Chem Int Ed Engl 2009; 48:5465-9. [DOI: 10.1002/anie.200900501] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Iwaura R, Ohnishi-Kameyama M, Iizawa T. Construction of helical J-aggregates self-assembled from a thymidylic acid appended anthracene dye and DNA as a template. Chemistry 2009; 15:3729-35. [PMID: 19206120 DOI: 10.1002/chem.200802537] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The thymidylic acid appended anthracene dye 2,6-bis[5-(3'-thymidylic acid)pentyloxy]anthracene (1) was synthesized, and the self-assembly of 1 and the binary self-assembly of 1 with a complementary single-stranded 20-meric oligodeoxyadenylic acid (dA(20)) were performed in 0.1 x TE buffer solution (i.e., 1.0 x 10(-3) M Tris-HCl, 1.0 x 10(-4) M ethylenediaminetriacetic acid (EDTA)). The characteristic J-band, small Stokes shift (6 nm), Cotton effect, and helical nanofibers 5.1 nm in diameter are observed in UV/Vis, fluorescence, and circular dichroism (CD) spectroscopies and atomic force microscopy (AFM) measurements for the binary self-assembly of 1 and dA(20) in aqueous solution. These observations revealed that the helical J-aggregates, in which the short-axis transition dipoles of the anthracene moieties are aligned in a head-to-tail fashion, are formed from the binary self-assembly of 1 and dA(20). The UV/Vis absorption and CD band of the anthracene L(a) region were found to be strongly dependent on temperature and showed cooperative changes for the binary self-assembly of 1 and dA(20). The self-assembly of the single-component 1 produced right- and left-handed helical nanofibers with diameters ranging from 4.0 to 10 nm. In contrast, for the binary self-assembly, the UV/Vis and fluorescence spectra showed no J-band and the Stokes shift was at approximately 107 nm for the single-component 1 in aqueous solution. In addition, the binary self-assembly of 1 and noncomplementary single-stranded 20-meric oligothymidylic acid (dT(20)) showed a small J-band and the J-band disappeared at 50 degrees C upon heating. On the basis of these observations, we concluded that thymine-adenine base-pair formation induced supramolecular helical J-aggregates in the binary self-assembly of 1 and dA(20) in aqueous solutions.
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Affiliation(s)
- Rika Iwaura
- National Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki, 305-8642, Japan.
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Control of H- and J-Type π Stacking by Peripheral Alkyl Chains and Self-Sorting Phenomena in Perylene Bisimide Homo- and Heteroaggregates. Chemistry 2008; 14:11343-57. [DOI: 10.1002/chem.200801454] [Citation(s) in RCA: 383] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Chithra P, Varghese R, Divya K, Ajayaghosh A. Solvent-Induced Aggregation and Cation-Controlled Self-Assembly of Tripodal Squaraine Dyes: Optical, Chiroptical and Morphological Properties. Chem Asian J 2008; 3:1365-73. [DOI: 10.1002/asia.200800133] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Yagai S, Mahesh S, Kikkawa Y, Unoike K, Karatsu T, Kitamura A, Ajayaghosh A. Toroidal Nanoobjects from Rosette Assemblies of Melamine-Linked Oligo(p-phenyleneethynylene)s and Cyanurates. Angew Chem Int Ed Engl 2008; 47:4691-4. [DOI: 10.1002/anie.200800417] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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