1
|
Dünnebacke T, Niemeyer N, Baumert S, Hochstädt S, Borsdorf L, Hansen MR, Neugebauer J, Fernández G. Molecular and supramolecular adaptation by coupled stimuli. Nat Commun 2024; 15:5695. [PMID: 38972878 PMCID: PMC11228013 DOI: 10.1038/s41467-024-50029-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 06/26/2024] [Indexed: 07/09/2024] Open
Abstract
Adaptation transcends scale in both natural and artificial systems, but delineating the causative factors of this phenomenon requires urgent clarification. Herein, we unravel the molecular requirements for adaptation and establish a link to rationalize adaptive behavior on a self-assembled level. These concepts are established by analyzing a model compound exhibiting both light- and pH-responsive units, which enable the combined or independent application of different stimuli. On a molecular level, adaptation arises from coupled stimuli, as the final outcome of the system depends on their sequence of application. However, in a self-assembled state, a single stimulus suffices to induce adaptation as a result of collective molecular behavior and the reversibility of non-covalent interactions. Our findings go beyond state-of-the-art (multi)stimuli-responsive systems and allow us to draw up design guidelines for adaptive behavior both at the molecular and supramolecular levels, which are fundamental criteria for the realization of intelligent matter.
Collapse
Affiliation(s)
- Torsten Dünnebacke
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
| | - Niklas Niemeyer
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
- Universität Münster, Center for Multiscale Theory and Computation, Corrensstraße 36, 48149, Münster, Germany
| | - Sebastian Baumert
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
| | - Sebastian Hochstädt
- Universität Münster, Institut für Physikalische Chemie, Corrensstraße 28/30, 48149, Münster, Germany
| | - Lorenz Borsdorf
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
| | - Michael Ryan Hansen
- Universität Münster, Institut für Physikalische Chemie, Corrensstraße 28/30, 48149, Münster, Germany.
| | - Johannes Neugebauer
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany.
- Universität Münster, Center for Multiscale Theory and Computation, Corrensstraße 36, 48149, Münster, Germany.
| | - Gustavo Fernández
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany.
| |
Collapse
|
2
|
Hao X, Liu Z, Qin J, Jin X, Liu LZ, Zhai H, Yang W, Yan ZC, Feng Y. Quinoline-cored Poly(Aryl Ether) Dendritic Organogels with Multiple Stimuli-Responsive and Adsorptive Properties. Chem Asian J 2021; 17:e202101135. [PMID: 34729930 DOI: 10.1002/asia.202101135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/02/2021] [Indexed: 11/06/2022]
Abstract
Functional supramolecular gel materials have potential applications in sensors, optical switches, artificial antennae, drug delivery and so on. In this paper, quinoline-cored poly(aryl ether) dendritic organogelators were designed, synthesized and fully characterized. The gelation behaviour of the dendritic organogelator was tested in organic solvents, mixed solvents and ionic liquids. The dendron Q-G1 was found to be an efficient and versatile organogelator toward various apolar and polar organic solvents with the critical gelation concentrations (CGCs) approaching 1.2×10-2 mol/L, indicating one dendritic organogelator could immobilize 1.2×103 solvent molecules in the organogel network. Interestingly, these dendrons exhibited excellent gel formation in ionic liquids. Notably, these dendritic organogels were found to display multiple stimuli-responsive properties toward external stimuli including heat, ultrasound and shear stress, with a reversible sol-gel phase transition. In addition, the dendritic organogel could effectively adsorb heavy metals and organic dyes. The removal rate of Pb2+ was up to 20% and the adsorption rate for Rhodamine B was as high as 89%.
Collapse
Affiliation(s)
- Xiaoyu Hao
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Zhixiong Liu
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Jun Qin
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Xinyi Jin
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Li-Zhen Liu
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Hong Zhai
- School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China
| | - Weifa Yang
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, P. R. China
| | - Zhi-Chao Yan
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, P. R. China
| | - Yu Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), University of Chinese Academy of Sciences, Beijing, 100190, P. R. China
| |
Collapse
|
3
|
Ge J, Guo J, Yu X, Li Y, Ma Z. Structural Tunability on Naphthalimide-Based Dendrimer Gelators via Glaser Coupling Interaction with Tailored Gelation Solvent Polarity and Stimuli-Responsive Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2677-2682. [PMID: 33599502 DOI: 10.1021/acs.langmuir.0c03316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To date, most of the low-molecular-weight gels are found serendipitously, and modification on known gelator structures via organic synthesis is an efficient methodology to prepare gel series. However, a simple, direct, and rational modification method for a known gelator is still a challenge. Herein, we employ Glaser coupling reaction to synthesize a novel dendrimer gelator BisDEC with the (ALS2)2 structure, starting from terminal alkyne-based gelator DEC with the ALS2 structure. This structural change results in gels with distinct gelation solvents, mechanical properties, and stimuli-responsive abilities. The gelation abilities of DEC and BisDEC in nonpolar and polar solvents, respectively, have been examined and discussed by several experiments and Hansen constants. It is also shown that the BisDEC gel system shows intriguing self-healing, self-supporting, and grinding chromism properties.
Collapse
Affiliation(s)
- Junqi Ge
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China
- College of Science and Hebei Research Center of Pharmaceutical and Chemical Engineering, Hebei University of Science and Technology, Shijiazhuang 050080, China
| | - Jiangbo Guo
- College of Science and Hebei Research Center of Pharmaceutical and Chemical Engineering, Hebei University of Science and Technology, Shijiazhuang 050080, China
| | - Xudong Yu
- College of Science and Hebei Research Center of Pharmaceutical and Chemical Engineering, Hebei University of Science and Technology, Shijiazhuang 050080, China
| | - Yajuan Li
- College of Science and Hebei Research Center of Pharmaceutical and Chemical Engineering, Hebei University of Science and Technology, Shijiazhuang 050080, China
| | - Zichuan Ma
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China
| |
Collapse
|
4
|
Huang CH, Jardel D, Lautrette G, Pianet I, Kuhn A, Bassani DM. Supramolecular Ladder Assemblies as a Model for Probing Electronic Interactions between Multiple Stacked π-Conjugated Systems. Chemphyschem 2021; 22:178-183. [PMID: 33205890 DOI: 10.1002/cphc.202000857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/17/2020] [Indexed: 11/08/2022]
Abstract
A series of mono-, di-, and tri-topic receptors in which H-bonding sites, complementary to those of barbituric acid (BA), are fused is used to induce the supramolecular assembly of n×m ladders containing 1, 2, or 3 triphenylenevinylene units appended with BA. The topological constraint enforced by the architectures induces through-space interactions between the electroactive moieties that are reflected in the electronic absorption and emission spectrum. The n=2, m=2 or m=3 architectures undergo two single electron oxidation events, indicative of the formation of the corresponding mono- and di-radical cation species with comproportionation constants of 340 and 70, respectively. Comparison of the electrochemical potentials suggests that the charges are delocalized over the electroactive units in the assembly.
Collapse
Affiliation(s)
- Chi-Huao Huang
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, 351 cours de la Libération, 33405, Talence, France
| | - Damien Jardel
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, 351 cours de la Libération, 33405, Talence, France
| | - Guillaume Lautrette
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, 351 cours de la Libération, 33405, Talence, France
| | - Isabelle Pianet
- Univ. Bordeaux, CNRS, IRAMAT-CRP2A UMR 5060 Maison de l'archéologie, Espl. des Antilles, 33607, Pessac, France
| | - Alexander Kuhn
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, 16 Avenue Pey-Berland, 33607, Pessac, France
| | - Dario M Bassani
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, 351 cours de la Libération, 33405, Talence, France
| |
Collapse
|
5
|
Katla J, Shaik A, Dahiwadkar R, Thiruvenkatam V, Kanvah S. One- and Two-Component Organogels Containing Cyanostilbene without any Auxiliary Substituents. Chempluschem 2020; 84:1789-1795. [PMID: 31943862 DOI: 10.1002/cplu.201900564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 09/27/2019] [Indexed: 12/11/2022]
Abstract
Pyridyl acrylonitrile without traditional auxiliary groups form stable organogels in ethanol. The addition of a second non-gelating cyanostilbene component results in a more stable two-component gel. Single crystal X-ray data reveal the influence of C-H⋅ ⋅ ⋅N, C-H⋅ ⋅ ⋅π, and π-π interactions in the formation of organogels. The morphology of the xerogels was studied by using SEM, which showed the self-assembly of molecules to fibers and sheet-like structures, and phase differences upon the gel formation and the structural phase characterization was measured using powder XRD. Exposure of the organogels to acidic (TFA) vapors results in distinct color changes and loss of gelation properties, thus highlighting the potential of these gels in sensing. The results represent a rare example of two-component organogels using two different cyanostilbene units and show that functional two-component organogels can be formed by utilizing the synergistic effects of the individual components.
Collapse
Affiliation(s)
- Jagadish Katla
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj Gandhinagar, 382355, India
| | - Althaf Shaik
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj Gandhinagar, 382355, India
| | - Rahul Dahiwadkar
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj Gandhinagar, 382355, India
| | - Vijay Thiruvenkatam
- Department of Biological Engineering and Physics, Indian Institute of Technology Gandhinagar, Palaj Gandhinagar, 382355, India
| | - Sriram Kanvah
- Department of Chemistry, Indian Institute of Technology Gandhinagar, Palaj Gandhinagar, 382355, India
| |
Collapse
|
6
|
Ghosh D, Mulvee MT, Damodaran KK. Tuning Gel State Properties of Supramolecular Gels by Functional Group Modification. Molecules 2019; 24:E3472. [PMID: 31557821 PMCID: PMC6804314 DOI: 10.3390/molecules24193472] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/22/2019] [Accepted: 09/24/2019] [Indexed: 12/02/2022] Open
Abstract
The factors affecting the self-assembly process in low molecular weight gelators (LMWGs) were investigated by tuning the gelation properties of a well-known gelator N-(4-pyridyl)isonicotinamide (4PINA). The N-H∙∙∙N interactions responsible for gel formation in 4PINA were disrupted by altering the functional groups of 4PINA, which was achieved by modifying pyridyl moieties of the gelator to pyridyl N-oxides. We synthesized two mono-N-oxides (INO and PNO) and a di-N-oxide (diNO) and the gelation studies revealed selective gelation of diNO in water, but the two mono-N-oxides formed crystals. The mechanical strength and thermal stabilities of the gelators were evaluated by rheology and transition temperature (Tgel) experiments, respectively, and the analysis of the gel strength indicated that diNO formed weak gels compared to 4PINA. The SEM image of diNO xerogels showed fibrous microcrystalline networks compared to the efficient fibrous morphology in 4PINA. Single-crystal X-ray analysis of diNO gelator revealed that a hydrogen-bonded dimer interacts with adjacent dimers via C-H∙∙∙O interactions. The non-gelator with similar dimers interacted via C-H∙∙∙N interaction, which indicates the importance of specific non-bonding interactions in the formation of the gel network. The solvated forms of mono-N-oxides support the fact that these compounds prefer crystalline state rather than gelation due to the increased hydrophilic interactions. The reduced gelation ability (minimum gel concentration (MGC)) and thermal strength of diNO may be attributed to the weak intermolecular C-H∙∙∙O interaction compared to the strong and unidirectional N-H∙∙∙N interactions in 4PINA.
Collapse
Affiliation(s)
- Dipankar Ghosh
- Department of Chemistry, Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavík, Iceland.
| | - Matthew T Mulvee
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.
| | - Krishna K Damodaran
- Department of Chemistry, Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavík, Iceland.
| |
Collapse
|
7
|
Nair VS, Vedhanarayanan B, Ajayaghosh A. Controlling the Supramolecular Polymerization of Donor‐Acceptor π‐Systems through Hydrogen Bond Intervention. Chempluschem 2019; 84:1405-1412. [DOI: 10.1002/cplu.201900276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/20/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Vishnu Sukumaran Nair
- Photosciences and Photonics Section Chemical Sciences and Technology DivisionCSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) Thiruvananthapuram- 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Balaraman Vedhanarayanan
- Photosciences and Photonics Section Chemical Sciences and Technology DivisionCSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) Thiruvananthapuram- 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section Chemical Sciences and Technology DivisionCSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) Thiruvananthapuram- 695019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| |
Collapse
|
8
|
Cao X, Li Y, Yu Y, Fu S, Gao A, Chang X. Multifunctional supramolecular self-assembly system for colorimetric detection of Hg 2+, Fe 3+, Cu 2+ and continuous sensing of volatile acids and organic amine gases. NANOSCALE 2019; 11:10911-10920. [PMID: 31139798 DOI: 10.1039/c9nr01433k] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel multifunctional gelator (1) based on an azobenzene derivative was designed and characterized. This compound could gelate some solvents including hexane, petroleum ether, DMSO, acetonitrile and ethanol through a heating-cooling procedure. The self-assembly process in different solvents was studied by means of UV-vis absorption and Fourier transform infrared (FTIR) spectra, field emission scanning electron microscopy (FESEM), rheological measurements, X-ray powder diffraction and water contact angle experiments. Interestingly, compound 1 had a high-contrast colorimetric detection ability towards Hg2+, Cu2+, Fe3+ and volatile acids and further organic amine gases in solution through its color change. At the same time, organogel 1 in acetonitrile also exhibited detection performance through a color or gel state change. In the response process, the self-assembly structures were changed from a nanofiber into a microsphere under induction by analytes. More significantly, film 1 could continuously detect volatile acids and organic amine gases. The number of cycles of film 1 for the detection of volatile acids and organic amine gases was at least seven times. The limit of detection (LOD) of film 1 towards TFA was calculated to be 0.0848 ppb. The sensing mechanisms were studied using 1HNMR, FESEM, UV-vis absorption spectra and HRMS. The intramolecular cyclization occurred on molecule 1 and a H2S molecule was lost during the detection process of Hg2+. It was proposed that the -N[double bond, length as m-dash]N- bonding could be coordinated by Fe3+ and Cu2+ and this further induced the absorption spectra and color change. For a volatile acid, it was possible that the volatile acid was combined with the N,N-dimethyl amine group of molecule 1. This research opens up a novel pathway to the fabrication of supramolecular self-assembly gels to detect polymetallic ions and trace volatile acids in the environment.
Collapse
Affiliation(s)
- Xinhua Cao
- College of Chemistry and Chemical Engineering, Henan Province Key laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China.
| | | | | | | | | | | |
Collapse
|
9
|
Kartha KK, Allampally NK, Yagai S, Albuquerque RQ, Fernández G. Mechanistic Insights into the Self-Assembly of an Acid-Sensitive Photoresponsive Supramolecular Polymer. Chemistry 2019; 25:9230-9236. [PMID: 30937962 PMCID: PMC7187368 DOI: 10.1002/chem.201900775] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Indexed: 12/19/2022]
Abstract
The supramolecular polymerization of an acid‐sensitive pyridyl‐based ligand (L1) bearing a photoresponsive azobenzene moiety was elucidated by mechanistic studies. Addition of trifluoroacetic acid (TFA) led to the transformation of the antiparallel H‐bonded fibers of L1 in methylcyclohexane into superhelical braid‐like fibers stabilized by H‐bonding of parallel‐stacked monomer units. Interestingly, L1 dimers held together by unconventional pyridine–TFA N⋅⋅⋅H⋅⋅⋅O bridges represent the main structural elements of the assembly. UV‐light irradiation caused a strain‐driven disassembly and subsequent aggregate reconstruction, which ultimately led to short fibers. The results allowed to understand the mechanism of mutual influence of acid and light stimuli on supramolecular polymerization processes, thus opening up new possibilities to design advanced stimuli‐triggered supramolecular systems.
Collapse
Affiliation(s)
- Kalathil K Kartha
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | | | - Shiki Yagai
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33-Yayoi-cho, Inage-Ku, Chiba, 263-8522, Japan
| | - Rodrigo Q Albuquerque
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Gustavo Fernández
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| |
Collapse
|
10
|
Tatikonda R, Bulatov E, Özdemir Z, Haukka M. Infinite coordination polymer networks: metallogelation of aminopyridine conjugates and in situ silver nanoparticle formation. SOFT MATTER 2019; 15:442-451. [PMID: 30570631 DOI: 10.1039/c8sm02006j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein we report silver(i) directed infinite coordination polymer network (ICPN) induced self-assembly of low molecular weight organic ligands leading to metallogelation. Structurally simple ligands are derived from 3-aminopyridine and 4-aminopyridine conjugates which are composed of either pyridine or 2,2'-bipyridine cores. The cation specific gelation was found to be independent of the counter anion, leading to highly entangled fibrillar networks facilitating the immobilization of solvent molecules. Rheological studies revealed that the elastic storage modulus (G') of a given gelator molecule is counter anion dependent. The metallogels derived from ligands containing a bipyridine core displayed higher G' values than those with a pyridine core. Furthermore, using single crystal X-ray diffraction studies and 1H-15N two-dimensional (2D) correlation NMR spectroscopy, we show that the tetracoordination of silver ions enables simultaneous coordination polymerization and metallosupramolecular cross-linking. The resulting metallogels show spontaneous, in situ nanoparticle (d < 2-3 nm) formation without any additional reducing agents. The silver nanoparticle formation was followed using spectroscopic studies, and the self-assembled fibrillar networks were imaged using transmission electron microscopy (TEM) imaging.
Collapse
Affiliation(s)
| | - Evgeny Bulatov
- Department of Chemistry, University of Jyväskylä, P. O. Box 35, FI-40014 Jyväskylä, Finland.
| | - Zülal Özdemir
- Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Technicka 5, 16628 Prague 6, Czech Republic and Institute of Experimental Botany AS CR, Isotope Laboratory, Videnska 1083, 14220 Prague 4, Czech Republic
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä, P. O. Box 35, FI-40014 Jyväskylä, Finland.
| |
Collapse
|
11
|
Chakraborty P, Dastidar P. Exploring Orthogonal Hydrogen Bonding towards Designing Organic-Salt-Based Supramolecular Gelators: Synthesis, Structures, and Anticancer Properties. Chem Asian J 2018; 13:1366-1378. [PMID: 29578316 DOI: 10.1002/asia.201800317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 12/12/2022]
Abstract
A series of primary ammonium monocarboxylate (PAM) salts derived from β-alanine derivatives of pyrene and naphthalene acetic acid, along with the parent acids, were explored to probe the plausible role of orthogonal hydrogen bonding resulting from amide⋅⋅⋅amide and PAM synthons on gelation. Single-crystal X-ray diffraction (SXRD) studies were performed on two parent acids and five PAM salts in the series. The data revealed that orthogonal hydrogen bonding played an important role in gelation. Structure-property correlation based on SXRD and powder X-ray diffraction data also supported the working hypothesis upon which these gelators were designed. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and cell migration assay on a highly aggressive human breast cancer cell line, MDA-MB-231, revealed that one of the PAM salts in the series, namely, PAA.B2, displayed anticancer properties, and internalization of the gelator salt in the same cell line was confirmed by cell imaging.
Collapse
Affiliation(s)
- Poulami Chakraborty
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata-, 700032, West Bengal, India
| | - Parthasarathi Dastidar
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata-, 700032, West Bengal, India
| |
Collapse
|
12
|
Wang H, Han Y, Yuan W, Wu M, Chen Y. Self-Assembly of Azobenzene Derivatives into Organogels and Photoresponsive Liquid Crystals. Chem Asian J 2018; 13:1173-1179. [PMID: 29453904 DOI: 10.1002/asia.201800019] [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: 01/05/2018] [Indexed: 12/17/2022]
Abstract
A new class of coil-rod-coil molecules with an azobenzene core was synthesized. They were found to form robust organogels in several organic solvents. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), FTIR spectroscopy, UV/Vis absorption spectroscopy, 1 H NMR spectroscopy, and X-ray diffraction (XRD) revealed that in these organogels, the molecules self-assembled into a nanofiber network with an H-type aggregation mode under the joint effect of π-π stacking, intermolecular hydrogen bonding, and van der Waals forces. Interestingly, the incorporation of the azobenzene mesogene into the rigid core led to photoisomerizable liquid crystal materials, which exhibited quick responsiveness to light and temperature, along with the trans-cis transition stimulated by UV light and heating.
Collapse
Affiliation(s)
- Hongyan Wang
- Department of Chemistry, School of Sciences, and School of Materials Science and Engineering, Tianjin University, Tianjin, 300354, P. R. China
| | - Yi Han
- Department of Chemistry, School of Sciences, and School of Materials Science and Engineering, Tianjin University, Tianjin, 300354, P. R. China
| | - Wei Yuan
- Department of Chemistry, School of Sciences, and School of Materials Science and Engineering, Tianjin University, Tianjin, 300354, P. R. China
| | - Mengjiao Wu
- Department of Chemistry, School of Sciences, and School of Materials Science and Engineering, Tianjin University, Tianjin, 300354, P. R. China
| | - Yulan Chen
- Department of Chemistry, School of Sciences, and School of Materials Science and Engineering, Tianjin University, Tianjin, 300354, P. R. China
| |
Collapse
|
13
|
Sandeep A, Praveen VK, Shankar Rao DS, Krishna Prasad S, Ajayaghosh A. Transforming a C 3-Symmetrical Liquid Crystal to a π-Gelator by Alkoxy Chain Variation. ACS OMEGA 2018; 3:4392-4399. [PMID: 31458665 PMCID: PMC6641626 DOI: 10.1021/acsomega.8b00496] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/13/2018] [Indexed: 05/27/2023]
Abstract
Rational understanding of the structural features involving different noncovalent interactions is necessary to design a liquid crystal (LC) or an organogelator. Herein, we report the effect of the number and positions of alkoxy chains on the self-assembly induced physical properties of a few π-conjugated molecules. For this purpose, we designed and synthesized three C 3-symmetrical molecules based on oligo(p-phenylenevinylene), C 3 OPV1-3. The self-assembly properties of these molecules are studied in the solid and solution states. All of the three molecules follow the isodesmic self-assembly pathway. Upon cooling from isotropic melt, C 3 OPV1 having nine alkoxy chains (-OC12H25) formed a columnar phase with two-dimensional rectangular lattice and retained the LC phase even at room temperature. Interestingly, when one of the -OC12H25 groups from each of the end benzene rings is knocked out, the resultant molecule, C 3 OPV2 lost the LC property, however, transformed as a gelator in toluene and n-decane. Surprisingly, when the -OC12H25 group from the middle position is removed, the resultant molecule C 3 OPV3 failed to form either the LC or the gel phases.
Collapse
Affiliation(s)
- Anjamkudy Sandeep
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science
and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Vakayil K. Praveen
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science
and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram 695019, India
| | - D. S. Shankar Rao
- Centre
for Nano and Soft Matter Sciences (CeNS), Jalahalli, Bengaluru 560013, India
| | - S. Krishna Prasad
- Centre
for Nano and Soft Matter Sciences (CeNS), Jalahalli, Bengaluru 560013, India
| | - Ayyappanpillai Ajayaghosh
- Photosciences
and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science
and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram 695019, India
| |
Collapse
|
14
|
Raghava SV, Srivastava BK, Ramshad K, Antharjanam S, Varghese B, Muraleedharan KM. From helical supramolecular arrays to gel-forming networks: lattice restructuring and aggregation control in peptide-based sulfamides to integrate new functional attributes. SOFT MATTER 2018; 14:2357-2364. [PMID: 29498388 DOI: 10.1039/c7sm02495a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
While supramolecular organisation is central to both crystallization and gelation, the latter is more complex considering its dynamic nature and multifactorial dependence. This makes the rational design of gelators an extremely difficult task. In this report, the assembly preference of a group of peptide-based sulfamides was modulated by making them part of an acid-amine two-component system to drive the tendency from crystallization to gelation. Here, the peptide core directed the assembly while the long-chain amines, introduced through salt-bridges, promoted layering and anisotropic development of primary aggregates. This proved to be very successful, leading to gelation of a number of solvents. Apart from this, it was possible to fine-tune their aggregation using an amphiphilic polymer like F-127 as an additive to get honey-comb-like 3D molecular architectures. These gels also proved to be excellent matrices for entrapping silver nanoparticles with superior emissive properties.
Collapse
Affiliation(s)
- Saripalli V Raghava
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | - Bhartendu K Srivastava
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | - Kalluruttimmal Ramshad
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | | | | | - Kannoth M Muraleedharan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| |
Collapse
|
15
|
Maity S, Shyamal M, Das D, Maity A, Dey S, Misra A. Proton triggered emission and selective sensing of 2,4,6-trinitrophenol using a fluorescent hydrosol of 2-phenylquinoline. NEW J CHEM 2018. [DOI: 10.1039/c7nj03861e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Compound 2-phenylquinoline (PhQ) displayed novel aggregation induced emission enhancement (AIEE) characteristics in its aggregate/solid state. It allows reversible fluorescence switching in acidic and basic media and ‘turn off’ fluorescence sensor for TNP.
Collapse
Affiliation(s)
- Samir Maity
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Milan Shyamal
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Debasish Das
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Ashim Maity
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Sudipto Dey
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| | - Ajay Misra
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721 102
- India
| |
Collapse
|
16
|
Ghosh D, Ferfolja K, Drabavičius Ž, Steed JW, Damodaran KK. Crystal habit modification of Cu(ii) isonicotinate–N-oxide complexes using gel phase crystallisation. NEW J CHEM 2018. [DOI: 10.1039/c8nj05036h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report the crystallisation of three forms of the copper(ii) isonicotinate–N-oxide complex and their phase interconversion via solvent-mediated crystal-to-crystal transformation and the selective crystallisation of one form via gel phase crystallisation.
Collapse
Affiliation(s)
- Dipankar Ghosh
- Department of Chemistry
- Science Institute
- University of Iceland
- 107 Reykjavík
- Iceland
| | - Katja Ferfolja
- Department of Chemistry
- Science Institute
- University of Iceland
- 107 Reykjavík
- Iceland
| | | | | | - Krishna K. Damodaran
- Department of Chemistry
- Science Institute
- University of Iceland
- 107 Reykjavík
- Iceland
| |
Collapse
|
17
|
Yoshihara D, Noguchi T, Roy B, Sakamoto J, Yamamoto T, Shinkai S. Design of a Hypersensitive pH-Sensory System Created by a Combination of Charge Neutralization and Aggregation-Induced Emission (AIE). Chemistry 2017; 23:17663-17666. [DOI: 10.1002/chem.201703560] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Daisuke Yoshihara
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Takao Noguchi
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Bappaditya Roy
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Junji Sakamoto
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Seiji Shinkai
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| |
Collapse
|
18
|
Zhang L, Li S, Squillaci MA, Zhong X, Yao Y, Orgiu E, Samorì P. Supramolecular Self-Assembly in a Sub-micrometer Electrodic Cavity: Fabrication of Heat-Reversible π-Gel Memristor. J Am Chem Soc 2017; 139:14406-14411. [DOI: 10.1021/jacs.7b04347] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lei Zhang
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Songlin Li
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Marco A. Squillaci
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Xiaolan Zhong
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Yifan Yao
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Emanuele Orgiu
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Paolo Samorì
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| |
Collapse
|
19
|
Pan H, Duan J, Zhai G, Jin P, Zhao X, Jiang L, Xiao J. Synthesis, Optoelectronic and Self-Assembly Properties of Diazadioxaacene Derivatives. Chem Asian J 2017. [PMID: 28632320 DOI: 10.1002/asia.201700700] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two novel diazadioxaacene derivatives (ADOP and ADOQ) have been successfully synthesized and characterized. Their single crystal analyses disclose that molecule ADOP forms a twisted topology configuration, whereas ADOQ adopts reclining-chair architecture. Both of them emit strong blue fluorescence in organic solvents. Moreover, they can self-assemble to form regular nanobelts and nanowires, respectively, via a simple surfactant-assisted method.
Collapse
Affiliation(s)
- Huahang Pan
- College of Chemistry and Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
| | - Jingdan Duan
- College of Chemistry and Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
| | - Guixia Zhai
- College of Chemistry and Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
| | - Pengcheng Jin
- College of Chemistry and Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
| | - Xiaohui Zhao
- College of Physics Science and Technology, Hebei University, Baoding, 071002, P. R. China
| | - Li Jiang
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Beijing, 100190, P. R. China
| | - Jinchong Xiao
- College of Chemistry and Environmental Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
| |
Collapse
|
20
|
Cherumukkil S, Ghosh S, Praveen VK, Ajayaghosh A. An unprecedented amplification of near-infrared emission in a Bodipy derived π-system by stress or gelation. Chem Sci 2017; 8:5644-5649. [PMID: 28989602 PMCID: PMC5621002 DOI: 10.1039/c7sc01696d] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 06/08/2017] [Indexed: 12/22/2022] Open
Abstract
A meso-substituted Bodipy derived π-gelator exhibits amplified near-infrared (NIR) emission upon shearing of its film from n-decane or drying of its gel from DMSO.
We report an unprecedented strategy to generate and amplify near-infrared (NIR) emission in an organic chromophore by mechanical stress or gelation pathways. A greenish-yellow emitting film of π-extended Bodipy-1, obtained from n-decane, became orange-red upon mechanical shearing, with a 15-fold enhancement in NIR emission at 738 nm. Alternatively, a DMSO gel of Bodipy-1 exhibited a 7-fold enhancement in NIR emission at 748 nm with a change in emission color from yellow to orange-red upon drying. The reason for the amplified NIR emission in both cases is established from the difference in chromophore packing, by single crystal analysis of a model compound (Bodipy-2), which also exhibited a near identical emission spectrum with red to NIR emission (742 nm). Comparison of the emission features and WAXS and FT-IR data of the sheared n-decane film and the DMSO xerogel with the single crystal data supports a head-to-tail slipped arrangement driven by the N–H···F–B bonding in the sheared or xerogel states, which facilitates strong exciton coupling and the resultant NIR emission.
Collapse
Affiliation(s)
- Sandeep Cherumukkil
- Photosciences and Photonics Section , Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram-695019 , India . .,Academy of Scientific and Innovative Research (AcSIR) , CSIR-NIIST Campus , Thiruvananthapuram-695019 , India
| | - Samrat Ghosh
- Photosciences and Photonics Section , Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram-695019 , India . .,Academy of Scientific and Innovative Research (AcSIR) , CSIR-NIIST Campus , Thiruvananthapuram-695019 , India
| | - Vakayil K Praveen
- Photosciences and Photonics Section , Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram-695019 , India . .,Academy of Scientific and Innovative Research (AcSIR) , CSIR-NIIST Campus , Thiruvananthapuram-695019 , India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section , Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Thiruvananthapuram-695019 , India . .,Academy of Scientific and Innovative Research (AcSIR) , CSIR-NIIST Campus , Thiruvananthapuram-695019 , India
| |
Collapse
|
21
|
Laishram R, Maitra U. A Stimuli-Responsive Metallohydrogel Exhibiting Cyclohexane-Like Hydrophobicity. Chem Asian J 2017; 12:1267-1271. [DOI: 10.1002/asia.201700289] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 04/04/2017] [Indexed: 01/31/2023]
Affiliation(s)
- Raju Laishram
- Department of Organic Chemistry; Indian Institute of Science; Bangalore- 12 India
| | - Uday Maitra
- Department of Organic Chemistry; Indian Institute of Science; Bangalore- 12 India
| |
Collapse
|
22
|
Shi H, Liu Y, Zeng Q, Yang Y, Wang C, Lu X. Interfacial assembly structures and nanotribological properties of saccharic acids. Phys Chem Chem Phys 2017; 19:1236-1243. [DOI: 10.1039/c6cp06759j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The larger friction of the successfully constructed assembly of saccharic acid indicates the higher potential energy barrier at the interface.
Collapse
Affiliation(s)
- Hongyu Shi
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing 100084
- China
| | - Yuhong Liu
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing 100084
- China
| | - Qingdao Zeng
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Yanlian Yang
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Chen Wang
- National Center for Nanoscience and Technology
- Beijing 100190
- China
| | - Xinchun Lu
- State Key Laboratory of Tribology
- Tsinghua University
- Beijing 100084
- China
| |
Collapse
|
23
|
Sun Y, Wang YX, Wu M, Yuan W, Chen Y. p-Quaterphenylene as an Aggregation-Induced Emission Fluorogen in Supramolecular Organogels and Fluorescent Sensors. Chem Asian J 2016; 12:52-59. [DOI: 10.1002/asia.201601388] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Yue Sun
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; Tianjin University; Tianjin 300354 P. R. China
| | - Yi-Xuan Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; Tianjin University; Tianjin 300354 P. R. China
| | - Mengjiao Wu
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; Tianjin University; Tianjin 300354 P. R. China
| | - Wei Yuan
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; Tianjin University; Tianjin 300354 P. R. China
| | - Yulan Chen
- Tianjin Key Laboratory of Molecular Optoelectronic Science; Department of Chemistry; Tianjin University; Tianjin 300354 P. R. China
| |
Collapse
|
24
|
Mazumdar P, Maity S, Shyamal M, Das D, Sahoo GP, Misra A. Proton triggered emission and selective sensing of picric acid by the fluorescent aggregates of 6,7-dimethyl-2,3-bis-(2-pyridyl)-quinoxaline. Phys Chem Chem Phys 2016; 18:7055-67. [PMID: 26608816 DOI: 10.1039/c5cp05827a] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A heteroatom containing organic fluorophore 6,7-dimethyl-2,3-bis-(2-pyridyl)-quinoxaline (BPQ) is weakly emissive in solution but its emission properties are highly enhanced in the aggregated state due to the restriction of intramolecular rotation (RIR) and large amplitude vibrational modes, demonstrating the phenomenon, aggregation induced emission enhancement (AIEE). It has strong proton capture capability, allowing reversible fluorescence switching in basic and acidic medium and the emission color changes from blue to green in the aggregated state through protonation. It has been explained as a competition between intramolecular charge transfers (ICTs) and the AIEE phenomena at a lower pH range (pH ∼1-4). Such behavior enables it as a fluorescent pH sensor for detection in acidic and basic medium. Morphologies of the particles are characterized using optical and field emission scanning electron microscopic (FESEM) studies. The turn off fluorescence properties of aggregated BPQ have been utilized for the selective detection of picric acid and the fluorescence quenching is explained due to ground state complexation with a strong quenching constant, 7.81 × 10(4) M(-1).
Collapse
Affiliation(s)
- Prativa Mazumdar
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| | - Samir Maity
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| | - Milan Shyamal
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| | - Debasish Das
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| | - Gobinda Prasad Sahoo
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| | - Ajay Misra
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721 102, WB, India.
| |
Collapse
|
25
|
Dastidar P, Ganguly S, Sarkar K. Metallogels from Coordination Complexes, Organometallic, and Coordination Polymers. Chem Asian J 2016; 11:2484-98. [DOI: 10.1002/asia.201600814] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Parthasarathi Dastidar
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road, Jadavpur Kolkata 700032 West Bengal India
| | - Sumi Ganguly
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road, Jadavpur Kolkata 700032 West Bengal India
| | - Koushik Sarkar
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S. C. Mullick Road, Jadavpur Kolkata 700032 West Bengal India
| |
Collapse
|