1
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Li X, Wu Z, Wang Q, Li ZY, Sun XQ, Xiao T. Host-Guest Complexes of Pillar[5]arene as Components for Supramolecular Light-Harvesting Systems with Tunable Fluorescence. Chempluschem 2023; 88:e202300431. [PMID: 37609789 DOI: 10.1002/cplu.202300431] [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: 08/14/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 08/24/2023]
Abstract
A guest molecule containing a short alkyl spacer between the tetraphenylethylene group and the methylpyridinium group was designed and synthesized. After complexation with a water-soluble pillar[5]arene, the resulting host-guest complex can further self-assemble into fluorescence-emitting nanoparticles in water. By loading a commercially available dye Rhodamine 6G into the nanoparticles, an efficient artificial light-harvesting system with high donor/acceptor ratios (>400/1) was successfully constructed. The obtained systems show considerable antenna effects with values of more than 10 times. The system also exhibits tunable fluorescence emission behavior and can be used as a fluorescent ink for information encryption.
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Affiliation(s)
- Xiuxiu Li
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Zhiying Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Qi Wang
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing, 210023, P. R. China
| | - Zheng-Yi Li
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China
| | - Xiao-Qiang Sun
- Institute of Urban & Rural Mining, Changzhou University, Changzhou, 213164, P. R. China
| | - Tangxin Xiao
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, P. R. China
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2
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Kiewlicz J, Kwaśniewska D. Study of the properties of binary systems: selected derivatives of B-vitamins-cationic surfactant. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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3
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Domínguez SE, Vuolle A, Fattori A, Ääritalo T, Cangiotti M, Damlin P, Ottaviani MF, Kvarnström C. Enhancement of charge-assisted hydrogen bond capabilities due to O-alkylation proximity in alkoxy cationic polythiophenes: solution- and solid-state evidence via EPR, AFM and surface free energy. Phys Chem Chem Phys 2022; 24:6011-6025. [PMID: 35199803 DOI: 10.1039/d1cp04792b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite the array of applications for cationic polythiophenes (CPTs), there is still a need for structure-function guidelines and mechanistic understanding of their solution- and solid-state properties. This work presents a solution- and solid-state investigation of the effect of O-alkylation proximity on the hydrogen bonding (H-bonding) capabilities of alkoxy-CPTs, based on comparing an imidazolium alkoxy CPT with strong cation-pi, pi+ and positive charge-assisted hydrogen bonding (+CAHB) capabilities (PIMa), with two isothiouronium alkoxy CPTs with two-point +CAHB capabilities (PT1 & PT2), which have short and long alkoxy side chains, respectively. Our results show that a closer proximity of O-alkylation strengthens the +CAHB capabilities of PT1: in aqueous solutions, PT2 aggregates have a stronger interaction with cationic EPR spin probes than aggregates of PIMa and PT1, which in turn show a similar extent of repulsion towards the cationic spin probes. In solid-state, atomic force microscopy (AFM) shows that PIMa generates dendritic structures onto mica, with features of diffusion-limited aggregation (DLA), indicating strong interactions with the anionic substrate due to a high configurational entropy during spreading, regardless of being drop-casted from water or 1,4-dioxane-water (W-DI), despite the latter disturbing H-bonding due to selective solvation. PT1 is also capable of generating dendritic structures resembling ballistic aggregation (BA). However, this occurs only when casting from water, since W-DI generates island-like aggregates resembling attachment limited aggregation (ALA), which is the morphology generated by PT2 regardless of the solvent. Finally, spin-coated films of PIMa and PT1 show similar dispersivity of the surface free energy (SFE), which in turn is larger than that in PT2 films, which are also more affected when casted from W-DI, presenting much larger decreases of dispersivity. These results constitute a novel empirical structure-function guideline that could be useful for optimal design and/or processing of alkoxy CPTs. For example, dendritic patterns have recently gained attention since the colloidal droplet drying is related to engineering applications including inkjet printing, biosensing, and functional material design, while the SFE is relevant for opto- and bio-electronic applications of conjugated polyelectrolytes (CPEs). This information could also be useful when analyzing previous results obtained from alkoxy CPTs with different side chain lengths.
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Affiliation(s)
- Sergio E Domínguez
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Antti Vuolle
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Alberto Fattori
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Timo Ääritalo
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Michela Cangiotti
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Pia Damlin
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - M Francesca Ottaviani
- Department of Pure and Applied Sciences (DiSPeA), University of Urbino, 61029 Urbino, Italy
| | - Carita Kvarnström
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
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4
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Domínguez SE, Kohn B, Ääritalo T, Damlin P, Scheler U, Kvarnström C. Cationic polythiophene-anionic fullerene pair in water and water-dioxane: studies on hydrogen bonding capabilities, kinetic and thermodynamic properties. Phys Chem Chem Phys 2021; 23:21013-21028. [PMID: 34522930 DOI: 10.1039/d0cp05748g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Despite the vast array of solution- and solid-state bio-analytical, bioelectronic and optoelectronic applications of cationic polythiophenes (CPTs), the number of studies focused on the role of hydrogen bonding (H-bonding) between these and other molecules is scarce, regardless of whether H-bonding is expected to play an important role in several such applications. Also, despite the advantages of using cosolvents to systematically examine the molecular interactions, there are no such studies for CPTs to our knowledge. This work presents a steady-state UV-vis/fluorescence spectroscopic, kinetic and thermodynamic study on the H-bonding interactions between a water-soluble, cationic-anionic (isothiouronium-tetraphosphonate), polythiophene-fullerene donor-acceptor pair with two-point, charge-assisted H-bonding (CAHB) capabilities, tuned using water or a 1,4-dioxane-water mixture (W-DI). Both solvents generate photoinduced electron transfer (PET), fluorescence resonance energy transfer (FRET), spontaneous binding, H-bonding, ground-state complexing via multiple site binding, formation of micelle-like aggregates and equivalence points at a similar concentration of the quencher. However, in comparison with water, W-DI promotes less-ordered, less packed micellar aggregates, due to hydrophobic desolvation of the H-bond and larger solvent displacement during the PT1-4Fo complexation. This would decrease the extent of charge-transfer and the size of the sphere-of-quenching, mainly by displacements or rotations of the H-bonds, instead of elongations, together with a possible larger extent of diffusion-controlled static quenching. At [4Fo] larger than the equivalence point the micelles formed in water do not have available binding sites due to a tighter aggregation, causing a decrease in the quenching efficiency, while the micelles formed in W-DI start showing larger quenching efficiencies, possibly due to an increase in entropy that overcomes the desolvation of the H-bonding. These results could be useful when analyzing outputs from systems including CPTs with H-bonding capabilities, operating in (or casted from) solvents with clear differences in polarity and/or H-bonding capacity.
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Affiliation(s)
- Sergio E Domínguez
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MatSurf), Vatselankatu 2, FI-20014 Turku, Finland.
| | - Benjamin Kohn
- Leibniz-Institut für, University of Turku, D-01069 Dresden, Germany
| | - Timo Ääritalo
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MatSurf), Vatselankatu 2, FI-20014 Turku, Finland.
| | - Pia Damlin
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MatSurf), Vatselankatu 2, FI-20014 Turku, Finland.
| | - Ulrich Scheler
- Leibniz-Institut für, University of Turku, D-01069 Dresden, Germany
| | - Carita Kvarnström
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MatSurf), Vatselankatu 2, FI-20014 Turku, Finland.
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5
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Domínguez SE, Vuolle A, Butler-Hallissey C, Ääritalo T, Damlin P, Kvarnström C. J-like aggregation of a cationic polythiophene with hydrogen-bonding capabilities due to 1,4-dioxane: Solution excitation spectra and fluorescence, morphology and surface free energy of films. J Colloid Interface Sci 2021; 584:281-294. [PMID: 33069027 DOI: 10.1016/j.jcis.2020.09.124] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 11/20/2022]
Abstract
This work presents solution- and solid-state evidence of the enhancement of J-like aggregation of a cationic polythiophene (CPT) with isothiouronium functionalities (PT1), caused by a decrease in the polarity and hydrogen-bonding (H-bonding) capacity of the solvent, generated by using a 50:50 v/v 1,4-dioxane-water mixture (W-DI) instead of water. In solution, the presence of 1,4-dioxane (DI) seems to generate selective solvation, tuning the energy transfer within PT1 from inter-chain into intra-chain, enhancing J-like aggregation. On the other hand, during the casting process, the presence of DI directs the interaction with solid-substrates, generating an increase in the solid-state fluorescence, modifying the morphology from one similar to ballistic-aggregation (BA) into one similar to attachment limited aggregation (ALA), DI also modifies the SFE by increasing slightly its polar contribution (γSp) and decreasing the dispersive one (γSd). These results can be explained to be caused by a "coating" effect in presence of DI (as proposed before experimentally and computationally). Our results show a clear correlation between the solution- and solid-state properties of PT1 in each solvent, further validating the use of the fluorescence excitation spectra to trace J-like aggregation of water-soluble conjugated polymeric fluorophores in solution. This information could be useful for predicting and designing specific mesoscopic architectures of CPTs (and conjugated polyelectrolytes in general), which are molecules lacking of clear structure-function guidelines for designing high-performance polythiophene-based interlayer materials, especially for CPTs (and conjugated polyelectrolytes (CPEs) in general), particularly those with H-bonding capabilities. To the best of our knowledge the use of solution-state fluorescence excitation spectra to identify J-like aggregation of water-soluble conjugated polymers (CPs) has been scarcely used/discussed in literature and no correlation with solid-state properties was reported previously.
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Affiliation(s)
- Sergio E Domínguez
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland.
| | - Antti Vuolle
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | | | - Timo Ääritalo
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Pia Damlin
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Carita Kvarnström
- Department of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
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6
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Sinsinbar G, Gudlur S, Wood SE, Ammanath G, Yildiz HU, Alagappan P, Mrksich M, Liedberg B. Outer‐Membrane Protease (OmpT) Based
E. coli
Sensing with Anionic Polythiophene and Unlabeled Peptide Substrate. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gaurav Sinsinbar
- Centre for Biomimetic Sensor Science School of Materials Science Engineering Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
| | - Sushanth Gudlur
- Centre for Biomimetic Sensor Science School of Materials Science Engineering Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
| | - Sarah E. Wood
- Departments of Chemistry and Biomedical Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Gopal Ammanath
- Centre for Biomimetic Sensor Science School of Materials Science Engineering Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
| | - Hakan U. Yildiz
- Department of Chemistry Izmir Institute of Technology Urla 35430 Izmir Turkey
| | - Palaniappan Alagappan
- Centre for Biomimetic Sensor Science School of Materials Science Engineering Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
| | - Milan Mrksich
- Departments of Chemistry and Biomedical Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Bo Liedberg
- Centre for Biomimetic Sensor Science School of Materials Science Engineering Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore
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7
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Sinsinbar G, Gudlur S, Wood SE, Ammanath G, Yildiz HU, Alagappan P, Mrksich M, Liedberg B. Outer-Membrane Protease (OmpT) Based E. coli Sensing with Anionic Polythiophene and Unlabeled Peptide Substrate. Angew Chem Int Ed Engl 2020; 59:18068-18077. [PMID: 32618102 DOI: 10.1002/anie.202008444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Indexed: 01/07/2023]
Abstract
E. coli and Salmonella are two of the most common bacterial pathogens involved in foodborne and waterborne related deaths. Hence, it is critical to develop rapid and sensitive detection strategies for near-outbreak applications. Reported is a simple and specific assay to detect as low as 1 CFU mL-1 of E. coli in water within 6 hours by targeting the bacteria's surface protease activity. The assay relies on polythiophene acetic acid (PTAA) as an optical reporter and a short unlabeled peptide (LL37FRRV ) previously optimized as a substrate for OmpT, an outer-membrane protease on E. coli. LL37FRRV interacts with PTAA to enhance its fluorescence while also inducing the formation of a helical PTAA-LL37FRRV construct, as confirmed by circular dichroism. However, in the presence of E. coli LL37FRRV is cleaved and can no longer affect the conformations and optical properties of PTAA. This ability to distinguish between an intact and cleaved peptide was investigated in detail using LL37FRRV sequence variants.
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Affiliation(s)
- Gaurav Sinsinbar
- Centre for Biomimetic Sensor Science, School of Materials Science Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Sushanth Gudlur
- Centre for Biomimetic Sensor Science, School of Materials Science Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Sarah E Wood
- Departments of Chemistry and Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Gopal Ammanath
- Centre for Biomimetic Sensor Science, School of Materials Science Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Hakan U Yildiz
- Department of Chemistry, Izmir Institute of Technology, Urla, 35430, Izmir, Turkey
| | - Palaniappan Alagappan
- Centre for Biomimetic Sensor Science, School of Materials Science Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Milan Mrksich
- Departments of Chemistry and Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Bo Liedberg
- Centre for Biomimetic Sensor Science, School of Materials Science Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
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8
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Uddin MA, Yu H, Wang L, Naveed K, Haq F, Amin BU, Mehmood S, Nazir A, Xing Y, Shen D. Recent progress in
EPR
study of spin labeled polymers and spin probed polymer systems. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200039] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Md Alim Uddin
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Haojie Yu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Li Wang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Kaleem‐ur‐Rahman Naveed
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Fazal Haq
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Bilal Ul Amin
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Sahid Mehmood
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Ahsan Nazir
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Yusheng Xing
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
| | - Di Shen
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang China
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9
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Domínguez SE, Vuolle A, Cangiotti M, Fattori A, Ääritalo T, Damlin P, Ottaviani MF, Kvarnström C. Cationic Imidazolium Polythiophenes: Effects of Imidazolium-Methylation on Solution Concentration-Driven Aggregation and Surface Free Energy of Films Processed from Solvents with Different Polarity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2278-2290. [PMID: 32027512 PMCID: PMC7497652 DOI: 10.1021/acs.langmuir.9b03095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/13/2020] [Indexed: 06/10/2023]
Abstract
Cationic imidazolium-functionalized polythiophenes with single- or double-methylation of the imidazolium ring were used to study the impact of imidazolium-methylation on (i) the solution concentration-driven aggregation in the presence of paramagnetic probes with different ionic and hydrophobic constituents and (ii) their surface free energy (SFE) as spin-coated films deposited on plasma-activated glass. Electron paramagnetic resonance spectroscopy shows that the differences in film structuration between the polymers with different methylations originate from the early stages of aggregation. In the solid state, higher degree of imidazolium-methylation generates smaller values of total SFE, γS, (by around 2 mN/m), which could be relevant in optoelectronic applications. Methylation also causes a decrease in the polar contribution of γS (γSp), suggesting that methylation decreases the polar nature of the imidazolium ring, probably due to the blocking of its H-bonding capabilities. The values of γS obtained in the present work are similar to the values obtained for doped films of neutral conjugated polymers, such as polyaniline, poly(3-hexylthiophene), and polypyrrole. However, imidazolium-polythiophenes generate films with a larger predominance of the dispersive component of γS (γSd), probably due to the motion restriction in the ionic functionalities in a conjugated polyelectrolyte, in comparison to regular dopants. The presence of 1,4-dioxane increases γSp, especially, in the polymer with larger imidazolium-methylation (and therefore unable to interact through H-bonding), probably by a decrease of the imidazolium-glass interactions. Singly-methylated imidazolium polythiophenes have been applied as electrode selective ("buffer") interlayers in conventional and inverted organic solar cells, improving their performance. However, clear structure-function guidelines are still needed for designing high-performance polythiophene-based interlayer materials. Therefore, the information reported in this work could be useful for such applications.
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Affiliation(s)
- Sergio E. Domínguez
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Antti Vuolle
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Michela Cangiotti
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Alberto Fattori
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Timo Ääritalo
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - Pia Damlin
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
| | - M. Francesca Ottaviani
- Department
of Pure and Applied Sciences (DiSPeA), University
of Urbino, Via Ca’
Le Suore 2/4, 61029 Urbino, Italy
| | - Carita Kvarnström
- Department
of Chemistry, Turku University Centre for Materials and Surfaces (MATSURF), University of Turku, 20014 Turku, Finland
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10
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Sabury S, Collier GS, Ericson MN, Kilbey SM. Synthesis of a soluble adenine-functionalized polythiophene through direct arylation polymerization and its fluorescence responsive behavior. Polym Chem 2020. [DOI: 10.1039/c9py01142k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An adenine-functionalized polythiophene is synthesized via direct arylation polymerization using Boc-protection to overcome catalyst deactivation. The resulting copolymer is highly soluble and shows reversible fluorescence quenching.
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Affiliation(s)
- Sina Sabury
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Graham S. Collier
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
- School of Chemistry and Biochemistry
| | - M. Nance Ericson
- Electrical and Electronics Systems Research Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - S. Michael Kilbey
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
- Department of Chemical and Biomolecular Engineering
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11
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So RC, Carreon-Asok AC. Molecular Design, Synthetic Strategies, and Applications of Cationic Polythiophenes. Chem Rev 2019; 119:11442-11509. [DOI: 10.1021/acs.chemrev.8b00773] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Regina C. So
- Department of Chemistry, Ateneo de Manila University, Loyola Heights, Katipunan, Quezon City 1108, Philippines
| | - Analyn C. Carreon-Asok
- Department of Chemistry, Ateneo de Manila University, Loyola Heights, Katipunan, Quezon City 1108, Philippines
- Department of Chemistry, Xavier University−Ateneo de Cagayan University, Corrales Avenue, Cagayan de Oro City 9000, Philippines
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12
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Danielsen SPO, Davidson EC, Fredrickson GH, Segalman RA. Absence of Electrostatic Rigidity in Conjugated Polyelectrolytes with Pendant Charges. ACS Macro Lett 2019; 8:1147-1152. [PMID: 35619444 DOI: 10.1021/acsmacrolett.9b00551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The delocalization of electrons in conjugated polymers impacts their chain shape, affecting their local ordering, self-assembly, and ultimately charge transport. Conjugated polyelectrolytes introduce electrostatic interactions as a molecular design parameter to potentially tune chain rigidity by combining the π-conjugated polymer backbone with pendant ionic groups. In conventional polyelectrolytes, the self-repulsion of the bound charges induce extended rod-like chain configurations. Here, we leverage small-angle neutron scattering to measure the chain shapes of model conjugated polymers in dilute solution with controlled fractions of randomly distributed pendant charges. We find these model polythiophenes are semiflexible, with a persistence length of approximately 3 nm, regardless of charge fraction, suggesting the effective absence of electrostatic rigidity in conjugated polyelectrolytes. While the overall persistence length is negligibly impacted by pendant charges, optical spectroscopy indicates that the pendant charges increase the backbone torsion between thiophene rings without significantly impacting the π-conjugation length (the length of electron delocalization along a nearly planar backbone) in dilute solution. These results indicate the effective decoupling of the pendant ionic charges from the overall chain conformation with implications for solution processing of organic semiconductors.
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Affiliation(s)
| | - Emily C. Davidson
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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