1
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Zarandi MA, Pathak P, Beltrami N, Walker JN, Zhang F, Brodbelt JS, Schmehl R, Jayawickramarajah J. Heteromeric guanosine (G)-quadruplex derived antenna modules with directional energy transfer. NANOSCALE 2023; 15:19069-19073. [PMID: 37990645 PMCID: PMC11398286 DOI: 10.1039/d3nr04086k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
A heteromeric guanosine (G)-quadruplex centered self-assembly approach is developed to prepare compact light-harvesting antenna modules featuring multiple donor dyes and a single toehold region. Due to the mix-and-match nature of our approach, the number and placement of donor dyes can be readily fine-tuned via quadruplex assembly. Moreover, hybridization of the toehold with an acceptor containing sequence results in directional energy transfer ensembles with effective absorption coefficients in the 105 M-1 cm-1 range. These compact antennas exhibit system efficiencies that are comparable to much larger and elaborate DNA architectures containing numerous DNA strands.
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Affiliation(s)
| | - Pravin Pathak
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA.
| | - Noah Beltrami
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA.
| | - Jada N Walker
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA
| | - Fengqi Zhang
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA.
| | - Jennifer S Brodbelt
- Department of Chemistry, The University of Texas at Austin, Austin, TX 78712, USA
| | - Russell Schmehl
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA.
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2
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Hart SM, Gorman J, Bathe M, Schlau-Cohen GS. Engineering Exciton Dynamics with Synthetic DNA Scaffolds. Acc Chem Res 2023; 56:2051-2061. [PMID: 37345736 DOI: 10.1021/acs.accounts.3c00086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/23/2023]
Abstract
Excitons are the molecular-scale currency of electronic energy. Control over excitons enables energy to be directed and harnessed for light harvesting, electronics, and sensing. Excitonic circuits achieve such control by arranging electronically active molecules to prescribe desired spatiotemporal dynamics. Photosynthetic solar energy conversion is a canonical example of the power of excitonic circuits, where chromophores are positioned in a protein scaffold to perform efficient light capture, energy transport, and charge separation. Synthetic systems that aim to emulate this functionality include self-assembled aggregates, molecular crystals, and chromophore-modified proteins. While the potential of this approach is clear, these systems lack the structural precision to control excitons or even test the limits of their power. In recent years, DNA origami has emerged as a designer material that exploits biological building blocks to construct nanoscale architectures. The structural precision afforded by DNA origami has enabled the pursuit of naturally inspired organizational principles in a highly precise and scalable manner. In this Account, we describe recent developments in DNA-based platforms that spatially organize chromophores to construct tunable excitonic systems. The high fidelity of DNA base pairing enables the formation of programmable nanoscale architectures, and sequence-specific placement allows for the precise positioning of chromophores within the DNA structure. The integration of a wide range of chromophores across the visible spectrum introduces spectral tunability. These excitonic DNA-chromophore assemblies not only serve as model systems for light harvesting, solar conversion, and sensing but also lay the groundwork for the integration of coupled chromophores into larger-scale nucleic acid architectures.We have used this approach to generate DNA-chromophore assemblies of strongly coupled delocalized excited states through both sequence-specific self-assembly and the covalent attachment of chromophores. These strategies have been leveraged to independently control excitonic coupling and system-bath interaction, which together control energy transfer. We then extended this framework to identify how scaffold configurations can steer the formation of symmetry-breaking charge transfer states, paving the way toward the design of dual light-harvesting and charge separation DNA machinery. In an orthogonal application, we used the programmability of DNA chromophore assemblies to change the optical emission properties of strongly coupled dimers, generating a series of fluorophore-modified constructs with separable emission properties for fluorescence assays. Upcoming advances in the chemical modification of nucleotides, design of large-scale DNA origami, and predictive computational methods will aid in constructing excitonic assemblies for optical and computing applications. Collectively, the development of DNA-chromophore assemblies as a platform for excitonic circuitry offers a pathway to identifying and applying design principles for light harvesting and molecular electronics.
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Affiliation(s)
- Stephanie M Hart
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jeffrey Gorman
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mark Bathe
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Gabriela S Schlau-Cohen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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3
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Barcenas G, Biaggne A, Mass OA, Knowlton WB, Yurke B, Li L. Molecular Dynamic Studies of Dye-Dye and Dye-DNA Interactions Governing Excitonic Coupling in Squaraine Aggregates Templated by DNA Holliday Junctions. Int J Mol Sci 2023; 24:4059. [PMID: 36835471 PMCID: PMC9967300 DOI: 10.3390/ijms24044059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/09/2023] [Accepted: 02/09/2023] [Indexed: 02/22/2023] Open
Abstract
Dye molecules, arranged in an aggregate, can display excitonic delocalization. The use of DNA scaffolding to control aggregate configurations and delocalization is of research interest. Here, we applied Molecular Dynamics (MD) to gain an insight on how dye-DNA interactions affect excitonic coupling between two squaraine (SQ) dyes covalently attached to a DNA Holliday junction (HJ). We studied two types of dimer configurations, i.e., adjacent and transverse, which differed in points of dye covalent attachments to DNA. Three structurally different SQ dyes with similar hydrophobicity were chosen to investigate the sensitivity of excitonic coupling to dye placement. Each dimer configuration was initialized in parallel and antiparallel arrangements in the DNA HJ. The MD results, validated by experimental measurements, suggested that the adjacent dimer promotes stronger excitonic coupling and less dye-DNA interaction than the transverse dimer. Additionally, we found that SQ dyes with specific functional groups (i.e., substituents) facilitate a closer degree of aggregate packing via hydrophobic effects, leading to a stronger excitonic coupling. This work advances a fundamental understanding of the impacts of dye-DNA interactions on aggregate orientation and excitonic coupling.
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Affiliation(s)
- German Barcenas
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
| | - Austin Biaggne
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
| | - Olga A. Mass
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
| | - William B. Knowlton
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
- Department of Electrical and Computer Engineering, Boise State University, Boise, ID 83725, USA
| | - Bernard Yurke
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
- Department of Electrical and Computer Engineering, Boise State University, Boise, ID 83725, USA
| | - Lan Li
- Micron School of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA
- Center for Advanced Energy Studies, Idaho Falls, ID 83401, USA
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4
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Díaz SA, Pascual G, Patten LK, Roy SK, Meares A, Chiriboga M, Susumu K, Knowlton WB, Cunningham PD, Mathur D, Yurke B, Medintz IL, Lee J, Melinger JS. Towards control of excitonic coupling in DNA-templated Cy5 aggregates: the principal role of chemical substituent hydrophobicity and steric interactions. NANOSCALE 2023; 15:3284-3299. [PMID: 36723027 PMCID: PMC9932853 DOI: 10.1039/d2nr05544a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/16/2023] [Indexed: 05/27/2023]
Abstract
Understanding and controlling exciton coupling in dye aggregates has become a greater focus as potential applications such as coherent exciton devices, nanophotonics, and biosensing have been proposed. DNA nanostructure templates allow for a powerful modular approach. Using DNA Holliday junction (HJ) templates variations of dye combinations and precision dye positions can be rapidly assayed, as well as creating aggregates of dyes that could not be prepared (either due to excess or lack of solubility) through alternative means. Indodicarbocyanines (Cy5) have been studied in coupled systems due to their large transition dipole moment, which contributes to strong coupling. Cy5-R dyes were recently prepared by chemically modifying the 5,5'-substituents of indole rings, resulting in varying dye hydrophobicity/hydrophilicity, steric considerations, and electron-donating/withdrawing character. We utilized Cy5-R dyes to examine the formation and properties of 30 unique DNA templated homodimers. We find that in our system the sterics of Cy5-R dyes play the determining factor in orientation and coupling strength of dimers, with coupling strengths ranging from 50-138 meV. The hydrophobic properties of the Cy5-R modify the percentage of dimers formed, and have a secondary role in determining the packing characteristics of the dimers when sterics are equivalent. Similar to other reports, we find that positioning of the Cy5-R within the HJ template can favor particular dimer interactions, specifically oblique or H-type dimers.
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Affiliation(s)
- Sebastián A Díaz
- Center for Bio/Molecular Science and Engineering Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States.
| | - Gissela Pascual
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
| | - Lance K Patten
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
| | - Simon K Roy
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
| | - Adam Meares
- Center for Bio/Molecular Science and Engineering Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States.
| | - Matthew Chiriboga
- Center for Bio/Molecular Science and Engineering Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States.
- Volgenau School of Engineering, George Mason University, Fairfax, Virginia 22030, USA
| | - Kimihiro Susumu
- Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington, DC, USA
- Jacobs Corporation, Hanover, MD, USA
| | - William B Knowlton
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
- Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, USA
| | - Paul D Cunningham
- Electronics Science and Technology Division Code 6800, U.S. Naval Research Laboratory, Washington, D.C. 20375, USA.
| | - Divita Mathur
- Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Bernard Yurke
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
- Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, USA
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States.
| | - Jeunghoon Lee
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, USA.
- Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, USA
| | - Joseph S Melinger
- Electronics Science and Technology Division Code 6800, U.S. Naval Research Laboratory, Washington, D.C. 20375, USA.
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5
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Chiriboga M, Green CM, Mathur D, Hastman DA, Melinger JS, Veneziano R, Medintz IL, Díaz SA. Structural and optical variation of pseudoisocyanine aggregates nucleated on DNA substrates. Methods Appl Fluoresc 2023; 11. [PMID: 36719011 PMCID: PMC10362908 DOI: 10.1088/2050-6120/acb2b4] [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: 09/23/2022] [Accepted: 01/12/2023] [Indexed: 02/01/2023]
Abstract
Coherently coupled pseudoisocyanine (PIC) dye aggregates have demonstrated the ability to delocalize electronic excitations and ultimately migrate excitons with much higher efficiency than similar designs where excitations are isolated to individual chromophores. Here, we report initial evidence of a new type of PIC aggregate, formed through heterogeneous nucleation on DNA oligonucleotides, displaying photophysical properties that differ significantly from previously reported aggregates. This new aggregate, which we call the super aggregate (SA) due to the need for elevated dye excess to form it, is clearly differentiated from previously reported aggregates by spectroscopic and biophysical characterization. In emission spectra, the SA exhibits peak narrowing and, in some cases, significant quantum yield variation, indicative of stronger coupling in cyanine dyes. The SA was further characterized with circular dichroism and atomic force microscopy observing unique features depending on the DNA substrate. Then by integrating an AlexaFluorTM647 (AF) dye as an energy transfer acceptor into the system, we observed mixed energy transfer characteristics using the different DNA. For example, SA formed with a rigid DNA double crossover tile (DX-tile) substrate resulted in AF emission sensitization. While SA formed with more flexible non-DX-tile DNA (i.e. duplex and single strand DNA) resulted in AF emission quenching. These combined characterizations strongly imply that DNA-based PIC aggregate properties can be controlled through simple modifications to the DNA substrate's sequence and geometry. Ultimately, we aim to inform rational design principles for future device prototyping. For example, one key conclusion of the study is that the high absorbance cross-section and efficient energy transfer observed with rigid substrates made for better photonic antennae, compared to flexible DNA substrates.
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Affiliation(s)
- Matthew Chiriboga
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America.,Department of Bioengineering. College of Engineering and Computing, George Mason University, 4400 University Drive, Fairfax, VA 22030, United States of America
| | - Christopher M Green
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America
| | - Divita Mathur
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America.,Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, United States of America
| | - David A Hastman
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America
| | - Joseph S Melinger
- Electronics Sciences and Technology Division, U.S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America
| | - Remi Veneziano
- Department of Bioengineering. College of Engineering and Computing, George Mason University, 4400 University Drive, Fairfax, VA 22030, United States of America
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America
| | - Sebastián A Díaz
- Center for Bio/Molecular Science and Engineering Code 6900, U. S. Naval Research Laboratory, 4555 Overlook Ave. S.W. Washington, DC 20375, United States of America
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6
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Wright N, Huff JS, Barclay MS, Wilson CK, Barcenas G, Duncan KM, Ketteridge M, Obukhova OM, Krivoshey AI, Tatarets AL, Terpetschnig EA, Dean JC, Knowlton WB, Yurke B, Li L, Mass OA, Davis PH, Lee J, Turner DB, Pensack RD. Intramolecular Charge Transfer and Ultrafast Nonradiative Decay in DNA-Tethered Asymmetric Nitro- and Dimethylamino-Substituted Squaraines. J Phys Chem A 2023; 127:1141-1157. [PMID: 36705555 PMCID: PMC9923757 DOI: 10.1021/acs.jpca.2c06442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Molecular (dye) aggregates are a materials platform of interest in light harvesting, organic optoelectronics, and nanoscale computing, including quantum information science (QIS). Strong excitonic interactions between dyes are key to their use in QIS; critically, properties of the individual dyes govern the extent of these interactions. In this work, the electronic structure and excited-state dynamics of a series of indolenine-based squaraine dyes incorporating dimethylamino (electron donating) and/or nitro (electron withdrawing) substituents, so-called asymmetric dyes, were characterized. The dyes were covalently tethered to DNA Holliday junctions to suppress aggregation and permit characterization of their monomer photophysics. A combination of density functional theory and steady-state absorption spectroscopy shows that the difference static dipole moment (Δd) successively increases with the addition of these substituents while simultaneously maintaining a large transition dipole moment (μ). Steady-state fluorescence and time-resolved absorption and fluorescence spectroscopies uncover a significant nonradiative decay pathway in the asymmetrically substituted dyes that drastically reduces their excited-state lifetime (τ). This work indicates that Δd can indeed be increased by functionalizing dyes with electron donating and withdrawing substituents and that, in certain classes of dyes such as these asymmetric squaraines, strategies may be needed to ensure long τ, e.g., by rigidifying the π-conjugated network.
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Affiliation(s)
- Nicholas
D. Wright
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Jonathan S. Huff
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Matthew S. Barclay
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Christopher K. Wilson
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - German Barcenas
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Katelyn M. Duncan
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Maia Ketteridge
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Olena M. Obukhova
- SSI
“Institute for Single Crystals” of the National Academy
of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | - Alexander I. Krivoshey
- SSI
“Institute for Single Crystals” of the National Academy
of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | - Anatoliy L. Tatarets
- SSI
“Institute for Single Crystals” of the National Academy
of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | | | - Jacob C. Dean
- Department
of Physical Science, Southern Utah University, Cedar City, Utah 84720, United States
| | - William B. Knowlton
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Bernard Yurke
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Lan Li
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States,Center
for
Advanced Energy Studies, Idaho
Falls, Idaho 83401, United States
| | - Olga A. Mass
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Paul H. Davis
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States,Center
for
Advanced Energy Studies, Idaho
Falls, Idaho 83401, United States
| | - Jeunghoon Lee
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Daniel B. Turner
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Ryan D. Pensack
- †Micron
School of Materials Science & Engineering, ⊥Department of Electrical
& Computer Engineering, ○Department of Chemistry & Biochemistry, Boise State University, Boise, Idaho 83725, United States,
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7
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Zhou X, Satyabola D, Liu H, Jiang S, Qi X, Yu L, Lin S, Liu Y, Woodbury NW, Yan H. Two-Dimensional Excitonic Networks Directed by DNA Templates as an Efficient Model Light-Harvesting and Energy Transfer System. Angew Chem Int Ed Engl 2022; 61:e202211200. [PMID: 36288100 DOI: 10.1002/anie.202211200] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Indexed: 11/07/2022]
Abstract
Photosynthetic organisms organize discrete light-harvesting complexes into large-scale networks to facilitate efficient light collection and utilization. Inspired by nature, herein, synthetic DNA templates were used to direct the formation of dye aggregates with a cyanine dye, K21, into discrete branched photonic complexes, and two-dimensional (2D) excitonic networks. The DNA templates ranged from four-arm DNA tiles, ≈10 nm in each arm, to 2D wireframe DNA origami nanostructures with different geometries and varying dimensions up to 100×100 nm. These DNA-templated dye aggregates presented strongly coupled spectral features and delocalized exciton characteristics, enabling efficient photon collection and energy transfer. Compared to the discrete branched photonic systems templated on individual DNA tiles, the interconnected excitonic networks showed approximately a 2-fold increase in energy transfer efficiency. This bottom-up assembly strategy paves the way to create 2D excitonic systems with complex geometries and engineered energy pathways.
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Affiliation(s)
- Xu Zhou
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Deeksha Satyabola
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Hao Liu
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Shuoxing Jiang
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Xiaodong Qi
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Lu Yu
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Su Lin
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Yan Liu
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA.,Center for Single Molecule Biophysics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Neal W Woodbury
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Hao Yan
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
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8
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Fernandes R, Chowdhary S, Mikula N, Saleh N, Kanevche K, Berlepsch HV, Hosogi N, Heberle J, Weber M, Böttcher C, Koksch B. Cyanine Dye Coupling Mediates Self-assembly of a pH Sensitive Peptide into Novel 3D Architectures. Angew Chem Int Ed Engl 2022; 61:e202208647. [PMID: 36161448 PMCID: PMC9828782 DOI: 10.1002/anie.202208647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Indexed: 01/12/2023]
Abstract
Synthetic multichromophore systems are of great importance in artificial light harvesting devices, organic optoelectronics, tumor imaging and therapy. Here, we introduce a promising strategy for the construction of self-assembled peptide templated dye stacks based on coupling of a de novo designed pH sensitive peptide with a cyanine dye Cy5 at its N-terminus. Microscopic techniques, in particular cryogenic TEM (cryo-TEM) and cryo-electron tomography technique (cryo-ET), reveal two types of highly ordered three-dimensional assembly structures on the micrometer scale. Unbranched compact layered rods are observed at pH 7.4 and two-dimensional membrane-like assemblies at pH 3.4, both species displaying spectral features of H-aggregates. Molecular dynamics simulations reveal that the coupling of Cy5 moieties promotes the formation of both ultrastructures, whereas the protonation states of acidic and basic amino acid side chains dictates their ultimate three-dimensional organization.
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Affiliation(s)
- Rita Fernandes
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2014195BerlinGermany
| | - Suvrat Chowdhary
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2014195BerlinGermany
| | - Natalia Mikula
- Mathematics for Life and Materials SciencesZuse Institute BerlinTakustraße 714195BerlinGermany
| | - Noureldin Saleh
- Mathematics for Life and Materials SciencesZuse Institute BerlinTakustraße 714195BerlinGermany
| | - Katerina Kanevche
- Department of PhysicsExperimental Molecular BiophysicsFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Hans v. Berlepsch
- Research Center for Electron Microscopy and Core Facility BioSupraMolFreie Universität BerlinFabeckstraße 36a14195BerlinGermany
| | | | - Joachim Heberle
- Department of PhysicsExperimental Molecular BiophysicsFreie Universität BerlinArnimallee 1414195BerlinGermany
| | - Marcus Weber
- Mathematics for Life and Materials SciencesZuse Institute BerlinTakustraße 714195BerlinGermany
| | - Christoph Böttcher
- Research Center for Electron Microscopy and Core Facility BioSupraMolFreie Universität BerlinFabeckstraße 36a14195BerlinGermany
| | - Beate Koksch
- Department of Chemistry and BiochemistryFreie Universität BerlinArnimallee 2014195BerlinGermany
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9
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Mass OA, Basu S, Patten LK, Terpetschnig EA, Krivoshey AI, Tatarets AL, Pensack RD, Yurke B, Knowlton WB, Lee J. Exciton Chirality Inversion in Dye Dimers Templated by DNA Holliday Junction. J Phys Chem Lett 2022; 13:10688-10696. [PMID: 36355575 PMCID: PMC9706552 DOI: 10.1021/acs.jpclett.2c02721] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
While only one enantiomer of chiral biomolecules performs a biological function, access to both enantiomers (or enantiomorphs) proved to be advantageous for technology. Using dye covalent attachment to a DNA Holliday junction (HJ), we created two pairs of dimers of bis(chloroindolenine)squaraine dye that enabled strongly coupled molecular excitons of opposite chirality in solution. The exciton chirality inversion was achieved by interchanging single covalent linkers of unequal length tethering the dyes of each dimer to the HJ core. Dimers in each pair exhibited profound exciton-coupled circular dichroism (CD) couplets of opposite signs. Dimer geometries, modeled by simultaneous fitting absorption and CD spectra, were related in each pair as nonsuperimposable and nearly exact mirror images. The origin of observed exciton chirality inversion was explained in the view of isomerization of the stacked Holliday junction. This study will open new opportunities for creating excitonic DNA-based materials that rely on programmable system chirality.
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Affiliation(s)
- Olga A. Mass
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Shibani Basu
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Lance K. Patten
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Ewald A. Terpetschnig
- SETA
BioMedicals, LLC, 2014
Silver Court East, Urbana, Illinois 61801, United
States
| | - Alexander I. Krivoshey
- SSI
“Institute for Single Crystals” of the National Academy
of Sciences of Ukraine, 60 Nauky Ave., 61072 Kharkiv, Ukraine
| | - Anatoliy L. Tatarets
- SSI
“Institute for Single Crystals” of the National Academy
of Sciences of Ukraine, 60 Nauky Ave., 61072 Kharkiv, Ukraine
| | - Ryan D. Pensack
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Bernard Yurke
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - William B. Knowlton
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
| | - Jeunghoon Lee
- Micron
School of Materials Science & Engineering, Department of Electrical
& Computer Engineering, and Department of Chemistry and Biochemistry, Boise State University, Boise, Idaho 83725, United States
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10
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Symmetry Breaking Charge Transfer in DNA-Templated Perylene Dimer Aggregates. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196612. [PMID: 36235149 PMCID: PMC9571668 DOI: 10.3390/molecules27196612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/20/2022] [Accepted: 09/28/2022] [Indexed: 11/19/2022]
Abstract
Molecular aggregates are of interest to a broad range of fields including light harvesting, organic optoelectronics, and nanoscale computing. In molecular aggregates, nonradiative decay pathways may emerge that were not present in the constituent molecules. Such nonradiative decay pathways may include singlet fission, excimer relaxation, and symmetry-breaking charge transfer. Singlet fission, sometimes referred to as excitation multiplication, is of great interest to the fields of energy conversion and quantum information. For example, endothermic singlet fission, which avoids energy loss, has been observed in covalently bound, linear perylene trimers and tetramers. In this work, the electronic structure and excited-state dynamics of dimers of a perylene derivative templated using DNA were investigated. Specifically, DNA Holliday junctions were used to template the aggregation of two perylene molecules covalently linked to a modified uracil nucleobase through an ethynyl group. The perylenes were templated in the form of monomer, transverse dimer, and adjacent dimer configurations. The electronic structure of the perylene monomers and dimers were characterized via steady-state absorption and fluorescence spectroscopy. Initial insights into their excited-state dynamics were gleaned from relative fluorescence intensity measurements, which indicated that a new nonradiative decay pathway emerges in the dimers. Femtosecond visible transient absorption spectroscopy was subsequently used to elucidate the excited-state dynamics. A new excited-state absorption feature grows in on the tens of picosecond timescale in the dimers, which is attributed to the formation of perylene anions and cations resulting from symmetry-breaking charge transfer. Given the close proximity required for symmetry-breaking charge transfer, the results shed promising light on the prospect of singlet fission in DNA-templated molecular aggregates.
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11
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Basu S, Cervantes-Salguero K, Yurke B, Knowlton WB, Lee J, Mass OA. Photocrosslinking Probes Proximity of Thymine Modifiers Tethering Excitonically Coupled Dye Aggregates to DNA Holliday Junction. Molecules 2022; 27:4006. [PMID: 35807250 PMCID: PMC9268628 DOI: 10.3390/molecules27134006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/18/2022] [Accepted: 06/18/2022] [Indexed: 12/04/2022] Open
Abstract
A DNA Holliday junction (HJ) has been used as a versatile scaffold to create a variety of covalently templated molecular dye aggregates exhibiting strong excitonic coupling. In these dye-DNA constructs, one way to attach dyes to DNA is to tether them via single long linkers to thymine modifiers incorporated in the core of the HJ. Here, using photoinduced [2 + 2] cycloaddition (photocrosslinking) between thymines, we investigated the relative positions of squaraine-labeled thymine modifiers in the core of the HJ, and whether the proximity of thymine modifiers correlated with the excitonic coupling strength in squaraine dimers. Photocrosslinking between squaraine-labeled thymine modifiers was carried out in two distinct types of configurations: adjacent dimer and transverse dimer. The outcomes of the reactions in terms of relative photocrosslinking yields were evaluated by denaturing polyacrylamide electrophoresis. We found that for photocrosslinking to occur at a high yield, a synergetic combination of three parameters was necessary: adjacent dimer configuration, strong attractive dye-dye interactions that led to excitonic coupling, and an A-T neighboring base pair. The insight into the proximity of dye-labeled thymines in adjacent and transverse configurations correlated with the strength of excitonic coupling in the corresponding dimers. To demonstrate a utility of photocrosslinking, we created a squaraine tetramer templated by a doubly crosslinked HJ with increased thermal stability. These findings provide guidance for the design of HJ-templated dye aggregates exhibiting strong excitonic coupling for exciton-based applications such as organic optoelectronics and quantum computing.
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Affiliation(s)
- Shibani Basu
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
| | - Keitel Cervantes-Salguero
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
| | - Bernard Yurke
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
- Department of Electrical & Computer Engineering, Boise State University, Boise, ID 83725, USA
| | - William B. Knowlton
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
- Department of Electrical & Computer Engineering, Boise State University, Boise, ID 83725, USA
| | - Jeunghoon Lee
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
- Department of Chemistry and Biochemistry, Boise State University, Boise, ID 83725, USA
| | - Olga A. Mass
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725, USA; (S.B.); (K.C.-S.); (B.Y.); (W.B.K.)
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12
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Algar WR, Krause KD. Developing FRET Networks for Sensing. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2022; 15:17-36. [PMID: 35300526 DOI: 10.1146/annurev-anchem-061020-014925] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Förster resonance energy transfer (FRET) is a widely used fluorescence-based sensing mechanism. To date, most implementations of FRET sensors have relied on a discrete donor-acceptor pair for detection of each analytical target. FRET networks are an emerging concept in which target recognition perturbs a set of interconnected FRET pathways between multiple emitters. Here, we review the energy transfer topologies and scaffold materials for FRET networks, propose a general nomenclature, and qualitatively summarize the dynamics of the competitive, sequential, homoFRET, and heteroFRET pathways that constitute FRET networks. Implementations of FRET networks for sensing are also described, including concentric FRET probes, other single-vector multiplexing, and logic gates and switches. Unresolved questions and future research directions for current systems are discussed, as are potential but currently unexplored applications of FRET networks in sensing.
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Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada;
| | - Katherine D Krause
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada;
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13
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Zhou X, Lin S, Yan H. Interfacing DNA nanotechnology and biomimetic photonic complexes: advances and prospects in energy and biomedicine. J Nanobiotechnology 2022; 20:257. [PMID: 35658974 PMCID: PMC9164479 DOI: 10.1186/s12951-022-01449-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
Self-assembled photonic systems with well-organized spatial arrangement and engineered optical properties can be used as efficient energy materials and as effective biomedical agents. The lessons learned from natural light-harvesting antennas have inspired the design and synthesis of a series of biomimetic photonic complexes, including those containing strongly coupled dye aggregates with dense molecular packing and unique spectroscopic features. These photoactive components provide excellent features that could be coupled to multiple applications including light-harvesting, energy transfer, biosensing, bioimaging, and cancer therapy. Meanwhile, nanoscale DNA assemblies have been employed as programmable and addressable templates to guide the formation of DNA-directed multi-pigment complexes, which can be used to enhance the complexity and precision of artificial photonic systems and show the potential for energy and biomedical applications. This review focuses on the interface of DNA nanotechnology and biomimetic photonic systems. We summarized the recent progress in the design, synthesis, and applications of bioinspired photonic systems, highlighted the advantages of the utilization of DNA nanostructures, and discussed the challenges and opportunities they provide.
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Affiliation(s)
- Xu Zhou
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Su Lin
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA.,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA
| | - Hao Yan
- Center for Molecular Design and Biomimetics at the Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA. .,School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA.
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14
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Zhou X, Liu H, Djutanta F, Satyabola D, Jiang S, Qi X, Yu L, Lin S, Hariadi RF, Liu Y, Woodbury NW, Yan H. DNA-templated programmable excitonic wires for micron-scale exciton transport. Chem 2022. [DOI: 10.1016/j.chempr.2022.05.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Chowdhury A, Díaz S, Huff JS, Barclay MS, Chiriboga M, Ellis GA, Mathur D, Patten LK, Sup A, Hallstrom N, Cunningham PD, Lee J, Davis PH, Turner DB, Yurke B, Knowlton WB, Medintz IL, Melinger JS, Pensack RD. Tuning between Quenching and Energy Transfer in DNA-Templated Heterodimer Aggregates. J Phys Chem Lett 2022; 13:2782-2791. [PMID: 35319215 PMCID: PMC8978177 DOI: 10.1021/acs.jpclett.2c00017] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/15/2022] [Indexed: 05/07/2023]
Abstract
Molecular excitons, which propagate spatially via electronic energy transfer, are central to numerous applications including light harvesting, organic optoelectronics, and nanoscale computing; they may also benefit applications such as photothermal therapy and photoacoustic imaging through the local generation of heat via rapid excited-state quenching. Here we show how to tune between energy transfer and quenching for heterodimers of the same pair of cyanine dyes by altering their spatial configuration on a DNA template. We assemble "transverse" and "adjacent" heterodimers of Cy5 and Cy5.5 using DNA Holliday junctions. We find that the transverse heterodimers exhibit optical properties consistent with excitonically interacting dyes and fluorescence quenching, while the adjacent heterodimers exhibit optical properties consistent with nonexcitonically interacting dyes and disproportionately large Cy5.5 emission, suggestive of energy transfer between dyes. We use transient absorption spectroscopy to show that quenching in the transverse heterodimer occurs via rapid nonradiative decay to the ground state (∼31 ps) and that in the adjacent heterodimer rapid energy transfer from Cy5 to Cy5.5 (∼420 fs) is followed by Cy5.5 excited-state relaxation (∼700 ps). Accessing such drastically different photophysics, which may be tuned on demand for different target applications, highlights the utility of DNA as a template for dye aggregation.
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Affiliation(s)
- Azhad
U. Chowdhury
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Sebastián
A. Díaz
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Jonathan S. Huff
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Matthew S. Barclay
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Matthew Chiriboga
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
- Volgenau
School of Engineering, George Mason University, Fairfax, Virginia 22030, United States
| | - Gregory A. Ellis
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Divita Mathur
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
- College
of
Science, George Mason University, Fairfax, Virginia 22030, United States
| | - Lance K. Patten
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Aaron Sup
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Natalya Hallstrom
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Paul D. Cunningham
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Jeunghoon Lee
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Paul H. Davis
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Daniel B. Turner
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Bernard Yurke
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - William B. Knowlton
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Igor L. Medintz
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Joseph S. Melinger
- Center for Bio/Molecular
Science and Engineering Code 6900 and Electronics Science
and Technology Division Code 6800, U.S.
Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Ryan D. Pensack
- Micron
School of Materials Science & Engineering, Department of Physics, Department of Chemistry
& Biochemistry, and Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
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16
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Hart SM, Wang X, Guo J, Bathe M, Schlau-Cohen GS. Tuning Optical Absorption and Emission Using Strongly Coupled Dimers in Programmable DNA Scaffolds. J Phys Chem Lett 2022; 13:1863-1871. [PMID: 35175058 DOI: 10.1021/acs.jpclett.1c03848] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Molecular materials for light harvesting, computing, and fluorescence imaging require nanoscale integration of electronically active subunits. Variation in the optical absorption and emission properties of the subunits has primarily been achieved through modifications to the chemical structure, which is often synthetically challenging. Here, we introduce a facile method for varying optical absorption and emission properties by changing the geometry of a strongly coupled Cy3 dimer on a double-crossover (DX) DNA tile. Leveraging the versatility and programmability of DNA, we tune the length of the complementary strand so that it "pushes" or "pulls" the dimer, inducing dramatic changes in the photophysics including lifetime differences observable at the ensemble and single-molecule level. The separable lifetimes, along with environmental sensitivity also observed in the photophysics, suggest that the Cy3-DX tile constructs could serve as fluorescence probes for multiplexed imaging. More generally, these constructs establish a framework for easily controllable photophysics via geometric changes to coupled chromophores, which could be applied in light-harvesting devices and molecular electronics.
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Affiliation(s)
- Stephanie M Hart
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Xiao Wang
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jiajia Guo
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mark Bathe
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Gabriela S Schlau-Cohen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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17
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Mass OA, Wilson CK, Barcenas G, Terpetschnig EA, Obukhova OM, Kolosova OS, Tatarets AL, Li L, Yurke B, Knowlton WB, Pensack RD, Lee J. Influence of Hydrophobicity on Excitonic Coupling in DNA-Templated Indolenine Squaraine Dye Aggregates. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:3475-3488. [PMID: 35242270 PMCID: PMC8883467 DOI: 10.1021/acs.jpcc.1c08981] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/15/2022] [Indexed: 06/01/2023]
Abstract
Control over the strength of excitonic coupling in molecular dye aggregates is a substantial factor for the development of technologies such as light harvesting, optoelectronics, and quantum computing. According to the molecular exciton model, the strength of excitonic coupling is inversely proportional to the distance between dyes. Covalent DNA templating was proved to be a versatile tool to control dye spacing on a subnanometer scale. To further expand our ability to control photophysical properties of excitons, here, we investigated the influence of dye hydrophobicity on the strength of excitonic coupling in squaraine aggregates covalently templated by DNA Holliday Junction (DNA HJ). Indolenine squaraines were chosen for their excellent spectral properties, stability, and diversity of chemical modifications. Six squaraines of varying hydrophobicity from highly hydrophobic to highly hydrophilic were assembled in two dimer configurations and a tetramer. In general, the examined squaraines demonstrated a propensity toward face-to-face aggregation behavior observed via steady-state absorption, fluorescence, and circular dichroism spectroscopies. Modeling based on the Kühn-Renger-May approach quantified the strength of excitonic coupling in the squaraine aggregates. The strength of excitonic coupling strongly correlated with squaraine hydrophobic region. Dimer aggregates of dichloroindolenine squaraine were found to exhibit the strongest coupling strength of 132 meV (1065 cm-1). In addition, we identified the sites for dye attachment in the DNA HJ that promote the closest spacing between the dyes in their dimers. The extracted aggregate geometries, and the role of electrostatic and steric effects in squaraine aggregation are also discussed. Taken together, these findings provide a deeper insight into how dye structures influence excitonic coupling in dye aggregates covalently templated via DNA, and guidance in design rules for exciton-based materials and devices.
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Affiliation(s)
- Olga A. Mass
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Christopher K. Wilson
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - German Barcenas
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | | | - Olena M. Obukhova
- State
Scientific Institution “Institute for Single Crystals”
of National Academy of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | - Olga S. Kolosova
- State
Scientific Institution “Institute for Single Crystals”
of National Academy of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | - Anatoliy L. Tatarets
- State
Scientific Institution “Institute for Single Crystals”
of National Academy of Sciences of Ukraine, Kharkiv 61072, Ukraine
| | - Lan Li
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
- Center
for Advanced Energy Studies, Idaho
Falls, Idaho 83401, United States
| | - Bernard Yurke
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
- Department
of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - William B. Knowlton
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
- Department
of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Ryan. D. Pensack
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Jeunghoon Lee
- Micron
School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
- Department
of Chemistry and Biochemistry, Boise State
University, Boise, Idaho 83725, United
States
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18
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Wang X, Sha R, Knowlton WB, Seeman NC, Canary JW, Yurke B. Exciton Delocalization in a DNA-Templated Organic Semiconductor Dimer Assembly. ACS NANO 2022; 16:1301-1307. [PMID: 34979076 PMCID: PMC8793135 DOI: 10.1021/acsnano.1c09143] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/29/2021] [Indexed: 06/01/2023]
Abstract
A chiral dimer of an organic semiconductor was assembled from octaniline (octamer of polyaniline) conjugated to DNA. Facile reconfiguration between the monomer and dimer of octaniline-DNA was achieved. The geometry of the dimer and the exciton coupling between octaniline molecules in the assembly was studied both experimentally and theoretically. The octaniline dimer was readily switched between different electronic states by protonic doping and exhibited a Davydov splitting comparable to those previously reported for DNA-dye systems employing dyes with strong transition dipoles. This approach provides a possible platform for studying the fundamental properties of organic semiconductors with DNA-templated assemblies, which serve as candidates for artificial light-harvesting systems and excitonic devices.
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Affiliation(s)
- Xiao Wang
- Department
of Chemistry, New York University, New York, New York 10003, United States
| | - Ruojie Sha
- Department
of Chemistry, New York University, New York, New York 10003, United States
| | - William B. Knowlton
- Micron
School for Materials Science and Engineering and Department of Electrical
& Computer Engineering, Boise State
University, Boise, Idaho 83725, United States
| | - Nadrian C. Seeman
- Department
of Chemistry, New York University, New York, New York 10003, United States
| | - James W. Canary
- Department
of Chemistry, New York University, New York, New York 10003, United States
| | - Bernard Yurke
- Micron
School for Materials Science and Engineering and Department of Electrical
& Computer Engineering, Boise State
University, Boise, Idaho 83725, United States
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19
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Navotnaya P, Sohoni S, Lloyd LT, Abdulhadi SM, Ting PC, Higgins JS, Engel GS. Annihilation of Excess Excitations along Phycocyanin Rods Precedes Downhill Flow to Allophycocyanin Cores in the Phycobilisome of Synechococcus elongatus PCC 7942. J Phys Chem B 2022; 126:23-29. [PMID: 34982932 PMCID: PMC8762654 DOI: 10.1021/acs.jpcb.1c06509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Cyanobacterial phycobilisome
complexes absorb visible sunlight
and funnel photogenerated excitons to the photosystems where charge
separation occurs. In the phycobilisome complex of Synechococcus
elongatus PCC 7942, phycocyanin protein rods that absorb
bluer wavelengths are assembled on allophycocyanin cores that absorb
redder wavelengths. This arrangement creates a natural energy gradient
toward the reaction centers of the photosystems. Here, we employ broadband
pump–probe spectroscopy to observe the fate of excess excitations
in the phycobilisome complex of this organism. We show that excess
excitons are quenched through exciton–exciton annihilation
along the phycocyanin rods prior to transfer to the allophycocyanin
cores. Our observations are especially relevant in comparison to other
antenna proteins, where exciton annihilation primarily occurs in the
lowest-energy chlorophylls. The observed effect could play a limited
photoprotective role in physiological light fluences. The exciton
decay dynamics is faster in the intact phycobilisome than in isolated
C-phycocyanin trimers studied in earlier work, confirming that this
effect is an emergent property of the complex assembly. Using the
obtained annihilation data, we calculate exciton hopping times of
2.2–6.4 ps in the phycocyanin rods. This value agrees with
earlier FRET calculations of exciton hopping times along phycocyanin
hexamers by Sauer and Scheer.
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Affiliation(s)
- Polina Navotnaya
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Siddhartha Sohoni
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Lawson T Lloyd
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Sami M Abdulhadi
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Po-Chieh Ting
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jacob S Higgins
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Gregory S Engel
- Department of Chemistry, James Franck Institute and Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
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20
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Rolczynski BS, Díaz SA, Kim YC, Medintz IL, Cunningham PD, Melinger JS. Understanding Disorder, Vibronic Structure, and Delocalization in Electronically Coupled Dimers on DNA Duplexes. J Phys Chem A 2021; 125:9632-9644. [PMID: 34709821 DOI: 10.1021/acs.jpca.1c07205] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Structural DNA nanotechnology is a promising approach to create chromophore networks with modular structures and Hamiltonians to control the material's functions. The functional behaviors of these systems depend on the interactions of the chromophores' vibronic states, as well as interactions with their environment. To optimize their functions, it is necessary to characterize the chromophore network's structural and energetic properties, including the electronic delocalization in some cases. In this study, parameters of interest are deduced in DNA-scaffolded Cyanine 3 and Cyanine 5 dimers. The methods include steady-state optical measurements, physical modeling, and a genetic algorithm approach. The parameters include the chromophore network's vibronic Hamiltonian, molecular positions, transition dipole orientations, and environmentally induced energy broadening. Additionally, the study uses temperature-dependent optical measurements to characterize the spectral broadening further. These combined results reveal the quantum mechanical delocalization, which is important for functions like coherent energy transport and quantum information applications.
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Affiliation(s)
- Brian S Rolczynski
- Electronics Science and Technology Division, Code 6800, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Sebastián A Díaz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Young C Kim
- Materials Science and Technology Division, Code 6300, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Paul D Cunningham
- Electronics Science and Technology Division, Code 6800, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Joseph S Melinger
- Electronics Science and Technology Division, Code 6800, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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21
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Huff JS, Turner DB, Mass OA, Patten LK, Wilson CK, Roy SK, Barclay MS, Yurke B, Knowlton WB, Davis PH, Pensack RD. Excited-State Lifetimes of DNA-Templated Cyanine Dimer, Trimer, and Tetramer Aggregates: The Role of Exciton Delocalization, Dye Separation, and DNA Heterogeneity. J Phys Chem B 2021; 125:10240-10259. [PMID: 34473494 PMCID: PMC8450906 DOI: 10.1021/acs.jpcb.1c04517] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
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DNA-templated molecular
(dye) aggregates are a novel class of materials
that have garnered attention in a broad range of areas including light
harvesting, sensing, and computing. Using DNA to template dye aggregation
is attractive due to the relative ease with which DNA nanostructures
can be assembled in solution, the diverse array of nanostructures
that can be assembled, and the ability to precisely position dyes
to within a few Angstroms of one another. These factors, combined
with the programmability of DNA, raise the prospect of designer materials
custom tailored for specific applications. Although considerable progress
has been made in characterizing the optical properties and associated
electronic structures of these materials, less is known about their
excited-state dynamics. For example, little is known about how the
excited-state lifetime, a parameter essential to many applications,
is influenced by structural factors, such as the number of dyes within
the aggregate and their spatial arrangement. In this work, we use
a combination of transient absorption spectroscopy and global target
analysis to measure excited-state lifetimes in a series of DNA-templated
cyanine dye aggregates. Specifically, we investigate six distinct
dimer, trimer, and tetramer aggregates—based on the ubiquitous
cyanine dye Cy5—templated using both duplex and Holliday junction
DNA nanostructures. We find that these DNA-templated Cy5 aggregates
all exhibit significantly reduced excited-state lifetimes, some by
more than 2 orders of magnitude, and observe considerable variation
among the lifetimes. We attribute the reduced excited-state lifetimes
to enhanced nonradiative decay and proceed to discuss various structural
factors, including exciton delocalization, dye separation, and DNA
heterogeneity, that may contribute to the observed reduction and variability
of excited-state lifetimes. Guided by insights from structural modeling,
we find that the reduced lifetimes and enhanced nonradiative decay
are most strongly correlated with the distance between the dyes. These
results inform potential tradeoffs between dye separation, excitonic
coupling strength, and excited-state lifetime that motivate deeper
mechanistic understanding, potentially via further dye and dye template
design.
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Affiliation(s)
- Jonathan S Huff
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Daniel B Turner
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Olga A Mass
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Lance K Patten
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Christopher K Wilson
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Simon K Roy
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Matthew S Barclay
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Bernard Yurke
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States.,Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - William B Knowlton
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States.,Department of Electrical & Computer Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Paul H Davis
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
| | - Ryan D Pensack
- Micron School of Materials Science & Engineering, Boise State University, Boise, Idaho 83725, United States
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22
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Barcenas G, Biaggne A, Mass OA, Wilson CK, Obukhova OM, Kolosova OS, Tatarets AL, Terpetschnig E, Pensack RD, Lee J, Knowlton WB, Yurke B, Li L. First-principles studies of substituent effects on squaraine dyes. RSC Adv 2021; 11:19029-19040. [PMID: 35478639 PMCID: PMC9033489 DOI: 10.1039/d1ra01377g] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/17/2021] [Indexed: 01/21/2023] Open
Abstract
Dye molecules that absorb light in the visible region are key components in many applications, including organic photovoltaics, biological fluorescent labeling, super-resolution microscopy, and energy transport. One family of dyes, known as squaraines, has received considerable attention recently due to their favorable electronic and photophysical properties. In addition, these dyes have a strong propensity for aggregation, which results in emergent materials properties, such as exciton delocalization. This will be of benefit in charge separation and energy transport along with fundamental studies in quantum information. Given the high structural tunability of squaraine dyes, it is possible that exciton delocalization could be tailored by modifying the substituents attached to the π-conjugated network. To date, limited theoretical studies have explored the role of substituent effects on the electronic and photophysical properties of squaraines in the context of DNA-templated dye aggregates and resultant excitonic behavior. We used ab initio theoretical methods to determine the effects of substituents on the electronic and photophysical properties for a series of nine different squaraine dyes. Solvation free energy was also investigated as an insight into changes in hydrophobic behavior from substituents. The role of molecular symmetry on these properties was also explored via conformation and substitution. We found that substituent effects are correlated with the empirical Hammett constant, which demonstrates their electron donating or electron withdrawing strength. Electron withdrawing groups were found to impact solvation free energy, transition dipole moment, static dipole difference, and absorbance more than electron donating groups. All substituents showed a redshift in absorption for the squaraine dye. In addition, solvation free energy increases with Hammett constant. This work represents a first step toward establishing design rules for dyes with desired properties for excitonic applications. Squaraine dyes are candidates for DNA-templated excitonic interactions. This work presents substituent effects on the electronic and photophysicalproperties of squaraine dyes and a correlation between empirical Hammettconstant and those properties.![]()
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Affiliation(s)
- German Barcenas
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA
| | - Austin Biaggne
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA
| | - Olga A Mass
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA
| | - Christopher K Wilson
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA
| | - Olena M Obukhova
- SSI "Institute for Single Crystals" of National Academy of Sciences of Ukraine Kharkov 61072 Ukraine
| | - Olga S Kolosova
- SSI "Institute for Single Crystals" of National Academy of Sciences of Ukraine Kharkov 61072 Ukraine
| | - Anatoliy L Tatarets
- SSI "Institute for Single Crystals" of National Academy of Sciences of Ukraine Kharkov 61072 Ukraine.,SETA BioMedicals Urbana IL 61802 USA
| | | | - Ryan D Pensack
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA
| | - Jeunghoon Lee
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA .,Department of Chemistry and Biochemistry, Boise State University Boise ID 83725 USA
| | - William B Knowlton
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA .,Department of Electrical and Computer Engineering, Boise State University Boise ID 83725 USA
| | - Bernard Yurke
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA .,Department of Electrical and Computer Engineering, Boise State University Boise ID 83725 USA
| | - Lan Li
- Micron School of Materials Science and Engineering, Boise State University Boise ID 83725 USA .,Center for Advanced Energy Studies Idaho Falls ID 83401 USA
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23
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Kim S, Park KS. Fluorescence resonance energy transfer using DNA-templated copper nanoparticles for ratiometric detection of microRNAs. Analyst 2021; 146:1844-1847. [PMID: 33606855 DOI: 10.1039/d0an02371j] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We examined the effectiveness of a ratiometric method using DNA-templated copper nanoparticles, which can function as a probe for fluorescence resonance energy transfer. This method in combination with PCR successfully detected the target microRNA, which corresponded well with the results obtained by quantitative reverse transcription PCR.
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Affiliation(s)
- Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea.
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24
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Hart SM, Chen WJ, Banal JL, Bricker WP, Dodin A, Markova L, Vyborna Y, Willard AP, Häner R, Bathe M, Schlau-Cohen GS. Engineering couplings for exciton transport using synthetic DNA scaffolds. Chem 2021. [DOI: 10.1016/j.chempr.2020.12.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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25
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Barclay MS, Roy SK, Huff JS, Mass OA, Turner DB, Wilson CK, Kellis DL, Terpetschnig EA, Lee J, Davis PH, Yurke B, Knowlton WB, Pensack RD. Rotaxane rings promote oblique packing and extended lifetimes in DNA-templated molecular dye aggregates. Commun Chem 2021; 4:19. [PMID: 35474961 PMCID: PMC9037907 DOI: 10.1038/s42004-021-00456-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 01/14/2021] [Indexed: 01/27/2023] Open
Abstract
Molecular excitons play a central role in natural and artificial light harvesting, organic electrònics, and nanoscale computing. The structure and dynamics of molecular excitons, critical to each application, are sensitively governed by molecular packing. Deoxyribonucleic acid (DNA) templating is a powerful approach that enables controlled aggregation via sub-nanometer positioning of molecular dyes. However, finer sub-Angstrom control of dye packing is needed to tailor excitonic properties for specific applications. Here, we show that adding rotaxane rings to squaraine dyes templated with DNA promotes an elusive oblique packing arrangement with highly desirable optical properties. Specifically, dimers of these squaraine:rotaxanes exhibit an absorption spectrum with near-equal intensity excitonically split absorption bands. Theoretical analysis indicates that the transitions are mostly electronic in nature and only have similar intensities over a narrow range of packing angles. Compared with squaraine dimers, squaraine:rotaxane dimers also exhibit extended excited-state lifetimes and less structural heterogeneity. The approach proposed here may be generally useful for optimizing excitonic materials for a variety of applications ranging from solar energy conversion to quantum information science.
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Affiliation(s)
- Matthew S. Barclay
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Simon K. Roy
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Jonathan S. Huff
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Olga A. Mass
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Daniel B. Turner
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Christopher K. Wilson
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Donald L. Kellis
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | | | - Jeunghoon Lee
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
- Department of Chemistry & Biochemistry, Boise State University, Boise, ID 83725 USA
| | - Paul H. Davis
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
| | - Bernard Yurke
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
- Department of Electrical & Computer Engineering, Boise State University, Boise, ID 83725 USA
| | - William B. Knowlton
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
- Department of Electrical & Computer Engineering, Boise State University, Boise, ID 83725 USA
| | - Ryan D. Pensack
- Micron School of Materials Science & Engineering, Boise State University, Boise, ID 83725 USA
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26
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Mass OA, Wilson CK, Roy SK, Barclay MS, Patten LK, Terpetschnig EA, Lee J, Pensack RD, Yurke B, Knowlton WB. Exciton Delocalization in Indolenine Squaraine Aggregates Templated by DNA Holliday Junction Scaffolds. J Phys Chem B 2020; 124:9636-9647. [PMID: 33052691 DOI: 10.1021/acs.jpcb.0c06480] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Exciton delocalization plays a prominent role in the photophysics of molecular aggregates, ultimately governing their particular function or application. Deoxyribonucleic acid (DNA) is a compelling scaffold in which to template molecular aggregates and promote exciton delocalization. As individual dye molecules are the basis of exciton delocalization in molecular aggregates, their judicious selection is important. Motivated by their excellent photostability and spectral properties, here, we examine the ability of squaraine dyes to undergo exciton delocalization when aggregated via a DNA Holliday junction (HJ) template. A commercially available indolenine squaraine dye was chosen for the study given its strong structural resemblance to Cy5, a commercially available cyanine dye previously shown to undergo exciton delocalization in DNA HJs. Three types of DNA-dye aggregate configurations-transverse dimer, adjacent dimer, and tetramer-were investigated. Signatures of exciton delocalization were observed in all squaraine-DNA aggregates. Specifically, strong blue shift and Davydov splitting were observed in steady-state absorption spectroscopy and exciton-induced features were evident in circular dichroism (CD) spectroscopy. Strongly suppressed fluorescence emission provided additional, indirect evidence for exciton delocalization in the DNA-templated squaraine dye aggregates. To quantitatively evaluate and directly compare the excitonic Coulombic coupling responsible for exciton delocalization, the strength of excitonic hopping interactions between the dyes was obtained by simultaneously fitting the experimental steady-state absorption and CD spectra via a Holstein-like Hamiltonian, in which, following the theoretical approach of Kühn, Renger, and May, the dominant vibrational mode is explicitly considered. The excitonic hopping strength within indolenine squaraines was found to be comparable to that of the analogous Cy5 DNA-templated aggregate. The squaraine aggregates adopted primarily an H-type (dyes oriented parallel to each other) spatial arrangement. Extracted geometric details of the dye mutual orientation in the aggregates enabled a close comparison of aggregate configurations and the elucidation of the influence of dye angular relationship on excitonic hopping interactions in squaraine aggregates. These results encourage the application of squaraine-based aggregates in next-generation systems driven by molecular excitons.
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Affiliation(s)
| | | | | | | | | | - Ewald A Terpetschnig
- SETA BioMedicals, LLC, 2014 Silver Court East, Urbana, Illinois 61801, United States
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