1
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Grega MN, Gan J, Noman M, Asbury JB. Reversible Ligand Detachment from CdSe Quantum Dots Following Photoexcitation. J Phys Chem Lett 2024; 15:3987-3995. [PMID: 38573308 DOI: 10.1021/acs.jpclett.4c00529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
The nanocrystal-ligand boundaries of colloidal quantum dots (QDs) mediate charge and energy transfer processes that underpin photochemical and photocatalytic transformations at their surfaces. We used time-resolved infrared spectroscopy combined with transient electronic spectroscopy to probe vibrational modes of the carboxylate anchoring groups of stearate ligands attached to cadmium selenide (CdSe) QDs that were optically excited in solid nanocrystal films. The vibrational frequencies of surface-bonded carboxylate groups revealed their interactions with surface-localized holes in the excited states of the QDs. We also observed transient and reversible photoinduced ligand detachment from CdSe nanocrystals within their excited state lifetime. By probing both surface charge distributions and ligand dynamics on QDs in their excited states, we open a pathway to explore how the nanocrystal-ligand boundary can be understood and controlled for the design of QD architectures that most effectively drive charge transfer processes in solar energy harvesting and photoredox catalysis applications.
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Affiliation(s)
- McKenna N Grega
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Jianing Gan
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Muhammad Noman
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - John B Asbury
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Intercollege Materials Science and Engineering Program, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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2
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Bagnall A, Eliasson N, Hansson S, Chavarot-Kerlidou M, Artero V, Tian H, Hammarström L. Ultrafast Electron Transfer from CuInS 2 Quantum Dots to a Molecular Catalyst for Hydrogen Production: Challenging Diffusion Limitations. ACS Catal 2024; 14:4186-4201. [PMID: 38510668 PMCID: PMC10949191 DOI: 10.1021/acscatal.3c06216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/06/2024] [Accepted: 02/16/2024] [Indexed: 03/22/2024]
Abstract
Systems integrating quantum dots with molecular catalysts are attracting ever more attention, primarily owing to their tunability and notable photocatalytic activity in the context of the hydrogen evolution reaction (HER) and CO2 reduction reaction (CO2RR). CuInS2 (CIS) quantum dots (QDs) are effective photoreductants, having relatively high-energy conduction bands, but their electronic structure and defect states often lead to poor performance, prompting many researchers to employ them with a core-shell structure. Molecular cobalt HER catalysts, on the other hand, often suffer from poor stability. Here, we have combined CIS QDs, surface-passivated with l-cysteine and iodide from a water-based synthesis, with two tetraazamacrocyclic cobalt complexes to realize systems which demonstrate high turnover numbers for the HER (up to >8000 per catalyst), using ascorbate as the sacrificial electron donor at pH = 4.5. Photoluminescence intensity and lifetime quenching data indicated a large degree of binding of the catalysts to the QDs, even with only ca. 1 μM each of QDs and catalysts, linked to an entirely static quenching mechanism. The data was fitted with a Poissonian distribution of catalyst molecules over the QDs, from which the concentration of QDs could be evaluated. No important difference in either quenching or photocatalysis was observed between catalysts with and without the carboxylate as a potential anchoring group. Femtosecond transient absorption spectroscopy confirmed ultrafast interfacial electron transfer from the QDs and the formation of the singly reduced catalyst (CoII state) for both complexes, with an average electron transfer rate constant of ≈ (10 ps)-1. These favorable results confirm that the core tetraazamacrocyclic cobalt complex is remarkably stable under photocatalytic conditions and that CIS QDs without inorganic shell structures for passivation can act as effective photosensitizers, while their smaller size makes them suitable for application in the sensitization of, inter alia, mesoporous electrodes.
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Affiliation(s)
- Andrew
J. Bagnall
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Nora Eliasson
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Sofie Hansson
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Murielle Chavarot-Kerlidou
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Vincent Artero
- Univ.
Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie
des Métaux, 17
rue des Martyrs, F-38054 Grenoble, Cedex, France
| | - Haining Tian
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
| | - Leif Hammarström
- Department
of Chemistry-Ångström Laboratory, Uppsala University, SE-75120 Uppsala, Sweden
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3
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Qi MY, Tang ZR, Xu YJ. Near Field Scattering Optical Model-Based Catalyst Design for Artificial Photoredox Transformation. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Ming-Yu Qi
- College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China
| | - Zi-Rong Tang
- College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China
| | - Yi-Jun Xu
- College of Chemistry, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China
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4
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Burke R, Bren KL, Krauss TD. Semiconductor nanocrystal photocatalysis for the production of solar fuels. J Chem Phys 2021; 154:030901. [DOI: 10.1063/5.0032172] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Rebeckah Burke
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | - Todd D. Krauss
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
- The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
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5
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McVey BFP, Swain RA, Lagarde D, Tison Y, Martinez H, Chaudret B, Nayral C, Delpech F. Unraveling the role of zinc complexes on indium phosphide nanocrystal chemistry. J Chem Phys 2019; 151:191102. [PMID: 31757128 DOI: 10.1063/1.5128234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The addition of zinc complexes to the syntheses of indium phosphide nanocrystals (InP NCs) has become commonplace, due to their ability to alter and significantly improve observed optical properties. In this paper, the role of zinc complexes on the synthesis and observed properties of InP is carefully examined. Produced InP and InP:Zn2+ NCs are thoroughly characterized from both structural (core and surface) and optical perspectives over a wide range of Zn2+ compositions (0%-43% atomic content). We find no differences in the physical (NC size and polydispersity) and structural properties (crystallographic phase) of InP and InP:Zn2+ NCs. Optically, significant changes are observed when zinc is added to InP syntheses, including blueshifted absorption edges and maxima, increased quantum yields, and the near elimination of surface state emission. These improved optical properties result from surface passivation by zinc carboxylate moieties. Changes to the optical properties begin at zinc concentrations as low as 5%, demonstrating the high sensitivity of InP optical properties to exogenous species.
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Affiliation(s)
- B F P McVey
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - R A Swain
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - D Lagarde
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Y Tison
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM-ECP), Université de Pau et des Pays de l'Adour, Hélioparc, 2 Ave. Président Angot, F-64053 Pau, France
| | - H Martinez
- Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM-ECP), Université de Pau et des Pays de l'Adour, Hélioparc, 2 Ave. Président Angot, F-64053 Pau, France
| | - B Chaudret
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - C Nayral
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - F Delpech
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
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6
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Li X, Tung C, Wu L. Quantum Dot Assembly for Light‐Driven Multielectron Redox Reactions, such as Hydrogen Evolution and CO
2
Reduction. Angew Chem Int Ed Engl 2019; 58:10804-10811. [DOI: 10.1002/anie.201901267] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Xu‐Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
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7
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Martínez-Esaín J, Puig T, Obradors X, Ros J, Farjas J, Roura-Grabulosa P, Faraudo J, Yáñez R, Ricart S. Using evolved gas analysis - mass spectrometry to characterize adsorption on a nanoparticle surface. NANOSCALE ADVANCES 2019; 1:2740-2747. [PMID: 36132724 PMCID: PMC9417425 DOI: 10.1039/c9na00098d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/03/2019] [Indexed: 06/16/2023]
Abstract
The surface chemistry of nanoparticles is the key factor to control and predict their interactions with molecules, ions, other particles, other materials, or substrates, determining key properties such as nanoparticle stability or biocompatibility. In consequence, the development of new techniques or modification of classical techniques to characterize nanoparticle surfaces is of utmost importance. Here, a classical analysis technique, thermally evolved gas analysis - mass spectrometry (EGA-MS), is employed to obtain an image of the nanoparticle-solvent interface, unraveling the molecules present on the surface. As the use of complementary techniques is urged, the validity of EGA-MS characterization is corroborated by comparison with a previously reported surface characterization method. Previous studies were based on several experimental techniques and MD simulations using YF3 nano/supraparticles and LaF3 nanoparticles as model systems. We demonstrate the applicability of this technique in two differently sized systems and two systems composed of the same ions on their surface but with a different inorganic core (e.g. LaF3 and YF3 nanoparticles). The results described in this paper agree well with our previous results combining experimental techniques and MD simulations. EGA-MS not only revealed the ions attached to the nanoparticle surface but also shed light on their coordination (e.g. citrate attached to one or two carboxylate moieties). Thus, we show that EGA-MS is a useful and efficient technique to characterize the surface chemistry of nanoparticles and to control and predict their final properties.
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Affiliation(s)
- Jordi Martínez-Esaín
- Departament de Química, Universitat Autònoma de Barcelona 08193 Bellaterra Spain
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) 08193 Bellaterra Spain
| | - Teresa Puig
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) 08193 Bellaterra Spain
| | - Xavier Obradors
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) 08193 Bellaterra Spain
| | - Josep Ros
- Departament de Química, Universitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Jordi Farjas
- University of Girona Campus Montilivi, Edif. PII E17071 Girona Spain
| | | | - Jordi Faraudo
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) 08193 Bellaterra Spain
| | - Ramón Yáñez
- Departament de Química, Universitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Susagna Ricart
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) 08193 Bellaterra Spain
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8
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Li X, Tung C, Wu L. Quantum Dot Assembly for Light‐Driven Multielectron Redox Reactions, such as Hydrogen Evolution and CO
2
Reduction. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901267] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xu‐Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TheTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- School of Future TechnologyUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
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9
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10
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Liu D, Liu Y, Huang P, Zhu C, Kang Z, Shu J, Chen M, Zhu X, Guo J, Zhuge L, Bu X, Feng P, Wu T. Highly Tunable Heterojunctions from Multimetallic Sulfide Nanoparticles and Silver Nanowires. Angew Chem Int Ed Engl 2018; 57:5374-5378. [DOI: 10.1002/anie.201800848] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/12/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Dongliang Liu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Yong Liu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Peng Huang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Cheng Zhu
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China
| | - Zhenhui Kang
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China
| | - Jie Shu
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Muzi Chen
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Xing Zhu
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Jun Guo
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Lanjian Zhuge
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Xianhui Bu
- Department of Chemistry and Biochemistry California State University Long Beach CA 90840 USA
| | - Pingyun Feng
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Tao Wu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
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11
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Liu D, Liu Y, Huang P, Zhu C, Kang Z, Shu J, Chen M, Zhu X, Guo J, Zhuge L, Bu X, Feng P, Wu T. Highly Tunable Heterojunctions from Multimetallic Sulfide Nanoparticles and Silver Nanowires. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800848] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dongliang Liu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Yong Liu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Peng Huang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
| | - Cheng Zhu
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China
| | - Zhenhui Kang
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China
| | - Jie Shu
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Muzi Chen
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Xing Zhu
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Jun Guo
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Lanjian Zhuge
- Testing & Analysis Center Soochow University Suzhou 215123 China
| | - Xianhui Bu
- Department of Chemistry and Biochemistry California State University Long Beach CA 90840 USA
| | - Pingyun Feng
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Tao Wu
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
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12
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Kessler ML, Starr HE, Knauf RR, Rountree KJ, Dempsey JL. Exchange equilibria of carboxylate-terminated ligands at PbS nanocrystal surfaces. Phys Chem Chem Phys 2018; 20:23649-23655. [DOI: 10.1039/c8cp04275f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Exchange equilibria between carboxylic acids are quantified and ligand displacement mechanisms are probed on PbS nanocrystals synthesized via two different methods.
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Affiliation(s)
| | - Hannah E. Starr
- Department of Chemistry
- University of North Carolina
- Chapel Hill
- USA
| | - Robin R. Knauf
- Department of Chemistry
- University of North Carolina
- Chapel Hill
- USA
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13
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He C, Zhang Z, Wang C, Jiang Y, Weiss EA. Reversible Modulation of the Electrostatic Potential of a Colloidal Quantum Dot through the Protonation Equilibrium of Its Ligands. J Phys Chem Lett 2017; 8:4981-4987. [PMID: 28949145 DOI: 10.1021/acs.jpclett.7b02101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This Letter describes the reversible modulation of the electrostatic potential at the interface between a colloidal PbS quantum dot (QD) and solvent, through the protonation equilibrium of the QD's histamine-derivatized dihydrolipoic acid (DHLA) ligand shell. The electrostatic potential is sensitively monitored by the yield of photoinduced electron transfer from the QD to a charged electron acceptor, 9,10-anthraquinone-2-sulfonate (AQ). The permeability of the DHLA coating to the AQ progressively increases as the average degree of protonation of the ligand shell increases from 0 to 92%, as quantified by 1H NMR, upon successive additions of p-toluenesulfonic acid; this increase results in a decrease in the photoluminescence (PL) intensity of the QDs by a factor of 6.7. The increase in permeability is attributable to favorable electrostatic interactions between the ligands and AQ. This work suggests the potential of the combination of near-IR-emitting QDs and molecular quenchers as robust local H+ sensors.
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Affiliation(s)
- Chen He
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Zhengyi Zhang
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Chen Wang
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Yishu Jiang
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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14
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He C, Nguyen TD, Edme K, Olvera de la Cruz M, Weiss EA. Noncovalent Control of the Electrostatic Potential of Quantum Dots through the Formation of Interfacial Ion Pairs. J Am Chem Soc 2017; 139:10126-10132. [DOI: 10.1021/jacs.7b05501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen He
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Trung D. Nguyen
- Department
of Materials Science and Engineering, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208-3108, United States
| | - Kedy Edme
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Monica Olvera de la Cruz
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Department
of Materials Science and Engineering, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208-3108, United States
| | - Emily A. Weiss
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Department
of Materials Science and Engineering, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208-3108, United States
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15
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Nag OK, Stewart MH, Deschamps JR, Susumu K, Oh E, Tsytsarev V, Tang Q, Efros AL, Vaxenburg R, Black BJ, Chen Y, O’Shaughnessy TJ, North SH, Field LD, Dawson PE, Pancrazio JJ, Medintz IL, Chen Y, Erzurumlu RS, Huston AL, Delehanty JB. Quantum Dot-Peptide-Fullerene Bioconjugates for Visualization of in Vitro and in Vivo Cellular Membrane Potential. ACS NANO 2017; 11:5598-5613. [PMID: 28514167 PMCID: PMC6001310 DOI: 10.1021/acsnano.7b00954] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report the development of a quantum dot (QD)-peptide-fullerene (C60) electron transfer (ET)-based nanobioconjugate for the visualization of membrane potential in living cells. The bioconjugate is composed of (1) a central QD electron donor, (2) a membrane-inserting peptidyl linker, and (3) a C60 electron acceptor. The photoexcited QD donor engages in ET with the C60 acceptor, resulting in quenching of QD photoluminescence (PL) that tracks positively with the number of C60 moieties arrayed around the QD. The nature of the QD-capping ligand also modulates the quenching efficiency; a neutral ligand coating facilitates greater QD quenching than a negatively charged carboxylated ligand. Steady-state photophysical characterization confirms an ET-driven process between the donor-acceptor pair. When introduced to cells, the amphiphilic QD-peptide-C60 bioconjugate labels the plasma membrane by insertion of the peptide-C60 portion into the hydrophobic bilayer, while the hydrophilic QD sits on the exofacial side of the membrane. Depolarization of cellular membrane potential augments the ET process, which is manifested as further quenching of QD PL. We demonstrate in HeLa cells, PC12 cells, and primary cortical neurons significant QD PL quenching (ΔF/F0 of 2-20% depending on the QD-C60 separation distance) in response to membrane depolarization with KCl. Further, we show the ability to use the QD-peptide-C60 probe in combination with conventional voltage-sensitive dyes (VSDs) for simultaneous two-channel imaging of membrane potential. In in vivo imaging of cortical electrical stimulation, the optical response of the optimal QD-peptide-C60 configuration exhibits temporal responsivity to electrical stimulation similar to that of VSDs. Notably, however, the QD-peptide-C60 construct displays 20- to 40-fold greater ΔF/F0 than VSDs. The tractable nature of the QD-peptide-C60 system offers the advantages of ease of assembly, large ΔF/F0, enhanced photostability, and high throughput without the need for complicated organic synthesis or genetic engineering, respectively, that is required of traditional VSDs and fluorescent protein constructs.
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Affiliation(s)
- Okhil K. Nag
- Center for Bio/Molecular Science and Engineering, Code 6900
| | | | | | - Kimihiro Susumu
- Optical Sciences Division, Code 5600
- Sotera Defense Solutions, Columbia, Maryland 21046, United States
| | - Eunkeu Oh
- Optical Sciences Division, Code 5600
- Sotera Defense Solutions, Columbia, Maryland 21046, United States
| | - Vassiliy Tsytsarev
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
| | - Qinggong Tang
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Alexander L. Efros
- Materials and Science and Technology Division, Code 6300, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Roman Vaxenburg
- Computational Materials Science Center, George Mason University, Fairfax, Virginia 22030, United States
| | - Bryan J. Black
- Department of Bioengineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - YungChia Chen
- Center for Bio/Molecular Science and Engineering, Code 6900
| | - Thomas J. O’Shaughnessy
- Materials and Science and Technology Division, Code 6300, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | | | - Lauren D. Field
- Center for Bio/Molecular Science and Engineering, Code 6900
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Philip E. Dawson
- Department of Chemistry, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Joseph J. Pancrazio
- Department of Bioengineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | | | - Yu Chen
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Reha S. Erzurumlu
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
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Devatha G, Roy S, Rao A, Mallick A, Basu S, Pillai PP. Electrostatically driven resonance energy transfer in "cationic" biocompatible indium phosphide quantum dots. Chem Sci 2017; 8:3879-3884. [PMID: 28626557 PMCID: PMC5465571 DOI: 10.1039/c7sc00592j] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/12/2017] [Indexed: 01/19/2023] Open
Abstract
Indium Phosphide Quantum Dots (InP QDs) have emerged as an alternative to toxic metal ion based QDs in nanobiotechnology. The ability to generate cationic surface charge, without compromising stability and biocompatibility, is essential in realizing the full potential of InP QDs in biological applications. We have addressed this challenge by developing a place exchange protocol for the preparation of cationic InP/ZnS QDs. The quaternary ammonium group provides the much required permanent positive charge and stability to InP/ZnS QDs in biofluids. The two important properties of QDs, namely bioimaging and light induced resonance energy transfer, are successfully demonstrated in cationic InP/ZnS QDs. The low cytotoxicity and stable photoluminescence of cationic InP/ZnS QDs inside cells make them ideal candidates as optical probes for cellular imaging. An efficient resonance energy transfer (E ∼ 60%) is observed, under physiological conditions, between the cationic InP/ZnS QD donor and anionic dye acceptor. A large bimolecular quenching constant along with a linear Stern-Volmer plot confirms the formation of a strong ground state complex between the cationic InP/ZnS QDs and the anionic dye. Control experiments prove the role of electrostatic attraction in driving the light induced interactions, which can rightfully form the basis for future nano-bio studies between cationic InP/ZnS QDs and anionic biomolecules.
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Affiliation(s)
- Gayathri Devatha
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Soumendu Roy
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Anish Rao
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Abhik Mallick
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Sudipta Basu
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Pramod P Pillai
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
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