1
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Nellissen AC, Fron E, Vandenwijngaerden JBF, De Feyter S, Mertens SFL, Van der Auweraer M. Spectroscopic Characterization of Thiacarbocyanine Dye Molecules Adsorbed on Hexagonal Boron Nitride: a Time-Resolved Study. ACS OMEGA 2023; 8:35638-35652. [PMID: 37810698 PMCID: PMC10552479 DOI: 10.1021/acsomega.3c02020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 09/06/2023] [Indexed: 10/10/2023]
Abstract
Physisorption on hexagonal boron nitride (hBN) gained interest over the years thanks to its properties (chemically and thermally stable, insulating properties, etc.) and similarities to the well-known graphene. A recent study showed flat-on adsorption of several cationic thiacarbocyanine dyes on hBN with a tendency to form weakly coupled H- or I-type aggregates, while a zwitterionic thiacarbocyanine dye rather led to a tilted adsorption. With this in-depth time-resolved study using the TC-SPC technique, we confirm the results proven by adsorption isotherms, atomic force microscopy, and stationary state spectroscopy combined with molecular mechanics simulations and estimation of the corresponding exciton interaction. The absence of a systematic trend for the dependence of the decay times, normalized amplitudes of the decay components, and contribution of different components to the stationary emission spectra upon the emission wavelength observed for all studied dyes and coverages suggests the occurrence of a single emitting species. At low coverage levels, the non-mono-exponential character of the decays was attributed to adsorption on different sites characterized by different intramolecular rotational freedom or energy transfer to nonfluorescent traps or a combination of both. The difference between the decay rates of the four dyes reflects a different density of the nonfluorescent traps. Although the decay time of the unquenched dyes was in the order of magnitude of that of dye monomers in a rigid environment, it is also compatible with weakly coupled aggregates such as proposed earlier based on the stationary spectra. Hence, the adsorption leads to a rigid environment of the dyes, blocking internal conversion. Increasing the concentration of the dye solution from which the adsorption on hBN occurs increases not only the coverage of the hBN surface but also the extent of energy transfer to nonfluorescent traps. For TDC (5,5-dichloro-3-3'-diethyl-9-ethyl-thiacarbocyanine) and TD2 (3-3'-diethyl-9-ethyl-thiacarbocyanine), besides direct energy transfer to traps, exciton hopping between dye dimers followed by energy transfer to these traps occurs, which resulted in a decreasing decay time of the longest decaying component. For all dyes, it was also possible to analyze the fluorescence decays as a stretched exponential as would be expected for energy transfer to randomly distributed traps in a two-dimensional (2D) geometry. This analysis yielded a fluorescence decay time of the unquenched dyes similar to the longest decay time obtained by analysis of the fluorescence decays as a sum of three of four exponentials.
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Affiliation(s)
- Anne-Charlotte Nellissen
- Laboratory
for Photochemistry and Spectroscopy, KU
Leuven, Chem & Tech,
Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Eduard Fron
- Laboratory
for Photochemistry and Spectroscopy, KU
Leuven, Chem & Tech,
Celestijnenlaan 200F, 3001 Leuven, Belgium
| | | | - Steven De Feyter
- Laboratory
for Photochemistry and Spectroscopy, KU
Leuven, Chem & Tech,
Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Stijn F. L. Mertens
- Department
of Chemistry, Energy Lancaster and Materials Science Institute, Lancaster University, Bailrigg, LA1 4YB Lancaster, United Kingdom
| | - Mark Van der Auweraer
- Laboratory
for Photochemistry and Spectroscopy, KU
Leuven, Chem & Tech,
Celestijnenlaan 200F, 3001 Leuven, Belgium
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2
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Willig F, Eichberger R, Bitterling K, Durfee WS, Storck W, van Der Auweraer M. Light-Induced Hole Transfer Across a Langmuir-Blodgett Double-Layer Membrane with a Short Tunneling Barrier. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.19870910908] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Itaya A, van der Auweraer M, Verschuere B, De Schryver FC. Influence of the Ionization Potential and of the Interfacial Electric Field on Photoinduced Hole Transfer Processes in Langmuir-Blodgett Films. Isr J Chem 2013. [DOI: 10.1002/ijch.199100018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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4
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Thorley KJ, Hales JM, Kim H, Ohira S, Brédas JL, Perry JW, Anderson HL. Cyanine-Like Dyes with Large Bond-Length Alternation. Chemistry 2013; 19:10370-7. [DOI: 10.1002/chem.201300609] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 05/07/2013] [Indexed: 11/05/2022]
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5
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Studies of Interaction Between Cyanine Dye T-284 and Fibrillar Alpha-Synuclein. J Fluoresc 2010; 20:1267-74. [DOI: 10.1007/s10895-010-0678-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 05/05/2010] [Indexed: 12/24/2022]
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6
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Ponterini G, Caselli M. Photoisomerization Dynamics of 3,3′-Diethyl Oxacarbocyanine. Intramolecular and Solvent Viscosity Effects. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19920960410] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Duvanel G, Grilj J, Chaumeil H, Jacques P, Vauthey E. Ultrafast excited-state dynamics of a series of zwitterionic pyridinium phenoxides with increasing sterical hindering. Photochem Photobiol Sci 2010; 9:908-15. [DOI: 10.1039/c0pp00042f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Shapovalov SA, Samoilov EA. Regularities of homo- and heteroassociation of the pinacyanol cation in aqueous solution. Russ Chem Bull 2009. [DOI: 10.1007/s11172-008-0183-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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9
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Cieślik-Boczula K, Burgess K, Li L, Nguyen B, Pandey L, De Borggraeve WM, Van der Auweraer M, Boens N. Photophysics and stability of cyano-substituted boradiazaindacene dyes. Photochem Photobiol Sci 2009; 8:1006-15. [DOI: 10.1039/b905054j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Vautravers NR, André P, Slawin AMZ, Cole-Hamilton DJ. Synthesis and characterization of photoluminescent vinylbiphenyl decorated polyhedral oligomeric silsesquioxanes. Org Biomol Chem 2008; 7:717-24. [PMID: 19194587 DOI: 10.1039/b814496f] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Grubbs cross-metathesis has been used to functionalize octavinylsilsesquioxane with fluorescent vinylbiphenyl-modified chromophores to design new hybrid organic-inorganic nanomaterials. Those macromolecules have been characterized by NMR, microanalyses, MALDI-TOF mass spectrometry and photoluminescence. This last method was shown to be an interesting tool in the analysis of the purity of the cube derivatives.
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Affiliation(s)
- Nicolas R Vautravers
- EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, UK
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11
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André P, Cheng G, Ruseckas A, van Mourik T, Früchtl H, Crayston JA, Morris RE, Cole-Hamilton D, Samuel IDW. Hybrid Dendritic Molecules with Confined Chromophore Architecture to Tune Fluorescence Efficiency. J Phys Chem B 2008; 112:16382-92. [DOI: 10.1021/jp806031q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pascal André
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Ge Cheng
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Arvydas Ruseckas
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Tanja van Mourik
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Herbert Früchtl
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Joe A. Crayston
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Russell E. Morris
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - David Cole-Hamilton
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
| | - Ifor D. W. Samuel
- SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS; EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UK KY16 9ST; and Organic Semiconductor Centre, University of St. Andrews, St. Andrews, Fife, UK KY16 9SS
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12
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Fracaroli AM, Silva OF, Granados AM, de Rossi RH. 3H-1,2-Dithiole-3-thione derivatives as novel solvatochromic dyes. J PHYS ORG CHEM 2008. [DOI: 10.1002/poc.1416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Solvent-Fluctuation Control of Solution Reactions and its Manifestation in Protein Functions. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470141663.ch12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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14
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Boens N, De Feyter S, Hofkens J, Viaene L, Van der Auweraer M. Frans De Schryver: forty years of photochemistry and photophysics. Chemphyschem 2005; 6:2215-7. [PMID: 16273573 DOI: 10.1002/cphc.200500424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Noel Boens
- Division of Molecular and Nanomaterials, Chemistry Department, K.U.Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Leuven, Belgium
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15
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Biju VP, Ye JY, Ishikawa M. Spatial Heterogeneity in a Polymer Thin Film Probed by Single Molecules. J Phys Chem B 2003. [DOI: 10.1021/jp034942c] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vasudevan Pillai Biju
- Single Molecule Bioanalysis Laboratory, National Institute of Advanced Industrial Science and Technology (AIST, Shikoku), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Jing Yong Ye
- Single Molecule Bioanalysis Laboratory, National Institute of Advanced Industrial Science and Technology (AIST, Shikoku), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Mitsuru Ishikawa
- Single Molecule Bioanalysis Laboratory, National Institute of Advanced Industrial Science and Technology (AIST, Shikoku), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
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16
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Sabaté R, Estelrich J. Determination of Micellar Microenvironment of Pinacyanol by Visible Spectroscopy. J Phys Chem B 2003. [DOI: 10.1021/jp027409q] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raimon Sabaté
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n 08028-Barcelona, Catalonia, Spain
| | - Joan Estelrich
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avda. Joan XXIII s/n 08028-Barcelona, Catalonia, Spain
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17
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Rousseau E, Koetse MM, Van der Auweraer M, De Schryyer FC. Comparison between J-aggregates in a self-assembled multilayer and polymer-bound J-aggregates in solution: a steady-state and time-resolved spectroscopic study. Photochem Photobiol Sci 2002; 1:395-406. [PMID: 12856707 DOI: 10.1039/b201690g] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of a thiacarbocyanine dye on a charged substrate via the layer-by-layer alternate adsorption technique was studied in detail. The influence of the chemical structure of the oppositely charged polyelectrolyte (PEL) in the multilayer on J-aggregate formation was investigated by means of absorption spectroscopy and steady-state and time-resolved fluorescence spectroscopy. J-Aggregates were formed yielding a bathochromic narrow absorption band. Fine tuning of the position of the absorption band is possible by incorporating other polyelectrolytes in the multilayer. The results obtained for the dye-polyelectrolyte multilayers were compared with measurements made on the aqueous dye-polyelectrolyte mixtures. The parameters obtained by fitting the fluorescence decays to several different models allowed us to suggest a mechanism for the non-radiative decay channel. The low fluorescence quantum yields and fast non-exponential fluorescence decays obtained for both the dye-polyelectrolyte multilayers and the aqueous dye polyelectrolyte mixtures were attributed to the trapping of a fast migrating exciton by a non-luminescent trap. The results related to J-aggregate formation, decay time and dimensionality of the aggregates were compared in solution and in a self-assembled multilayer.
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Affiliation(s)
- Els Rousseau
- Katholieke Universiteit Leuven, Department of Chemistry, Laboratory for Photochemistry and Spectroscopy, Celestijnenlaan 200F, 3001-Heverlee (Leuven), Belgium
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18
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Köhn F, Hofkens J, Gronheid R, Van der Auweraer M, De Schryver FC. Parameters Influencing the On- and Off-Times in the Fluorescence Intensity Traces of Single Cyanine Dye Molecules. J Phys Chem A 2002. [DOI: 10.1021/jp012959u] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fabian Köhn
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Johan Hofkens
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Roel Gronheid
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Mark Van der Auweraer
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Frans C. De Schryver
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
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19
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Guo C, Xiang J, Feng J, Tang Y, Chen C, Xu G. Effect of TiO2 Colloids on the Fluorescence Behavior of Two Cyanine Dyes. J Colloid Interface Sci 2002; 246:401-9. [PMID: 16290429 DOI: 10.1006/jcis.2001.7912] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2000] [Accepted: 08/17/2001] [Indexed: 11/22/2022]
Abstract
The photophysical properties of two typical cyanine dyes [3,3'-diethyl-9-methyl-thiacarbocyanine iodide (dye A) and anhydro-3,3'-disulfopropyl-5,5'-diphenyl-9-ethyloxacarbocyanine hydroxide (dye B)] in the absence and presence of TiO(2) colloids have been investigated by UV-visible spectroscopy, (1)H-NMR spectroscopy, fluorescence spectroscopy, fluorescence lifetime measurements, and ESR measurements. It was found from the absorption spectra and NMR results that there are two isomers in the ground state of these dyes. Steady-state fluorescence spectra show that the fluorescence intensities of dye A and dye B are enhanced and quenched by TiO(2) colloids, respectively. Time-resolved fluorescence lifetime measurements indicate that the lifetimes of dye A and dye B in the presence of TiO(2) colloids are longer and shorter than those obtained in the absence of TiO(2) colloids, respectively. ESR measurements demonstrate that the electron transfer efficiency from (1)dye B* to the conduction band of TiO(2) is much larger than that from (1)dye A* to the conduction band of TiO(2). The different fluorescence behavior of dye A and dye B can be intepreted in terms of whether phi(Tr,nr)(0)-phi(Tr,nr) (the reduction of the quantum yield for radiationless transition in the excited singlet state (1)dye* caused by the TiO(2) colloids) is larger or smaller than phi(ET) (the quantum yield of electron transfer from (1)dye* to the conduction band of TiO(2) colloids).
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Affiliation(s)
- Changning Guo
- Center for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Academia Sinica, Beijing 100080, People's Republic of China
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20
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Vranken N, Jordens S, De Belder G, Lor M, Rousseau E, Schweitzer G, Toppet S, Van der Auweraer M, De Schryver FC. The Influence of Meso-Substitution on the Photophysical Behavior of Some Thiacarbocyanine Dyes in Dilute Solution. J Phys Chem A 2001. [DOI: 10.1021/jp0123536] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nadia Vranken
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Sven Jordens
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Gino De Belder
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Marc Lor
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Els Rousseau
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Gerd Schweitzer
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Suzanne Toppet
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Mark Van der Auweraer
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Frans C. De Schryver
- Laboratory for Molecular Dynamics and Spectroscopy, Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Heverlee, Belgium
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21
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Köhn F, Hofkens J, Wiesler UM, Cotlet M, van der Auweraer M, Müllen K, De Schryver FC. Single-molecule spectroscopy of a dendrimer-based host-guest system. Chemistry 2001; 7:4126-33. [PMID: 11686590 DOI: 10.1002/1521-3765(20011001)7:19<4126::aid-chem4126>3.0.co;2-m] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We report on a single-molecule study of a host-guest system that consists of a second-generation polyphenylene dendrimer and the cyanine dye Pinacyanol. The use of single-molecule spectroscopy enables us to obtain more detailed information on the properties of the host-guest system and can be used to confirm solution data. At low dye to dendrimer ratios the system is present as a one-to-one complex, while for higher ratios an ion-pair system is formed. Changes in the spectral properties of the single molecules are explained by differences in local polarisability. The difference of the triplet lifetimes of single free dye molecules and of associated ones is interpreted as deriving from a larger free volume for the dye molecules in the dendritic host relative to the rigid polymer matrix.
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Affiliation(s)
- F Köhn
- Department of Chemistry, Katholieke Universiteit Leuven, Belgium
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Datta A, Mandal D, Pal SK, Bhattacharyya K. Photoisomerisation near a hydrophobic surface. Diethyloxadicarbocyanine iodide in a reverse micelle. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00979-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Rodríguez J, Scherlis D, Estrin D, Aramendía PF, Negri RM. AM1 Study of the Ground and Excited State Potential Energy Surfaces of Symmetric Carbocyanines. J Phys Chem A 1997. [DOI: 10.1021/jp9713569] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Javier Rodríguez
- Laboratory of Thermodynamics and Laboratory of Photochemistry, INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Damián Scherlis
- Laboratory of Thermodynamics and Laboratory of Photochemistry, INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Darío Estrin
- Laboratory of Thermodynamics and Laboratory of Photochemistry, INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - Pedro F. Aramendía
- Laboratory of Thermodynamics and Laboratory of Photochemistry, INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
| | - R. Martín Negri
- Laboratory of Thermodynamics and Laboratory of Photochemistry, INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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25
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General expression for rates of solution reactions influenced by slow solvent fluctuations, and its experimental evidence. Electrochim Acta 1997. [DOI: 10.1016/s0013-4686(97)00080-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Parameter recovery and discrimination between different types of fluorescence decays obtained for dipole-dipole energy transfer in low-dimensional systems. Chem Phys 1994. [DOI: 10.1016/0301-0104(94)89022-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Feller KH, Gadonas R, Krasauskas V, Pelakauskas A. Picosecond absorption spectroscopy of polymethine dimers. J Mol Struct 1992. [DOI: 10.1016/0022-2860(92)80057-o] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Boens N, Ameloot M, Yamazaki I, De Schryver F. On the use and the performance of the delta function convolution method for the estimation of fluorescence decay parameters. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)87006-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Van Der Auweraer M, Biesmans G, De Schryver FC. On the photophysical properties of aggregates of 3-(2-phenyl)-indolocarbocyanines. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)87196-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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