1
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Fu W, Yin J, Cao H, Zhou Z, Zhang J, Fu J, Warner JH, Wang C, Jia X, Greaves GN, Cheetham AK. Non-Blinking Luminescence from Charged Single Graphene Quantum Dots. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304074. [PMID: 37395476 DOI: 10.1002/adma.202304074] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/24/2023] [Accepted: 06/26/2023] [Indexed: 07/04/2023]
Abstract
Photoluminescence blinking behavior from single quantum dots under steady illumination is an important but controversial topic. Its occurrence has impeded the use of single quantum dots in bioimaging. Different mechanisms have been proposed to account for it, although controversial, the most important of which is the non-radiative Auger recombination mechanism whereby photocharging of quantum dots can lead to the blinking phenomenon. Here, the singly charged trion, which maintains photon emission, including radiative recombination and non-radiative Auger recombination, leads to fluorescence non-blinking which is observed in photocharged single graphene quantum dots (GQDs). This phenomenon can be explained in terms of different energy levels in the GQDs, caused by various oxygen-containing functional groups in the single GQDs. The suppressed blinking is due to the filling of trap sites owing to a Coulomb blockade. These results provide a profound understanding of the special optical properties of GQDs, affording a reference for further in-depth research.
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Affiliation(s)
- Wei Fu
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jiefu Yin
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Huaqiang Cao
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Zhongfu Zhou
- State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai, 200072, China
| | - Junying Zhang
- School of Physics, Beihang University, Beijing, 100191, China
| | - Jingjing Fu
- School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Jamie H Warner
- Department of Mechanical Engineering, The University of Texas at Austin, 204 East Dean Keeton Street, Austin, TX, 78712, USA
| | - Cheng Wang
- Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xiaofang Jia
- School of Physics, Beihang University, Beijing, 100191, China
| | - G Neville Greaves
- Department of Physics, Aberystwyth University, Aberystwyth, SY23 3BZ, UK
- Department of Materials Science and Metallurgy, The University of Cambridge, Cambridge, CB3 0FS, UK
| | - Anthony K Cheetham
- Department of Materials Science and Metallurgy, The University of Cambridge, Cambridge, CB3 0FS, UK
- Materials Research Laboratory, University of California, Santa Barbara, CA, 93106, USA
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2
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Xiang H, Valandro SR, Hill EH. Layered silicate edge-linked perylene diimides: Synthesis, self-assembly and energy transfer. J Colloid Interface Sci 2023; 629:300-306. [PMID: 36155925 DOI: 10.1016/j.jcis.2022.09.055] [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: 05/26/2022] [Revised: 09/02/2022] [Accepted: 09/11/2022] [Indexed: 11/16/2022]
Abstract
The control over intermolecular interactions between chromophores at nanomaterial interfaces is important for sensing and light-harvesting applications. To that aim, inorganic nanoparticles with anisotropic shape and surface chemistry can serve as useful supports for organic modification. Herein, novel asymmetric perylene diimides with aspartic acid and oleyl terminal groups were grafted to the edges of the layered silicate clay Laponite, a water-dispersible discoidal nanoparticle. The photophysical properties and solvent-dependent self-assembly of the nanoclay-grafted perylenes were investigated, revealing that the polarity of the terminating ligand dictates the aggregation behavior in aqueous solution, where increased water content generally led to the formation of perylene H-aggregates. The anionic basal surface of the nanoclay provided a binding site for a cationic fluorophore, leading to energy transfer from the face-bound donor to the edge-bound perylene acceptor. This study encourages further research on the use of functional ligands for the formation of organic-inorganic hybrids, particularly where inorganic template particles with specific surface chemistry can be exploited to study intermolecular interactions. Overall, these findings should advance further design and implementation of novel semiconducting ligands towards inorganic-organic hybrids, with potential applications in sensing and energy harvesting.
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Affiliation(s)
- Hongxiao Xiang
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - Silvano R Valandro
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging (CUI), Luruper Chausee 149, 22761 Hamburg, Germany
| | - Eric H Hill
- Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany; The Hamburg Center for Ultrafast Imaging (CUI), Luruper Chausee 149, 22761 Hamburg, Germany.
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3
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Krasnova IY, Antonov DY, Shapovalov AV, Shifrina ZB. Dendritic polyphenylene framework as a light-harvesting shell for highly emissive [2.2]Paracyclophane core. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Zhang Y, Zhou H, Wang X, Li X, Wei J, Qiao Y, Song Y, Gao B. Enhanced brightness and electron affinity of terrylenediimide with sulfone-bridged substituents on the bay region. Chem Commun (Camb) 2021; 57:651-654. [PMID: 33346268 DOI: 10.1039/d0cc06956f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Terrylenediimide with electron-withdrawing groups (TDI4SF) was synthesized by the attachment of sulfone substituents on the bay region of terrylenediimide. The electron-withdrawing sulfone groups enhance the electron affinity, reduce the LUMO level to -4.37 eV, and endow TDI with excellent anti-oxidation ability. With sulfone substituents, TDI4SF has a red-shifted emission maximum with a peak at 702 nm and high photoluminescence quantum yield.
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Affiliation(s)
- Yan Zhang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Huanying Zhou
- Tianjin Institute of Environmental and Operational Medicine, Tianjin 300050, P. R. China
| | - Xu Wang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Xinwei Li
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Juandi Wei
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Yanjun Qiao
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Yifang Song
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China.
| | - Baoxiang Gao
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei, China. and Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education), Hebei University, Baoding 071002, Hebei, China
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5
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Hammer BAG, Müllen K. Expanding the limits of synthetic macromolecular chemistry through Polyphenylene Dendrimers. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2018; 20:262. [PMID: 30363718 PMCID: PMC6182379 DOI: 10.1007/s11051-018-4364-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 08/17/2018] [Indexed: 06/08/2023]
Abstract
Polyphenylene dendrimers (PPDs) are a unique class of macromolecules because their backbone is made from twisted benzene repeat units that result in a rigid, shape-persistent architecture as reported by Hammer et al. (Chem Soc Rev 44:4072-4090, 2015) and Hammer and Müllen (Chem Rev 116:2103-210, 2016) These dendrimers can be synthetically tailored at their core, scaffold, and surface to introduce a wide range of chemical functionalities that influence their applications. It is the balance between the macromolecular properties of polyphenylene dendrimers with grandiose synthetic ingenuity that presents a template for the next generation of synthetic dendrimers to achieve complex structures other chemistry fields cannot. This perspective will look at how advances in synthetic chemistry have led to an explosion in the properties of polyphenylene dendrimers from their initial stage, as PPDs that were used as precursors for nanographenes, to next-generation dendrimers for organic electronic devices, sensors for volatile organic compounds (VOCs), nanocarriers for small molecules, and even as complexes with therapeutic drugs and viruses, among others. Ideally, this perspective will illustrate how the evolution of synthetic chemistry has influenced the possible structures and properties of PPDs and how these chemical modifications have opened the door to unprecedented applications.
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Affiliation(s)
- Brenton A. G. Hammer
- Department of Chemistry and Biochemistry, California State University Northridge, 18111 Nordhoff St. 91330, Northridge, CA USA
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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6
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Chen J, Vachon J, Feringa BL. Design, Synthesis, and Isomerization Studies of Light-Driven Molecular Motors for Single Molecular Imaging. J Org Chem 2018; 83:6025-6034. [PMID: 29741383 PMCID: PMC5987184 DOI: 10.1021/acs.joc.8b00654] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
![]()
The
design of a multicomponent system that aims at the direct visualization
of a synthetic rotary motor at the single molecule level on surfaces
is presented. The synthesis of two functional motors enabling photochemical
rotation and fluorescent detection is described. The light-driven
molecular motor is found to operate in the presence of a fluorescent
tag if a rigid long rod (32 Å) is installed between both photoactive
moieties. The photochemical isomerization and subsequent thermal helix
inversion steps are confirmed by 1H NMR and UV–vis
absorption spectroscopies. In addition, the tetra-acid functioned
motor can be successfully grafted onto amine-coated quartz and it
is shown that the light responsive rotary motion on surfaces is preserved.
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Affiliation(s)
- Jiawen Chen
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747AG Groningen , The Netherlands
| | - Jérôme Vachon
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747AG Groningen , The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry , University of Groningen , Nijenborgh 4 , 9747AG Groningen , The Netherlands
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7
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George L, Efimova E, Sariola-Leikas E, Lahtonen K, Valden M, Vivo P, Hakola H, Hiltunen A, Efimov A. Building Up Colors: Multilayered Arrays of Peryleneimides on Flat Surfaces and Mesoporous Layers. Chempluschem 2017; 82:705-715. [DOI: 10.1002/cplu.201700061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Lijo George
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Elena Efimova
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Essi Sariola-Leikas
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Kimmo Lahtonen
- Surface Science Group; Photonics Laboratory; Tampere University of Technology; P.O. Box 692 33101 Tampere Finland
| | - Mika Valden
- Surface Science Group; Photonics Laboratory; Tampere University of Technology; P.O. Box 692 33101 Tampere Finland
| | - Paola Vivo
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Hanna Hakola
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Arto Hiltunen
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
| | - Alexander Efimov
- Laboratory of Chemistry and Bioengineering; Tampere University of Technology; P.O. Box 541 33101 Tampere Finland
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8
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Zhang S, Zhou F, Peng H, Liu T, Ding L, Fang Y. Fabrication and humidity sensing performance studies of a fluorescent film based on a cholesteryl derivative of perylene bisimide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 165:145-149. [PMID: 27131145 DOI: 10.1016/j.saa.2016.04.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 04/07/2016] [Accepted: 04/09/2016] [Indexed: 06/05/2023]
Abstract
A fluorescent film based on a cholesteryl derivative of perylene bisimide (PTCDI-co-CholDEA) was fabricated via utilization of an electrostatic spinning technique on a glass plate surface. SEM studies revealed that the film was characterized by fibrous network structure. It is the structure and the chemical composition that make the fluorescence emission of the film sensitive to the variation of local environmental humidity. The sensitivity of the sensing is 0.1497 (×10(4)a.u. of the intensity)/1% RH, of which RH is the abbreviation of relative humidity. The maximum quenching efficiency of the film is 55.4% when humidity reaches 97% RH. Furthermore, the sensing process is fully reversible, and presence of other commonly found liquids shows little effect to the monitoring process.
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Affiliation(s)
| | - Feng Zhou
- Xi'an High Technique Institute, Xi'an 710025, China
| | - Haonan Peng
- Key Lab of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Taihong Liu
- Key Lab of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Liping Ding
- Key Lab of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Yu Fang
- Key Lab of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
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9
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Schleifenbaum F, Kern AM, Konrad A, Meixner AJ. Dynamic control of Förster energy transfer in a photonic environment. Phys Chem Chem Phys 2015; 16:12812-7. [PMID: 24840741 DOI: 10.1039/c4cp01306a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, the effect of modified optical density of states on the rate of Förster resonant energy transfer between two closely-spaced chromophores is investigated. A model based on a system of coupled rate equations is derived to predict the influence of the environment on the molecular system. Due to the near-field character of Förster transfer, the corresponding rate constant is shown to be nearly independent of the optical mode density. An optical resonator can, however, effectively modify the donor and acceptor populations, leading to a dramatic change in the Förster transfer rate. Single-molecule measurements on the autofluorescent protein DsRed using a λ/2-microresonator are presented and compared to the theoretical model's predictions. The observed resonator-induced dequenching of the donor subunit in DsRed is accurately reproduced by the model, allowing a direct measurement of the Förster transfer rate in this otherwise inseparable multichromophoric system. With this accurate yet simple theoretical framework, new experiments can be conceived to measure normally obscured energy transfer channels in complex coupled quantum systems, e.g. in photovoltaics or light harvesting complexes.
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Affiliation(s)
- Frank Schleifenbaum
- Universität Tübingen, Institut für Physikalische und Theoretische Chemie, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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10
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Synthesis, characterization, optical and electrochemical properties of a new chiral multichromophoric system based on perylene and naphthalene diimides. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2014.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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van der Velde JHM, Uusitalo JJ, Ugen LJ, Warszawik EM, Herrmann A, Marrink SJ, Cordes T. Intramolecular photostabilization via triplet-state quenching: design principles to make organic fluorophores “self-healing”. Faraday Discuss 2015; 184:221-35. [DOI: 10.1039/c5fd00114e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covalent linkage of fluorophores and photostabilizers was recently revived as a strategy to make organic fluorophores “self-healing” via triplet-state quenching. Although Lüttke and co-workers pioneered this strategy already in the 1980s, the general design principles still remain elusive. In this contribution, we combine experiments and theory to understand what determines the photostabilization efficiency in dye–photostabilizer conjugates. Our results from single-molecule microscopy and molecular dynamics simulations of different Cy5-derivatives suggest that the distance and relative geometry between the fluorophore and photostabilizer are more important than the chemical nature of the photostabilizer, e.g. its redox potential, which is known to influence electron-transfer rates. We hypothesize that the efficiency of photostabilization scales directly with the contact rate of the fluorophore and photostabilizer. This study represents an important step in the understanding of the molecular mechanism of intramolecular photostabilization and can pave the way for further development of stable emitters for various applications.
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Affiliation(s)
- Jasper H. M. van der Velde
- Molecular Microscopy Research Group & Single-molecule Biophysics
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Jaakko J. Uusitalo
- Groningen Biomolecular Sciences and Biotechnology Institute
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Lourens-Jan Ugen
- Molecular Microscopy Research Group & Single-molecule Biophysics
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Eliza M. Warszawik
- Department of Polymer Chemistry
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Andreas Herrmann
- Department of Polymer Chemistry
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Siewert J. Marrink
- Groningen Biomolecular Sciences and Biotechnology Institute
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Thorben Cordes
- Molecular Microscopy Research Group & Single-molecule Biophysics
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
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12
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Issac A, Hildner R, Hippius C, Würthner F, Köhler J. Stepwise decrease of fluorescence versus sequential photobleaching in a single multichromophoric system. ACS NANO 2014; 8:1708-1717. [PMID: 24444041 DOI: 10.1021/nn4060946] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
For individual molecules from the newly synthesized calix[4]arene tethered perylene bisimide (PBI) trimer, we studied the emitted fluorescence intensity as a function of time. Owing to the zigzag arrangement of PBI dyes in these trimers, the polarization state of the emission provides directly information about the emitting subunit within the trimer. Interestingly, we observed emission from all neutral subunits within a trimer rather than exclusively from the subunit with the lowest site energy. This can be understood in terms of thermally activated uphill energy transfer that repopulates the higher energetic chromophores. Together with the simultaneously recorded polarization-resolved emission spectra, this reveals that the emission from a multichromophoric system is governed by a complex interplay between the temporal variations of the photophysical parameters of the subunits, bidirectional hopping processes within the trimer, and unavoidable photobleaching. Moreover, it is demonstrated that the typically observed stepwise decrease of the signal from a multichromophoric system does not necessarily reflect sequential bleaching of the individual chromophores within the macromolecule.
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Affiliation(s)
- Abey Issac
- Experimental Physics IV and Bayreuth Institute for Macromolecular Research (BIMF), University of Bayreuth , 95440 Bayreuth, Germany
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13
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Binder K, Butt HJ, Floudas G, Frey H, Hsu HP, Landfester K, Kolb U, Kühnle A, Maskos M, Müllen K, Paul W, Schmidt M, Spiess HW, Virnau P. Structure Formation of Polymeric Building Blocks: Complex Polymer Architectures. FROM SINGLE MOLECULES TO NANOSCOPICALLY STRUCTURED MATERIALS 2013. [DOI: 10.1007/12_2013_230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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14
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Jang S, Cheng YC. Resonance energy flow dynamics of coherently delocalized excitons in biological and macromolecular systems: Recent theoretical advances and open issues. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2012. [DOI: 10.1002/wcms.1111] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Quartarolo AD, Chiodo SG, Russo N. A TDDFT investigation of bay substituted perylenediimides: Absorption and intersystem crossing. J Comput Chem 2012; 33:1091-100. [DOI: 10.1002/jcc.22914] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 11/30/2011] [Accepted: 11/30/2011] [Indexed: 01/24/2023]
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16
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Bahng HW, Yoon MC, Lee JE, Murase Y, Yoneda T, Shinokubo H, Osuka A, Kim D. Ensemble and Single-Molecule Spectroscopic Study on Excitation Energy Transfer Processes in 1,3-Phenylene-Linked Perylenebisimide Oligomers. J Phys Chem B 2012; 116:1244-55. [DOI: 10.1021/jp208855u] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Hee Won Bahng
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Min-Chul Yoon
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Ji-Eun Lee
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Yuichi Murase
- Department of Chemistry and Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tomoki Yoneda
- Department of Chemistry and Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Shinokubo
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan
| | - Atsuhiro Osuka
- Department of Chemistry and Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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17
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Nguyen TTT, Türp D, Wang D, Nölscher B, Laquai F, Müllen K. A Fluorescent, Shape-Persistent Dendritic Host with Photoswitchable Guest Encapsulation and Intramolecular Energy Transfer. J Am Chem Soc 2011; 133:11194-204. [DOI: 10.1021/ja2022398] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Thi-Thanh-Tam Nguyen
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - David Türp
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Dapeng Wang
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Belinda Nölscher
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Frédéric Laquai
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Klaus Müllen
- Max-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
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18
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Ren H, Li J, Wang R, Zhang T, Gao Z, Liu D. Synthesis and luminescent properties of perylene bisimide-cored dendrimers with carbazole surface groups. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.06.019] [Citation(s) in RCA: 18] [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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19
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Huang C, Barlow S, Marder SR. Perylene-3,4,9,10-tetracarboxylic Acid Diimides: Synthesis, Physical Properties, and Use in Organic Electronics. J Org Chem 2011; 76:2386-407. [DOI: 10.1021/jo2001963] [Citation(s) in RCA: 877] [Impact Index Per Article: 67.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Chun Huang
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Stephen Barlow
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Seth R. Marder
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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Fron E, Puhl L, Oesterling I, Li C, Müllen K, De Schryver FC, Hofkens J, Vosch T. Energy Transfer Pathways in a Rylene‐Based Triad. Chemphyschem 2010; 12:595-608. [DOI: 10.1002/cphc.201000665] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Indexed: 11/05/2022]
Affiliation(s)
- Eduard Fron
- Department of Chemistry and Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
| | - Larissa Puhl
- Max‐Planck‐Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz (Germany)
| | - Ingo Oesterling
- Max‐Planck‐Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz (Germany)
| | - Chen Li
- Max‐Planck‐Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz (Germany)
| | - Klaus Müllen
- Max‐Planck‐Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz (Germany)
| | - Frans C. De Schryver
- Department of Chemistry and Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
| | - Johan Hofkens
- Department of Chemistry and Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
| | - Tom Vosch
- Nano‐Science Center, Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen (Denmark), Fax: (+45) 353‐20‐322
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Weil T, Vosch T, Hofkens J, Peneva K, Müllen K. Rylenfarbstoffe als maßgeschneiderte Nanoemitter für die Photonik. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200902532] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Weil T, Vosch T, Hofkens J, Peneva K, Müllen K. The Rylene Colorant Family-Tailored Nanoemitters for Photonics Research and Applications. Angew Chem Int Ed Engl 2010; 49:9068-93. [DOI: 10.1002/anie.200902532] [Citation(s) in RCA: 520] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li WS, Teng MJ, Jia XR, Wei Y. Continuous intra- and intermolecular energy transfer in light-harvesting gels from natural amino acids-based dendrons. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Salavagione HJ, Martínez G, Gómez R, Segura JL. Synthesis of water-soluble perylenediimide-functionalized polymer through esterification with poly(vinyl alcohol). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24142] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Li CS, Tsai YH, Lee WC, Kuo WJ. Synthesis and Photophysical Properties of Pyrrole/Polycyclic Aromatic Units Hybrid Fluorophores. J Org Chem 2010; 75:4004-13. [DOI: 10.1021/jo100158a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chang-Shun Li
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, Taiwan 811
| | - Ya-Hsuan Tsai
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, Taiwan 811
| | - Wei-Chen Lee
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, Taiwan 811
| | - Wen-Jang Kuo
- Department of Applied Chemistry, National University of Kaohsiung, Kaohsiung, Taiwan 811
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Zeng Y, Li YY, Chen J, Yang G, Li Y. Dendrimers: A Mimic Natural Light-Harvesting System. Chem Asian J 2010; 5:992-1005. [DOI: 10.1002/asia.200900653] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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García-Moreno I, Costela A, Pintado-Sierra M, Martín V, Sastre R. Enhanced laser action of Perylene-Red doped polymeric materials. OPTICS EXPRESS 2009; 17:12777-12784. [PMID: 19654683 DOI: 10.1364/oe.17.012777] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The laser action of Perylene-Red doped in linear, crosslinked, fluorinated and sililated polymeric materials is reported. The purity of dye was found to be a key factor to enhance its solid-state laser behaviour. The samples were transversely pumped at 532 nm, with 5.5 mJ/pulse and 10 Hz repetition rate. Perylene-Red doped copolymers of methyl methacrylate with a 10 vol% proportion of 2,2,2-trifluoroethyl-methacrylate exhibited a lasing efficiency of 26% with a high photostability since the dye laser output remained at the same level after 100,000 pump pulses in the same position of the sample. This lasing behaviour is, to the best of our knowledge, the highest achieved to date for organic, inorganic, and hybrid materials doped with Perylene-Red.
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Affiliation(s)
- I García-Moreno
- Instituto de Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain.
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Zhao Y, Zhang X, Li D, Liu D, Jiang W, Han C, Shi Z. Water-soluble 3,4:9,10-perylene tetracarboxylic ammonium as a high-performance fluorochrome for living cells staining. LUMINESCENCE 2009; 24:140-3. [DOI: 10.1002/bio.1078] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nantalaksakul A, Mueller A, Klaikherd A, Bardeen CJ, Thayumanavan S. Dendritic and Linear Macromolecular Architectures for Photovoltaics: A Photoinduced Charge Transfer Investigation. J Am Chem Soc 2009; 131:2727-38. [DOI: 10.1021/ja809194u] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arpornrat Nantalaksakul
- Departments of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, and University of California, Riverside, California 92521
| | - Astrid Mueller
- Departments of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, and University of California, Riverside, California 92521
| | - Akamol Klaikherd
- Departments of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, and University of California, Riverside, California 92521
| | - Christopher J. Bardeen
- Departments of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, and University of California, Riverside, California 92521
| | - S. Thayumanavan
- Departments of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, and University of California, Riverside, California 92521
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Peralta S, Habib-Jiwan JL, Jonas AM. Ordered Polyelectrolyte Multilayers: Unidirectional FRET Cascade in Nanocompartmentalized Polyelectrolyte Multilayers. Chemphyschem 2009; 10:137-43. [DOI: 10.1002/cphc.200800443] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Photoinduced energy transfer in bichromophoric co-assemblies based on amphiphilic poly(amidoamine) dendrons. J Colloid Interface Sci 2008; 324:225-9. [DOI: 10.1016/j.jcis.2008.04.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2007] [Revised: 04/09/2008] [Accepted: 04/10/2008] [Indexed: 11/19/2022]
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Newkome GR, Shreiner CD. Poly(amidoamine), polypropylenimine, and related dendrimers and dendrons possessing different 1→2 branching motifs: An overview of the divergent procedures. POLYMER 2008. [DOI: 10.1016/j.polymer.2007.10.021] [Citation(s) in RCA: 313] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Abstract
Energy is the most important issue of the 21st century. About 85% of our energy comes from fossil fuels, a finite resource unevenly distributed beneath the Earth's surface. Reserves of fossil fuels are progressively decreasing, and their continued use produces harmful effects such as pollution that threatens human health and greenhouse gases associated with global warming. Prompt global action to solve the energy crisis is therefore needed. To pursue such an action, we are urged to save energy and to use energy in more efficient ways, but we are also forced to find alternative energy sources, the most convenient of which is solar energy for several reasons. The sun continuously provides the Earth with a huge amount of energy, fairly distributed all over the world. Its enormous potential as a clean, abundant, and economical energy source, however, cannot be exploited unless it is converted into useful forms of energy. This Review starts with a brief description of the mechanism at the basis of the natural photosynthesis and, then, reports the results obtained so far in the field of photochemical conversion of solar energy. The "grand challenge" for chemists is to find a convenient means for artificial conversion of solar energy into fuels. If chemists succeed to create an artificial photosynthetic process, "... life and civilization will continue as long as the sun shines!", as the Italian scientist Giacomo Ciamician forecast almost one hundred years ago.
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Affiliation(s)
- Vincenzo Balzani
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, Via Selmi 2 40126 Bologna, Italy.
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Jang S. Generalization of the Förster resonance energy transfer theory for quantum mechanical modulation of the donor-acceptor coupling. J Chem Phys 2007; 127:174710. [DOI: 10.1063/1.2779031] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Brocorens P, Lazzaroni R, Brédas JL. Molecular modeling simulations of the morphology of polyphenylene dendrimers. J Phys Chem B 2007; 111:9218-27. [PMID: 17637050 DOI: 10.1021/jp068868k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three polyphenylene dendrimers were studied by molecular modeling techniques with the goal of better defining the notion of shape persistence often associated with these molecules. We show that despite the rigidity of the monomers, a large variety of dendrimer morphologies is accessible, in large part due to the asymmetrical branching pattern of the monomers (they have nodes in meta and para positions with respect to their anchor point). The folding ability of a branch depends on the number and sequence of the meta and para nodes it contains: while some of the branches are always straight, others can fold back, and the amplitude of that folding increases with generation. As a result, the range of accessible morphologies increases with the generation, from a dense-shell model in low generation to a model intermediate between a dense shell and a dense core in high generation. When the typical A2B monomer is replaced by an A4B monomer, the dense packing limit is reached as early as the second generation because of a higher density and the presence of nodes in the ortho position, which are oriented backward.
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Affiliation(s)
- Patrick Brocorens
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, Place du Parc, 20, B-7000 Mons, Belgium.
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Gómez R, Veldman D, Blanco R, Seoane C, Segura JL, Janssen RAJ. Energy and Electron Transfer in a Poly(fluorene-alt-phenylene) Bearing Perylenediimides as Pendant Electron Acceptor Groups. Macromolecules 2007. [DOI: 10.1021/ma070026b] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rafael Gómez
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Dirk Veldman
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Raúl Blanco
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Carlos Seoane
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - José L. Segura
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - René A. J. Janssen
- Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madrid, E-28040, Madrid, Spain, and Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Melnikov SM, Yeow EKL, Uji-i H, Cotlet M, Müllen K, De Schryver FC, Enderlein J, Hofkens J. Origin of Simultaneous Donor−Acceptor Emission in Single Molecules of Peryleneimide−Terrylenediimide Labeled Polyphenylene Dendrimers. J Phys Chem B 2007; 111:708-19. [PMID: 17249814 DOI: 10.1021/jp0655625] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Förster type resonance energy transfer (FRET) in donor-acceptor peryleneimide-terrylenediimide dendrimers has been examined at the single molecule level. Very efficient energy transfer between the donor and the acceptor prevent the detection of donor emission before photobleaching of the acceptor. Indeed, in solution, on exciting the donor, only acceptor emission is detected. However, at the single molecule level, an important fraction of the investigated individual molecules (about 10-15%) show simultaneous emission from both donor and acceptor chromophores. The effect becomes apparent mostly after photobleaching of the majority of donors. Single molecule photon flux correlation measurements in combination with computer simulations and a variety of excitation conditions were used to determine the contribution of an exciton blockade to this two-color emission. Two-color defocused wide-field imaging showed that the two-color emission goes hand in hand with an unfavorable orientation between one of the donors and the acceptor chromophore.
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Affiliation(s)
- Sergey M Melnikov
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Belgium
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Chen J, Zhang L, Li S, Li YY, Chen J, Yang G, Li Y. Valence isomerization in dendrimers by photo-induced electron transfer and energy transfer from the dendrimer backbone to the core. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.05.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Wu CW, Lin HC. H-Bonded Effects on Novel Supramolecular Dendrimers Containing Electron-Transporting Donor Dendrons and Single/Double H-Bonded Acceptor Emitters. Macromolecules 2006. [DOI: 10.1021/ma0610358] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chung-Wen Wu
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan (ROC)
| | - Hong-Cheu Lin
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan (ROC)
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Xu XH, Fu XG, Wu LZ, Chen B, Zhang LP, Tung CH, Ji HF, Schanze KS, Zhang RQ. Intramolecular Triplet Energy Transfer in Donor–Acceptor Molecules Linked by a Crown Ether Bridge. Chemistry 2006; 12:5238-45. [PMID: 16607672 DOI: 10.1002/chem.200501151] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Bichromophoric compounds BP-C-NP and BP-C-NBD were synthesized with benzophenone chromophore (BP) as the donor, and 2-naphthyl (NP) and norbornadiene group (NBD) as the acceptor, respectively. Their intramolecular triplet energy transfer was examined. The bridges linking the donor and acceptors in these molecules involve a crown ether moiety complexing a sodium ion. Phosphorescence quenching, flash photolysis and photosensitized isomerization experiments indicate that intramolecular triplet energy transfer occurs with rate constants of about 3.3 x 10(5) and 4.8 x 10(5) s(-1) and efficiencies of about 33 and 42 % for BP-C-NP and BP-C-NBD, respectively. Theoretical calculations indicate that these molecules adopt conformations below room temperature which allow their two-end chromophores conducive to through-space energy transfer.
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Affiliation(s)
- Xiao-He Xu
- Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, PR China
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Photophysical and photochemical studies on bis(Dendron) poly(aryl ether) dendrimers: Intramolecular triplet energy transfer in poly(aryl ether) dendrimers via a folded conformation. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Petrella A, Cremer J, De Cola L, Bäuerle P, Williams RM. Charge transfer processes in conjugated triarylamine-oligothiophene-perylenemonoimide dendrimers. J Phys Chem A 2006; 109:11687-95. [PMID: 16366618 DOI: 10.1021/jp0510995] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and charge transfer properties of triarylamine-oligothiophene-perylenemonoimide dendrimers, TPA(T2-PMI)3 and TPA(T4-PMI)3, are described. The fluorescence quantum yields indicate strong emission quenching by electron transfer [phi(THF) = 0.004 for TPA(T2-PMI)3, phi(THF) = 0.003 for TPA(T4-PMI)3, and phi(THF) = 0.8 for PMI]. Moreover, with the increase of the solvent polarity, the quantum yields decrease indicating that the A+* D-* (acceptor/donor) couple is more stabilized. The femtosecond transient absorption spectra show a very fast charge separation process (approximately 2 ps; k(cs) approximately 5 x 10(11) s(-1)) and a charge recombination of more than 1 order of magnitude slower (approximately 50 ps; k(cr) approximately 2 x 10(10) s(-1)), as observed from the rise time and decay of the radical anion and radical cation absorption bands. The analysis of the transient absorption spectroscopy and of the energetics of the process using Marcus theory indicates that in the electron transfer process the thiophene unit is the first electron donor. The triarylamine is not functioning as a second electron donor, as also substantiated by the absence of an effect of the addition of acid on the emission intensity of the dendrimers. The presence of the triarylamine and/or the proximity of the oligothiophenes does improve the donor capabilities of the oligothiophene unit slightly and enhances its conjugation as seen in the absorption spectra and the transients of the radial cations. These results can be used for a better design of molecular materials for, e.g., photovoltaic applications.
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Affiliation(s)
- Andrea Petrella
- Molecular Photonic Materials, van 't Hoff Institute for Molecular Sciences, Universiteit van Amsterdam, Nieuwe Achtergracht 166, 1018 WS Amsterdam, The Netherlands
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Grey JK, Kim DY, Donley CL, Miller WL, Kim JS, Silva C, Friend RH, Barbara PF. Effect of Temperature and Chain Length on the Bimodal Emission Properties of Single Polyfluorene Copolymer Molecules. J Phys Chem B 2006; 110:18898-903. [PMID: 16986881 DOI: 10.1021/jp057361r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fluorescence emission spectra were recorded for isolated polymer chains of the polyfluorene copolymer, F8BT [poly(9,9-di-n-octylfluorene-alt-benzothiadiazole)], at 298 and 20 K for two molecular weights (chain lengths). For long-chain F8BT at 298 K, the observed distribution of single-molecule emission maxima G(Emax) is bimodal, with peaks at approximately 2.35 eV ("blue") and approximately 2.25 eV ("red"). Previously, the red forms have been assigned to polymer chains that possess intrachain contacts, which lowers the local singlet exciton energy. At approximately 20 K, G(Emax) collapses into a single broad distribution centered at approximately 2.3 eV for long-chain F8BT. However, this distribution can be further divided into a high-energy edge that is dominated by the "blue" form, while the remainder of the distribution is composed of the "red" form. Low-molecular-weight F8BT samples emit exclusively from the blue form, and no shift in peak maxima with low temperature was observed. A Franck-Condon analysis reveals a decrease in emitting state displacements between spectra measured at 298 and 20 K, suggesting that temperature-induced structural displacements are responsible for the change in the bimodal emission.
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Affiliation(s)
- John K Grey
- Center for Nano and Molecular Science and Technology and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712, USA
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Chen J, Chen J, Li S, Zhang L, Yang G, Li Y. Conversion of Intramolecular Singlet Electron Transfer at Room Temperature into Triplet Energy Transfer at 77 K: Photoisomerization in Norbornadiene- and Carbazole-Labeled Poly(aryl ether) Dendrimers. J Phys Chem B 2006; 110:4663-70. [PMID: 16526699 DOI: 10.1021/jp057002w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of Fréchet-type poly(aryl ether) dendrimers (CZ-Gn-NBD, n = 1-3) with carbazole (CZ) chromophores and a norbornadiene (NBD) group attached to the periphery and the core, respectively, were synthesized, and their photophysical and photochemical properties were investigated. Selective excitation of the carbazole units in CZ-Gn-NBD resulted in a singlet electron transfer from CZ to NBD at room temperature, and an intersystem crossing followed a triplet-triplet energy transfer from CZ to NBD in glassy 2-methyltetrahydrofuran at 77 K. Both singlet electron transfer and triplet energy transfer processes lead to the isomerization of the norbornadiene group into the quadricyclane (CZ-Gn-QC). The efficiencies and the rate constants for singlet electron transfer are approximately 88, 80, and 74% and 1.8 x 10(9), 6.1 x 10(8), and 4.0 x 10(8) s(-1) for generations 1-3, respectively. The quantum yields of the intramolecular photosensitized isomerization are measured to be approximately 0.013, 0.012, and 0.011, and the efficiencies of triplet norbornadiene formation via singlet electron transfer are approximately 0.070, 0.065, and 0.059 for generations 1-3, respectively. The light-harvesting ability of CZ-Gn-NBD increases with the generation due to an increase of the number of peripheral chromophores. In glassy 2-methyltetrahydrofuran at 77 K, the triplet-triplet energy transfer proceeds with efficiencies of approximately 0.86, 0.64, and 0.36 and rate constants of 0.96, 0.25, and 0.08 s(-1) for generations 1-3, respectively. The intramolecular singlet electron transfer and triplet energy transfer in CZ-Gn-NBD proceed mainly via a through-space mechanism involving the proximate donor (folding back conformation) and acceptor groups.
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Affiliation(s)
- Jie Chen
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China
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Chen J, Li S, Zhang L, Li YY, Chen J, Yang G, Li Y. Direct Observation of the Intramolecular Triplet−Triplet Energy Transfer in Poly(aryl ether) Dendrimers. J Phys Chem B 2006; 110:4047-53. [PMID: 16509695 DOI: 10.1021/jp055845h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of benzophenone (BP) and naphthalene (NA) labeled poly(aryl ether) dendrimers (BP-Gn-NA), generations 1-4, were synthesized, and their photophysical properties were examined. Flash photolysis demonstrates that the triplet energy in BP-Gn-NA can be transferred from the peripheral BP chromophores to the core NA group with the efficiencies of ca. 0.97, 0.96, 0.88, and 0.54 and with the rate constants of 1.4x10(8), 1.2x10(8), 9.5x10(7), and 1.3x10(7) s-1 at room temperature for generations 1-4, respectively. The transient absorption spectra of BP-Gn-NA show clearly the formation of the triplet NA absorption along with the decay of the triplet BP one with an isosbestic point at 475 nm, which gives direct evidence of the triplet energy transfer from the periphery BP chromphores to the core NA group. The phosphorescence of the NA group attached to the focal point was observed when the periphery BP chromophores were selectively irradiated in BP-G1-NA at 77 K. The triplet energy transfer occurs at 77 K with the efficiencies of 1.0, 0.16, 0.17, and 0.21 for generations 1-4, respectively. The intramolecular triplet energy transfer is proposed to proceed mainly via a through space mechanism.
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Affiliation(s)
- Jinping Chen
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China
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Nantalaksakul A, Reddy DR, Bardeen CJ, Thayumanavan S. Light harvesting dendrimers. PHOTOSYNTHESIS RESEARCH 2006; 87:133-50. [PMID: 16408144 DOI: 10.1007/s11120-005-8387-3] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Accepted: 06/02/2005] [Indexed: 05/06/2023]
Abstract
Tree-like dendrimers with decreasing number of chromophores from periphery to core is an attractive candidate for light-harvesting applications. Numerous dendritic designs with different kinds of light-collecting chromophores at periphery and an energy-sink at the core have been demonstrated with high energy transfer efficiency. These building blocks are now being developed for several applications such as light-emitting diodes, frequency converters and other photonic devices. This review outlines the efforts that are based on both conjugated and non-conjugated dendrimers.
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Magbitang T, Lee VY, Cha JN, Wang HL, Chung WR, Miller RD, Dubois G, Volksen W, Kim HC, Hedrick JL. Oriented Nanoporous Lamellar Organosilicates Templated from Topologically Unsymmetrical Dendritic-Linear Block Copolymers. Angew Chem Int Ed Engl 2005; 44:7574-80. [PMID: 16247813 DOI: 10.1002/anie.200501577] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Teddie Magbitang
- IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA
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