1
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Fischermeier D, Turkin A, Selby J, Lambert C, Mitrić R. Simulation of exciton spectra in disordered supramolecular polymers: exciton localization in cisoid indolenine squaraine hexamers. Phys Chem Chem Phys 2023; 26:219-229. [PMID: 38055887 DOI: 10.1039/d3cp04557a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
In order to understand the effects of disorder and defects in oligomers and polymers on the localization of excitons, we investigated the spectral properties of the squaraine B hexamer using long range corrected tight-binding TDDFT (lc-TDDFTB) and Frenkel-exciton model based calculations. Employing classical molecular dynamics, the cisoid indolenine squaraine hexamers helix was propagated in DCM and acetone to obtain ensembles of realistic structures, which naturally exhibit considerable disorder. The trajectories together with several model squaraine systems were studied to show the profound effects of disorder in the superstructure and disorder of the local monomer geometry on optical properties like absorption and exciton localization. We further compared lc-TDDFTB and exciton theory derived spectral data to related experimental data on absorption, exciton transfer and localization in squaraine polymers and oligomers.
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Affiliation(s)
- David Fischermeier
- Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany.
| | - Arthur Turkin
- Institut für Organische Chemie, Universitüt Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Joshua Selby
- Institut für Organische Chemie, Universitüt Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Christoph Lambert
- Institut für Organische Chemie, Universitüt Würzburg, Am Hubland, D-97074 Würzburg, Germany.
- Center for Nanosystems Chemistry, Universität Würzburg, Theodor-Boveri-Weg, D-97074 Würzburg, Germany
| | - Roland Mitrić
- Institut für Physikalische und Theoretische Chemie, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany.
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2
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Hu D, Peng J, Chen L, Gelin MF, Lan Z. Spectral Fingerprint of Excited-State Energy Transfer in Dendrimers through Polarization-Sensitive Transient-Absorption Pump-Probe Signals: On-the-Fly Nonadiabatic Dynamics Simulations. J Phys Chem Lett 2021; 12:9710-9719. [PMID: 34590858 DOI: 10.1021/acs.jpclett.1c02640] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The time-resolved polarization-sensitive transient-absorption (TA) pump-probe (PP) spectra are simulated using on-the-fly surface-hopping nonadiabatic dynamics and the doorway-window representation of nonlinear spectroscopy. A dendrimer model system composed of two linear phenylene ethynylene units (2-ring and 3-ring) is taken as an example. The ground-state bleach (GSB), stimulated emission (SE), and excited-state absorption (ESA) contributions as well as the total TA PP signals are obtained and carefully analyzed. It is shown that intramolecular excited-state energy transfer from the 2-ring unit to the 3-ring unit can be conveniently identified by employing pump and probe pulses with different polarizations. Our results demonstrate that time-resolved polarization-sensitive TA PP signals provide a powerful tool for the elucidation of excited-state energy-transfer pathways, notably in molecular systems possessing several optically bright nonadiabatically coupled electronic states with different orientations of transition dipole moments.
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Affiliation(s)
- Deping Hu
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China
- School of Environment, South China Normal University, Guangzhou 510006, China
| | - Jiawei Peng
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China
- School of Environment, South China Normal University, Guangzhou 510006, China
| | - Lipeng Chen
- Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - Maxim F Gelin
- School of Sciences, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Zhenggang Lan
- SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou 510006, China
- School of Environment, South China Normal University, Guangzhou 510006, China
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3
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Sterzenbach C, Keller TJ, Kraus D, Lupton JM, Jester SS, Höger S. Expanded all-phenylene molecular spoked wheels: cutouts of graphenylene-3. Org Chem Front 2021. [DOI: 10.1039/d1qo00876e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
All-phenylene molecular spoked wheels, cutouts of graphenylene-3, have been synthesized by intramolecular Yamamoto coupling of the respective dodecabromides.
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Affiliation(s)
- Christopher Sterzenbach
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - Tristan J. Keller
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - Daniel Kraus
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - John M. Lupton
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Stefan-S. Jester
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - Sigurd Höger
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
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4
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Li Y, Wang H, Li X. Over one century after discovery: pyrylium salt chemistry emerging as a powerful approach for the construction of complex macrocycles and metallo-supramolecules. Chem Sci 2020; 11:12249-12268. [PMID: 34123226 PMCID: PMC8163312 DOI: 10.1039/d0sc04585c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 10/13/2020] [Indexed: 11/21/2022] Open
Abstract
Over one century after its discovery, pyrylium salt chemistry has been extensively applied in preparing light emitters, photocatalysts, and sensitizers. In most of these studies, pyrylium salts acted as versatile precursors for the preparation of small molecules (such as furan, pyridines, phosphines, pyridinium salts, thiopyryliums and betaine dyes) and poly(pyridinium salt)s. In recent decades, pyrylium salt chemistry has emerged as a powerful approach for constructing complex macrocycles and metallo-supramolecules. In this perspective, we attempt to summarize the representative efforts of synthesizing and self-assembling large, complex architectures using pyrylium salt chemistry. We believe that this perspective not only highlights the recent achievements in pyrylium salt chemistry, but also inspires us to revisit this chemistry to design and construct macrocycles and metallo-supramolecules with increasing complexity and desired function.
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Affiliation(s)
- Yiming Li
- College of Chemistry and Environmental Engineering, Shenzhen University Shenzhen 518055 China
- Department of Chemistry, University of South Florida Tampa Florida 33620 USA
| | - Heng Wang
- College of Chemistry and Environmental Engineering, Shenzhen University Shenzhen 518055 China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University Shenzhen 518055 China
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5
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Surya SG, Khatoon S, Ait Lahcen A, Nguyen ATH, Dzantiev BB, Tarannum N, Salama KN. A chitosan gold nanoparticles molecularly imprinted polymer based ciprofloxacin sensor. RSC Adv 2020; 10:12823-12832. [PMID: 35492136 PMCID: PMC9051084 DOI: 10.1039/d0ra01838d] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 03/10/2020] [Indexed: 01/21/2023] Open
Abstract
In this work, we present a novel study on the development of an electrochemical biomimetic sensor to detect the ciprofloxacin (CIP) antibiotic. A chitosan gold nanoparticles decorated molecularly imprinted polymer (Ch-AuMIP) was used to modify the glassy carbon electrode (GCE) for preparation of the sensor. The Ch-AuMIP was characterized to understand various properties like chemical composition, morphology, roughness, and conduction using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), atomic force microscopy (AFM) and cyclic voltammetry (CV) respectively. Several experimental conditions affecting the Ch-AuMIP/GCE sensor such as the CIP removal agent, the extraction time, the volume of Ch-AuMIP drop-cast onto GCE and the rebinding time were studied and optimized. The Ch-AuMIP sensor sensitivity was studied in the concentration range of 1-100 μmol L-1 exhibiting a limit of detection of 210 nmol L-1. The synergistic combination of Au nanoparticles and Ch-MIP helps detect the CIP antibiotic with good sensitivity and selectivity, respectively. We investigated the selectivity aspect by using some possible interfering species and the developed sensing system showed good selectivity for CIP with a 66% response compared to the other compounds (≤45% response). The proposed sensing strategy showed its applicability for successful detection of CIP in real samples like tap water, mineral water, milk, and pharmaceutical formulation. The developed sensor showed good selectivity towards CIP even among the analogue molecules of Norfloxacin (NFX) and Ofloxacin (OFX). The developed sensor was successfully applied to determine the CIP in different samples with a satisfactory recovery in the range of 94 to 106%.
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Affiliation(s)
- Sandeep G Surya
- Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) Saudi Arabia
| | - Shahjadi Khatoon
- Department of Chemistry, Chaudhary Charan Singh University Meerut 250004 India
| | - Abdellatif Ait Lahcen
- Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) Saudi Arabia
| | - An T H Nguyen
- Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) Saudi Arabia
| | - Boris B Dzantiev
- A. N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences Moscow Russia ,sa
| | - Nazia Tarannum
- Department of Chemistry, Chaudhary Charan Singh University Meerut 250004 India
| | - Khaled N Salama
- Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) Saudi Arabia
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6
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Wilhelm P, Vogelsang J, Schönfelder N, Höger S, Lupton JM. Anomalous Linear Dichroism in Bent Chromophores of π-conjugated Polymers: Departure from the Franck-Condon Principle. PHYSICAL REVIEW LETTERS 2019; 122:057402. [PMID: 30821996 DOI: 10.1103/physrevlett.122.057402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Indexed: 06/09/2023]
Abstract
We examine the influence of bending of π-conjugated chromophores on photoluminescence (PL) by spectrally resolving the depolarization of fluorescence on the single-molecule level. The effect of excited-state mixing mediated by molecular vibrations is manifested in the departure from the usual achromatic linear dichroism of fluorescence, with the polarization anisotropy decreasing in the vibronic progression. Bent chromophores reveal an overall increase in vibronic PL intensity with polarization orthogonal to the molecular long axis. This manifestation of the Renner-Herzberg-Teller (RHT) effect illustrates the breakdown of the Franck-Condon principle in macromolecules used in organic electronics, providing information on the orientation of transition-dipole moments and the origin of spectral broadening. While some of the spectral signatures of the RHT effect appear similar to those of H aggregation in molecular dimers, discrimination between the two phenomena is straightforward since H aggregation does not induce anomalous linear dichroism.
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Affiliation(s)
- P Wilhelm
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - J Vogelsang
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - N Schönfelder
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - S Höger
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - J M Lupton
- Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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7
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Alfonso Hernandez L, Nelson T, Gelin MF, Lupton JM, Tretiak S, Fernandez-Alberti S. Interference of Interchromophoric Energy-Transfer Pathways in π-Conjugated Macrocycles. J Phys Chem Lett 2016; 7:4936-4944. [PMID: 27934058 DOI: 10.1021/acs.jpclett.6b02236] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The interchromophoric energy-transfer pathways between weakly coupled units in a π-conjugated phenylene-ethynylene macrocycle and its half-ring analogue have been investigated using the nonadiabatic excited-state molecular dynamics approach. To track the flow of electronic transition density between macrocycle units, we formulate a transition density flux analysis adapted from the statistical minimum flow method previously developed to investigate vibrational energy flow. Following photoexcitation, transition density is primarily delocalized on two chromophore units and the system undergoes ultrafast energy transfer, creating a localized excited state on a single unit. In the macrocycle, distinct chromophore units donate transition density to a single acceptor unit but do not interchange transition density among each other. We find that energy transfer in the macrocycle is slower than in the corresponding half ring because of the presence of multiple interfering energy-transfer pathways. Simulation results are validated by modeling the fluorescence anisotropy decay.
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Affiliation(s)
| | - Tammie Nelson
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Maxim F Gelin
- Department of Chemistry, Technische Universität München , D-85747 Garching, Germany
| | - John M Lupton
- Institut für Angewandte und Experimentelle Physik, Universität Regensburg , Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
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8
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Park KH, Cho JW, Kim TW, Shimizu H, Nakao K, Iyoda M, Kim D. Defining Cyclic-Acyclic Exciton Transition at the Single-Molecule Level: Size-Dependent Conformational Heterogeneity and Exciton Delocalization in Ethynylene-Bridged Cyclic Oligothiophenes. J Phys Chem Lett 2016; 7:1260-1266. [PMID: 26983838 DOI: 10.1021/acs.jpclett.6b00360] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Conformational disorder in π-conjugated cyclic systems plays a crucial role in controlling the extent of exciton delocalization in much the same way as that in linear counterparts. However, to date, there have been no detailed spectroscopic investigations on the nature of excitons in π-conjugated cyclic systems at the single-molecule level. Herein, we studied the effect of conformational disorder on the excitonic behaviors of cyclic oligothiophenes composed of 6, 8, 10, and 12 subunits (C-6T, C-8T, C-10T, and C-12T, respectively) by employing single-molecule fluorescence spectroscopy. We found that, due to the cyclic symmetry constraint which suppresses S1-S0 transition, small and rigid C-6T and C-8T exhibit extremely long fluorescence lifetimes, while short lifetimes typical of linear systems are dominant in large, flexible C-10T and C-12T. Two-dimensional correlation maps between fluorescence lifetimes and spectral positions show that, by torsional defects created through continued photoexcitation, fully delocalized cyclic excitons shrink to form acyclic excitons in the case of C-10T, while localized acyclic excitons from initial states are maintained in the case of C-12T. The distribution of linear dichroism values from C-6T to C-10T gradually broadens but narrows in C-12T, suggesting a cyclic-to-acyclic transition in excitonic nature between C-10T and C-12T.
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Affiliation(s)
- Kyu Hyung Park
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 03722, Korea
| | - Jae-Won Cho
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 03722, Korea
| | - Tae-Woo Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 03722, Korea
| | - Hideyuki Shimizu
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Kazumi Nakao
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Masahiko Iyoda
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University , Hachioji, Tokyo 192-0397, Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 03722, Korea
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9
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Thiessen A, Würsch D, Jester SS, Aggarwal AV, Idelson A, Bange S, Vogelsang J, Höger S, Lupton JM. Exciton Localization in Extended π-Electron Systems: Comparison of Linear and Cyclic Structures. J Phys Chem B 2015; 119:9949-58. [DOI: 10.1021/acs.jpcb.5b02091] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Thiessen
- Department
of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
| | - Dominik Würsch
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Stefan-S. Jester
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - A. Vikas Aggarwal
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Alissa Idelson
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Sebastian Bange
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Jan Vogelsang
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
| | - Sigurd Höger
- Kekulé-Institut
für Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - John M. Lupton
- Department
of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
- Institut
für Experimentelle und Angewandte Physik, Universität Regensburg, 93040 Regensburg, Germany
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10
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Lambert C, Koch F, Völker SF, Schmiedel A, Holzapfel M, Humeniuk A, Röhr MIS, Mitric R, Brixner T. Energy Transfer Between Squaraine Polymer Sections: From Helix to Zigzag and All the Way Back. J Am Chem Soc 2015; 137:7851-61. [DOI: 10.1021/jacs.5b03644] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christoph Lambert
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Federico Koch
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Sebastian F. Völker
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Alexander Schmiedel
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Marco Holzapfel
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Alexander Humeniuk
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Merle I. S. Röhr
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Roland Mitric
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Tobias Brixner
- Institut
für Organische Chemie, ‡Center for Nanosystems Chemistry
(CNC), and §Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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11
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Zhang L, Li J, Zeng Y, Meng L, Fu C. Highly Selective Molecularly Imprinted Polymer Sensor for Indium Detection Based on Recognition of In-Alizarin Complexes. ELECTROANAL 2015. [DOI: 10.1002/elan.201400654] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Inouye M, Abe H, Ohishi Y. A New Class of Structurally Simple and Highly Emissive Fluorophores with a Pyridine–Acetylene–Phenol Conjugate. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)51] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Molecularly imprinted polymer based on multiwalled carbon nanotubes for ribavirin recognition. JOURNAL OF POLYMER RESEARCH 2012. [DOI: 10.1007/s10965-012-9942-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Liu S, Schmitz D, Jester SS, Borys NJ, Höger S, Lupton JM. Coherent and Incoherent Interactions between Cofacial Π-Conjugated Oligomer Dimers in Macrocycle Templates. J Phys Chem B 2012; 117:4197-203. [DOI: 10.1021/jp301903u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Su Liu
- Department of Physics & Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
| | - Daniela Schmitz
- Kekulé-Institut für
Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Stefan-S. Jester
- Kekulé-Institut für
Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - Nicholas J. Borys
- Department of Physics & Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
| | - Sigurd Höger
- Kekulé-Institut für
Organische Chemie und Biochemie der Universität Bonn, 53121 Bonn, Germany
| | - John M. Lupton
- Department of Physics & Astronomy, University of Utah, Salt Lake City, Utah 84112, United States
- Institut für Experimentelle
und Angewandte Physik, Universität Regensburg, 93053 Regensburg, Germany
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15
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Darling SB, Sternberg M. Importance of side chains and backbone length in defect modeling of poly(3-alkylthiophenes). J Phys Chem B 2009; 113:6215-8. [PMID: 19290596 DOI: 10.1021/jp808045j] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Geometric defects in conjugated polymers play a critical role in determining electronic structure and properties such as charge carrier mobility and band gap. Because the relative roles of individual defects are experimentally difficult to discern, computational approaches provide valuable insight if appropriate molecular models are used. Poly(3-alkylthiophenes) are often modeled with very short backbones and without their side chains. We demonstrate the shortcomings of this approach for modeling torsional disorder in poly(3-hexylthiophene) (P3HT). Using a hybrid density functional model, we identify a minimal acceptable model to comprise approximately 10 monomers with explicitly treated alkane side chains. Potential applications of this work extend to polymer electronics and optoelectronics.
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Affiliation(s)
- Seth B Darling
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.
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