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He H, Lee YJ, Zong Z, Liu N, Lynch VM, Kim J, Oh J, Kim D, Sessler JL, Ke XS. Nanographene-Fused Expanded Carbaporphyrin Tweezers. J Am Chem Soc 2024; 146:543-551. [PMID: 38147538 DOI: 10.1021/jacs.3c10122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
A nanographene-fused expanded carbaporphyrin (5) and its BF2 complex (6) were synthesized. Single-crystal X-ray structures revealed that 5 and 6 are connected by two hexa-peri-hexabenzocoronene (HBC) units and two dipyrromethene or BODIPY units, respectively. As prepared, 5 and 6 both show nonaromatic character with figure-of-eight carbaoctaphyrin (1.1.1.0.1.1.1.0) cores and adopt tweezers-like conformations characterized by a partially confined space between the two constituent HBC units. The distance between the HBC centers is >10 Å, while the dihedral angles between the two HBC planes are 30.5 and 35.2° for 5 and 6, respectively. The interactions between 5 and 6 and fullerene C60 were studied both in organic media and in the solid state. Proton NMR spectral titrations of 5 and 6 with C60 revealed a 1:1 binding mode for both macrocycles. In toluene-d8, the corresponding binding constants were determined to be 1141 ± 17 and 994 ± 10 M-1 for 5 and 6, respectively. Single-crystal X-ray diffraction structural analyses confirmed the formation of 1:1 fullerene inclusion complexes in the solid state. The C60 guests in both complexes are found within triangular pockets composed of two HBC units from the tweezers-like receptor most closely associated with the bound fullerene, as well as an HBC unit from an adjacent host. Femtosecond transient absorption measurements revealed subpicosecond ultrafast charge separation between 5 (and 6) and C60 in the complexes. To the best of our knowledge, the present report provides the first example wherein a nanographene building block is incorporated into the core of a porphyrinic framework.
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Affiliation(s)
- Haodan He
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yu Jin Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Zhaohui Zong
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ningchao Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Vincent M Lynch
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Jinseok Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Juwon Oh
- Department of Chemistry, Soonchunhyang University, Asan 31538, Korea
| | - Dongho Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Jonathan L Sessler
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Xian-Sheng Ke
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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2
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Follana-Berná J, Dawson A, Kaswan RR, Seetharaman S, Karr PA, Sastre-Santos Á, D'Souza F. π-Extended Pyrazinepyrene-Fused Zinc Phthalocyanines: Synthesis and Excited-State Charge Separation Involving Coordinated C 60. J Phys Chem A 2023. [PMID: 37467488 DOI: 10.1021/acs.jpca.3c02738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
A series of pyrazinepyrene-fused zinc phthalocyanines (ZnPc-Pyrn) have been newly synthesized by reacting quinoxaline and the corresponding diamino-functionalized phthalocyanines as a new class of π-extended phthalocyanine systems. Bathochromically shifted absorption as a function of the number of pyrazinepyrene entities due to extended π-conjugation and quenched fluorescence due to the presence of fused pyrazinepyrene were witnessed. The electronic structures of these phthalocyanines were probed by systematic computational and electrochemical studies, while the excited-state properties were examined by pump-probe spectroscopies operating at the femto- and nanosecond time scales. Similar to the excited singlet lifetimes, the excited triplet states also revealed diminished lifetimes with an increased number of pyrazinepyrene entities. Further, the coordinatively unsaturated zinc in these molecules was coordinated with phenyl imidazole-functionalized fullerene, ImC60, to form a new series of donor-acceptor conjugates. Upon full characterization of these conjugates, the occurrence of excited-state charge separation was established by transient pump-probe spectroscopy, covering wide temporal and spatial regions. The lifetime of the final charge-separated states was ∼2 ns and decreased with an increase in the number of fused pyrazinepyrene units.
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Affiliation(s)
- Jorge Follana-Berná
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, Avda. de la Universidad s/n, 03202 Elche, Spain
| | - Andrew Dawson
- Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Ram R Kaswan
- Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Sairaman Seetharaman
- Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Paul A Karr
- Department of Physical Sciences and Mathematics, Wayne State College, 1111 Main Street, Wayne, Nebraska 68787, United States
| | - Ángela Sastre-Santos
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, Avda. de la Universidad s/n, 03202 Elche, Spain
| | - Francis D'Souza
- Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
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Moss A, Jang Y, Arvidson J, Wang H, D'Souza F. Highly Coupled Heterobicycle-Fused Porphyrin Dimers: Excitonic Coupling and Charge Separation with Coordinated Fullerene, C 60. CHEMSUSCHEM 2023; 16:e202202289. [PMID: 36655889 DOI: 10.1002/cssc.202202289] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/18/2023] [Indexed: 06/17/2023]
Abstract
Porphyrin dimers have been widely explored and studied owing to their importance in photosynthetic systems. A vast variety of dimers linked by different groups and at different angles have been synthesized and studied; however, the means by which to synthesize rigidly fused porphyrins with direct conjugation of the chromophores remains limited. Such a class of porphyrins may possess interesting properties that unconjugated or stacked dimers may not exhibit. In this study, bisbenzimidazole-fused porphyrin dimers and their mono- and bis-zinc derivatives are synthesized and characterized. As a consequence of excitonic coupling, these dimers exhibit a split Soret band irrespective of the metal ion in the porphyrin cavity. Steady-state fluorescence and excitation spectra followed by femtosecond transient absorption spectral studies of the heterometallated dimer, (free-base and zinc porphyrin) reveals the occurrence of efficient singlet-singlet energy transfer (>95 % efficiency and rate constant >1012 s-1 ) within the dyad. Further, donor-acceptor conjugates were formed by metal-ligand axial coordination of phenyl imidazole functionalized C60 and were characterized by a variety of physicochemical techniques. Excited state charge separation from both singlet and triplet excited states of ZnP in the conjugates has been established. The lifetime of the final charge-separated state was in the 30-40 μs range revealing charge stabilization. Interestingly, no charge separation in the conjugate derived from the heterometallated dimer was observed wherein excitation transfer dominated the process. The present study brings out the importance of the rigid π-spacer connecting porphyrin dimers in governing the energy and electron transfer events when coupled with an electron acceptor.
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Affiliation(s)
- Austen Moss
- Department of Chemistry, University of North Texas, Denton, TX, 76203, USA
| | - Youngwoo Jang
- Department of Chemistry, University of North Texas, Denton, TX, 76203, USA
| | - Jacob Arvidson
- Department of Chemistry, University of North Texas, Denton, TX, 76203, USA
| | - Hong Wang
- Department of Chemistry, University of North Texas, Denton, TX, 76203, USA
| | - Francis D'Souza
- Department of Chemistry, University of North Texas, Denton, TX, 76203, USA
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4
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Kuznetsov AE. Review of research of nanocomposites based on graphene quantum dots. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2019-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Graphene quantum dots (GQDs) belong to the vast and versatile family of carbon nanomaterials. Their unique position amongst versatile carbon nanoparticles (NPs) originates from the properties of quantum confinement and edge effects. GQDs are similar to conventional semiconductor QDs due to their tunable band gaps and high photoluminescence activity. However, GQDs have superior characteristics due to their excellent biocompatibility, low toxicity, good water dispersibility, large optical absorptivity, high fluorescence activity and photostability. These properties have generated significant interest in GQDs applications in various fields: nanosensor fabrication, drug delivery, photocatalysis, photovoltaics, and photodynamic therapy. Numerous GQD-based nanocomposites/nanohybrides have been synthesized and/or studied computationally. This review focuses on recent computational studies of various GQD-based nanocomposites/nanohybrides and systems which can be related to them.
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Affiliation(s)
- Aleksey E. Kuznetsov
- Department of Chemistry , Universidad Tecnica Federico Santa Maria , Santiago , Chile
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Hölzel H, Haines P, Kaur R, Lungerich D, Jux N, Guldi DM. Probing Charge Management across the π-Systems of Nanographenes in Regioisomeric Electron Donor-Acceptor Architectures. J Am Chem Soc 2022; 144:8977-8986. [PMID: 35543627 DOI: 10.1021/jacs.2c00456] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inspired by light-induced processes in nature to mimic the primary events in the photosynthetic reaction centers, novel functional materials combine electron donors and acceptors, i.e., (metallo)porphyrins (ZnP) and fullerenes (C60), respectively, with emerging materials, i.e., nanographenes. We utilized hexa-peri-hexabenzocoronene (HBC) due to its versatility regarding functionalization and physicochemical properties, to construct three regioisomeric ZnP-HBC-C60 conjugates, which foster geometrical diversity by arranging ZnP and C60 in ortho-, meta-, and para-positions to each other. The corresponding hexaarylbenzene (HAB) motifs, with an interrupted π-system, were also prepared. Transient absorption measurements disclosed the fast population of charge transfer as well as singlet and triplet charge-separated states. With the help of density functional theory (DFT) calculations, we further conceive the communication across the HBCs and HABs. This work reveals the impact of both the geometrical arrangement with respect to through-space versus through-bond interactions and the structural rigidity/flexibility on the charge management across the different π-systems.
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Affiliation(s)
- Helen Hölzel
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 412 96 Gothenburg, Sweden.,Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM) Chair of Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Philipp Haines
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM) Chair of Physical Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Ramandeep Kaur
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM) Chair of Physical Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Dominik Lungerich
- Center for Nanomedicine, Institute for Basic Science (IBS), 50 Yonsei-ro, Seodaemun-gu, 03722 Seoul, Republic of Korea.,Graduate Program of Nano Biomedical Engineering (NanoBME), Advanced Science Institute, Yonsei University, 03722 Seoul, Republic of Korea
| | - Norbert Jux
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM) Chair of Organic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM) Chair of Physical Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
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Drummer MC, Singh V, Gupta N, Gesiorski JL, Weerasooriya RB, Glusac KD. Photophysics of nanographenes: from polycyclic aromatic hydrocarbons to graphene nanoribbons. PHOTOSYNTHESIS RESEARCH 2022; 151:163-184. [PMID: 33963981 DOI: 10.1007/s11120-021-00838-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Graphene quantum dots (GQDs) and nanoribbons (GNRs) are classes of nanographene molecules that exhibit highly tunable photophysical properties. There have been great strides in recent years to advance our understanding of nanographene photophysics and develop their use in light-harvesting systems, such as artificial photosynthesis. Here, we review the latest studies of GQDs and GNRs which have shed new light onto their photophysical underpinnings through computational and advanced spectroscopic techniques. We discuss how the size, symmetry, and shape of nanographenes influence their molecular orbital structures and, consequentially, their spectroscopic signatures. The scope of this review is to comprehensively lay out the general photophysics of nanographenes starting with benzene and building up to larger polycyclic aromatic hydrocarbons, GQDs, and GNRs. We also explore a collection of publications from recent years that build upon the current understanding of nanographene photophysics and their potential application in light-driven processes from display, lasing, and sensing technology to photocatalytic water splitting.
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Affiliation(s)
- Matthew C Drummer
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Varun Singh
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Nikita Gupta
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Jonathan L Gesiorski
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Ravindra B Weerasooriya
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Ksenija D Glusac
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, IL, 60607, USA.
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA.
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Hexabenzocoronene functionalized with antiaromatic S- and Se-core-modified porphyrins (isophlorins): comparison with the dyad with regular porphyrin. PURE APPL CHEM 2022. [DOI: 10.1515/pac-2021-1105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The important and perspective molecular building blocks composed of hexaphenylbenzenes (HPBs) or their oxidized derivatives, hexa-peri-hexabenzocoronenes (HBCs), and metalloporphyrins have recently received significant attention of the researchers. In this study, motivated by recent findings, we have addressed the modifications of structures and properties of HBC-porphyrin compounds by using instead of aromatic porphyrins antiaromatic 20π isophlorin derivatives of thiophene or selenophene. We have reported the first comparative computational investigation of the following systems: (i) HBC with one non-metallated aromatic porphyrin, P(N4H2), unit, HBC-P(N4H2), (ii) HBC with one S-core-modified antiaromatic porphyrin (S-isophlorin), PS4, unit, HBC-PS4, and (iii) HBC with one Se-core-modified antiaromatic porphyrin (Se-isophlorin), PSe4, unit, HBC-PSe4. The study has been done employing the B3LYP/6-31G* approach (in the gas phase and in the implicit solvents, benzene and dichloromethane), and comparison with the B3LYP/6-31G** and B3LYP/6-311G* approaches was performed, where relevant. The effects of the core-modified antiaromatic isophlorins on the structures, electronic, and other properties, potentially including reactivity, of the whole building block HBC-isophlorin have been shown to be quite pronounced and to be noticeably stronger than the effects of the original aromatic non-metallated porphyrin. Thus, we have demonstrated theoretically that the complete porphyrin core-modification with other elements, this time with S and Se leading to the formation of the antiaromatic isophlorins, should be considered as a promising way for modifying and tuning structures, electronic properties and reactivity of the hexabenzocoronene-porphyrin(s) building blocks.
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Grau BW, Dill M, Hampel F, Kahnt A, Jux N, Tsogoeva SB. Four‐Step Domino Reaction Enables Fully Controlled Non‐Statistical Synthesis of Hexaarylbenzene with Six Different Aryl Groups**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104437] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Benedikt W. Grau
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University of Erlangen-Nürnberg Nikolaus Fiebiger-Straße 10 91058 Erlangen Germany
| | - Maximilian Dill
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University of Erlangen-Nürnberg Nikolaus Fiebiger-Straße 10 91058 Erlangen Germany
| | - Frank Hampel
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University of Erlangen-Nürnberg Nikolaus Fiebiger-Straße 10 91058 Erlangen Germany
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM) Permoserstr. 15 04318 Leipzig Germany
| | - Norbert Jux
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University of Erlangen-Nürnberg Nikolaus Fiebiger-Straße 10 91058 Erlangen Germany
| | - Svetlana B. Tsogoeva
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander University of Erlangen-Nürnberg Nikolaus Fiebiger-Straße 10 91058 Erlangen Germany
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Grau BW, Dill M, Hampel F, Kahnt A, Jux N, Tsogoeva SB. Four-Step Domino Reaction Enables Fully Controlled Non-Statistical Synthesis of Hexaarylbenzene with Six Different Aryl Groups*. Angew Chem Int Ed Engl 2021; 60:22307-22314. [PMID: 34060211 PMCID: PMC8518863 DOI: 10.1002/anie.202104437] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/30/2021] [Indexed: 12/11/2022]
Abstract
Hexaarylbenzene (HAB) derivatives are versatile aromatic systems playing a significant role as chromophores, liquid crystalline materials, molecular receptors, molecular-scale devices, organic light-emitting diodes and candidates for organic electronics. Statistical synthesis of simple symmetrical HABs is known via cyclotrimerization or Diels-Alder reactions. By contrast, the synthesis of more complex, asymmetrical systems, and without involvement of statistical steps, remains an unsolved problem. Here we present a generally applicable synthetic strategy to access asymmetrical HAB via an atom-economical and high-yielding metal-free four-step domino reaction using nitrostyrenes and α,α-dicyanoolefins as easily available starting materials. Resulting domino product-functionalized triarylbenzene (TAB)-can be used as a key starting compound to furnish asymmetrically substituted hexaarylbenzenes in high overall yield and without involvement of statistical steps. This straightforward domino process represents a distinct approach to create diverse and still unexplored HAB scaffolds, containing six different aromatic rings around central benzene core.
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Affiliation(s)
- Benedikt W. Grau
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander University of Erlangen-NürnbergNikolaus Fiebiger-Straße 1091058ErlangenGermany
| | - Maximilian Dill
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander University of Erlangen-NürnbergNikolaus Fiebiger-Straße 1091058ErlangenGermany
| | - Frank Hampel
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander University of Erlangen-NürnbergNikolaus Fiebiger-Straße 1091058ErlangenGermany
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM)Permoserstr. 1504318LeipzigGermany
| | - Norbert Jux
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander University of Erlangen-NürnbergNikolaus Fiebiger-Straße 1091058ErlangenGermany
| | - Svetlana B. Tsogoeva
- Organic Chemistry Chair I and Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander University of Erlangen-NürnbergNikolaus Fiebiger-Straße 1091058ErlangenGermany
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10
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Reger D, Schöll K, Hampel F, Maid H, Jux N. Pyridinic Nanographenes by Novel Precursor Design. Chemistry 2021; 27:1984-1989. [PMID: 33225488 PMCID: PMC7898602 DOI: 10.1002/chem.202004983] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Indexed: 01/24/2023]
Abstract
In this work we present the solution‐synthesis of pyridine analogues to hexa‐peri‐hexabenzocoronene (HBC)—which might be called superpyridines—via a novel precursor design. The key step in our strategy was the pre‐formation of the C−C bonds between the 3/3’ positions of the pyridine and the adjacent phenyl rings—bonds that are otherwise unreactive and difficult to close under Scholl‐conditions. Apart from the synthesis of the parent compound we show that classical pyridine chemistry, namely oxidation, N‐alkylation and metal‐coordination is applicable to the π‐extended analogue. Furthermore, we present basic physical chemical characterizations of the newly synthesized molecules. With this novel synthetic strategy, we hope to unlock the pyridine chemistry of nanographenes.
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Affiliation(s)
- David Reger
- Department of Chemistry and Pharmacy &, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nuremberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany
| | - Kilian Schöll
- Department of Chemistry and Pharmacy &, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nuremberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany
| | - Frank Hampel
- Department of Chemistry and Pharmacy &, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nuremberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany
| | - Harald Maid
- Department of Chemistry and Pharmacy &, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nuremberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany
| | - Norbert Jux
- Department of Chemistry and Pharmacy &, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nuremberg, Nikolaus-Fiebiger-Strasse 10, 91058, Erlangen, Germany
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11
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Hexabenzocoronene functionalized with porphyrin and P-core-modified porphyrin: A comparative computational study. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Singh V, Gupta N, Hargenrader GN, Askins EJ, Valentine AJS, Kumar G, Mara MW, Agarwal N, Li X, Chen LX, Cordones AA, Glusac KD. Photophysics of graphene quantum dot assemblies with axially coordinated cobaloxime catalysts. J Chem Phys 2020; 153:124903. [PMID: 33003752 DOI: 10.1063/5.0018581] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report a study of chromophore-catalyst assemblies composed of light harvesting hexabenzocoronene (HBC) chromophores axially coordinated to two cobaloxime complexes. The chromophore-catalyst assemblies were prepared using bottom-up synthetic methodology and characterized using solid-state NMR, IR, and x-ray absorption spectroscopy. Detailed steady-state and time-resolved laser spectroscopy was utilized to identify the photophysical properties of the assemblies, coupled with time-dependent DFT calculations to characterize the relevant excited states. The HBC chromophores tend to assemble into aggregates that exhibit high exciton diffusion length (D = 18.5 molecule2/ps), indicating that over 50 chromophores can be sampled within their excited state lifetime. We find that the axial coordination of cobaloximes leads to a significant reduction in the excited state lifetime of the HBC moiety, and this finding was discussed in terms of possible electron and energy transfer pathways. By comparing the experimental quenching rate constant (1.0 × 109 s-1) with the rate constant estimates for Marcus electron transfer (5.7 × 108 s-1) and Förster/Dexter energy transfers (8.1 × 106 s-1 and 1.0 × 1010 s-1), we conclude that both Dexter energy and Marcus electron transfer process are possible deactivation pathways in CoQD-A. No charge transfer or energy transfer intermediate was detected in transient absorption spectroscopy, indicating fast, subpicosecond return to the ground state. These results provide important insights into the factors that control the photophysical properties of photocatalytic chromophore-catalyst assemblies.
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Affiliation(s)
- Varun Singh
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor Street, Chicago, Illinois 60607, USA
| | - Nikita Gupta
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor Street, Chicago, Illinois 60607, USA
| | - George N Hargenrader
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor Street, Chicago, Illinois 60607, USA
| | - Erik J Askins
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor Street, Chicago, Illinois 60607, USA
| | - Andrew J S Valentine
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA
| | - Gaurav Kumar
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Michael W Mara
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Ave., Lemont, Illinois 60439, USA
| | - Neeraj Agarwal
- School of Chemical Sciences, UM DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina, Santacruz (E), Mumbai 400098, India
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA
| | - Lin X Chen
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Ave., Lemont, Illinois 60439, USA
| | - Amy A Cordones
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Ksenija D Glusac
- Department of Chemistry, University of Illinois at Chicago, 845 W Taylor Street, Chicago, Illinois 60607, USA
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13
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Ruppel M, Gazetas L, Lungerich D, Jux N. Synthesis and Photophysical Properties of Hexabenzocoronene‐Tetrabenzoporphyrin Architectures. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000860] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Michael Ruppel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich‐Alexander University Erlangen‐Nuremberg Nikolaus‐Fiebiger‐Str. 10 91058 Erlangen Germany
| | - Lampros‐Pascal Gazetas
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich‐Alexander University Erlangen‐Nuremberg Nikolaus‐Fiebiger‐Str. 10 91058 Erlangen Germany
| | - Dominik Lungerich
- Institute for Basic Science (IBS), 50 Yonsei‐ro, Seodaemun‐gu Center for Nanomedicine 03722 Seoul Republic of Korea
- Graduate Program of Nano Biomedical Engineering (NanoBME) Advanced Science Institute Yonsei University 03722 Seoul Republic of Korea
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich‐Alexander University Erlangen‐Nuremberg Nikolaus‐Fiebiger‐Str. 10 91058 Erlangen Germany
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14
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Cacioppo M, Scharl T, Đorđević L, Cadranel A, Arcudi F, Guldi DM, Prato M. Symmetry-Breaking Charge-Transfer Chromophore Interactions Supported by Carbon Nanodots. Angew Chem Int Ed Engl 2020; 59:12779-12784. [PMID: 32282973 PMCID: PMC7496469 DOI: 10.1002/anie.202004638] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 11/10/2022]
Abstract
Carbon dots (CDs) and their derivatives are useful platforms for studying electron-donor/acceptor interactions and dynamics therein. Herein, we couple amorphous CDs with phthalocyanines (Pcs) that act as electron donors with a large extended π-surface and intense absorption across the visible range of the solar spectrum. Investigations of the intercomponent interactions by means of steady-state and pump-probe transient absorption spectroscopy reveal symmetry-breaking charge transfer/separation and recombination dynamics within pairs of phthalocyanines. The CDs facilitate the electronic interactions between the phthalocyanines. Thus, our findings suggest that CDs could be used to support electronic couplings in multichromophoric systems and further increase their applicability in organic electronics, photonics, and artificial photosynthesis.
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Affiliation(s)
- Michele Cacioppo
- Department of Chemical and Pharmaceutical SciencesUniversity of Trieste, and INSTM, unit of TriesteVia Licio Giorgieri 134127TriesteItaly
| | - Tobias Scharl
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular MaterialsFriedrich-Alexander Universität Erlangen-NürnbergEgerlandstrasse 391058ErlangenGermany
| | - Luka Đorđević
- Department of Chemical and Pharmaceutical SciencesUniversity of Trieste, and INSTM, unit of TriesteVia Licio Giorgieri 134127TriesteItaly
- Present address: Department of ChemistryNorthwestern University2145 Sheridan RoadEvanstonIL60208USA
- Present address: Simpson Querrey InstituteNorthwestern University303 E. SuperiorChicagoIL60611USA
| | - Alejandro Cadranel
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular MaterialsFriedrich-Alexander Universität Erlangen-NürnbergEgerlandstrasse 391058ErlangenGermany
- Universidad de Buenos AiresFacultad de Ciencias Exactas y NaturalesDepartamento de Química Inorgánica, Analítica y Química FísicaPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
- CONICET—Universidad de Buenos AiresInstituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE)Pabellón 2, Ciudad UniversitariaC1428EHA BuenosAiresArgentina
| | - Francesca Arcudi
- Department of Chemical and Pharmaceutical SciencesUniversity of Trieste, and INSTM, unit of TriesteVia Licio Giorgieri 134127TriesteItaly
- Present address: Department of ChemistryNorthwestern University2145 Sheridan RoadEvanstonIL60208USA
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular MaterialsFriedrich-Alexander Universität Erlangen-NürnbergEgerlandstrasse 391058ErlangenGermany
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical SciencesUniversity of Trieste, and INSTM, unit of TriesteVia Licio Giorgieri 134127TriesteItaly
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE)Basque Research and Technology Alliance (BRTA)Paseo de Miramon 18220014Donostia San SebastiánSpain
- Basque Foundation for ScienceIkerbasqueBilbao48013Spain
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15
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Cacioppo M, Scharl T, Đorđević L, Cadranel A, Arcudi F, Guldi DM, Prato M. Symmetry‐Breaking Charge‐Transfer Chromophore Interactions Supported by Carbon Nanodots. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michele Cacioppo
- Department of Chemical and Pharmaceutical Sciences University of Trieste, and INSTM, unit of Trieste Via Licio Giorgieri 1 34127 Trieste Italy
| | - Tobias Scharl
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials Friedrich-Alexander Universität Erlangen-Nürnberg Egerlandstrasse 3 91058 Erlangen Germany
| | - Luka Đorđević
- Department of Chemical and Pharmaceutical Sciences University of Trieste, and INSTM, unit of Trieste Via Licio Giorgieri 1 34127 Trieste Italy
- Present address: Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Present address: Simpson Querrey Institute Northwestern University 303 E. Superior Chicago IL 60611 USA
| | - Alejandro Cadranel
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials Friedrich-Alexander Universität Erlangen-Nürnberg Egerlandstrasse 3 91058 Erlangen Germany
- Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales Departamento de Química Inorgánica, Analítica y Química Física Pabellón 2, Ciudad Universitaria C1428EHA Buenos Aires Argentina
- CONICET— Universidad de Buenos Aires Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) Pabellón 2, Ciudad Universitaria C1428EHA Buenos Aires Argentina
| | - Francesca Arcudi
- Department of Chemical and Pharmaceutical Sciences University of Trieste, and INSTM, unit of Trieste Via Licio Giorgieri 1 34127 Trieste Italy
- Present address: Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials Friedrich-Alexander Universität Erlangen-Nürnberg Egerlandstrasse 3 91058 Erlangen Germany
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences University of Trieste, and INSTM, unit of Trieste Via Licio Giorgieri 1 34127 Trieste Italy
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE) Basque Research and Technology Alliance (BRTA) Paseo de Miramon 182 20014 Donostia San Sebastián Spain
- Basque Foundation for Science Ikerbasque Bilbao 48013 Spain
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16
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Castro-Fernández S, Cruz CM, Mariz IFA, Márquez IR, Jiménez VG, Palomino-Ruiz L, Cuerva JM, Maçôas E, Campaña AG. Two-Photon Absorption Enhancement by the Inclusion of a Tropone Ring in Distorted Nanographene Ribbons. Angew Chem Int Ed Engl 2020; 59:7139-7145. [PMID: 32159924 DOI: 10.1002/anie.202000105] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/10/2020] [Indexed: 11/05/2022]
Abstract
A new family of distorted ribbon-shaped nanographenes was designed, synthesized, and their optical and electrochemical properties were evaluated, pointing out an unprecedented correlation between their structural characteristics and the two-photon absorption (TPA) responses and electrochemical band gaps. Three nanographene ribbons have been prepared: a seven-membered-ring-containing nanographene presenting a tropone moiety at the edge, its full-carbon analogue, and a purely hexagonal one. We have found that the TPA cross-sections and the electrochemical band gaps of the seven-membered-ring-containing compounds are higher and lower, respectively, than those of the fully hexagonal polycyclic aromatic hydrocarbon (PAH). Interestingly, the inclusion of additional curvature has a positive effect in terms of non-linear optical properties of those ribbons.
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Affiliation(s)
- Silvia Castro-Fernández
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Carlos M Cruz
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Inês F A Mariz
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001, Lisboa, Portugal
| | - Irene R Márquez
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Vicente G Jiménez
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Lucía Palomino-Ruiz
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Juan M Cuerva
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
| | - Ermelinda Maçôas
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001, Lisboa, Portugal
| | - Araceli G Campaña
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente, Universidad de Granada, Avda. Fuentenueva, s/n, 18071, Granada, Spain
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17
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Castro‐Fernández S, Cruz CM, Mariz IFA, Márquez IR, Jiménez VG, Palomino‐Ruiz L, Cuerva JM, Maçôas E, Campaña AG. Two‐Photon Absorption Enhancement by the Inclusion of a Tropone Ring in Distorted Nanographene Ribbons. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000105] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Silvia Castro‐Fernández
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Carlos M. Cruz
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Inês F. A. Mariz
- Centro de Química Estrutural Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais, 1 1049-001 Lisboa Portugal
| | - Irene R. Márquez
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Vicente G. Jiménez
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Lucía Palomino‐Ruiz
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Juan M. Cuerva
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
| | - Ermelinda Maçôas
- Centro de Química Estrutural Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais, 1 1049-001 Lisboa Portugal
| | - Araceli G. Campaña
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente Universidad de Granada Avda. Fuentenueva, s/n 18071 Granada Spain
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18
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Umeyama T, Igarashi K, Sasada D, Tamai Y, Ishida K, Koganezawa T, Ohtani S, Tanaka K, Ohkita H, Imahori H. Efficient light-harvesting, energy migration, and charge transfer by nanographene-based nonfullerene small-molecule acceptors exhibiting unusually long excited-state lifetime in the film state. Chem Sci 2020; 11:3250-3257. [PMID: 34122832 PMCID: PMC8157473 DOI: 10.1039/c9sc06456g] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electron-acceptor small-molecules possessing a long exciton lifetime and a narrow energy band gap, opposing the energy gap law, are highly desirable for high-performance organic photovoltaics (OPVs) by realizing their efficient light-harvesting ability (LH), exciton diffusion (ED), and charge transfer (CT). Toward this goal, we designed an acceptor–donor–acceptor (A–D–A) type nonfullerene acceptor (NFA), TACIC, having an electron-donating, self-assembling two-dimensional (2D) nanographene unit, thienoazacoronene, at the center with electron-withdrawing groups at both ends. The TACIC film exhibited a narrow band gap (1.59 eV) with excellent LH. Surprisingly, the TACIC film showed an extremely long exciton lifetime (1.59 ns), suppressing undesirable nonradiative decay by its unique self-assembling behavior. When combined with a conjugated polymer donor, PBDB-T, slow ED and CT were observed (60 ps) with the excitation of TACIC owing to the large TACIC domain sizes. Nevertheless, the unusually high efficiencies of ED and CT (96% in total) were achieved by the long TACIC exciton lifetime. Additionally, unusual energy transfer (EnT) from the excited PBDB-T to TACIC was seen, demonstrating its dual LH role. The OPV device with PBDB-T and TACIC showed a high incident photon-to-current efficiency (IPCE) exceeding 70% at up to 710 nm and a power conversion efficiency of ∼10%. This result will open up avenues for a rational strategy of OPVs where LH, ED, and CT from the acceptor side as well as LH, EnT, ED, and CT from the donor side can be better designed by using 2D nanographene as a promising building block for high-performance A–D–A type NFAs. A nonfullerene acceptor, TACIC, showed efficient light-harvesting, exciton diffusion, and charge transfer.![]()
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Affiliation(s)
- Tomokazu Umeyama
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Kensho Igarashi
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Daiki Sasada
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Yasunari Tamai
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan .,Japan Science and Technology Agency (JST), PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Keiichi Ishida
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Tomoyuki Koganezawa
- Japan Synchrotron Radiation Research Institute 1-1-1, Kouto, Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Shunsuke Ohtani
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Hideo Ohkita
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Hiroshi Imahori
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Nishikyo-ku Kyoto 615-8510 Japan .,Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University Sakyo-ku Kyoto 606-8501 Japan
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19
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Lewtak JP, Koszarna B, Charyton MK, Gryko DT. Extending a porphyrin chromophore via fusion with naphthalene. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An intramolecular oxidative aromatic coupling of meso-substituted porphyrins bearing electron-rich aromatics was the focus of investigation. The formation of C–C bond at [Formula: see text]-position for macrocycles bearing dimethoxynaphthalene moiety was achieved. It was established that Fe(ClO[Formula: see text]O induced only single cyclodehydrogenation whereas Fe(OTf)[Formula: see text] had the ability to remove four hydrogens and four electrons forming doubly-fused porphyrin. Both Fe(ClO[Formula: see text]O and Fe(OTf)[Formula: see text] were confirmed superior to FeCl[Formula: see text] as they ensured efficient oxidation process without concomitant chlorination of the products. We have proven that the trans-A[Formula: see text]B[Formula: see text]-porphyrin with two indole moieties do not form any stable products under such reaction conditions. The single fusion with dimethoxynaphthalene moiety has a comparable effect on absorption spectra [Formula: see text]. the Q-band of Ni-complexes is shifted to 650 nm. The Ni-porphyrin fused with two naphthalene units had bathochromically shifted Q-bands to 733 nm.
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Affiliation(s)
- Jan P. Lewtak
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Central University of Technology, Free State, Dept. of Life Sciences, Bloemfontein 9300, South Africa
| | - Beata Koszarna
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Marek K. Charyton
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Daniel T. Gryko
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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20
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Li Y, Li X, Xu Y. Theoretical insights into the effect of pristine, doped and hole graphene on the overall performance of dye-sensitized solar cells. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01264h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Graphene, a promising two-dimensional carbon material, has been extensively employed in dye-sensitized solar cells (DSSCs) with encouraging results.
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Affiliation(s)
- Yuanchao Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- State Key Lab of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
| | - Xin Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- State Key Lab of Urban Water Resource and Environment
- Harbin Institute of Technology
- Harbin 150090
| | - Yanling Xu
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin 150090
- China
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21
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Martin MM, Lungerich D, Hampel F, Langer J, Ronson TK, Jux N. Multiple-Porphyrin Functionalized Hexabenzocoronenes. Chemistry 2019; 25:15083-15090. [PMID: 31429504 PMCID: PMC6899994 DOI: 10.1002/chem.201903113] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Indexed: 11/23/2022]
Abstract
Porphyrin-hexabenzocoronene architectures serve as good model compounds to study light-harvesting systems. Herein, the synthesis of porphyrin functionalized hexa-peri-hexabenzocoronenes (HBCs), in which one or more porphyrins are covalently linked to a central HBC core, is presented. A series of hexaphenylbenzenes (HPBs) was prepared and reacted under oxidative coupling conditions. The transformation to the respective HBC derivatives worked well with mono- and tri-porphyrin-substituted HPBs. However, if more porphyrins are attached to the HPB core, Scholl oxidations are hampered or completely suppressed. Hence, a change of the synthetic strategy was necessary to first preform the HBC core, followed by the introduction of the porphyrins. All products were fully characterized, including, if possible, single-crystal XRD. UV/Vis absorption spectra of porphyrin-HBCs showed, depending on the number of porphyrins as well as with respect to the substitution pattern, variations in their spectral features with strong distortions of the porphyrins' B-band.
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Affiliation(s)
- Max M. Martin
- Department of Chemistry and Pharmacy & Interdisciplinary Center for, Molecular Materials (ICMM), Organic Chemistry IIFriedrich-Alexander-University Erlangen-NürnbergNikolaus-Fiebiger-Strasse 1091058ErlangenGermany
| | - Dominik Lungerich
- Department of Chemistry and Pharmacy & Interdisciplinary Center for, Molecular Materials (ICMM), Organic Chemistry IIFriedrich-Alexander-University Erlangen-NürnbergNikolaus-Fiebiger-Strasse 1091058ErlangenGermany
| | - Frank Hampel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for, Molecular Materials (ICMM), Organic Chemistry IIFriedrich-Alexander-University Erlangen-NürnbergNikolaus-Fiebiger-Strasse 1091058ErlangenGermany
| | - Jens Langer
- Inorganic and Organometallic ChemistryEgerlandstrasse 191058ErlangenGermany
| | - Tanya K. Ronson
- Department of ChemistryUniversity of CambridgeLensfield RoadCambridgeCB2 1EWUK
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for, Molecular Materials (ICMM), Organic Chemistry IIFriedrich-Alexander-University Erlangen-NürnbergNikolaus-Fiebiger-Strasse 1091058ErlangenGermany
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22
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Krug M, Stangel C, Zieleniewska A, Clark T, Torres T, Coutsolelos AG, Guldi DM. Combining Zinc Phthalocyanines, Oligo(p-Phenylenevinylenes), and Fullerenes to Impact Reorganization Energies and Attenuation Factors. Chemphyschem 2019; 20:2806-2815. [PMID: 31471925 DOI: 10.1002/cphc.201900780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 01/11/2023]
Abstract
A study on electron transfer in three electron donor-acceptor complexes is reported. These architectures consist of a zinc phthalocyanine (ZnPc) as the excited-state electron donor and a fullerene (C60 ) as the ground-state electron acceptor. These complexes are brought together by axial coordination at ZnPc. The key variable in our design is the length of the molecular spacer, namely, oligo-p-phenylenevinylenes. The lack of appreciable ground-state interactions is in accordance with strong excited-state interactions, as inferred from the quenching of ZnPc centered fluorescence and the presence of a short-lived fluorescence component. Full-fledged femtosecond and nanosecond transient absorption spectroscopy assays corroborated that the ZnPc ⋅ + -C60 ⋅ - charge-separated state formation comes at the expense of excited-state interactions following ZnPc photoexcitation. At a first glance, the ZnPc ⋅ + -C60 ⋅ - charge-separated state lifetime increased from 0.4 to 86.6 ns as the electron donor-acceptor separation increased from 8.8 to 29.1 Å. A closer look at the kinetics revealed that the changes in charge-separated state lifetime are tied to a decrease in the electronic coupling element from 132 to 1.2 cm-1 , an increase in the reorganization energy of charge transfer from 0.43 to 0.63 eV, and a large attenuation factor of 0.27 Å-1 .
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Affiliation(s)
- Marcel Krug
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Christina Stangel
- Department of Chemistry, University of Crete, Laboratory of Bioinorganic Chemistry, Voutes Campus, 71003, Heraklion, Crete, Greece.,Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens, 11635, Greece
| | - Anna Zieleniewska
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Timothy Clark
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Tomás Torres
- IMDEA-Nanociencia, C/Faraday, 9, Cantoblanco, 28049 -, Madrid, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Athanassios G Coutsolelos
- Department of Chemistry, University of Crete, Laboratory of Bioinorganic Chemistry, Voutes Campus, 71003, Heraklion, Crete, Greece
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
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