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Kinzelmann M, Fröhlich N, Vogel A, Kivala M, Drewello T. Tandem mass spectrometry of π-expanded triphenylamine and N-heterotriangulene scaffolds: Radical cation versus silver(I) adduct. JOURNAL OF MASS SPECTROMETRY : JMS 2024; 59:e5079. [PMID: 39132903 DOI: 10.1002/jms.5079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 06/09/2024] [Accepted: 07/12/2024] [Indexed: 08/13/2024]
Abstract
Triphenylamine (TPA) and N-heterotriangulene (N-HTA) scaffolds with up to three oligophenyl extensions are investigated by electrospray ionization (tandem) mass spectrometry (ESI-[MS/]MS). Due to their low oxidation potentials, all molecules readily form radical cations in the electrospray process. The energy-resolved collision-induced dissociation behaviour of the molecular ions is contrasted to that of the silver(I) adducts. Complexation with Ag(I) leads to the expected [1:1] and [2:1] complexes (MAg+ and M2Ag+); however, even [1:2] complexes (MAg2 2+) can be detected for molecules with two and three large π-expansions to allow stabilization of two charges. The TPA scaffolds decompose only at high collision energies through the loss of peripheral tert-butyl groups. A general mechanism for this is proposed commencing with a methyl loss and followed by the release of isobutene and butyl radical moieties. The N-HTA-based scaffolds are considerably less stable and molecular ions fragment at low collision energies. This is caused by the facile loss of methyl radicals from the dimethylmethylene-bridged triangulene core. In contrast, complexation with Ag+ leads to a dramatic stabilization. Most interestingly, dissociation eventually proceeds via the loss of neutral AgCH3, which is indicative of strong bidentate, tweezer-like bonding of Ag+ to the molecules.
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Affiliation(s)
- Marina Kinzelmann
- Department of Chemistry and Pharmacy, Physical Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Nina Fröhlich
- Department of Chemistry and Pharmacy, Organic Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Alexander Vogel
- Organisch-Chemisches Institut, Universität Heidelberg, Heidelberg, Germany
| | - Milan Kivala
- Department of Chemistry and Pharmacy, Organic Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Organisch-Chemisches Institut, Universität Heidelberg, Heidelberg, Germany
| | - Thomas Drewello
- Department of Chemistry and Pharmacy, Physical Chemistry I, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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2
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Steidel J, Michalsky I, Ajdari M, Kivala M, Tegeder P. Determination of energetic positions of electronic states and the exciton dynamics in a π-expanded N-heterotriangulene derivative adsorbed on Au(111). Phys Chem Chem Phys 2024; 26:16454-16458. [PMID: 38819930 DOI: 10.1039/d4cp01713g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
Bridged triarylamines, so-called N-heterotriangulenes (N-HTAs) are promising organic semiconductors for applications in optoelectronic devices. Thereby the electronic structure at organic/metal interfaces and within thin films as well as the electronically excited states dynamics after optical excitation is essential for the performance of organic-molecule-based devices. Here, we investigated the energy level alignment and the excited state dynamics of a N-HTA derivative adsorbed on Au(111) by means of energy- and time-resolved two-photon photoemission spectroscopy. We quantitatively determined the energetic positions of several occupied and unoccupied molecular (transport levels) and excitonic states (optical gap) in detail. A transport gap of 3.20 eV and an optical gap of 2.58 eV is determined, resulting in an exciton binding energy of 0.62 eV. With the first time-resolved investigation on a N-HTA compound we gained insights into the exciton dynamics and resolved processes on the femtosecond to picosecond timescale.
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Affiliation(s)
- Jakob Steidel
- Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
| | - Ina Michalsky
- Ruprecht-Karls-Universität Heidelberg, Organisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Mohsen Ajdari
- Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
| | - Milan Kivala
- Ruprecht-Karls-Universität Heidelberg, Organisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Petra Tegeder
- Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
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3
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Mayder DM, Tonge CM, Nguyen GD, Tran MV, Tom G, Darwish GH, Gupta R, Lix K, Kamal S, Algar WR, Burke SA, Hudson ZM. Polymer Dots with Enhanced Photostability, Quantum Yield, and Two-Photon Cross-Section using Structurally Constrained Deep-Blue Fluorophores. J Am Chem Soc 2021; 143:16976-16992. [PMID: 34618454 DOI: 10.1021/jacs.1c06094] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Semiconducting polymer dots (Pdots) have emerged as versatile probes for bioanalysis and imaging at the single-particle level. Despite their utility in multiplexed analysis, deep blue Pdots remain rare due to their need for high-energy excitation and sensitivity to photobleaching. Here, we describe the design of deep blue fluorophores using structural constraints to improve resistance to photobleaching, two-photon absorption cross sections, and fluorescence quantum yields using the hexamethylazatriangulene motif. Scanning tunneling microscopy was used to characterize the electronic structure of these chromophores on the atomic scale as well as their intrinsic stability. The most promising fluorophore was functionalized with a polymerizable acrylate handle and used to give deep-blue fluorescent acrylic polymers with Mn > 18 kDa and Đ < 1.2. Nanoprecipitation with amphiphilic polystyrene-graft-(carboxylate-terminated poly(ethylene glycol)) gave water-soluble Pdots with blue fluorescence, quantum yields of 0.81, and molar absorption coefficients of (4 ± 2) × 108 M-1 cm-1. This high brightness facilitated single-particle visualization with dramatically improved signal-to-noise ratio and photobleaching resistance versus an unencapsulated dye. The Pdots were then conjugated with antibodies for immunolabeling of SK-BR3 human breast cancer cells, which were imaged using deep blue fluorescence in both one- and two-photon excitation modes.
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Affiliation(s)
- Don M Mayder
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Christopher M Tonge
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Giang D Nguyen
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Michael V Tran
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Gary Tom
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Rupsa Gupta
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Kelsi Lix
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Saeid Kamal
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - W Russ Algar
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Sarah A Burke
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada.,Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Zachary M Hudson
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
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4
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Petkus J, Shubin K. Synthesis and Derivatization of N-Heterotriangulenes (Microreview). Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02691-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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5
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Schaub TA, Padberg K, Kivala M. Bridged triarylboranes, ‐silanes, ‐amines, and ‐phosphines as minimalistic heteroatom‐containing polycyclic aromatic hydrocarbons: Progress and challenges. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.4022] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Tobias A. Schaub
- Organisch‐Chemisches InstitutRuprecht‐Karls‐Universität Heidelberg Heidelberg Germany
| | - Kevin Padberg
- Department of Chemistry and PharmacyUniversität Erlangen‐Nürnberg Erlangen Germany
| | - Milan Kivala
- Organisch‐Chemisches InstitutRuprecht‐Karls‐Universität Heidelberg Heidelberg Germany
- Centre for Advanced MaterialsRuprecht‐Karls‐Universität Heidelberg Heidelberg Germany
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6
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Hirai M, Tanaka N, Sakai M, Yamaguchi S. Structurally Constrained Boron-, Nitrogen-, Silicon-, and Phosphorus-Centered Polycyclic π-Conjugated Systems. Chem Rev 2019; 119:8291-8331. [DOI: 10.1021/acs.chemrev.8b00637] [Citation(s) in RCA: 286] [Impact Index Per Article: 57.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Masato Hirai
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
| | - Naoki Tanaka
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
| | - Mika Sakai
- Department of Chemistry, Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Shigehiro Yamaguchi
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
- Department of Chemistry, Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
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7
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Steiner C, Yang Z, Gliemann BD, Meinhardt U, Gurrath M, Ammon M, Meyer B, Kivala M, Maier S. Binary supramolecular networks of bridged triphenylamines with different substituents and identical scaffolds. Chem Commun (Camb) 2018; 54:11554-11557. [PMID: 30272078 DOI: 10.1039/c8cc04410d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on scanning tunneling microscopy experiments combined with density functional theory, we report the formation and the electronic structure of porous binary supramolecular networks on Au(111). The two triphenylamine derivatives with identical scaffolds intermix due to a maximization of the overall number of H-bonds instead of an optimization of the H-bond strength in the bonding motif. The HOMO-LUMO gap is defined by both molecules, which is typical for electron donor-acceptor networks.
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Affiliation(s)
- Christian Steiner
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Straße 1, D-91058 Erlangen, Germany.
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8
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Ooyama Y, Furue K, Enoki T, Kanda M, Adachi Y, Ohshita J. Development of type-I/type-II hybrid dye sensitizer with both pyridyl group and catechol unit as anchoring group for type-I/type-II dye-sensitized solar cell. Phys Chem Chem Phys 2018; 18:30662-30676. [PMID: 27790658 DOI: 10.1039/c6cp06513a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A type-I/type-II hybrid dye sensitizer with a pyridyl group and a catechol unit as the anchoring group has been developed and its photovoltaic performance in dye-sensitized solar cells (DSSCs) is investigated. The sensitizer has the ability to adsorb on a TiO2 electrode through both the coordination bond at Lewis acid sites and the bidentate binuclear bridging linkage at Brønsted acid sites on the TiO2 surface, which makes it possible to inject an electron into the conduction band of the TiO2 electrode by the intramolecular charge-transfer (ICT) excitation (type-I pathway) and by the photoexcitation of the dye-to-TiO2 charge transfer (DTCT) band (type-II pathway). It was found that the type-I/type-II hybrid dye sensitizer adsorbed on TiO2 film exhibits a broad photoabsorption band originating from ICT and DTCT characteristics. Here we reveal the photophysical and electrochemical properties of the type-I/type-II hybrid dye sensitizer bearing a pyridyl group and a catechol unit, along with its adsorption modes onto TiO2 film, and its photovoltaic performance in type-I/type-II DSSC, based on optical (photoabsorption and fluorescence spectroscopy) and electrochemical measurements (cyclic voltammetry), density functional theory (DFT) calculation, FT-IR spectroscopy of the dyes adsorbed on TiO2 film, photocurrent-voltage (I-V) curves, incident photon-to-current conversion efficiency (IPCE) spectra, and electrochemical impedance spectroscopy (EIS) for DSSC.
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Affiliation(s)
- Yousuke Ooyama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Kensuke Furue
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Toshiaki Enoki
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Masahiro Kanda
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Yohei Adachi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Joji Ohshita
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
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9
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Chen XK, Tsuchiya Y, Ishikawa Y, Zhong C, Adachi C, Brédas JL. A New Design Strategy for Efficient Thermally Activated Delayed Fluorescence Organic Emitters: From Twisted to Planar Structures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1702767. [PMID: 29044726 DOI: 10.1002/adma.201702767] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/16/2017] [Indexed: 05/24/2023]
Abstract
In the traditional molecular design of thermally activated delayed fluorescence (TADF) emitters composed of electron-donor and electron-acceptor moieties, achieving a small singlet-triplet energy gap (ΔEST ) in strongly twisted structures usually translates into a small fluorescence oscillator strength, which can significantly decrease the emission quantum yield and limit efficiency in organic light-emitting diode devices. Here, based on the results of quantum-chemical calculations on TADF emitters composed of carbazole donor and 2,4,6-triphenyl-1,3,5-triazine acceptor moieties, a new strategy is proposed for the molecular design of efficient TADF emitters that combine a small ΔEST with a large fluorescence oscillator strength. Since this strategy goes beyond the traditional framework of structurally twisted, charge-transfer type emitters, importantly, it opens the way for coplanar molecules to be efficient TADF emitters. Here, a new emitter, composed of azatriangulene and diphenyltriazine moieties, is theoretically designed, which is coplanar due to intramolecular H-bonding interactions. The synthesis of this hexamethylazatriangulene-triazine (HMAT-TRZ) emitter and its preliminary photophysical characterizations point to HMAT-TRZ as a potential efficient TADF emitter.
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Affiliation(s)
- Xian-Kai Chen
- Laboratory for Computational and Theoretical Chemistry of Advanced Materials, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Adachi Molecular Exciton Engineering Project, Japan Science and Technology Agency (JST), ERATO, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Yuma Ishikawa
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Cheng Zhong
- Laboratory for Computational and Theoretical Chemistry of Advanced Materials, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Adachi Molecular Exciton Engineering Project, Japan Science and Technology Agency (JST), ERATO, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Jean-Luc Brédas
- Laboratory for Computational and Theoretical Chemistry of Advanced Materials, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
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10
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Gliemann BD, Strauss V, Hitzenberger JF, Dral PO, Hampel F, Gisselbrecht JP, Drewello T, Thiel W, Guldi DM, Kivala M. Dithiafulvenyl-Extended N
-Heterotriangulenes and Their Interaction with C60
: Cooperative Fluorescence. Chemistry 2017; 23:12353-12362. [DOI: 10.1002/chem.201701625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Bettina D. Gliemann
- Department of Chemistry and Pharmacy; University of Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Volker Strauss
- Department of Chemie and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Jakob F. Hitzenberger
- Department of Chemie and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Pavlo O. Dral
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Frank Hampel
- Department of Chemistry and Pharmacy; University of Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
| | - Jean-Paul Gisselbrecht
- Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide; Institut de Chimie-LC3-UMR 7177, C.N.R.S; Université de Strasbourg, 4; rue Blaise Pascal 67000 Strasbourg France
| | - Thomas Drewello
- Department of Chemie and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Dirk M. Guldi
- Department of Chemie and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Milan Kivala
- Department of Chemistry and Pharmacy; University of Erlangen-Nürnberg; Henkestrasse 42 91054 Erlangen Germany
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11
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Hitzenberger JF, Dral PO, Meinhardt U, Clark T, Thiel W, Kivala M, Drewello T. Stability of Odd- Versus Even-Electron Gas-Phase (Quasi)Molecular Ions Derived from Pyridine-Substituted N-Heterotriangulenes. Chempluschem 2017; 82:204-211. [PMID: 31961553 DOI: 10.1002/cplu.201600416] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/11/2016] [Indexed: 11/08/2022]
Abstract
Electrospray ionisation of N-heterotriangulenes (i.e., dimethylmethylene-bridged triphenylamines) with up to three pyridyl groups at their periphery, produces the true radical cation ([M]+ . ) and the protonated molecule ([M+H]+ ) simultaneously. These ions are studied as model systems to illustrate the stability alternation of odd- versus even-electron ions in energy-dependent collision-induced dissociation (CID) experiments. All ions show the same fragmentation pattern, the consecutive loss of three methyl radicals (. CH3 ) from the dimethylmethylene bridges of the central triangulene core. [M]+ . ions dissociate at much lower collision energies than their [M+H]+ counterparts. The radical cation forms a singlet fragment with an extended aromatic system that is energetically favoured. Ab initio and density functional theory calculations support this interpretation and allow the assignment of the electronic structure of the fragment ions. Consecutive collision-induced dissociations provide a better match with theory when studied with an ion trap, rather than a linear quadrupole. This is attributed to the resonant nature of the excitation of intermediate ions.
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Affiliation(s)
- Jakob F Hitzenberger
- Physical Chemistry I, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse 3, 91058, Erlangen, Germany
| | - Pavlo O Dral
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Ute Meinhardt
- Organic Chemistry I, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Henkestrasse 42, 91054, Erlangen, Germany
| | - Timothy Clark
- Computer-Chemie-Centrum, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Nägelbachstrasse 25, 91052, Erlangen, Germany
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Milan Kivala
- Organic Chemistry I, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Henkestrasse 42, 91054, Erlangen, Germany
| | - Thomas Drewello
- Physical Chemistry I, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse 3, 91058, Erlangen, Germany
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12
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Ooyama Y, Kanda M, EnoKi T, Adachi Y, Ohshita J. Synthesis, optical and electrochemical properties, and photovoltaic performance of a panchromatic and near-infrared (D)2–π–A type BODIPY dye with pyridyl group or cyanoacrylic acid. RSC Adv 2017. [DOI: 10.1039/c7ra00799j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
(D)2–π–A type BODIPY dyes bearing a pyridyl group or cyanoacrylic acid group and two diphenylamine–thienylcarbazole moieties which possess near-infrared adsorption ability as well as panchromatic adsorption ability, have been developed.
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Affiliation(s)
- Yousuke Ooyama
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Masahiro Kanda
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Toshiaki EnoKi
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Yohei Adachi
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Joji Ohshita
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
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13
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Ooyama Y, Yamaguchi N, Ohshita J, Harima Y. Impact of the molecular structure and adsorption mode of D-π-A dye sensitizers with a pyridyl group in dye-sensitized solar cells on the adsorption equilibrium constant for dye-adsorption on TiO 2 surface. Phys Chem Chem Phys 2016; 18:32992-32998. [PMID: 27886308 DOI: 10.1039/c6cp07386g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
D-π-A dyes NI-4 bearing a pyridyl group, YNI-1 bearing two pyridyl groups and YNI-2 bearing two thienylpyridyl groups as the anchoring group on the TiO2 surface have been developed as dye sensitizers for dye-sensitized solar cells (DSSCs), where NI-4 and YNI-2 can adsorb onto the TiO2 electrode through the formation of the coordinate bond between the pyridyl group of the dye and the Lewis acid site (exposed Tin+ cations) on the TiO2 surface, but YNI-1 is predominantly adsorbed on the TiO2 electrode through the formation of the hydrogen bond between the pyridyl group of the dye and the Brønsted acid sites (surface-bound hydroxyl groups, Ti-OH) on the TiO2 surface. The difference in the dye-adsorption mode among the three dyes on the TiO2 surface has been investigated from the adsorption equilibrium constant (Kad) based on the Langmuir adsorption isotherms. It was found that the Kad values of YNI-1 and YNI-2 are higher than that of NI-4, and more interestingly, the Kad value of YNI-2 is higher than that of YNI-1. This work demonstrates that that for the D-π-A dye sensitizers with the pyridyl group as the anchoring group to the TiO2 surface the number of pyridyl groups and the dye-adsorption mode on the TiO2 electrode as well as the molecular structure of the dye sensitizer affect the Kad value for the adsorption of the dye to the TiO2 electrode, that is, resulting in a difference in the Kad value among the D-π-A dye sensitizers NI-4, YNI-1 and YNI-2.
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Affiliation(s)
- Yousuke Ooyama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Naoya Yamaguchi
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Joji Ohshita
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Yutaka Harima
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
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