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Roger C, Schmiedel A, Holzapfel M, Lukzen NN, Steiner UE, Lambert C. The influence of hindered rotation on electron transfer and exchange interaction in triarylamine-triptycene-perylene diimide triads. Phys Chem Chem Phys 2024; 26:4954-4967. [PMID: 38277181 DOI: 10.1039/d3cp05785b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
Stretched electron-donor-bridge-acceptor triads that exhibit intramolecular twisting degrees of freedom are capable of modulating exchange interaction (J) as well as electronic couplings through variable π-overlap at the linear bond links, affecting the rate constants of photoinduced charge separation and recombination. Here we present an in-depth investigation of such effects induced by methyl substituents leading to controlled steric hindrance of intramolecular twisting around biaryl axes. Starting from the parent structure, consisting of a triphenyl amine donor, a triptycene (TTC) bridge and a phenylene-perylene diimide acceptor (Me0), one of the two phenylene linkers attached to the TTC was ortho-substituted by two methyl groups (Me2, Me3), or both such phenylene linkers by two pairs of methyl groups (Me23). Photoinduced charge separation (kCS) leading to a charge-separated (CS) state was studied by fs-laser spectroscopy, charge recombination to either singlet ground state (kS) or to the first excited local triplet state of the acceptor (kT) by ns-laser spectroscopy, whereby kinetic magnetic field effects in an external magnetic field were recorded and analysed using quantum dynamic simulations of the spin dependent kinetics of the CS state. Kinetic spectra of the initial first order rate constants of charge recombination (k(B)) exhibited characteristic J-resonances progressing to lower fields in the series Me0, Me2, Me3, Me23. From the quantum simulations, the values of the parameters J, kS, kT and kSTD, the singlet/triplet dephasing constant, were obtained. They were analysed in terms of molecular dynamics simulations of the intramolecular twisting dynamics based on potentials calculated by density functional theory. Apart from kT, all of the parameters exhibit a clear correlation with the averaged cosine square products of the biaryl angles.
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Affiliation(s)
- Chantal Roger
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Alexander Schmiedel
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Marco Holzapfel
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
| | - Nikita N Lukzen
- International Tomography Center, Russia and Novosibirsk State University, Institutskaya 3a, Novosibirsk, Novosibirsk 630090, Russia
| | - Ulrich E Steiner
- Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany.
| | - Christoph Lambert
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
- Center for Nanosystems Chemistry, Universität Würzburg, Theodor-Boveri-Weg, D-97074 Würzburg, Germany
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2
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Sarkar S, Maiti SK. Localization to delocalization transition in a double stranded helical geometry: effects of conformation, transverse electric field and dynamics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:505301. [PMID: 33006319 DOI: 10.1088/1361-648x/abb05f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
Conformational effect on electronic localization is critically investigated for the first time considering a double-stranded helical geometry (DSHG) subjected to an electric field. In the presence of electric field the DSHG behaves like a correlated disordered system whose site potentials are modulated in a cosine form like the well known Aubry-André-Harper model. The potential distribution can be modulated further by changing the orientation of the incident field. A similar kind of cosine modulation is also introduced in the inter-strand hopping integrals of the DSHG. Suitably adjusting the orientation of the electric field, we can achieve fully extended energy eigenstates or completely localized ones or a mixture of both. The effects of short-range and long-range hopping integrals along with the chirality on localization are thoroughly studied. Finally, we inspect the role of helical dynamics to make the model more realistic. The interplay between the helical geometry and electric field may open up several notable features of electronic localization and can be verified by using different chiral molecules.
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Affiliation(s)
- Suparna Sarkar
- Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, Kolkata-700 108, India
| | - Santanu K Maiti
- Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, Kolkata-700 108, India
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3
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Xiang S, Nie X, Dong F, Cheng W, Liu M, Ding C, Bian L, Sun S, Li H. Spectroscopic and theoretical calculation insight into interaction mechanism between U(VI) and phospholipid under carbonate environment. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Singh P, Deckert-Gaudig T, Zhang Z, Deckert V. Plasmon induced deprotonation of 2-mercaptopyridine. Analyst 2020; 145:2106-2110. [PMID: 32016191 DOI: 10.1039/c9an01970g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface plasmons can provide a novel route to induce and simultaneously monitor selective bond formation and breakage. Here pH-induced protonation, followed by plasmon-induced deprotonation of 2-mercaptopyridine was investigated using surface- and tip-enhanced Raman scattering (SERS and TERS). A large difference in the deprotonation rate between SERS and TERS will be demonstrated and discussed with respect to hot-spot distribution.
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Affiliation(s)
- Pushkar Singh
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany.
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5
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Liu JJ, Li J. Chromism of three complexes derived from 1-butyl-4,4′-bipyridinium ligand and 1,3,5-benzenetricarboxylic acid. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Alaghemandi M, Koller V, Green JR. Nonexponential kinetics of ion pair dissociation in electrofreezing water. Phys Chem Chem Phys 2017; 19:26396-26402. [PMID: 28944386 DOI: 10.1039/c7cp04572g] [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
Temporally- or spatially-heterogeneous environments can participate in many kinetic processes, from chemical reactions and self-assembly to the forced dissociation of biomolecules. Here, we simulate the molecular dynamics of a model ion pair forced to dissociate in an explicit, aqueous solution. Triggering dissociation with an external electric field causes the surrounding water to electrofreeze and the ion pair population to decay nonexponentially. To further probe the role of the aqueous environment in the kinetics, we also simulate dissociation events under a purely mechanical force on the ion pair. In this case, regardless of whether the surrounding water is a liquid or already electrofrozen, the ion pair population decays exponentially with a well-defined rate constant that is specific to the medium and applied force. These simulation data, and the rate parameters we extract, suggest the disordered kinetics in an electrofreezing medium are a result of the comparable time scales of two concurrent processes, electrofreezing and dissociation.
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Affiliation(s)
- Mohammad Alaghemandi
- Department of Chemistry, University of Massachusetts Boston, Boston, MA 02125, USA.
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7
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Lambropoulos K, Chatzieleftheriou M, Morphis A, Kaklamanis K, Lopp R, Theodorakou M, Tassi M, Simserides C. Electronic structure and carrier transfer in B-DNA monomer polymers and dimer polymers: Stationary and time-dependent aspects of a wire model versus an extended ladder model. Phys Rev E 2016; 94:062403. [PMID: 28085358 DOI: 10.1103/physreve.94.062403] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Indexed: 06/06/2023]
Abstract
We employ two tight-binding (TB) approaches to systematically study the electronic structure and hole or electron transfer in B-DNA monomer polymers and dimer polymers made up of N monomers (base pairs): (I) at the base-pair level, using the onsite energies of base pairs and the hopping integrals between successive base pairs, i.e., a wire model and (II) at the single-base level, using the onsite energies of the bases and the hopping integrals between neighboring bases, i.e., an extended ladder model since we also include diagonal hoppings. We solve a system of M (matrix dimension) coupled equations [(I) M=N, (II) M=2N] for the time-independent problem, and a system of M coupled first order differential equations for the time-dependent problem. We perform a comparative study of stationary and time-dependent aspects of the two TB variants, using realistic sets of parameters. The studied properties include HOMO and LUMO eigenspectra, occupation probabilities, density of states and HOMO-LUMO gaps as well as mean over time probabilities to find the carrier at each site [(I) base pair or (II) base], Fourier spectra, which reflect the frequency content of charge transfer, and pure mean transfer rates from a certain site to another. The two TB approaches give coherent, complementary aspects of electronic properties and charge transfer in B-DNA monomer polymers and dimer polymers.
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Affiliation(s)
- K Lambropoulos
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - M Chatzieleftheriou
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - A Morphis
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - K Kaklamanis
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - R Lopp
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - M Theodorakou
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - M Tassi
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
| | - C Simserides
- National and Kapodistrian University of Athens, Department of Physics, Panepistimiopolis, 15784 Zografos, Athens, Greece
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Hu S, You M, Chen S, Fu Z. A fast-response photochromic host–guest coordination polymer with a close-packed stacking structure. CrystEngComm 2016. [DOI: 10.1039/c6ce00727a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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9
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Two viologen-based crystalline photoactive complexes constructed by zinc chloride and N-(3-cyanophenyl)-4,4′-bipyridinium units: Structural arrangement of donor–acceptor units and photoresponsive characteristics. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.04.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Gorczak N, Renaud N, Tarkuç S, Houtepen AJ, Eelkema R, Siebbeles LDA, Grozema FC. Charge transfer versus molecular conductance: molecular orbital symmetry turns quantum interference rules upside down. Chem Sci 2015; 6:4196-4206. [PMID: 29218186 PMCID: PMC5707500 DOI: 10.1039/c5sc01104c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 05/08/2015] [Indexed: 11/21/2022] Open
Abstract
Destructive quantum interference has been shown to strongly reduce charge tunneling rates across molecular bridges. The current consensus is that destructive quantum interference occurs in cross-conjugated molecules, while linearly conjugated molecules exhibit constructive interference. Our experimental results on photoinduced charge transfer in donor-bridge-acceptor systems, however, show that hole transfer is ten times faster through a cross-conjugated biphenyl bridge than through a linearly conjugated biphenyl bridge. Electronic structure calculations reveal that the surprisingly low hole transfer rate across the linearly conjugated biphenyl bridge is caused by the presence of destructive instead of constructive interference. We find that the specific molecular orbital symmetry of the involved donor and acceptor states leads to interference conditions that are different from those valid in single molecule conduction experiments. Furthermore, the results indicate that by utilizing molecular orbital symmetry in a smart way new opportunities of engineering charge transfer emerge.
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Affiliation(s)
- Natalie Gorczak
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Nicolas Renaud
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Simge Tarkuç
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Arjan J Houtepen
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Rienk Eelkema
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Laurens D A Siebbeles
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
| | - Ferdinand C Grozema
- Department of Chemical Engineering , Delft University of Technology , Delft , The Netherlands .
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11
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Nichols JW, Flynn SW, Green JR. Order and disorder in irreversible decay processes. J Chem Phys 2015; 142:064113. [DOI: 10.1063/1.4907629] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Jonathan W. Nichols
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, USA
| | - Shane W. Flynn
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, USA
| | - Jason R. Green
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, USA
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12
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Jackson NE, Heitzer HM, Savoie BM, Reuter MG, Marks TJ, Ratner MA. Emergent Properties in Locally Ordered Molecular Materials. Isr J Chem 2014. [DOI: 10.1002/ijch.201400021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Ozeryanskii VA, Filatova EA, Pozharskii AF, Shevchuk DA, Sorokin VI. To what extent can a conjugation between two pairs of peri
-nitro and peri
-amino groups be realized through the naphthalene core? J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Valery A. Ozeryanskii
- Department of Organic Chemistry; Southern Federal University; Zorge 7 344090 Rostov-on-Don Russian Federation
| | - Ekaterina A. Filatova
- Department of Organic Chemistry; Southern Federal University; Zorge 7 344090 Rostov-on-Don Russian Federation
| | - Alexander F. Pozharskii
- Department of Organic Chemistry; Southern Federal University; Zorge 7 344090 Rostov-on-Don Russian Federation
| | - Dmitrii A. Shevchuk
- Department of Organic Chemistry; Southern Federal University; Zorge 7 344090 Rostov-on-Don Russian Federation
| | - Vladimir I. Sorokin
- Department of Organic Chemistry; Southern Federal University; Zorge 7 344090 Rostov-on-Don Russian Federation
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14
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Ricks AB, Brown KE, Wenninger M, Karlen SD, Berlin YA, Co DT, Wasielewski MR. Exponential distance dependence of photoinitiated stepwise electron transfer in donor-bridge-acceptor molecules: implications for wirelike behavior. J Am Chem Soc 2012; 134:4581-8. [PMID: 22335614 DOI: 10.1021/ja205913q] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Donor-bridge-acceptor (D-B-A) systems in which a 3,5-dimethyl-4-(9-anthracenyl)julolidine (DMJ-An) chromophore and a naphthalene-1,8:4,5-bis(dicarboximide) (NI) acceptor are linked by oligomeric 2,7-fluorenone (FN(n)) bridges (n = 1-3) have been synthesized. Selective photoexcitation of DMJ-An quantitatively produces DMJ(+•)-An(-•), and An(-•) acts as a high-potential electron donor. Femtosecond transient absorption spectroscopy in the visible and mid-IR regions showed that electron transfer occurs quantitatively in the sequence: DMJ(+•)-An(-•)-FN(n)-NI → DMJ(+•)-An-FN(n)(-•)-NI → DMJ(+•)-An-FN(n)-NI(-•). The charge-shift reaction from An(-•) to NI(-•) exhibits an exponential distance dependence in the nonpolar solvent toluene with an attenuation factor (β) of 0.34 Å(-1), which would normally be attributed to electron tunneling by the superexchange mechanism. However, the FN(n)(-•) radical anion was directly observed spectroscopically as an intermediate in the charge-separation mechanism, thereby demonstrating conclusively that the overall charge separation involves the incoherent hopping (stepwise) mechanism. Kinetic modeling of the data showed that the observed exponential distance dependence is largely due to electron injection onto the first FN unit followed by charge hopping between the FN units of the bridge biased by the distance-dependent electrostatic attraction of the two charges in D(+•)-B(-•)-A. This work shows that wirelike behavior does not necessarily result from building a stepwise, energetically downhill redox gradient into a D-B-A molecule.
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Affiliation(s)
- Annie Butler Ricks
- Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
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Glover SD, Kubiak CP. Persistence of the Three-State Description of Mixed Valency at the Localized-to-Delocalized Transition. J Am Chem Soc 2011; 133:8721-31. [DOI: 10.1021/ja2022784] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Starla D. Glover
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, United States
| | - Clifford P. Kubiak
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, United States
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