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Łaski P, Bosman L, Drapała J, Kamiński R, Szarejko D, Borowski P, Roodt A, Henning R, Brink A, Jarzembska KN. Nanosecond-Lived Excimer Observation in a Crystal of a Rhodium(I) Complex via Time-Resolved X-ray Laue Diffraction. J Phys Chem Lett 2024; 15:10301-10306. [PMID: 39382182 DOI: 10.1021/acs.jpclett.4c02476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2024]
Abstract
The rare observation of transient Rh···Rh excimer formation in a single crystal is reported. The estimated excited-state lifetime at 100 K is 2 ns, which makes it the shortest-lived small-molecule species caught experimentally using the laser-pump/X-ray-probe time-resolved Laue method. Upon excitation with 390 nm laser light, the intermolecular Rh···Rh distance decreases from 3.379(4) to 3.19(1) Å, and the metal-metal contact gains more bonding character. On the basis of the experimental results and theoretical modeling, the structural changes determined with 100 ps time resolution reflect principally the S0 → S1 electronic transition.
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Affiliation(s)
- Piotr Łaski
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Lerato Bosman
- Department of Chemistry, University of the Free State, Nelson Mandela Drive, Bloemfontein 9301, South Africa
| | - Jakub Drapała
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Radosław Kamiński
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Dariusz Szarejko
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Patryk Borowski
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Andreas Roodt
- Department of Chemistry, University of the Free State, Nelson Mandela Drive, Bloemfontein 9301, South Africa
| | - Robert Henning
- Center for Advanced Radiation Sources, University of Chicago, 5734 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Alice Brink
- Department of Chemistry, University of the Free State, Nelson Mandela Drive, Bloemfontein 9301, South Africa
| | - Katarzyna N Jarzembska
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
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2
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Hatcher LE, Warren MR, Raithby PR. Methods in molecular photocrystallography. Acta Crystallogr C Struct Chem 2024; 80:585-600. [PMID: 39226421 PMCID: PMC11451014 DOI: 10.1107/s2053229624007460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 07/29/2024] [Indexed: 09/05/2024] Open
Abstract
Over the last three decades, the technology that makes it possible to follow chemical processes in the solid state in real time has grown enormously. These studies have important implications for the design of new functional materials for applications in optoelectronics and sensors. Light-matter interactions are of particular importance, and photocrystallography has proved to be an important tool for studying these interactions. In this technique, the three-dimensional structures of light-activated molecules, in their excited states, are determined using single-crystal X-ray crystallography. With advances in the design of high-power lasers, pulsed LEDs and time-gated X-ray detectors, the increased availability of synchrotron facilities, and most recently, the development of XFELs, it is now possible to determine the structures of molecules with lifetimes ranging from minutes down to picoseconds, within a single crystal, using the photocrystallographic technique. This review discusses the procedures for conducting successful photocrystallographic studies and outlines the different methodologies that have been developed to study structures with specific lifetime ranges. The complexity of the methods required increases considerably as the lifetime of the excited state shortens. The discussion is supported by examples of successful photocrystallographic studies across a range of timescales and emphasises the importance of the use of complementary analytical techniques in order to understand the solid-state processes fully.
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Affiliation(s)
- Lauren E. Hatcher
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Mark R. Warren
- Diamond Light Source, Harwell Science and Innovation Campus Fermi Ave Didcot OX11 0DE United Kingdom
| | - Paul. R. Raithby
- Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom
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3
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Wang D, Hu W, Liu C, Huang J, Zhang X. Electronic Tuning of Photoexcited Dynamics in Heteroleptic Cu(I) Complex Photosensitizers. J Phys Chem Lett 2023; 14:10137-10144. [PMID: 37922426 DOI: 10.1021/acs.jpclett.3c02503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2023]
Abstract
Photoexcited dynamics of heteroleptic Cu(I) complexes as noble-metal-free photosensitizers are closely intertwined with the nature of their ligands. By utilizing ultrafast optical and X-ray transient absorption spectroscopies, we characterized a new set of heteroleptic Cu(I) complexes [Cu(PPh3)2(BPyR)]+ (R = CH3, H, Br to COOCH3), with an increase in the electron-withdrawing ability of the functional group (R). We found that after the transient photooxidation of Cu(I) to Cu(II), the increasing electron-withdrawing ability of R barely affects the internal conversion (IC) (e.g., Jahn-taller (JT) distortion) between singlet MLCT states. However, it does accelerate the dynamics of intersystem crossing (ISC) between singlet and triplet MLCT states and the subsequent decay from the triplet MLCT state to the ground state. The associated lifetime constants are reduced by up to 300%. Our understanding of the photoexcited dynamics in heteroleptic Cu(I) complexes through ligand electronic tuning provides valuable insight into the rational design of efficient Cu(I) complex photosensitizers.
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Affiliation(s)
- Denan Wang
- Department of Chemistry, Marquette University, Milwaukee, 53201, United States
| | - Wenhui Hu
- Department of Chemistry, Marquette University, Milwaukee, 53201, United States
| | - Cunming Liu
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60349, United States
| | - Jier Huang
- Department of Chemistry, Marquette University, Milwaukee, 53201, United States
- Department of Chemistry and Schiller Institute for Integrated Science and Society, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xiaoyi Zhang
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60349, United States
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4
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Hatcher LE, Saunders LK, Coulson BA. Uncovering the role of non-covalent interactions in solid-state photoswitches by non-spherical structure refinements with NoSpherA2. Faraday Discuss 2023; 244:370-390. [PMID: 37083212 DOI: 10.1039/d2fd00158f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We present a charge density study of two linkage isomer photoswitches, [Pd(Bu4dien)(NO2)]BPh4·THF (1) and [Ni(Et4dien)(NO2)2] (2) using Hirshfeld Atom Refinement (HAR) methods implemented via the NoSpherA2 interface in Olex2. HAR is used to explore the electron density distribution in the photoswitchable molecules of 1 and 2, to gain an in-depth understanding of key bonding features and their influence on the single-crystal-to-single-crystal reaction. HAR analysis is also combined with ab initio calculations to explore the non-covalent interactions that influence physical properties of the photoswitches, such as the stability of the excited state nitrito-(η1-ONO) isomer. This insight can be fed back into the crystal engineering process to develop new and improved photoswitches that can be optimised towards specific applications.
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Affiliation(s)
- Lauren E Hatcher
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 AT, UK.
| | - Lucy K Saunders
- Diamond Light Source, Harwell Science and Innovation Campus, Fermi Ave, Didcot, OX11 0DE, UK
| | - Ben A Coulson
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 AT, UK.
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5
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Basuroy K, Velazquez-Garcia JDJ, Storozhuk D, Henning R, Gosztola DJ, Thekku Veedu S, Techert S. Axial vs equatorial: Capturing the intramolecular charge transfer state geometry in conformational polymorphic crystals of a donor-bridge-acceptor dyad in nanosecond-time-scale. J Chem Phys 2023; 158:054304. [PMID: 36754826 PMCID: PMC10481388 DOI: 10.1063/5.0134792] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 01/11/2023] [Indexed: 01/15/2023] Open
Abstract
Two conformational polymorphs of a donor-bridge-acceptor (D-B-A) dyad, p-(CH3)2N-C6H4-(CH2)2-(1-pyrenyl)/PyCHDMA, were studied, where the electron donor (D) moiety p-(CH3)2N-C6H4/DMA is connected through a bridging group (B), -CH2-CH2-, to the electron acceptor (A) moiety pyrene. Though molecular dyads like PyCHDMA have the potential to change solar energy into electrical current through the process of photoinduced intramolecular charge transfer (ICT), the major challenge is the real-time investigation of the photoinduced ICT process in crystals, necessary to design solid-state optoelectronic materials. The time-correlated single photon counting (TCSPC) measurements with the single crystals showed that the ICT state lifetime of the thermodynamic form, PyCHDMA1 (pyrene and DMA: axial), is ∼3 ns, whereas, for the kinetic form, PyCHDMA20 (pyrene and DMA: equatorial), it is ∼7 ns, while photoexcited with 375 nm radiation. The polymorphic crystals were photo-excited and subsequently probed with a pink Laue x-ray beam in time-resolved x-ray diffraction (TRXRD) measurements. The TRXRD results suggest that in the ICT state, due to electron transfer from the tertiary N-atom in DMA moiety to the bridging group and pyrene moiety, a decreased repulsion between the lone-pair and the bond-pair at N-atom induces planarity in the C-N-(CH3)2 moiety, in both polymorphs. The Natural Bond Orbital calculations and partial atomic charge analysis by Hirshfeld partitioning also corroborated the same. Although the interfragment charge transfer (IFCT) analysis using the TDDFT results showed that for the charge transfer excitation in both conformers, the electrons were transferred from the DMA moiety to mostly the pyrene moiety, the bridging group has little role to play in that.
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Affiliation(s)
- Krishnayan Basuroy
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Darina Storozhuk
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Robert Henning
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, USA
| | - David J. Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
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6
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Borowski P, Kutniewska SE, Kamiński R, Krówczyński A, Schaniel D, Jarzembska KN. Exploring Photoswitchable Properties of Two Nitro Nickel(II) Complexes with ( N, N, O)-Donor Ligands and Their Copper(II) Analogues. Inorg Chem 2022; 61:6624-6640. [PMID: 35430817 PMCID: PMC9066408 DOI: 10.1021/acs.inorgchem.2c00526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patryk Borowski
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Sylwia E. Kutniewska
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Radosław Kamiński
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Adam Krówczyński
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
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7
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Li Q, Wang J, Wu Y, Zhao F, He H, Wang Y. Luminescent copper(I) complexes bearing benzothiazole-imidazolylidene ligand with various substituents: Synthesis, photophysical properties and computational studies. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Lu Y, Li X, Wang J, Zhao F, Wang Y, He H, Wu Y. Synthesis, characterization and DFT studies of luminescent copper(I) complexes containing pyridine-imidazole ligands with tunable π-conjugation system via variation of polyaromatic groups. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Hatcher LE, Coulson BA. Exploring the influence of polymorphism and chromophore co-ligands on linkage isomer photoswitching in [Pd(bpy4dca)(NO 2) 2]. CrystEngComm 2022. [DOI: 10.1039/d2ce00213b] [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
The polymorphic Pd(II)-nitrite complex [Pd(bpy4dca)(NO2)2] (1) (bpy4dca = 2,2’-bipyridine-4,4’-dicarboxylic acid methyl ester) is shown to undergo photoinduced nitro → nitrito linkage isomer switching in two crystal forms, to varying excited...
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10
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Copper(I) complexes with remotely functionalized phosphine ligands: Synthesis, structural variety, photophysics and effect onto the optical properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119971] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Pathaw L, Maheshwaran D, Nagendraraj T, Khamrang T, Velusamy M, Mayilmurugan R. Tetrahedral copper(I) complexes of novel N,N-bidentate ligands and photophysical properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Kamiński R, Szarejko D, Pedersen MN, Hatcher LE, Łaski P, Raithby PR, Wulff M, Jarzembska KN. Instrument-model refinement in normalized reciprocal-vector space for X-ray Laue diffraction. J Appl Crystallogr 2020; 53:1370-1375. [PMID: 33122973 DOI: 10.1107/s1600576720011929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 08/29/2020] [Indexed: 11/10/2022] Open
Abstract
A simple yet efficient instrument-model refinement method for X-ray diffraction data is presented and discussed. The method is based on least-squares minimization of differences between respective normalized (i.e. unit length) reciprocal vectors computed for adjacent frames. The approach was primarily designed to work with synchrotron X-ray Laue diffraction data collected for small-molecule single-crystal samples. The method has been shown to work well on both simulated and experimental data. Tests performed on simulated data sets for small-molecule and protein crystals confirmed the validity of the proposed instrument-model refinement approach. Finally, examination of data sets collected at both BioCARS 14-ID-B (Advanced Photon Source) and ID09 (European Synchrotron Radiation Facility) beamlines indicated that the approach is capable of retrieving goniometer parameters (e.g. detector distance or primary X-ray beam centre) reliably, even when their initial estimates are rather inaccurate.
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Affiliation(s)
- Radosław Kamiński
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Dariusz Szarejko
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Martin N Pedersen
- Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Lauren E Hatcher
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.,School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Piotr Łaski
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Paul R Raithby
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Michael Wulff
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38043 Grenoble, France
| | - Katarzyna N Jarzembska
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
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13
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Szarejko D, Kamiński R, Łaski P, Jarzembska KN. Seed-skewness algorithm for X-ray diffraction signal detection in time-resolved synchrotron Laue photocrystallography. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:405-413. [PMID: 32153279 PMCID: PMC7064106 DOI: 10.1107/s1600577520000077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
A one-dimensional seed-skewness algorithm adapted for X-ray diffraction signal detection is presented and discussed. The method, primarily designed for photocrystallographic time-resolved Laue data processing, was shown to work well for the type of data collected at the Advanced Photon Source and European Synchrotron Radiation Facility. Nevertheless, it is also applicable in the case of standard single-crystal X-ray diffraction data. The reported algorithm enables reasonable separation of signal from the background in single one-dimensional data vectors as well as the capability to determine small changes of reflection shapes and intensities resulting from exposure of the sample to laser light. Otherwise, the procedure is objective, and relies only on skewness computation and its subsequent minimization. The new algorithm was proved to yield comparable results to the Kruskal-Wallis test method [Kalinowski, J. A. et al. (2012). J. Synchrotron Rad. 19, 637], while the processing takes a similar amount of time. Importantly, in contrast to the Kruskal-Wallis test, the reported seed-skewness approach does not need redundant input data, which allows for faster data collections and wider applications. Furthermore, as far as the structure refinement is concerned, the reported algorithm leads to the excited-state geometry closest to the one modelled using the quantum-mechanics/molecular-mechanics approach reported previously [Jarzembska, K. N. et al. (2014). Inorg. Chem. 53, 10594], when the t and s algorithm parameters are set to the recommended values of 0.2 and 3.0, respectively.
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Affiliation(s)
- Dariusz Szarejko
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Radosław Kamiński
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Piotr Łaski
- Department of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
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14
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Strelnik ID, Sizov VV, Gurzhiy VV, Melnikov AS, Kolesnikov IE, Musina EI, Karasik AA, Grachova EV. Binuclear Gold(I) Phosphine Alkynyl Complexes Templated on a Flexible Cyclic Phosphine Ligand: Synthesis and Some Features of Solid-State Luminescence. Inorg Chem 2019; 59:244-253. [DOI: 10.1021/acs.inorgchem.9b02091] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor D. Strelnik
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center Kazan Scientific Center (FRC KSC), Russian Academy of Sciences (RAS), 420088 Kazan, Russia
| | - Vladimir V. Sizov
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504 Russia
| | - Vladislav V. Gurzhiy
- Institute of Earth Sciences, St. Petersburg State University, St. Petersburg, 199034 Russia
| | - Alexei S. Melnikov
- Centre for Nano- and Biotechnologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Ilya E. Kolesnikov
- Center for Optical and Laser Materials Research, Research Park of St. Petersburg State University, 198504 St. Petersburg, Russia
| | - Elvira I. Musina
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center Kazan Scientific Center (FRC KSC), Russian Academy of Sciences (RAS), 420088 Kazan, Russia
| | - Andrey A. Karasik
- Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center Kazan Scientific Center (FRC KSC), Russian Academy of Sciences (RAS), 420088 Kazan, Russia
| | - Elena V. Grachova
- Institute of Chemistry, St. Petersburg State University, St. Petersburg, 198504 Russia
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15
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Kuang XN, Lin S, Liu JM, Han HL, Liu M, Xin XL, Yang YP, Li ZF, Jin QH, Li SF, Li YX, Feng YB. Heteroleptic Cu(I) complexes with aromatic diimines and phosphines: Synthesis, structure, photophysical properties and THz time domain spectroscopy. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Artem'ev AV, Ryzhikov MR, Berezin AS, Kolesnikov IE, Samsonenko DG, Bagryanskaya IY. Photoluminescence of Ag(i) complexes with a square-planar coordination geometry: the first observation. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00657e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
First examples of square-planar Ag(i) complexes showing MLCT emission are reported. They demonstrate an interesting thermochromic luminescence with the nano- and microsecond lifetime components.
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Affiliation(s)
- Alexander V. Artem'ev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk 630090
- Russian Federation
- Novosibirsk State University
| | - Maxim R. Ryzhikov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk 630090
- Russian Federation
- Novosibirsk State University
| | - Alexey S. Berezin
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk 630090
- Russian Federation
| | - Ilya E. Kolesnikov
- Center for Optical and Laser Materials Research
- Saint Petersburg State University
- Saint Petersburg 198504
- Russian Federation
| | - Denis G. Samsonenko
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk 630090
- Russian Federation
- Novosibirsk State University
| | - Irina Yu. Bagryanskaya
- Novosibirsk State University
- Novosibirsk 630090
- Russian Federation
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- Siberian Branch of Russian Academy of Sciences
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17
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Jarzembska KN, Kamiński R, Dziubek KF, Citroni M, Paliwoda D, Durka K, Fanetti S, Bini R. Impact of High Pressure on Metallophilic Interactions and Its Consequences for Spectroscopic Properties of a Model Tetranuclear Silver(I)-Copper(I) Complex in the Solid State. Inorg Chem 2018; 57:8509-8520. [PMID: 29969254 DOI: 10.1021/acs.inorgchem.8b01196] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structure-property relationships were investigated via combined high-pressure spectroscopic and X-ray diffraction techniques for a model luminescent Ag2Cu2L4 (L = 2-diphenylphosphino-3-methylindole) complex in the crystalline state. The experimental results were contributed by theoretical calculations, compared with the previously evaluated light-induced geometrical changes, and discussed in the context of available literature to date. To the best of our knowledge, this is the first study of this kind devoted to a coinage-metal complex for which the argentophilic interactions are crucial. High-pressure X-ray diffraction and optical spectroscopy experiments showed close correspondence between structural changes and optical properties. The unit-cell angles, absorption edges, emission maxima, decay lifetimes and silver-copper bond trends, all change around 2-3 GPa. A blue-shift to red-shift switch when increasing the pressure was observed for both absorption and emission spectra. This is unique behavior when compared to the literature-reported coinage metal systems. It also occurred that the pressure-induced structural changes differ notably from the geometrical distortions observed for the excited state. Interestingly, shortening of the Ag-Ag bond itself does not ensure the red shift of the absorption and emission spectra. All the optical spectroscopy data are suggestive of an important role of defects, likely related to the lack of a hydrostatic pressure transmitting medium, for pressures higher than 3 GPa.
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Affiliation(s)
- Katarzyna N Jarzembska
- Department of Chemistry , University of Warsaw , Żwirki i Wigury 101 , 02-089 Warsaw , Poland
| | - Radosław Kamiński
- Department of Chemistry , University of Warsaw , Żwirki i Wigury 101 , 02-089 Warsaw , Poland
| | - Kamil F Dziubek
- LENS - European Laboratory for Non-linear Spectroscopy , via N. Carrara 1 , 50019 Sesto Fiorentino , Italy.,Department of Chemistry , Adam Mickiewicz University , Umultowska 89b , 61-614 Poznań , Poland
| | - Margherita Citroni
- LENS - European Laboratory for Non-linear Spectroscopy , via N. Carrara 1 , 50019 Sesto Fiorentino , Italy.,"Ugo Schiff" Department of Chemistry , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy
| | - Damian Paliwoda
- Department of Chemistry , Lehigh University , 6 East Packer Avenue , Bethlehem , Pennsylvania 18015 , United States
| | - Krzysztof Durka
- Department of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland
| | - Samuele Fanetti
- LENS - European Laboratory for Non-linear Spectroscopy , via N. Carrara 1 , 50019 Sesto Fiorentino , Italy.,"Ugo Schiff" Department of Chemistry , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy
| | - Roberto Bini
- LENS - European Laboratory for Non-linear Spectroscopy , via N. Carrara 1 , 50019 Sesto Fiorentino , Italy.,"Ugo Schiff" Department of Chemistry , University of Florence , via della Lastruccia 3 , 50019 Sesto Fiorentino , Italy.,Institute for the Chemistry of Organometallic Compounds , Italian National Council for Research, CNR-ICCOM , via Madonna del Piano 10 , 50019 Sesto Fiorentino , Italy
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18
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Chergui M, Collet E. Photoinduced Structural Dynamics of Molecular Systems Mapped by Time-Resolved X-ray Methods. Chem Rev 2017; 117:11025-11065. [DOI: 10.1021/acs.chemrev.6b00831] [Citation(s) in RCA: 150] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Majed Chergui
- Laboratoire
de Spectroscopie Ultrarapide (LSU), ISIC, and Lausanne Centre for
Ultrafast Science (LACUS), Faculté des Sciences de Base, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
| | - Eric Collet
- Univ Rennes 1, CNRS, Institut de Physique de Rennes, UMR 6251, UBL, Rennes F-35042, France
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19
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Chung TS, Ayitou AJL, Park JH, Breslin VM, Garcia-Garibay MA. Photochemistry and Transmission Pump-Probe Spectroscopy of 2-Azidobiphenyls in Aqueous Nanocrystalline Suspensions: Simplified Kinetics in Crystalline Solids. J Phys Chem Lett 2017; 8:1845-1850. [PMID: 28383895 DOI: 10.1021/acs.jpclett.7b00499] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aqueous nanocrystalline suspensions provide a simple and efficient medium for performing transmission spectroscopy measurements in the solid state. In this Letter we describe the use of laser flash photolysis methods to analyze the photochemistry of 2-azidobiphenyl and several aryl-substituted derivatives. We show that all the crystalline compounds analyzed in this study transform quantitatively into carbazole products via a crystal-to-crystal reconstructive phase transition. While the initial steps of the reaction cannot be followed within the time resolution of our instrument (ca. 8 ns), we detected the primary isocarbazole photoproducts and analyzed the kinetics of their formal 1,5-H shift reactions, which take place in time scales that range from a few nanoseconds to several microseconds. It is worth noting that the high reaction selectivity observed in the crystalline state translates into a clean and simple kinetic process compared to that in solution.
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Affiliation(s)
- Tim S Chung
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Anoklase J-L Ayitou
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Jin H Park
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Vanessa M Breslin
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
| | - Miguel A Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095-1569, United States
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20
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Abstract
Time-resolved X-ray diffraction provides direct information on three-dimensional structures of reacting molecules and thus can be used to elucidate structural dynamics of chemical and biological reactions. In this review, we discuss time-resolved X-ray diffraction on small molecules and proteins with particular emphasis on its application to crystalline (crystallography) and liquid-solution (liquidography) samples. Time-resolved X-ray diffraction has been used to study picosecond and slower dynamics at synchrotrons and can now access even femtosecond dynamics with the recent arrival of X-ray free-electron lasers.
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Affiliation(s)
- Hosung Ki
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea; , , .,Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701, South Korea
| | - Key Young Oang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea; , , .,Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701, South Korea
| | - Jeongho Kim
- Department of Chemistry, Inha University, Incheon 402-751, South Korea;
| | - Hyotcherl Ihee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea; , , .,Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701, South Korea
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21
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Villarreal W, Colina-Vegas L, Visbal G, Corona O, Corrêa RS, Ellena J, Cominetti MR, Batista AA, Navarro M. Copper(I)–Phosphine Polypyridyl Complexes: Synthesis, Characterization, DNA/HSA Binding Study, and Antiproliferative Activity. Inorg Chem 2017; 56:3781-3793. [DOI: 10.1021/acs.inorgchem.6b02419] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Wilmer Villarreal
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Legna Colina-Vegas
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Gonzalo Visbal
- Diretoria de Metrologia
Aplicada às Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, CEP 25250-020 Xerém, RJ, Brazil
- Centro de
Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz - Fiocruz, CEP 21040-361 Rio
de Janeiro, RJ, Brazil
| | - Oscar Corona
- Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Carretera Panamericana Km. 11, Apartado 20632, Altos de Pipe, 1020A Estado Miranda, Venezuela
| | - Rodrigo S. Corrêa
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
- ICEB, Departamento
de Química, Universidade Federal de Ouro Preto, CEP 35400-000 Ouro Preto, MG, Brazil
| | - Javier Ellena
- Instituto de Física de São Carlos, Universidade de São Paulo, CEP 13560-970 São Carlos, SP, Brazil
| | - Marcia Regina Cominetti
- Departamento
de Gerontología, Universidade Federal de São Carlos, CEP
13565-905 São Carlos, SP, Brazil
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Maribel Navarro
- Diretoria de Metrologia
Aplicada às Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, CEP 25250-020 Xerém, RJ, Brazil
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22
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Durini S, Ardizzoia GA, Therrien B, Brenna S. Tuning the fluorescence emission in mononuclear heteroleptic trigonal silver(i) complexes. NEW J CHEM 2017. [DOI: 10.1039/c6nj04058f] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mononuclear heteroleptic trigonal planar silver(i) complexes have been prepared and characterized, both in solution and in the solid state. Their luminescent behavior was investigated, showing a tunable emission maxima according to the electronic properties of the phosphorous ligand, in the solid state.
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Affiliation(s)
- Sara Durini
- Universität Leipzig
- Fakultät für Chemie und Mineralogie
- Institut für Anorganische Chemie
- D-04103 Leipzig
- Germany
| | - G. Attilio Ardizzoia
- Department of Science and High Technology and CIRCC
- University of Insubria
- 22100 Como
- Italy
| | - Bruno Therrien
- Institute of Chemistry
- University of Neuchâtel
- CH-2000 Neuchâtel
- Switzerland
| | - Stefano Brenna
- Department of Science and High Technology and CIRCC
- University of Insubria
- 22100 Como
- Italy
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23
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Kakizoe D, Nishikawa M, Fujii Y, Tsubomura T. Photophysical properties of three coordinated copper(i) complexes bearing 1,10-phenanthroline and a monodentate phosphine ligand. Dalton Trans 2017; 46:14804-14811. [DOI: 10.1039/c7dt02938a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three-coordinated emissive copper(i) complexes bearing 1,10-phenanthroline and monodentate phosphine ligands were synthesized. Copper(i) complexes bearing a crowded phosphine ligand show relatively strong luminescence even in solution.
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Affiliation(s)
- Daichi Kakizoe
- Department of Materials and Life Science
- Seikei University
- Tokyo 180-8633
- Japan
| | - Michihiro Nishikawa
- Department of Materials and Life Science
- Seikei University
- Tokyo 180-8633
- Japan
| | - Yasuo Fujii
- Department of Materials and Life Science
- Seikei University
- Tokyo 180-8633
- Japan
| | - Taro Tsubomura
- Department of Materials and Life Science
- Seikei University
- Tokyo 180-8633
- Japan
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24
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Ren Z, Yang X. Angular-split/temporal-delay approach to ultrafast protein dynamics at XFELs. Acta Crystallogr D Struct Biol 2016; 72:871-82. [PMID: 27377384 PMCID: PMC6688658 DOI: 10.1107/s2059798316008573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 05/27/2016] [Indexed: 11/10/2022] Open
Abstract
X-ray crystallography promises direct insights into electron-density changes that lead to and arise from structural changes such as electron and proton transfer and the formation, rupture and isomerization of chemical bonds. The ultrashort pulses of hard X-rays produced by free-electron lasers present an exciting opportunity for capturing ultrafast structural events in biological macromolecules within femtoseconds after photoexcitation. However, shot-to-shot fluctuations, which are inherent to the very process of self-amplified spontaneous emission (SASE) that generates the ultrashort X-ray pulses, are a major source of noise that may conceal signals from structural changes. Here, a new approach is proposed to angularly split a single SASE pulse and to produce a temporal delay of picoseconds between the split pulses. These split pulses will allow the probing of two distinct states before and after photoexcitation triggered by a laser pulse between the split X-ray pulses. The split pulses originate from a single SASE pulse and share many common properties; thus, noise arising from shot-to-shot fluctuations is self-canceling. The unambiguous interpretation of ultrafast structural changes would require diffraction data at atomic resolution, as these changes may or may not involve any atomic displacement. This approach, in combination with the strategy of serial crystallography, offers a solution to study ultrafast dynamics of light-initiated biochemical reactions or biological processes at atomic resolution.
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Affiliation(s)
- Zhong Ren
- Renz Research Inc., Westmont, IL 60559, USA
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Xiaojing Yang
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA
- Department of Ophthalmology and Vision Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA
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25
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Fournier B, Sokolow J, Coppens P. Analysis of multicrystal pump-probe data sets. II. Scaling of ratio data sets. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 2016; 72:250-60. [PMID: 26919377 DOI: 10.1107/s2053273315024055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 12/14/2015] [Indexed: 11/10/2022]
Abstract
Two methods for scaling of multicrystal data collected in time-resolved photocrystallography experiments are discussed. The WLS method is based on a weighted least-squares refinement of laser-ON/laser-OFF intensity ratios. The other, previously applied, is based on the average absolute system response to light exposure. A more advanced application of these methods for scaling within a data set, necessary because of frequent anisotropy of light absorption in crystalline samples, is proposed. The methods are applied to recently collected synchrotron data on the tetra-nuclear compound Ag2Cu2L4 with L = 2-diphenylphosphino-3-methylindole. A statistical analysis of the weighted least-squares refinement residual terms is performed to test the importance of the scaling procedure.
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Affiliation(s)
- Bertrand Fournier
- Chemistry Department, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Jesse Sokolow
- Chemistry Department, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Philip Coppens
- Chemistry Department, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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26
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Ayitou AJL, Flynn K, Jockusch S, Khan SI, Garcia-Garibay MA. Structure–Kinetics Correlations in Isostructural Crystals of α-(ortho-Tolyl)-acetophenones: Pinning Down Electronic Effects Using Laser-Flash Photolysis in the Solid State. J Am Chem Soc 2016; 138:2644-8. [DOI: 10.1021/jacs.5b11657] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anoklase J.-L. Ayitou
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
| | - Kristen Flynn
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
| | - Steffen Jockusch
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Saeed I. Khan
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
| | - Miguel A. Garcia-Garibay
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
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27
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Kim J, Kim KH, Oang KY, Lee JH, Hong K, Cho H, Huse N, Schoenlein RW, Kim TK, Ihee H. Tracking reaction dynamics in solution by pump–probe X-ray absorption spectroscopy and X-ray liquidography (solution scattering). Chem Commun (Camb) 2016; 52:3734-49. [DOI: 10.1039/c5cc08949b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TRXL and TRXAS are powerful techniques for real-time probing of structural and electronic dynamics of photoinduced reactions in solution phase.
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28
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Coppens P, Fournier B. On the scaling of multicrystal data sets collected at high-intensity X-ray and electron sources. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2015; 2:064101. [PMID: 26798829 PMCID: PMC4720110 DOI: 10.1063/1.4935526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/30/2015] [Indexed: 06/05/2023]
Abstract
The need for data-scaling has become increasingly evident as time-resolved pump-probe photocrystallography is rapidly developing at high intensity X-ray sources. Several aspects of the scaling of data sets collected at synchrotrons, XFELs (X-ray Free Electron Lasers) and high-intensity pulsed electron sources are discussed. They include laser-ON/laser-OFF data scaling, inter- and intra-data set scaling.
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Affiliation(s)
- Philip Coppens
- Chemistry Department, University at Buffalo, State University of New York , Buffalo, New York 14260-3000, USA
| | - Bertrand Fournier
- Chemistry Department, University at Buffalo, State University of New York , Buffalo, New York 14260-3000, USA
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29
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Synthesis, structure, characterization and luminescent properties of copper(I) complexes based on bis-diimine bridging ligands. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.07.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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30
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Krytchankou IS, Koshevoy IO, Gurzhiy VV, Pomogaev VA, Tunik SP. Luminescence Solvato- and Vapochromism of Alkynyl-Phosphine Copper Clusters. Inorg Chem 2015; 54:8288-97. [DOI: 10.1021/acs.inorgchem.5b00239] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ilya S. Krytchankou
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russia
| | - Igor O. Koshevoy
- University of Eastern Finland, Department of Chemistry, 80101 Joensuu, Finland
| | - Vladislav V. Gurzhiy
- St. Petersburg State University, Institute of Earth Sciences, Universitetskaya nab. 7-9, 199034 St. Petersburg, Russia
| | - Vladimir A. Pomogaev
- St. Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russia
- Tomsk State University, Lenina pr. 36, 634050 Tomsk, Russia
| | - Sergey P. Tunik
- University of Eastern Finland, Department of Chemistry, 80101 Joensuu, Finland
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31
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Coppens P, Fournier B. New methods in time-resolved Laue pump-probe crystallography at synchrotron sources. JOURNAL OF SYNCHROTRON RADIATION 2015; 22:280-287. [PMID: 25723930 PMCID: PMC4344360 DOI: 10.1107/s1600577514026538] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 12/02/2014] [Indexed: 06/04/2023]
Abstract
Newly developed methods for time-resolved studies using the polychromatic and in particular the pink-Laue technique, suitable for medium and small-size unit cells typical in chemical crystallography, are reviewed. The order of the sections follows that of a typical study, starting with a description of the pink-Laue technique, followed by the strategy of data collection for analysis with the RATIO method. Novel procedures are described for spot integration, orientation matrix determination for relatively sparse diffraction patterns, scaling of multi-crystal data sets, use of Fourier maps for initial assessment and analysis of results, and least-squares refinement of photo-induced structural and thermal changes. In the calculation of Fourier maps a ground-state structure model, typically based on monochromatic results, is employed as reference, and the laser-ON structure factors for the Fourier summations are obtained by multiplying the reference ground-state structure factors by the square root of the experimental ON/OFF ratios. A schematic of the procedure followed is included in the conclusion section.
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Affiliation(s)
- Philip Coppens
- Chemistry Department, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Bertrand Fournier
- Chemistry Department, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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32
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Coppens P. Perspective: On the relevance of slower-than-femtosecond time scales in chemical structural-dynamics studies. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2015; 2:020901. [PMID: 26798788 PMCID: PMC4711614 DOI: 10.1063/1.4913362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 02/09/2015] [Indexed: 05/17/2023]
Abstract
A number of examples illustrate structural-dynamics studies of picosecond and slower photo-induced processes. They include molecular rearrangements and excitations. The information that can be obtained from such studies is discussed. The results are complementary to the information obtained from femtosecond studies. The point is made that all pertinent time scales should be covered to obtain comprehensive insight in dynamic processes of chemical and biological importance.
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Affiliation(s)
- Philip Coppens
- Chemistry Department, University at Buffalo , SUNY, Buffalo, New York 14260-3000, USA
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33
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Rajput G, Yadav MK, Drew MGB, Singh N. Impact of Ligand Framework on the Crystal Structures and Luminescent Properties of Cu(I) and Ag(I) Clusters and a Coordination Polymer Derived from Thiolate/Iodide/dppm Ligands. Inorg Chem 2015; 54:2572-9. [DOI: 10.1021/ic502688h] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Gunjan Rajput
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| | - Manoj Kumar Yadav
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| | - Michael G. B. Drew
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Nanhai Singh
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
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34
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Huang TH, Yan J, Liu YF, Xie YT, Jia C. Synthesis, Structural Characterisation, and Spectroscopic Properties of Copper(I) Complexes and their Applications to Dye-Sensitised Solar Cells. Aust J Chem 2015. [DOI: 10.1071/ch14562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Based on the ligand 1,4-bis(2-(diphenylphophino)benzylideneamino)benzene (pbb), two complexes, [Cu2(pbb)(2,2′-bipyridine)2](BF4)2 (1) and [Cu2(pbb)(phen)2](BF4)2 (2), have been prepared and characterised by IR, 1H NMR, 31P NMR, 19F NMR, and 11B NMR spectroscopy and X-ray crystal structure analysis. Structural analysis reveals that complexes 1 and 2 contain 1D infinite chains and 2D supramolecular networks constructed by C–H···π and π···π interactions, and an ordered-layer-lattice of BF4– is located between these 2D networks. The results show that C–H···π and π···π interactions play an important role in the formation of 2D supramolecular networks. The UV-vis absorption peaks of complexes 1 and 2 display intraligand charge transfer and metal to ligand charge transfer (MLCT) absorption. Complexes 1 and 2 display efficient luminescent emission assigned to MLCT excited states, and the maximum emissions of these complexes in acetonitrile solution are different from those of the solid-state samples. In addition, complexes 1 and 2 have been exploited as sensitisers in dye-sensitised solar cells, and efficiencies are also observed.
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35
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Powers D, Anderson BL, Hwang SJ, Powers TM, Pérez LM, Hall MB, Zheng SL, Chen YS, Nocera DG. Photocrystallographic observation of halide-bridged intermediates in halogen photoeliminations. J Am Chem Soc 2014; 136:15346-55. [PMID: 25264809 PMCID: PMC4227815 DOI: 10.1021/ja508218v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Indexed: 12/19/2022]
Abstract
Polynuclear transition metal complexes, which frequently constitute the active sites of both biological and chemical catalysts, provide access to unique chemical transformations that are derived from metal-metal cooperation. Reductive elimination via ligand-bridged binuclear intermediates from bimetallic cores is one mechanism by which metals may cooperate during catalysis. We have established families of Rh2 complexes that participate in HX-splitting photocatalysis in which metal-metal cooperation is credited with the ability to achieve multielectron photochemical reactions in preference to single-electron transformations. Nanosecond-resolved transient absorption spectroscopy, steady-state photocrystallography, and computational modeling have allowed direct observation and characterization of Cl-bridged intermediates (intramolecular analogues of classical ligand-bridged intermediates in binuclear eliminations) in halogen elimination reactions. On the basis of these observations, a new class of Rh2 complexes, supported by CO ligands, has been prepared, allowing for the isolation and independent characterization of the proposed halide-bridged intermediates. Direct observation of halide-bridged structures establishes binuclear reductive elimination as a viable mechanism for photogenerating energetic bonds.
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Affiliation(s)
- David
C. Powers
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
| | - Bryce L. Anderson
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
| | - Seung Jun Hwang
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
| | - Tamara M. Powers
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
| | - Lisa M. Pérez
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Michael B. Hall
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Shao-Liang Zheng
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
| | - Yu-Sheng Chen
- ChemMatCARS, The University of Chicago, Argonne, Illinois 60439, United States
| | - Daniel G. Nocera
- Department
of Chemistry and Chemical Biology, Harvard
University, 12 Oxford
Street, Cambridge, Massachusetts 02138, United States
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36
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Jarzembska KN, Kamiński R, Fournier B, Trzop E, Sokolow JD, Henning R, Chen Y, Coppens P. Shedding light on the photochemistry of coinage-metal phosphorescent materials: a time-resolved Laue diffraction study of an Ag(I)-Cu(I) tetranuclear complex. Inorg Chem 2014; 53:10594-601. [PMID: 25238405 PMCID: PMC4315237 DOI: 10.1021/ic501696y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The triplet excited state of a new crystalline form of a tetranuclear coordination d(10)-d(10)-type complex, Ag2Cu2L4 (L = 2-diphenylphosphino-3-methylindole ligand), containing Ag(I) and Cu(I) metal centers has been explored using the Laue pump-probe technique with ≈80 ps time resolution. The relatively short lifetime of 1 μs is accompanied by significant photoinduced structural changes, as large as the Ag1···Cu2 distance shortening by 0.59(3) Å. The results show a pronounced strengthening of the argentophilic interactions and formation of new Ag···Cu bonds on excitation. Theoretical calculations indicate that the structural changes are due to a ligand-to-metal charge transfer (LMCT) strengthening the Ag···Ag interaction, mainly occurring from the methylindole ligands to the silver metal centers. QM/MM optimizations of the ground and excited states of the complex support the experimental results. Comparison with isolated molecule optimizations demonstrates the restricting effect of the crystalline matrix on photoinduced distortions. The work represents the first time-resolved Laue diffraction study of a heteronuclear coordination complex and provides new information on the nature of photoresponse of coinage metal complexes, which have been the subject of extensive studies.
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Affiliation(s)
- Katarzyna N. Jarzembska
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
- Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland
| | - Radosław Kamiński
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Bertrand Fournier
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Elżbieta Trzop
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Jesse D. Sokolow
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Robert Henning
- Consortium for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, United States
| | - Yang Chen
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Philip Coppens
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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37
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Hatcher LE, Raithby PR. Dynamic single-crystal diffraction studies using synchrotron radiation. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.02.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Kamiński R, Nottingham G, Coppens P. An optical chopper for generation of short X-ray pulses to allow in-house time-resolved photocrystallography. J Appl Crystallogr 2014. [DOI: 10.1107/s160057671401961x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
As part of a project to implement in-house time-resolved diffraction of short-lifetime species, a fast shutter with a custom-designed enclosure has been installed. The device is suitable for generation of X-ray pulses with time lengths down to about 5 µs. The design does not require major modifications to commercially available diffractometer setups. Significant airflow, generated by the rotating chopper disc, which interferes with temperature control at the sample, has been eliminated by a compact enclosure, which does not interfere with sample monitoring and conditioning devices. It allows for full rotation of the diffractometer circles.
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39
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Berenguer JR, Lalinde E, Martín A, Moreno MT, Ruiz S, Sánchez S, Shahsavari HR. Photophysical Responses in Pt2Pb Clusters Driven by Solvent Interactions and Structural Changes in the PbII Environment. Inorg Chem 2014; 53:8770-85. [DOI: 10.1021/ic501458q] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jesús R. Berenguer
- Departamento de
Quı́mica-Centro de Sı́ntesis Quı́mica
de La Rioja (CISQ), Universidad de La Rioja, Madre de Dios, 51, 26006 Logroño, Spain
| | - Elena Lalinde
- Departamento de
Quı́mica-Centro de Sı́ntesis Quı́mica
de La Rioja (CISQ), Universidad de La Rioja, Madre de Dios, 51, 26006 Logroño, Spain
| | - Antonio Martín
- Departamento de Quı́mica Inorgánica,
Instituto de Ciencia de Materiales de Aragón, Facultad de Ciencias, Universidad de Zaragoza-CSIC, Plaza S. Francisco s/n 50009 Zaragoza, Spain
| | - M. Teresa Moreno
- Departamento de
Quı́mica-Centro de Sı́ntesis Quı́mica
de La Rioja (CISQ), Universidad de La Rioja, Madre de Dios, 51, 26006 Logroño, Spain
| | - Santiago Ruiz
- Departamento de
Quı́mica-Centro de Sı́ntesis Quı́mica
de La Rioja (CISQ), Universidad de La Rioja, Madre de Dios, 51, 26006 Logroño, Spain
| | - Sergio Sánchez
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Hamid R. Shahsavari
- Departamento de
Quı́mica-Centro de Sı́ntesis Quı́mica
de La Rioja (CISQ), Universidad de La Rioja, Madre de Dios, 51, 26006 Logroño, Spain
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40
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Dau MT, Shakirova JR, Karttunen AJ, Grachova EV, Tunik SP, Melnikov AS, Pakkanen TA, Koshevoy IO. Coinage Metal Complexes Supported by the Tri- and Tetraphosphine Ligands. Inorg Chem 2014; 53:4705-15. [DOI: 10.1021/ic500402m] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Minh Thuy Dau
- Department
of Chemistry, University of Eastern Finland, Joensuu, 80101, Finland
| | - Julia R. Shakirova
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504, St. Petersburg, Russia
| | | | - Elena V. Grachova
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504, St. Petersburg, Russia
| | - Sergey P. Tunik
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504, St. Petersburg, Russia
| | - Alexey S. Melnikov
- St. Petersburg State Polytechnical University, Polytechnicheskaya Str. 29, 195251 St. Petersburg, Russia
| | - Tapani A. Pakkanen
- Department
of Chemistry, University of Eastern Finland, Joensuu, 80101, Finland
| | - Igor O. Koshevoy
- Department
of Chemistry, University of Eastern Finland, Joensuu, 80101, Finland
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41
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Jarzembska KN, Chen Y, Nasca JN, Trzop E, Watson DF, Coppens P. Relating structure and photoelectrochemical properties: electron injection by structurally and theoretically characterized transition metal-doped phenanthroline–polyoxotitanate nanoparticles. Phys Chem Chem Phys 2014; 16:15792-5. [DOI: 10.1039/c4cp02509a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Whereas a large number of sensitized polyoxotitanate clusters have been reported, information on the electrochemical properties of the fully structurally and theoretically defined nanoparticles has not been available and is presented here.
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Affiliation(s)
- Katarzyna N. Jarzembska
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
- Department of Chemistry
| | - Yang Chen
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
| | - Justin N. Nasca
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
| | - Elżbieta Trzop
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
| | - David F. Watson
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
| | - Philip Coppens
- Department of Chemistry
- University at Buffalo
- The State University of New York
- Buffalo, USA
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42
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Huang TH, Zhang MH. Syntheses, Structures, Characterisation, and Spectroscopic Properties of CuI and AgI Complexes with Extended C–H···π and π···π Interactions. Aust J Chem 2014. [DOI: 10.1071/ch13566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Based on the ligands N,N′-bis(pyridin-2-ylmethylene)benzene-1,4-diamine (pmb) and N,N′-bis(pyridin-2-ylmethylene)biphenyl-4,4′-diamine (pmbb), the three compounds [Cu2(pmb) (PPh3)2(Cl)2] (1), [Cu2(pmbb)(CH3CN)2(PPh3)2](BF4)2·2DMF (2), and [Ag2(pmbb)(PPh3)2] (ClO4)2 (3) have been synthesised and characterised. Structural analysis reveals that all of these complexes contain 1D supramolecular arrays, with different variations in π-stacking patterns and intermolecular C–H···π interactions. Crystal structures of 1 and 2 contain 1D tape-like arrays formed by C–H···π and π···π interactions, and an ordered-layer-lattice of DMF and BF4– in 2 is located between the one-dimensional array. For 3, π-stacking interactions lead to the construction of 1D supramolecular arrays and a 2D network. The results indicate that C–H···π and π···π interactions play an important role in the construction of the supramolecular structure. In addition, the absorption peaks of complexes 1 and 3 in the solid state at room temperature show intraligand charge transfer and metal-to-ligand charge transfer absorptions. The optical and fluorescent properties of 2 were also studied in acetonitrile solution at room temperature.
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43
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Vinogradova KA, Plyusnin VF, Kupryakov AS, Rakhmanova MI, Pervukhina NV, Naumov DY, Sheludyakova LA, Nikolaenkova EB, Krivopalov VP, Bushuev MB. Halide impact on emission of mononuclear copper(i) complexes with pyrazolylpyrimidine and triphenylphosphine. Dalton Trans 2014; 43:2953-60. [DOI: 10.1039/c3dt53040j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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44
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Hatcher LE, Bigos EJ, Bryant MJ, MacCready EM, Robinson TP, Saunders LK, Thomas LH, Beavers CM, Teat SJ, Christensen J, Raithby PR. Thermal and photochemical control of nitro–nitrito linkage isomerism in single-crystals of [Ni(medpt)(NO2)(η2-ONO)]. CrystEngComm 2014. [DOI: 10.1039/c4ce00675e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Ni(medpt)(NO2)(η2-ONO)] displays an equilibrium between the η1-NO2 and the η1-ONO linkage isomers between 150–298 K; upon photoactivation at 100 K the percentage of the η1-ONO isomer increases.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Simon J. Teat
- Advanced Light Source
- Lawrence Berkeley National Laboratory
- Berkeley, USA
| | | | - Paul R. Raithby
- Department of Chemistry
- University of Bath
- Bath, UK
- Research Complex at Harwell
- Rutherford Appleton Laboratory
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45
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Kamiński R, Domagała S, Jarzembska KN, Hoser AA, Sanjuan-Szklarz WF, Gutmann MJ, Makal A, Malińska M, Bąk JM, Woźniak K. Statistical analysis of multipole-model-derived structural parameters and charge-density properties from high-resolution X-ray diffraction experiments. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 2013; 70:72-91. [DOI: 10.1107/s2053273313028313] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 10/15/2013] [Indexed: 11/10/2022]
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46
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Zink DM, Baumann T, Friedrichs J, Nieger M, Bräse S. Copper(I) Complexes Based on Five-Membered P∧N Heterocycles: Structural Diversity Linked to Exciting Luminescence Properties. Inorg Chem 2013; 52:13509-20. [DOI: 10.1021/ic4019162] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Daniel M. Zink
- Cynora GmbH, Hermann-von-Helmholtz-Platz
1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Thomas Baumann
- Cynora GmbH, Hermann-von-Helmholtz-Platz
1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Jana Friedrichs
- Cynora GmbH, Hermann-von-Helmholtz-Platz
1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Martin Nieger
- Laboratory of Inorganic
Chemistry, Department
of Chemistry, University of Helsinki, P.O. Box 55 (A.I. Virtasenaukio
1), FIN-00014 University of Helsinki, Finland
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, KIT Campus South, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
- Karlsruhe Institute of Technology (KIT), Institute
of Toxicology and Genetics, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
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47
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Kamiński R, Jarzembska KN, Domagała S. CLUSTERGEN: a program for molecular cluster generation from crystallographic data. J Appl Crystallogr 2013. [DOI: 10.1107/s0021889813002173] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A new program,CLUSTERGEN, for molecular cluster generation is introduced.CLUSTERGENprovides the quantum mechanics/molecular mechanics (QM/MM) input files for program packages such asADF[Baerendset al.(2012). Vrije Universiteit, Amsterdam, The Netherlands] andGAUSSIAN[Frischet al.(2009). Gaussian Inc., Pittsburgh, Pennsylvania, USA]. Additionally, it prints out a standardCRYSTAL[Dovesiet al.(2009). University of Turin, Italy] input and, in general, facilitates file-format manipulation. TheCLUSTERGENprogram is supported by an extensive manual and a user-friendly graphical interface. The code is freely available and carefully commented, which makes it easily modifiable. Exemplary applications ofCLUSTERGENconcerning QM/MM calculations and derivation of nucleus-independent chemical shift indices are demonstrated.
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48
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Volz D, Nieger M, Friedrichs J, Baumann T, Bräse S. How the quantum efficiency of a highly emissive binuclear copper complex is enhanced by changing the processing solvent. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3034-3044. [PMID: 23373754 DOI: 10.1021/la3039522] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Polymorphism is often linked to the choice of processing solvents. Packing effects or the preference of one certain conformer as possible causes of this phenomenon are strongly dependent on solvents and especially on their polarity. Even in amorphous solids, the microstructure can be controlled by the choice of solvents. Polymorphs or amorphous solids featuring different packing densities can exhibit different properties in terms of stability or optical effects. The influence of these effects on a binuclear, strongly luminescent copper(I) complex was investigated. Many possible applications for luminescent, amorphous coordination compounds, such as organic light-emitting diodes, sensors, and organic lasers, rely on photophysical properties like quantum efficiency to be repeatable. The effect of processing solvents in this context is often underestimated, but very relevant for utilization in device manufacturing and should therefore be understood more deeply. In this work, theoretical derivations, DFT calculations, X-ray-diffraction, photoluminescence spectroscopy, and the time-dependent single-photon-counting-technique (TDSPC) were used to understand this phenomenon more deeply. The influence of five different solvents on Cu2I2(MePyrPHOS)3 was probed. This resulted in a modulation of the photoluminescence quantum yield ϕ between 0.5 and 0.9 in amorphous solid state. A new polymorph of the material with slightly reduced values for ϕ has been identified. The reduced efficiency could be correlated with a higher porosity and a reduced packing density. Dense packing reduces nonradiative decay by geometrical fixation and thus increases the quantum efficiency. The existence of similar effects on aluminum and iridium compounds has been confirmed by application of different processing solvents on Alq3 and Ir(ppy)3. These results show that a tuning of the efficiency of a emissive metal complexes by choosing a proper processing solvent is possible. If highly efficient materials for practical applications are desired, an evaluation of multiple solvents has to be considered.
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Affiliation(s)
- Daniel Volz
- Institut für Organische Chemie, KIT, Karlsruhe, Germany
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49
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Coppens P, Sokolow J, Trzop E, Makal A, Chen Y. On the Biexponential Decay of the Photoluminescence of the Two Crystallographically-Independent Molecules in Crystals of [Cu(I)(phen)(PPh3)2][BF4]. J Phys Chem Lett 2013; 4:579-582. [PMID: 26281869 DOI: 10.1021/jz400013b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
[Cu(I)(phen)(PPh3)2][BF4] crystallizes with two nonsymmetry-related molecules in the asymmetric unit. Synchrotron time-resolved X-ray diffraction experiments have shown that the two independent molecules distort differently on MLCT excitation. The luminescence decay of the crystals is biexponential with two different Stokes-shifts, the more rapid decay corresponding to the shorter wavelength emission. Its amplitude diminishes rapidly with an increase in temperature, indicating that this emission is not due to a thermal activation to a higher state. The double emission is attributed to the presence of two independent molecules with drastically different packing environments. It is concluded that the solid-state environment must be analyzed whenever photochemical properties of molecular solids are reported.
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Affiliation(s)
- Philip Coppens
- Chemistry Department, University at Buffalo, Buffalo, New York 14221, United States
| | - Jesse Sokolow
- Chemistry Department, University at Buffalo, Buffalo, New York 14221, United States
| | - Elzbieta Trzop
- Chemistry Department, University at Buffalo, Buffalo, New York 14221, United States
| | - Anna Makal
- Chemistry Department, University at Buffalo, Buffalo, New York 14221, United States
| | - Yang Chen
- Chemistry Department, University at Buffalo, Buffalo, New York 14221, United States
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