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Sewell J, Sathish R, Epa DS, Lewicki M, Amos L, Teh E, Popp L, Jaw J, Davis GA, Chin R. Rothia aeria vertebral discitis/osteomyelitis in an immunocompetent adult: case report and literature review. IDCases 2022; 27:e01459. [PMID: 35242563 PMCID: PMC8885571 DOI: 10.1016/j.idcr.2022.e01459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 02/19/2022] [Accepted: 02/20/2022] [Indexed: 10/26/2022] Open
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Abstract
Density is the key quantity for nearly all the numerous theories of the (dynamic) glass transition of supercooled liquids and melts. As mean field quantity, it is used to describe correlations and heterogeneities between regions consisting of several molecules. In contrast, the question how density is created by the interactions (i.e., bonds) within a molecule and to its nearest neighbors is almost unexplored. To investigate this for the example of a homologous series of polyalcohols (glycerol, threitol, xylitol, and sorbitol), Fourier-Transform InfraRed (FTIR) spectroscopy is carried out in a wide range of temperatures from far above to far below the calorimetric glass transition Tg. This enables us to determine the potentials and hence the bond lengths of specific intramolecular and intermolecular interactions. While the former has an expansion coefficient of (∼0.1 pm/100 K) with only smooth changes, the latter shows a 30-40 times stronger response with pronounced kinks at Tg. A comparison with the overall expansion based on mass density reveals that one has to separate between strong (OH⋅⋅⋅O) and weak (CH⋅⋅⋅O) intermolecular hydrogen (H)-bridges. Despite the fact that the latter dominates glassy dynamics, their expansivity is 5 times smaller than that of the weak H-bridges. It is to be expected that such heterogeneities on intramolecular and intermolecular scales are a general phenomenon in liquids and glassy systems demonstrating especially the necessity of atomistic simulations.
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Affiliation(s)
- Jan Philipp Gabriel
- Peter Debye Institute for Soft Matter Research, Leipzig University, 04103 Leipzig, Germany
| | - Martin Tress
- Peter Debye Institute for Soft Matter Research, Leipzig University, 04103 Leipzig, Germany
| | - Wilhelm Kossack
- Peter Debye Institute for Soft Matter Research, Leipzig University, 04103 Leipzig, Germany
| | - Ludwig Popp
- Peter Debye Institute for Soft Matter Research, Leipzig University, 04103 Leipzig, Germany
| | - Friedrich Kremer
- Peter Debye Institute for Soft Matter Research, Leipzig University, 04103 Leipzig, Germany
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Scholz R, Kleine P, Lygaitis R, Popp L, Lenk S, Etherington MK, Monkman AP, Reineke S. Investigation of Thermally Activated Delayed Fluorescence from a Donor-Acceptor Compound with Time-Resolved Fluorescence and Density Functional Theory Applying an Optimally Tuned Range-Separated Hybrid Functional. J Phys Chem A 2020; 124:1535-1553. [PMID: 32024366 DOI: 10.1021/acs.jpca.9b11083] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Emitters showing thermally activated delayed fluorescence (TADF) in electroluminescent devices rely on efficient reverse intersystem crossing (rISC) arising from small thermal activation barriers between the lowest excited triplet and singlet manifolds. A small donor-acceptor compound consisting of a demethylacridine donor and a methylbenzoate acceptor group is used as a model TADF emitter. The spectroscopic signatures of this system are characterized using a combination of photoluminescence and photoluminescence excitation, and the photoluminescence decay dynamics are recorded between delays of 2 ns and 20 ms. Above T = 200 K, our data provide convincing evidence for TADF at intermediate delays in the microsecond range, whereas triplet-triplet annihilation and slow triplet decay at later times can be observed over the entire temperature range from T = 80 K to room temperature. Moreover, close to room temperature, we find a second and faster up-conversion mechanism, tentatively assigned to reverse internal conversion between different triplet configurations. An interpretation of these experimental findings requires a calculation of the deformation patterns and potential minima of several electronic configurations. This task is performed with a range-separated hybrid functional, outperforming standard density functionals or global hybrids. In particular, the systematic underestimation of the energy of charge transfer (CT) states with respect to local excitations within the constituting chromophores is replaced by more reliable transition energies for both kinds of excitations. Hence, several absorption and emission features can be assigned unambiguously, and the observed activation barriers for rISC and reverse internal conversion correspond to calculated energy differences between the potential surfaces in different electronic configurations.
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Affiliation(s)
- Reinhard Scholz
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany.,Leibniz Institute of Polymer Research Dresden , P.O. Box 120 411, 01005 Dresden , Germany
| | - Paul Kleine
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
| | - Ramunas Lygaitis
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany.,Department of Organic Technology , Kaunas University of Technology , Radvilenu Plentas 19 , LT 3028 Kaunas , Lithuania
| | - Ludwig Popp
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
| | - Simone Lenk
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
| | - Marc K Etherington
- Organic Electroactive Materials Research Group, Physics Department , Durham University , South Road , Durham DH1 3LE , United Kingdom.,Department of Mathematics, Physics & Electrical Engineering , Northumbria University , Ellison Place , Newcastle upon Tyne NE1 8ST , United Kingdom
| | - Andrew P Monkman
- Organic Electroactive Materials Research Group, Physics Department , Durham University , South Road , Durham DH1 3LE , United Kingdom
| | - Sebastian Reineke
- Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
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Popp L, Scheidhauer H. Cyriax’ „Gesäßzeichen”. physioscience 2010. [DOI: 10.1055/s-0029-1245137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Truong A, Wang M, Harris V, Aziz N, Grabell J, Popp L, Amoozgar M, Hahn S, Pereira D, Young D. 520 POSTER A monoclonal antibody targeting Trop-2 exhibits anti-tumor efficacy in human cancer models as a monotherapy and demonstrates efficacy in combination therapy. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)72454-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Hahn SE, da Cruz LA, Gupta A, Mak B, Popp L, Pereira DS, Rubinstein DB, Young DS. Clinical development of huARH460–16–2: A therapeutic antibody targeting the CD44 cancer stem cell antigen on high-incidence adenocarcinomas. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.14581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Santjer T, Popp L, de Wit M. Reflections about nursing during highly aggressive chemotherapy especially in peripheral blood stem cell transplantation. Eur J Cancer 1997. [DOI: 10.1016/s0959-8049(97)86358-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Popp L. Die Fleckfieber-Epidemie in Kulmbach im Jahre 1793. Medizinhist J 1981; 16:257-269. [PMID: 11610941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Popp L. [Determination of gestational age using ultrasound with special reference to the measurement of the fetal crown-coccyx length (proceedings)]. Arch Gynakol 1977; 224:93-4. [PMID: 579957 DOI: 10.1007/bf00679449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Popp L. [Salmonella and natural purification of polluted waters (author's transl)]. Zentralbl Bakteriol Orig B 1974; 158:432-5. [PMID: 4598600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Popp L. [Elimination of salmonellae by biological treatment of waste-water]. Zentralbl Bakteriol Orig B 1973; 157:184-95. [PMID: 4581889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Popp L. [Sexbound immunological differcies in tuberculosis]. Z Immunitatsforsch Exp Klin Immunol 1971; 142:318-33. [PMID: 4257658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Popp L. Significance of Middlebrook-Dubos and Middlebrook antibodies in tuberculosis. Am Rev Respir Dis 1971; 104:267-71. [PMID: 5105213 DOI: 10.1164/arrd.1971.104.2.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Popp L. [On a CW and Duffy-problem child]. Blut 1969; 19:146-51. [PMID: 5794904 DOI: 10.1007/bf01631129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Popp L. Bewährte Methoden in der Mikrobiologie. Gustav Fischer Verlag, Stuttgart 1963. Heft 1:17 Seiten, Preis DM 3,40.- Heft 2:28 Seiten, Preis DM 5,60. Arch Pharm (Weinheim) 1964. [DOI: 10.1002/ardp.19642970711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Popp L. Tierexperimentelle Untersuchungen Über das Wesen der Hämagglutinations-Hämolyse-Reaktion (Middlebrook-Dubos). Med Microbiol Immunol 1955. [DOI: 10.1007/bf02162133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Popp L. Quantitativ-bakteriologische Grundlagen der Chlorung von Trinkwasser. Arch Pharm (Weinheim) 1951. [DOI: 10.1002/ardp.19512840527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Popp L. Zur Lokalbehandlung der weiblichen Gonorrhoe. Gynecol Obstet Invest 1938. [DOI: 10.1159/000311593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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