119,914 research outputs found
From self assembled monolayers to clickable gold nanoparticles
No full textThe aim of the present PhD thesis was the investigation of the behavior of gold nanoparticle stabilizing oligo thioether ligands on gold surfaces and further on to develop a protocol for the directed assembly of mono functionalized gold nanoparticle into defined oligomer structures.
Outline
The present cumulative PhD thesis consists of the following parts:
In the Introduction the research field of gold nanoparticles is presented with to point out their unique electronic and physical properties. The second focus will be on the controlled interlinking and functionalization of gold nanoparticles using click chemistry and their potential applications, which will be submitted as a review article.
Within Concept and Strategy the goals of the research project are introduced and the concepts and outputs of the resulting publications are presented.
The Publications are accumulated with their respective Supporting Information, in the order in which they were prepared:
“Loops versus Stems: Benzylic Sulfide Oligomers Forming Carpet Type Monolayers“ F. Sander, T. Peterle, N. Ballav, F. Wrochem, M. Zharnikov, M. Mayor J. Phys. Chem. C, 2010, 114, 4118 – 4125.
“Add a Third Hook: S-Acetyl Protected Oligophenylene Pyridine Dithiols as Advanced Precursors for Self-Assembled Monolayers“ F. Sander, J. P. Hermes, M. Mayor, H. Hamoudi, M. Zharnikov PCCP, 2013, 15, 2836 – 2846.
“Dumbbells, Trikes and Quads - Click Gold Nanopartricles together“ F. Sander, U. Fluch, J. P. Hermes and M. Mayor Small 2014, 10, 349 – 359.
“Click Chemistry with Gold Nanoparticles – A Tool for Functionalization, Interlinking and Labeling” Fabian Sander and Marcel Mayor, manuscript prepared for submission.
Finally, within Conclusion and Outlook the main results are briefly summarized and further potential research is proposed
Sander, F H (Frederick Herbert), VX28151
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/415218Surname: SANDER. Given Name(s) or Initials: F H (FREDERICK HERBERT). Military Service Number or Last Known Location: VX28151. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 42289.235640
Item: [2016.0049.47479] "Sander, F H (Frederick Herbert), VX28151
Carboxylation of carbenes in low-temperature matrixes
No full textPT: J; CR: ADAM W, 1971, J AM CHEM SOC, V93, P557 ADAM W, 1973, J ORG CHEM, V38, P2269 BAMFORD WR, 1952, J CHEM SOC, P4735 BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 CHAMPAM OL, 1972, J AM CHEM SOC, V94, P1365 COE PL, 1982, J CHEM SOC CHEM COMM, P362 EISENTHAL KB, 1985, TETRAHEDRON, V41, P1543 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GOULD IR, 1985, TETRAHEDRON, V41, P1587 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1985, TETRAHEDRON, V41, P1525 LIU MTH, 1980, J CHEM SOC CHEM COMM, P1482 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 MALTSEV AK, 1985, IAN SSSR KH, P2159 MCMAHON RJ, 1987, J AM CHEM SOC, V109, P2456 MILLIGAN DE, 1962, J CHEM PHYS, V35, P2911 MOSS RA, 1989, ACCOUNTS CHEM RES, V22, P15 PLATZ MS, 1990, KINETICS SPECTROSCOP, P239 PUZA M, 1971, SYNTHESIS-STUTTGART, P481 SANDER W, 1988, ANGEW CHEM INT EDIT, V27, P572 SANDER W, 1988, ANGEW CHEM, V100, P577 SANDER W, 1988, J ORG CHEM, V53, P2091 SANDER W, 1990, ANGEW CHEM INT EDIT, V29, P344 SANDER W, 1990, ANGEW CHEM, V102, P362 SANDER WW, 1987, SPECTROCHIM ACTA A, V43, P637 SANDER WW, 1989, J ORG CHEM, V54, P333 SANDER WW, 1989, J ORG CHEM, V54, P4265 SIEBRAND W, 1986, ACCOUNTS CHEM RES, V19, P238 WHELAND R, 1970, J AM CHEM SOC, V92, P6057; NR: 29; TC: 22; J9: J ORG CHEM; PG: 3; GA: HB875Source type: Electronic(1
1, 2-H shift in benzylchlorocarbene: isotope effect and influence of the solvent
No full textLaser flash photolysis of 3-chloro-3-benzyldiazirine and 3-chloro-3-(phenyldideuteriomethyl)diazirine in isooctane over the 60 to -80-degrees-C temperature range gives rise to curved Arrhenius plots for both 1,2-H and 1,2-D migration in benzylchlorcarbene. The k(H)/k(D) values increase smoothly from 0.87 to 2.62 when the temperature increases from -60 to +30-degrees-C. The k(H)/k(D) value is approximately 4 for most of the temperatures studied if a solvent correction is applied. Quantum mechanical tunnelling or the influence of the solvent may be a possible explanation for these observations.PT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 BONNEAU R, 1992, J PHOTOCH PHOTOBIO A, V68, P97 DIX EJ, 1993, J AM CHEM SOC, V115, P10424 EVANSECK JD, 1990, J PHYS CHEM-US, V94, P5518 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 JACKSON JE, 1994, ADV CARBENE CHEM JONES M, 1980, REACTIVE INTERMEDIAT, V2 KIRMSE W, 1971, CARBENE CHEM LIU MTH, 1984, TETRAHEDRON, V40, P887 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1992, J PHOTOCH PHOTOBIO A, V63, P115 LIU MTH, 1992, J PHYS ORG CHEM, V15, P285 LIU MTH, 1994, RES CHEM INTERMEDIAT, V20, P195 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MOSS RA, 1992, TETRAHEDRON LETT, V33, P4287 MOSS RA, 1994, ADV CARBENE CHEM MUROV SL, 1973, HDB PHOTOCHEMISTRY NICKON A, 1993, ACCOUNTS CHEM RES, V26, P84 SALIS GA, 1968, J PHYS CHEM-US, V72, P752 SANDER W, 1994, UNPUB SCHAEFER HF, 1979, ACCOUNTS CHEM RES, V12, P288 SCHOLLER WW, 1989, HOUBEN WEYL METHODEN, P41 SHIMANOUCHI T, 1972, TABLES MOL VIBRATION, V1 SUGIYAMA MH, 1992, J AM CHEM SOC, V114, P966 WIERLACHER S, 1993, J AM CHEM SOC, V115, P8943; NR: 25; TC: 20; J9: J PHOTOCHEM PHOTOBIOL A-CHEM; PG: 5; GA: PV021Source type: Electronic(1
Reactions of Arylcarbenes with Lewis Acids
No full textThe reactions of the three triplet ground state arylcarbenes diphenylcarbene 1, fluorenylidene 2, and dibenzocycloheptadienylidene 3 with the Lewis acids H2O, ICF3, and BF3 were studied under the conditions of matrix isolation. H2O was selected as typical hydrogen bond donor, ICF3 as halogen bond donor, and BF3 as strong Lewis acid. H2O forms hydrogen-bonded complexes of the singlet carbenes with 1 and 2, but not with 3. This is rationalized by the larger singlet-triplet gap of 3, which does not allow to stabilize the singlet state below the triplet state by hydrogen bonding. With ICF3, both 1 and 3 form halogen-bonded complexes of the singlet states of the carbenes. This indicates that halogen bonding stabilizes singlet carbenes more than hydrogen bonding. Carbene 2 reacts differently from 1 and 3 by forming an iodonium ylide, thus avoiding antiaromatic destabilization of the fluorenyl unit. With BF3, all three carbenes form zwitterionic Lewis acid/base complexes
Comparison of Growth in Pike-Perch (Sander lucioperca) and Hybrids of Pike-Perch (S. lucioperca) × Volga Pike-Perch (S. volgensis)
No full textGrowth of intensively cultured pike-perch Sander lucioperca (L.) and hybrids of pike-perch females × Volga pike-perch (S. volgensis Gmelin, 1789) males (1.75 g) were compared in a 35-day experiment. Fish were sorted into three groups (50 fish/aquarium): S. lucioperca grown separately (Group P), hybrids grown separately (Group H), and a mixed group of 25 S. lucioperca (Group Mp) grown together with 25 hybrids (Group Mh). The stocking density was 0.44 g/l. Final body weights were 6.83 g, 6.54 g, 5.17 g, and 4.84 g, and specific growth rates were 3.9%/day, 3.75%/day, 3.1%/day, and 2.89%/day, for groups Mp, P, Mh, and H, respectively. The weight, length, and specific growth rates of the S. lucioperca were significantly higher (p<0.05) than those of the hybrids, whether grown separately or together. The feed conversion rate of the hybrids grown separately was significantly higher (1.28 g/g) than all other groups. Further investigation is needed to study the growth performance of larger hybrids, to compare the hybrid with S. volgensis, and to investigate the possibility of cross hybridization
The Approach to Social Theory: Hazards and Benefits
No full textIntroduction -- On the idea of worldview and its relation to philosophy / Albert M Wolters -- On worldviews / James H. Olthuis -- On worldviews and philosophy: a response to Wolters and Olthuis / Nicholas Wolterstorff -- The approach to social theory: hazards and benefits / Sander Griffioen -- Sociology and progress: a worldview analysis of the crisis of modern society / Jan Verhoogt -- Worldview and the meaning of work / P.J.D. Drenth -- Society after the subject, philosophy after the worldview / William Rowe -- Epilogue: On faith and social science / Paul Marshal
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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