3 article(s) from Kirsch, Peer
- Full Research Paper
- Published 14 Apr 2020
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Figure 1: Examples of liquid crystal candidates with negative values for dielectric anisotropy (Δε) [6-10].
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Figure 2: Synthetic candidate LC targets 8–11.
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Scheme 1: Synthesis of 8. Reagents and conditions: a) TMSCF3, NaI, THF, reflux, 55% [13,14].
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Scheme 2: Synthesis of 9. Reagents and conditions: a) NBS, HF·Py, DCM; b) t-BuOK, DCM, 42% in two steps [15]; c) ...
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Scheme 3: Synthesis of compound 10. Reagents and conditions: a) NaBH4, MeOH, rt, 45%; b) C4H9OCH=CH2, Pd(TFA)2...
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Scheme 4: Synthesis of compounds 11. Reagents and conditions: a) PPh3CH3Br, t-BuOK, diethyl ether, 0 °C to rt...
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Figure 3: Theory study exploring the relative energies for different conformers of 11a.
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- Full Research Paper
- Published 05 Nov 2013
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Figure 1: Schematic view of the different types of molecular arrangements in acene-based molecular semiconduc...
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Figure 2: Target compound 1 and its calculated electrostatic potential surface. The colors denote a range of ...
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Scheme 1: Syntheses of the substitution products 1 and 3: a) Catechol, K2CO3, THF; 60 °C, 4 h (12%). b) Catec...
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Figure 3: The crystal structure of 1 is characterized by brick wall-like stacks (left), which are arranged in...
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Figure 4: The electrostatic factors determining the packing of 1. The laterally interlinked sheets are stabil...
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Figure 5: The four closest pairs A–D in the crystal structure of 1. The corresponding transfer integrals for ...
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Figure 6: Geometries of HOMO (−5.64 eV, left) and LUMO (−1.29 eV, right) of 1 [15].
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- Full Research Paper
- Published 10 Aug 2012
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Figure 1: The Dunitz and Shearer structure of cyclododecane (1) [1,2]. There are four endo hydrogens above and fou...
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Figure 2: Crystal structures of (a) 1,1,4,4- (b) 1,1,7,7- and (c) 1,1,6,6-tetrafluorocyclododecanes (2–4) , i...
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Figure 3: Erythro- and threo-1,2-difluorocyclododecanes (5a and 5b).
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Scheme 1: Synthetic routes to erythro- (5a) and threo-1,2-difluorocyclododecane (5b).
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Figure 4: X-ray crystal structure of threo-1,2-difluorocyclododecane (5b) showing corner angles and represent...
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Figure 5: Variable-temperature 19F{1H} NMR of erythro- (5a) and threo-1,2-difluorocyclododecane (5b).
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Figure 6: Calculated relative energies of the conformations of the erythro (5a) and threo (5b) stereoisomers ...
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