Molecular switches

Editors: Prof. Wiktor Szymanski, University Medical Center Groningen and
Prof. Stefan Hecht, Humboldt-Universität zu Berlin

Light offers outstanding possibilities for external regulation in a plethora of applications, which are enabled by molecular photoswitches that change their properties in a reversible manner upon illumination. This Beilstein Journal of Organic Chemistry thematic issue will cover all aspects of molecular photoswitches, from their discovery, design and synthesis, through spectroscopic and computational characterization, all the way to applications in materials, biological systems, and beyond. Contributions are invited that provide new insights into all facets of this multidisciplinary topic, ranging from physical and organic chemistry all the way to the materials and life sciences.

Submission is still open.

Reversible end-to-end assembly of selectively functionalized gold nanorods by light-responsive arylazopyrazole–cyclodextrin interaction

Maximilian Niehues,
Patricia Tegeder and
Bart Jan Ravoo

Full Research Paper
Published 26 Jun 2019

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1. Graphical Abstract
2. Scheme 1: Light-responsive end-to-end assembly of host-functionalized gold nanorods (AuNR) by cyclodextrin–AA...
  
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3. Scheme 2: Two-step ligand exchange reaction for the synthesis of water-soluble cyclodextrin end-functionalize...
  
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4. Figure 1: a) ζ-Potential measurement of different stages of the ligand exchange. b) UV–vis spectroscopy befor...
  
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5. Figure 2: UV–vis spectroscopy of a) [tCD+tTEG]AuNR with different amount of dAAP (0-35 µM). b) [tCD]AuNR with...
  
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6. Figure 3: SPR maxima of [tCD+tTEG]AuNR with dAAP during four cycles of irradiation. a) Longitudinal SPR. b) T...
  
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7. Figure 4: TEM-BF images of a) [tCD+tTEG]AuNR. b and c) AuNR end-to-end assemblies by dAAP (15 µM). d) Dissolv...
  
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8. Figure 5: Reversible aggregation of [tCD+tTEG]AuNR by addition of dAAP (15 µM) monitored by dynamic light sca...
  
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Beilstein J. Org. Chem. 2019, 15, 1407–1415, doi:10.3762/bjoc.15.140

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Diazocine-functionalized TATA platforms

Roland Löw,
Talina Rusch,
Fynn Röhricht,
Olaf Magnussen and
Rainer Herges

Full Research Paper
Published 05 Jul 2019

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1. Graphical Abstract
2. Figure 1: Structures of diazocine platform molecules (diazocine-TATAs) 1 and 2 in cis (1a, 2a) and trans-conf...
  
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3. Scheme 1: Synthesis route of para-diazocine platform molecule 1. a) Pd(dppf)Cl₂, Cu(I)I, Et₃N, 1 h, 60 °C; b)...
  
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4. Scheme 2: Synthesis route of meta-diazocine platform 2. a) 1: KOt-Bu, THF, 3 min, 0 °C, N₂; 2: Br₂, 5 min, 0 ...
  
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5. Figure 2: UV–vis spectra of 1 (left) and 2 (right) in THF at room temperature. Black: as synthesized, red: af...
  
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6. Figure 3: STM images (30 × 30 nm², U_bias = 0.3 V, I_t = 40 pA) of self-assembled monolayers of (a) compound 1 ...
  
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Beilstein J. Org. Chem. 2019, 15, 1485–1490, doi:10.3762/bjoc.15.150

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Molecular switches

Reversible end-to-end assembly of selectively functionalized gold nanorods by light-responsive arylazopyrazole–cyclodextrin interaction

Diazocine-functionalized TATA platforms

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