Beilstein J. Org. Chem.2013,9, 1–7, doi:10.3762/bjoc.9.1
; molecularpincer; molecular switches; photochromic compound; Introduction
Azobenzenes probably are the most frequently used photochromic switches in chemistry. They are employed as molecular actuators to drive a number of dynamic machine-like functions [1]. To achieve sophisticated engineering tasks such
solution at room temperature, trans-3,3’-EBAB 4 isomerizes to the more stable cis form with a half-life of 74 h. The corresponding half-life of trans-3,3’-acetamido-EBAB 5 is 46 h (Table 1).
Application as a molecularpincer
In the 1H NMR spectra of cis-4 and cis-5 the four protons of the ethylene bridge
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Graphical Abstract
Figure 1:
Configurations and conformations of 5,6-dihydrodibenzo[c,g][1,2]diazocine (1), and DFT (B3LYP/6-31G...