Azulene

Azulene

Picometer Detection by Adaptive Holographic Interferometry

Published in Klaus D. Sattler, Fundamentals of PICOSCIENCE, 2013

By simultaneously imaging two different molecules observed onto the Pt⁡(111) surface with the same tunneling tip, we could isolate the effects of the tip from other causes of differences in resolution between molecular images. We imaged naphthalene and its isomer azulene, which consists of a seven-membered ring connected to a five-membered ring. 39 In STM images, azulene usually appeared as a round disk without other distinguishing features (Figure 8.7h) and sticks far less well to the surface than naphthalene, with the sticking coefficient down by a factor of 4 . With a particularly good tip, the naphthalene molecules would occasionally appear as double rings (Figure 8.7e), while azulene molecules would appear as single rings (Figure 8.7i).40We also saw evidence for molecular motion at room temperature.

Effect of donor acceptor substitution position on the electrical responsive properties of azulene system: a computational study

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Journal Information

Published in Molecular Physics, 2019

Rakesh Maity, Debkumar Mandal, Ajay Misra

Azulene is a fused bicyclic system consisting of a seven-membered tropylium cation and cyclopentadienyl anion ring. Now the substitution of electron withdrawing NO2 group and electron donating of NMe2 group to the seven- and five-membered ring of azulene makes it more polar. This results a greater charge transfer contribution of βCT to βav in case of AZ-7, AZ-8 & AZ-9. On the other hand the position of NMe2 at the 1-position of five-membered ring results less charge transfer character and hence lesser contribution of βCT to βav in case of AZ-1, AZ-2 and AZ-3.

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Picometer Detection by Adaptive Holographic Interferometry

Effect of donor acceptor substitution position on the electrical responsive properties of azulene system: a computational study