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Photophysics and X-ray structure of crystalline 2-aminopurine

Robert K Neely1, Steven W Magennis, Simon Parsons

  • 1School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, UK.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|March 28, 2007
PubMed

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
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