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198 Topics in Current Chemistry Editorial Board: A. de Meijere KN ...

198 Topics in Current Chemistry Editorial Board: A. de Meijere KN ...

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Functional Organic Zeolite Analogues 143<br />

the anthracene analogue. The excess hydrogen bond<strong>in</strong>g capability is used <strong>in</strong><br />

guest b<strong>in</strong>d<strong>in</strong>g (O-H◊◊◊O-H◊◊◊OC) as <strong>in</strong> the anthracene case above. The sheet<br />

formation for the tetraresorc<strong>in</strong>ol <strong>de</strong>rivative 41 occurs <strong>in</strong> such a way as <strong>de</strong>picted<br />

<strong>in</strong> 42. In this case, <strong>in</strong>tersheet hydrogen bond<strong>in</strong>g (O-H◊◊◊O-H◊◊◊O-H◊◊◊O-H) is<br />

sterically allowed and gives rise to a cont<strong>in</strong>uous channel (cross-sectional area<br />

33 Å 2 ) <strong>in</strong>corporat<strong>in</strong>g solvent (7C 6H 5CN) molecules [56].<br />

A set of vertical hydrogen bond<strong>in</strong>g is also used successfully to assemble cyclic<br />

pepti<strong>de</strong>s hav<strong>in</strong>g alternat<strong>in</strong>g l- and D-am<strong>in</strong>o acid moieties <strong>in</strong>to nanotubes [57].<br />

39<br />

41<br />

Fig. 11. Top view of 2D net formed by 39 or 41<br />

40<br />

42

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