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14N quadrupole coupling in DAN and MBANP

✍ Scribed by R. Blinc; P. Kerkoc; J. Hulliger; R. Kind; P. Günter; J. Seliger; V. Žagar

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
263 KB
Volume
167
Category
Article
ISSN
0009-2614

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✦ Synopsis

The "N electric quadrupole coupling constants and asymmetry parameters have been detetmioed for the three chemicalIy oooequivalent nitrogen sites in both 4-(N,Ndimethyhunioo)-3-acetamidonitrobeozeoe (DAN) and ( -)-2-(a-methylbenzylomamino)-5-oitropyridine (MBANP) with the help of proton-nitrogen ouclear-quadrupole double resonance.

The nonlinear optical behaviour of organic molecules in the crystalline state has recently attracted a great deal of attention [ 11. One of the largest second-order hyperpolarizabilities has been found [ 2-5] in the nitroaniline derivate C10H13N303 -designated as DAN. Similar values were found in CloH,sN302 (MBANP). The structural formulas of these two compounds are shown in fig. 1 together with the related compound COANP [ 6 1. Both DAN and MBANP crystallize [ 7,8] in the monoclinic space group P2, with two formula units per unit cell (2~2). The unit-cell dimensions [

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