Luminescence Stimulated by Electron Transfer: Fluorescent Donor/Acceptor-Substituted Stilbenes Containing Pyrenoid and Heteroaromatic Subunits
✍ Scribed by Dr. Andreas Knorr; Prof. Dr. Jörg Daub
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 327 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
✦ Synopsis
a = 88.89(3), fi = 89.14(2), y = 61.85(2)", V = 8070(5) A', Z = 2, p,,,, =1.353 M ~I I -~, E. = 0.71073 A, T=153 K, p(Mo,,) = 0.679 mm-'. Data was collected on a Siemens-Stoe AED diffractometer using an oil-coated, rapidly cooled crystal of dimensions 0.4 x 0.3 x 0.3 mm mounted directly from solution 1131; S/w method (5" 5 20 5 45"). The data were corrected for absorption by a semiempirical method based upon P-scan data with maximum and minimum transmission of 0.908 and 0.775, respectively. Of 21 897 reflections collected, 21 131 were independent. The structure was solved by direct methods (SHELXTL PLUS) and refined by full matrix least squares on F 2 ; R1 [F > 4a(F)] and wR2 (all data) to 0.0729 and 0.1656, respectively (SHELXL-93, Gottingen, 1993). All the non-hydrogen atoms in the anion of 1 were refined with anisotropic displacement parameters. One of the [Li(thf),]+ cations and 3.5 of the 5.5 independent noncoordinated T H F molecules are disordered on two positions, halfof them on the inversion center. All five non-hydrogen atoms ofeach T H F molecule in the unit cell were refined with the same isotropic parameters and distance restraints. Hydrogen atoms were set geometrically. Maximum and minimum residual electron density in the final difference map. 2.018 and -1.103 e k 3 . respectively. Further details of the crystal structure investigation may he obtained from the